Merge branch 'for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio into i2c/for-4.15

Refactor i2c-gpio and its users to use gpiod. Done by GPIO maintainer
LinusW.

29 files changed, 422 insertions, 288 deletions

diff --git a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
index 4f8ec947c6bd..38a05562d1d2 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
@@ -2,25 +2,39 @@ Device-Tree bindings for i2c gpio driver
 
 Required properties:
 	- compatible = "i2c-gpio";
-	- gpios: sda and scl gpio
-
+	- sda-gpios: gpio used for the sda signal, this should be flagged as
+	  active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+	  from <dt-bindings/gpio/gpio.h> since the signal is by definition
+	  open drain.
+	- scl-gpios: gpio used for the scl signal, this should be flagged as
+	  active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+	  from <dt-bindings/gpio/gpio.h> since the signal is by definition
+	  open drain.
 
 Optional properties:
-	- i2c-gpio,sda-open-drain: sda as open drain
-	- i2c-gpio,scl-open-drain: scl as open drain
 	- i2c-gpio,scl-output-only: scl as output only
 	- i2c-gpio,delay-us: delay between GPIO operations (may depend on each platform)
 	- i2c-gpio,timeout-ms: timeout to get data
 
+Deprecated properties, do not use in new device tree sources:
+	- gpios: sda and scl gpio, alternative for {sda,scl}-gpios
+	- i2c-gpio,sda-open-drain: this means that something outside of our
+	  control has put the GPIO line used for SDA into open drain mode, and
+	  that something is not the GPIO chip. It is essentially an
+	  inconsistency flag.
+	- i2c-gpio,scl-open-drain: this means that something outside of our
+	  control has put the GPIO line used for SCL into open drain mode, and
+	  that something is not the GPIO chip. It is essentially an
+	  inconsistency flag.
+
 Example nodes:
 
+#include <dt-bindings/gpio/gpio.h>
+
 i2c@0 {
 	compatible = "i2c-gpio";
-	gpios = <&pioA 23 0 /* sda */
-		 &pioA 24 0 /* scl */
-		>;
-	i2c-gpio,sda-open-drain;
-	i2c-gpio,scl-open-drain;
+	sda-gpios = <&pioA 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+	scl-gpios = <&pioA 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
 	i2c-gpio,delay-us = <2>;	/* ~100 kHz */
 	#address-cells = <1>;
 	#size-cells = <0>;
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index f53c61813998..e70feec6fad5 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -31,7 +31,7 @@
 #include <linux/amba/serial.h>
 #include <linux/mtd/physmap.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/spi/spi.h>
 #include <linux/export.h>
 #include <linux/irqchip/arm-vic.h>
@@ -320,42 +320,47 @@ void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 /*************************************************************************
  * EP93xx i2c peripheral handling
  *************************************************************************/
-static struct i2c_gpio_platform_data ep93xx_i2c_data;
+
+/* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
+static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		/* Use local offsets on gpiochip/port "G" */
+		GPIO_LOOKUP_IDX("G", 1, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("G", 0, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
 
 static struct platform_device ep93xx_i2c_device = {
 	.name		= "i2c-gpio",
 	.id		= 0,
 	.dev		= {
-		.platform_data	= &ep93xx_i2c_data,
+		.platform_data	= NULL,
 	},
 };
 
 /**
  * ep93xx_register_i2c - Register the i2c platform device.
- * @data:	platform specific i2c-gpio configuration (__initdata)
  * @devices:	platform specific i2c bus device information (__initdata)
  * @num:	the number of devices on the i2c bus
  */
-void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
-				struct i2c_board_info *devices, int num)
+void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
 {
 	/*
-	 * Set the EEPROM interface pin drive type control.
-	 * Defines the driver type for the EECLK and EEDAT pins as either
-	 * open drain, which will require an external pull-up, or a normal
-	 * CMOS driver.
+	 * FIXME: this just sets the two pins as non-opendrain, as no
+	 * platforms tries to do that anyway. Flag the applicable lines
+	 * as open drain in the GPIO_LOOKUP above and the driver or
+	 * gpiolib will handle open drain/open drain emulation as need
+	 * be. Right now i2c-gpio emulates open drain which is not
+	 * optimal.
 	 */
-	if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
-		pr_warning("sda != EEDAT, open drain has no effect\n");
-	if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
-		pr_warning("scl != EECLK, open drain has no effect\n");
-
-	__raw_writel((data->sda_is_open_drain << 1) |
-		     (data->scl_is_open_drain << 0),
+	__raw_writel((0 << 1) | (0 << 0),
 		     EP93XX_GPIO_EEDRIVE);
 
-	ep93xx_i2c_data = *data;
 	i2c_register_board_info(0, devices, num);
+	gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
 	platform_device_register(&ep93xx_i2c_device);
 }
 
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index 7a7f280b07d7..8e89ec8b6f0f 100644
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -28,7 +28,6 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
 #include <linux/spi/spi.h>
 
 #include <sound/cs4271.h>
@@ -61,14 +60,6 @@ static struct ep93xx_eth_data __initdata edb93xx_eth_data = {
 /*************************************************************************
  * EDB93xx i2c peripheral handling
  *************************************************************************/
-static struct i2c_gpio_platform_data __initdata edb93xx_i2c_gpio_data = {
-	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
-	.sda_is_open_drain	= 0,
-	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
-	.scl_is_open_drain	= 0,
-	.udelay			= 0,	/* default to 100 kHz */
-	.timeout		= 0,	/* default to 100 ms */
-};
 
 static struct i2c_board_info __initdata edb93xxa_i2c_board_info[] = {
 	{
@@ -86,13 +77,11 @@ static void __init edb93xx_register_i2c(void)
 {
 	if (machine_is_edb9302a() || machine_is_edb9307a() ||
 	    machine_is_edb9315a()) {
-		ep93xx_register_i2c(&edb93xx_i2c_gpio_data,
-				    edb93xxa_i2c_board_info,
+		ep93xx_register_i2c(edb93xxa_i2c_board_info,
 				    ARRAY_SIZE(edb93xxa_i2c_board_info));
 	} else if (machine_is_edb9302() || machine_is_edb9307()
 		|| machine_is_edb9312() || machine_is_edb9315()) {
-		ep93xx_register_i2c(&edb93xx_i2c_gpio_data,
-				    edb93xx_i2c_board_info,
+		ep93xx_register_i2c(edb93xx_i2c_board_info,
 				    ARRAY_SIZE(edb93xx_i2c_board_info));
 	}
 }
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index db0839691ef5..a686fd6caee1 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -7,7 +7,6 @@
 #include <linux/reboot.h>
 
 struct device;
-struct i2c_gpio_platform_data;
 struct i2c_board_info;
 struct spi_board_info;
 struct platform_device;
@@ -36,8 +35,7 @@ void ep93xx_register_flash(unsigned int width,
 			   resource_size_t start, resource_size_t size);
 
 void ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr);
-void ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
-			 struct i2c_board_info *devices, int num);
+void ep93xx_register_i2c(struct i2c_board_info *devices, int num);
 void ep93xx_register_spi(struct ep93xx_spi_info *info,
 			 struct spi_board_info *devices, int num);
 void ep93xx_register_fb(struct ep93xxfb_mach_info *data);
diff --git a/arch/arm/mach-ep93xx/simone.c b/arch/arm/mach-ep93xx/simone.c
index c7a40f245892..e61f3dee24c2 100644
--- a/arch/arm/mach-ep93xx/simone.c
+++ b/arch/arm/mach-ep93xx/simone.c
@@ -19,7 +19,6 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
 #include <linux/mmc/host.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/mmc_spi.h>
@@ -129,15 +128,6 @@ static struct ep93xx_spi_info simone_spi_info __initdata = {
 	.use_dma = 1,
 };
 
-static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
-	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
-	.sda_is_open_drain	= 0,
-	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
-	.scl_is_open_drain	= 0,
-	.udelay			= 0,
-	.timeout		= 0,
-};
-
 static struct i2c_board_info __initdata simone_i2c_board_info[] = {
 	{
 		I2C_BOARD_INFO("ds1337", 0x68),
@@ -161,7 +151,7 @@ static void __init simone_init_machine(void)
 	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
 	ep93xx_register_eth(&simone_eth_data, 1);
 	ep93xx_register_fb(&simone_fb_info);
-	ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
+	ep93xx_register_i2c(simone_i2c_board_info,
 			    ARRAY_SIZE(simone_i2c_board_info));
 	ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
 			    ARRAY_SIZE(simone_spi_devices));
diff --git a/arch/arm/mach-ep93xx/snappercl15.c b/arch/arm/mach-ep93xx/snappercl15.c
index 8b29398f4dc7..45940c1d7787 100644
--- a/arch/arm/mach-ep93xx/snappercl15.c
+++ b/arch/arm/mach-ep93xx/snappercl15.c
@@ -21,7 +21,6 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
 #include <linux/fb.h>
 
 #include <linux/mtd/partitions.h>
@@ -127,15 +126,6 @@ static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
 	.phy_id			= 1,
 };
 
-static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
-	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
-	.sda_is_open_drain	= 0,
-	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
-	.scl_is_open_drain	= 0,
-	.udelay			= 0,
-	.timeout		= 0,
-};
-
 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
 	{
 		/* Audio codec */
@@ -161,7 +151,7 @@ static void __init snappercl15_init_machine(void)
 {
 	ep93xx_init_devices();
 	ep93xx_register_eth(&snappercl15_eth_data, 1);
-	ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
+	ep93xx_register_i2c(snappercl15_i2c_data,
 			    ARRAY_SIZE(snappercl15_i2c_data));
 	ep93xx_register_fb(&snappercl15_fb_info);
 	snappercl15_register_audio();
diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c
index 1daf9441058c..5a0b6187990a 100644
--- a/arch/arm/mach-ep93xx/vision_ep9307.c
+++ b/arch/arm/mach-ep93xx/vision_ep9307.c
@@ -22,7 +22,6 @@
 #include <linux/io.h>
 #include <linux/mtd/partitions.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
 #include <linux/platform_data/pca953x.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
@@ -144,10 +143,6 @@ static struct pca953x_platform_data pca953x_77_gpio_data = {
 /*************************************************************************
  * I2C Bus
  *************************************************************************/
-static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
-	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
-	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
-};
 
 static struct i2c_board_info vision_i2c_info[] __initdata = {
 	{
@@ -289,7 +284,7 @@ static void __init vision_init_machine(void)
 
 	vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 
-	ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
+	ep93xx_register_i2c(vision_i2c_info,
 				ARRAY_SIZE(vision_i2c_info));
 	ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 				ARRAY_SIZE(vision_spi_board_info));
diff --git a/arch/arm/mach-ixp4xx/avila-setup.c b/arch/arm/mach-ixp4xx/avila-setup.c
index 6beec150c060..bb6fbfc9b11a 100644
--- a/arch/arm/mach-ixp4xx/avila-setup.c
+++ b/arch/arm/mach-ixp4xx/avila-setup.c
@@ -17,7 +17,7 @@
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/serial_8250.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <asm/types.h>
 #include <asm/setup.h>
 #include <asm/memory.h>
@@ -49,16 +49,21 @@ static struct platform_device avila_flash = {
 	.resource	= &avila_flash_resource,
 };
 
-static struct i2c_gpio_platform_data avila_i2c_gpio_data = {
-	.sda_pin	= AVILA_SDA_PIN,
-	.scl_pin	= AVILA_SCL_PIN,
+static struct gpiod_lookup_table avila_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", AVILA_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", AVILA_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device avila_i2c_gpio = {
 	.name		= "i2c-gpio",
 	.id		= 0,
 	.dev	 = {
-		.platform_data	= &avila_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -147,6 +152,8 @@ static void __init avila_init(void)
 	avila_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
+	gpiod_add_lookup_table(&avila_i2c_gpiod_table);
+
 	platform_add_devices(avila_devices, ARRAY_SIZE(avila_devices));
 
 	avila_pata_resources[0].start = IXP4XX_EXP_BUS_BASE(1);
diff --git a/arch/arm/mach-ixp4xx/dsmg600-setup.c b/arch/arm/mach-ixp4xx/dsmg600-setup.c
index b3bd0e137f6d..af543dd3da5d 100644
--- a/arch/arm/mach-ixp4xx/dsmg600-setup.c
+++ b/arch/arm/mach-ixp4xx/dsmg600-setup.c
@@ -25,7 +25,7 @@
 #include <linux/leds.h>
 #include <linux/reboot.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 
 #include <mach/hardware.h>
 
@@ -68,16 +68,21 @@ static struct platform_device dsmg600_flash = {
 	.resource		= &dsmg600_flash_resource,
 };
 
-static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
-	.sda_pin		= DSMG600_SDA_PIN,
-	.scl_pin		= DSMG600_SCL_PIN,
+static struct gpiod_lookup_table dsmg600_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", DSMG600_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", DSMG600_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device dsmg600_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev	 = {
-		.platform_data	= &dsmg600_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -269,6 +274,7 @@ static void __init dsmg600_init(void)
 	dsmg600_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
+	gpiod_add_lookup_table(&dsmg600_i2c_gpiod_table);
 	i2c_register_board_info(0, dsmg600_i2c_board_info,
 				ARRAY_SIZE(dsmg600_i2c_board_info));
 
diff --git a/arch/arm/mach-ixp4xx/fsg-setup.c b/arch/arm/mach-ixp4xx/fsg-setup.c
index 5c4b0c4a1b37..8afb3f4db376 100644
--- a/arch/arm/mach-ixp4xx/fsg-setup.c
+++ b/arch/arm/mach-ixp4xx/fsg-setup.c
@@ -22,7 +22,7 @@
 #include <linux/leds.h>
 #include <linux/reboot.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/io.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -54,16 +54,21 @@ static struct platform_device fsg_flash = {
 	.resource		= &fsg_flash_resource,
 };
 
-static struct i2c_gpio_platform_data fsg_i2c_gpio_data = {
-	.sda_pin		= FSG_SDA_PIN,
-	.scl_pin		= FSG_SCL_PIN,
+static struct gpiod_lookup_table fsg_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device fsg_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev = {
-		.platform_data	= &fsg_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -196,6 +201,7 @@ static void __init fsg_init(void)
 	/* Configure CS2 for operation, 8bit and writable */
 	*IXP4XX_EXP_CS2 = 0xbfff0002;
 
+	gpiod_add_lookup_table(&fsg_i2c_gpiod_table);
 	i2c_register_board_info(0, fsg_i2c_board_info,
 				ARRAY_SIZE(fsg_i2c_board_info));
 
diff --git a/arch/arm/mach-ixp4xx/goramo_mlr.c b/arch/arm/mach-ixp4xx/goramo_mlr.c
index 80bd9d6d04de..f1529aa3f8e2 100644
--- a/arch/arm/mach-ixp4xx/goramo_mlr.c
+++ b/arch/arm/mach-ixp4xx/goramo_mlr.c
@@ -6,7 +6,6 @@
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/hdlc.h>
-#include <linux/i2c-gpio.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
@@ -78,6 +77,12 @@
 static u32 hw_bits = 0xFFFFFFFD;    /* assume all hardware present */;
 static u8 control_value;
 
+/*
+ * FIXME: this is reimplementing I2C bit-bangining. Move this
+ * over to using driver/i2c/busses/i2c-gpio.c like all other boards
+ * and register proper I2C device(s) on the bus for this. (See
+ * other IXP4xx boards for examples.)
+ */
 static void set_scl(u8 value)
 {
 	gpio_set_value(GPIO_SCL, !!value);
@@ -216,20 +221,6 @@ static struct platform_device device_flash = {
 	.resource	= &flash_resource,
 };
 
-
-/* I^2C interface */
-static struct i2c_gpio_platform_data i2c_data = {
-	.sda_pin	= GPIO_SDA,
-	.scl_pin	= GPIO_SCL,
-};
-
-static struct platform_device device_i2c = {
-	.name		= "i2c-gpio",
-	.id		= 0,
-	.dev		= { .platform_data = &i2c_data },
-};
-
-
 /* IXP425 2 UART ports */
 static struct resource uart_resources[] = {
 	{
@@ -411,9 +402,6 @@ static void __init gmlr_init(void)
 	if (hw_bits & CFG_HW_HAS_HSS1)
 		device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
 
-	if (hw_bits & CFG_HW_HAS_EEPROM)
-		device_tab[devices++] = &device_i2c; /* max index 6 */
-
 	gpio_request(GPIO_SCL, "SCL/clock");
 	gpio_request(GPIO_SDA, "SDA/data");
 	gpio_request(GPIO_STR, "strobe");
diff --git a/arch/arm/mach-ixp4xx/ixdp425-setup.c b/arch/arm/mach-ixp4xx/ixdp425-setup.c
index 93b89291c06b..4f358350a91f 100644
--- a/arch/arm/mach-ixp4xx/ixdp425-setup.c
+++ b/arch/arm/mach-ixp4xx/ixdp425-setup.c
@@ -14,7 +14,7 @@
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/serial_8250.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/io.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/rawnand.h>
@@ -122,16 +122,21 @@ static struct platform_device ixdp425_flash_nand = {
 };
 #endif	/* CONFIG_MTD_NAND_PLATFORM */
 
-static struct i2c_gpio_platform_data ixdp425_i2c_gpio_data = {
-	.sda_pin	= IXDP425_SDA_PIN,
-	.scl_pin	= IXDP425_SCL_PIN,
+static struct gpiod_lookup_table ixdp425_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", IXDP425_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", IXDP425_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device ixdp425_i2c_gpio = {
 	.name		= "i2c-gpio",
 	.id		= 0,
 	.dev	 = {
-		.platform_data	= &ixdp425_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -245,6 +250,7 @@ static void __init ixdp425_init(void)
 		ixdp425_uart_data[1].flags = 0;
 	}
 
+	gpiod_add_lookup_table(&ixdp425_i2c_gpiod_table);
 	platform_add_devices(ixdp425_devices, ARRAY_SIZE(ixdp425_devices));
 }
 
diff --git a/arch/arm/mach-ixp4xx/nas100d-setup.c b/arch/arm/mach-ixp4xx/nas100d-setup.c
index 4e0f762bc651..7e59c59c96a3 100644
--- a/arch/arm/mach-ixp4xx/nas100d-setup.c
+++ b/arch/arm/mach-ixp4xx/nas100d-setup.c
@@ -27,7 +27,7 @@
 #include <linux/leds.h>
 #include <linux/reboot.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/io.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -100,16 +100,21 @@ static struct platform_device nas100d_leds = {
 	.dev.platform_data	= &nas100d_led_data,
 };
 
-static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
-	.sda_pin		= NAS100D_SDA_PIN,
-	.scl_pin		= NAS100D_SCL_PIN,
+static struct gpiod_lookup_table nas100d_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device nas100d_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev	 = {
-		.platform_data	= &nas100d_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -280,6 +285,7 @@ static void __init nas100d_init(void)
 	nas100d_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
+	gpiod_add_lookup_table(&nas100d_i2c_gpiod_table);
 	i2c_register_board_info(0, nas100d_i2c_board_info,
 				ARRAY_SIZE(nas100d_i2c_board_info));
 
diff --git a/arch/arm/mach-ixp4xx/nslu2-setup.c b/arch/arm/mach-ixp4xx/nslu2-setup.c
index 88c025f52d8d..224717eb8ac2 100644
--- a/arch/arm/mach-ixp4xx/nslu2-setup.c
+++ b/arch/arm/mach-ixp4xx/nslu2-setup.c
@@ -24,7 +24,7 @@
 #include <linux/leds.h>
 #include <linux/reboot.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/io.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -68,9 +68,14 @@ static struct platform_device nslu2_flash = {
 	.resource		= &nslu2_flash_resource,
 };
 
-static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
-	.sda_pin		= NSLU2_SDA_PIN,
-	.scl_pin		= NSLU2_SCL_PIN,
+static struct gpiod_lookup_table nslu2_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
@@ -115,7 +120,7 @@ static struct platform_device nslu2_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev	 = {
-		.platform_data	= &nslu2_i2c_gpio_data,
+		.platform_data	= NULL,
 	},
 };
 
@@ -250,6 +255,7 @@ static void __init nslu2_init(void)
 	nslu2_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
+	gpiod_add_lookup_table(&nslu2_i2c_gpiod_table);
 	i2c_register_board_info(0, nslu2_i2c_board_info,
 				ARRAY_SIZE(nslu2_i2c_board_info));
 
diff --git a/arch/arm/mach-ks8695/board-acs5k.c b/arch/arm/mach-ks8695/board-acs5k.c
index e4d709c8ed32..937eb1d47e7b 100644
--- a/arch/arm/mach-ks8695/board-acs5k.c
+++ b/arch/arm/mach-ks8695/board-acs5k.c
@@ -16,7 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
-
+#include <linux/gpio/machine.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 #include <linux/i2c-gpio.h>
@@ -38,9 +38,17 @@
 
 #include "generic.h"
 
+static struct gpiod_lookup_table acs5k_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("KS8695", 4, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("KS8695", 5, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
-	.sda_pin	= 4,
-	.scl_pin	= 5,
 	.udelay		= 10,
 };
 
@@ -95,6 +103,7 @@ static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
 static void acs5k_i2c_init(void)
 {
 	/* The gpio interface */
+	gpiod_add_lookup_table(&acs5k_i2c_gpiod_table);
 	platform_device_register(&acs5k_i2c_device);
 	/* I2C devices */
 	i2c_register_board_info(0, acs5k_i2c_devs,
diff --git a/arch/arm/mach-pxa/palmz72.c b/arch/arm/mach-pxa/palmz72.c
index 29630061e700..5877e547cecd 100644
--- a/arch/arm/mach-pxa/palmz72.c
+++ b/arch/arm/mach-pxa/palmz72.c
@@ -31,6 +31,7 @@
 #include <linux/power_supply.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 
 #include <asm/mach-types.h>
 #include <asm/suspend.h>
@@ -320,9 +321,17 @@ static struct soc_camera_link palmz72_iclink = {
 	.flags		= SOCAM_DATAWIDTH_8,
 };
 
+static struct gpiod_lookup_table palmz72_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("gpio-pxa", 118, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("gpio-pxa", 117, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data palmz72_i2c_bus_data = {
-	.sda_pin	= 118,
-	.scl_pin	= 117,
 	.udelay		= 10,
 	.timeout	= 100,
 };
@@ -369,6 +378,7 @@ static void __init palmz72_camera_init(void)
 {
 	palmz72_cam_gpio_init();
 	pxa_set_camera_info(&palmz72_pxacamera_platform_data);
+	gpiod_add_lookup_table(&palmz72_i2c_gpiod_table);
 	platform_device_register(&palmz72_i2c_bus_device);
 	platform_device_register(&palmz72_camera);
 }
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index 8e89d91b206b..4185e7ff073f 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -36,6 +36,7 @@
 #include <linux/gpio.h>
 #include <linux/jiffies.h>
 #include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/i2c/pxa-i2c.h>
 #include <linux/serial_8250.h>
 #include <linux/smc91x.h>
@@ -458,9 +459,17 @@ static struct platform_device smc91x_device = {
 };
 
 /* i2c */
+static struct gpiod_lookup_table viper_i2c_gpiod_table = {
+	.dev_id		= "i2c-gpio",
+	.table		= {
+		GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data i2c_bus_data = {
-	.sda_pin = VIPER_RTC_I2C_SDA_GPIO,
-	.scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 	.udelay  = 10,
 	.timeout = HZ,
 };
@@ -779,12 +788,20 @@ static int __init viper_tpm_setup(char *str)
 
 __setup("tpm=", viper_tpm_setup);
 
+struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static void __init viper_tpm_init(void)
 {
 	struct platform_device *tpm_device;
 	struct i2c_gpio_platform_data i2c_tpm_data = {
-		.sda_pin = VIPER_TPM_I2C_SDA_GPIO,
-		.scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 		.udelay  = 10,
 		.timeout = HZ,
 	};
@@ -794,6 +811,7 @@ static void __init viper_tpm_init(void)
 	if (!viper_tpm)
 		return;
 
+	gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
 	tpm_device = platform_device_alloc("i2c-gpio", 2);
 	if (tpm_device) {
 		if (!platform_device_add_data(tpm_device,
@@ -943,6 +961,7 @@ static void __init viper_init(void)
 		smc91x_device.num_resources--;
 
 	pxa_set_i2c_info(NULL);
+	gpiod_add_lookup_table(&viper_i2c_gpiod_table);
 	pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
 	platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 
diff --git a/arch/arm/mach-sa1100/simpad.c b/arch/arm/mach-sa1100/simpad.c
index bb3ca9c763de..91526024964b 100644
--- a/arch/arm/mach-sa1100/simpad.c
+++ b/arch/arm/mach-sa1100/simpad.c
@@ -16,6 +16,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/io.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
 
 #include <mach/hardware.h>
 #include <asm/setup.h>
@@ -323,9 +324,17 @@ static struct platform_device simpad_gpio_leds = {
 /*
  * i2c
  */
+static struct gpiod_lookup_table simpad_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("gpio", GPIO_GPIO21, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("gpio", GPIO_GPIO25, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data simpad_i2c_data = {
-	.sda_pin = GPIO_GPIO21,
-	.scl_pin = GPIO_GPIO25,
 	.udelay = 10,
 	.timeout = HZ,
 };
@@ -380,6 +389,7 @@ static int __init simpad_init(void)
 			      ARRAY_SIZE(simpad_flash_resources));
 	sa11x0_register_mcp(&simpad_mcp_data);
 
+	gpiod_add_lookup_table(&simpad_i2c_gpiod_table);
 	ret = platform_add_devices(devices, ARRAY_SIZE(devices));
 	if(ret)
 		printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
diff --git a/arch/blackfin/mach-bf533/boards/blackstamp.c b/arch/blackfin/mach-bf533/boards/blackstamp.c
index 0ccf0cf4daaf..fab69c736515 100644
--- a/arch/blackfin/mach-bf533/boards/blackstamp.c
+++ b/arch/blackfin/mach-bf533/boards/blackstamp.c
@@ -22,6 +22,7 @@
 #include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
+#include <linux/gpio/machine.h>
 #include <asm/dma.h>
 #include <asm/bfin5xx_spi.h>
 #include <asm/portmux.h>
@@ -362,11 +363,17 @@ static struct platform_device bfin_device_gpiokeys = {
 #if IS_ENABLED(CONFIG_I2C_GPIO)
 #include <linux/i2c-gpio.h>
 
+static struct gpiod_lookup_table bfin_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF8, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF9, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data i2c_gpio_data = {
-	.sda_pin		= GPIO_PF8,
-	.scl_pin		= GPIO_PF9,
-	.sda_is_open_drain	= 0,
-	.scl_is_open_drain	= 0,
 	.udelay			= 40,
 }; /* This hasn't actually been used these pins
     * are (currently) free pins on the expansion connector */
@@ -462,7 +469,9 @@ static int __init blackstamp_init(void)
 	int ret;
 
 	printk(KERN_INFO "%s(): registering device resources\n", __func__);
-
+#if IS_ENABLED(CONFIG_I2C_GPIO)
+	gpiod_add_lookup_table(&bfin_i2c_gpiod_table);
+#endif
 	i2c_register_board_info(0, bfin_i2c_board_info,
 				ARRAY_SIZE(bfin_i2c_board_info));
 
diff --git a/arch/blackfin/mach-bf533/boards/ezkit.c b/arch/blackfin/mach-bf533/boards/ezkit.c
index 3625e9eaa8a8..d64d270e9e62 100644
--- a/arch/blackfin/mach-bf533/boards/ezkit.c
+++ b/arch/blackfin/mach-bf533/boards/ezkit.c
@@ -19,6 +19,7 @@
 #endif
 #include <linux/irq.h>
 #include <linux/i2c.h>
+#include <linux/gpio/machine.h>
 #include <asm/dma.h>
 #include <asm/bfin5xx_spi.h>
 #include <asm/portmux.h>
@@ -390,11 +391,17 @@ static struct platform_device bfin_device_gpiokeys = {
 #if IS_ENABLED(CONFIG_I2C_GPIO)
 #include <linux/i2c-gpio.h>
 
+static struct gpiod_lookup_table bfin_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF1, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF0, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data i2c_gpio_data = {
-	.sda_pin		= GPIO_PF1,
-	.scl_pin		= GPIO_PF0,
-	.sda_is_open_drain	= 0,
-	.scl_is_open_drain	= 0,
 	.udelay			= 40,
 };
 
@@ -516,6 +523,9 @@ static struct platform_device *ezkit_devices[] __initdata = {
 static int __init ezkit_init(void)
 {
 	printk(KERN_INFO "%s(): registering device resources\n", __func__);
+#if IS_ENABLED(CONFIG_I2C_GPIO)
+	gpiod_add_lookup_table(&bfin_i2c_gpiod_table);
+#endif
 	platform_add_devices(ezkit_devices, ARRAY_SIZE(ezkit_devices));
 	spi_register_board_info(bfin_spi_board_info, ARRAY_SIZE(bfin_spi_board_info));
 	i2c_register_board_info(0, bfin_i2c_board_info,
diff --git a/arch/blackfin/mach-bf533/boards/stamp.c b/arch/blackfin/mach-bf533/boards/stamp.c
index 23eada79439c..27cbf2fa2c62 100644
--- a/arch/blackfin/mach-bf533/boards/stamp.c
+++ b/arch/blackfin/mach-bf533/boards/stamp.c
@@ -21,6 +21,7 @@
 #include <linux/gpio.h>
 #include <linux/irq.h>
 #include <linux/i2c.h>
+#include <linux/gpio/machine.h>
 #include <asm/dma.h>
 #include <asm/bfin5xx_spi.h>
 #include <asm/reboot.h>
@@ -512,11 +513,17 @@ static struct platform_device bfin_device_gpiokeys = {
 #if IS_ENABLED(CONFIG_I2C_GPIO)
 #include <linux/i2c-gpio.h>
 
+static struct gpiod_lookup_table bfin_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF2, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF3, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data i2c_gpio_data = {
-	.sda_pin		= GPIO_PF2,
-	.scl_pin		= GPIO_PF3,
-	.sda_is_open_drain	= 0,
-	.scl_is_open_drain	= 0,
 	.udelay			= 10,
 };
 
@@ -848,6 +855,9 @@ static int __init stamp_init(void)
 
 	printk(KERN_INFO "%s(): registering device resources\n", __func__);
 
+#if IS_ENABLED(CONFIG_I2C_GPIO)
+	gpiod_add_lookup_table(&bfin_i2c_gpiod_table);
+#endif
 	i2c_register_board_info(0, bfin_i2c_board_info,
 				ARRAY_SIZE(bfin_i2c_board_info));
 
diff --git a/arch/blackfin/mach-bf561/boards/ezkit.c b/arch/blackfin/mach-bf561/boards/ezkit.c
index 57d1c43726d9..acc5363f60c6 100644
--- a/arch/blackfin/mach-bf561/boards/ezkit.c
+++ b/arch/blackfin/mach-bf561/boards/ezkit.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
 #include <linux/delay.h>
+#include <linux/gpio/machine.h>
 #include <asm/dma.h>
 #include <asm/bfin5xx_spi.h>
 #include <asm/portmux.h>
@@ -379,11 +380,17 @@ static struct platform_device bfin_device_gpiokeys = {
 #if IS_ENABLED(CONFIG_I2C_GPIO)
 #include <linux/i2c-gpio.h>
 
+static struct gpiod_lookup_table bfin_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF1, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF0, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
+};
+
 static struct i2c_gpio_platform_data i2c_gpio_data = {
-	.sda_pin		= GPIO_PF1,
-	.scl_pin		= GPIO_PF0,
-	.sda_is_open_drain	= 0,
-	.scl_is_open_drain	= 0,
 	.udelay			= 10,
 };
 
@@ -633,6 +640,9 @@ static int __init ezkit_init(void)
 
 	printk(KERN_INFO "%s(): registering device resources\n", __func__);
 
+#if IS_ENABLED(CONFIG_I2C_GPIO)
+	gpiod_add_lookup_table(&bfin_i2c_gpiod_table);
+#endif
 	ret = platform_add_devices(ezkit_devices, ARRAY_SIZE(ezkit_devices));
 	if (ret < 0)
 		return ret;
diff --git a/arch/mips/alchemy/board-gpr.c b/arch/mips/alchemy/board-gpr.c
index 6fb6b3faa158..328d697e72b4 100644
--- a/arch/mips/alchemy/board-gpr.c
+++ b/arch/mips/alchemy/board-gpr.c
@@ -30,6 +30,7 @@
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <asm/bootinfo.h>
 #include <asm/idle.h>
 #include <asm/reboot.h>
@@ -218,10 +219,27 @@ static struct platform_device gpr_led_devices = {
 /*
  * I2C
  */
+static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		/*
+		 * This should be on "GPIO2" which has base at 200 so
+		 * the global numbers 209 and 210 should correspond to
+		 * local offsets 9 and 10.
+		 */
+		GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
+				GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
+				GPIO_ACTIVE_HIGH),
+	},
+};
+
 static struct i2c_gpio_platform_data gpr_i2c_data = {
-	.sda_pin		= 209,
+	/*
+	 * The open drain mode is hardwired somewhere or an electrical
+	 * property of the alchemy GPIO controller.
+	 */
 	.sda_is_open_drain	= 1,
-	.scl_pin		= 210,
 	.scl_is_open_drain	= 1,
 	.udelay			= 2,		/* ~100 kHz */
 	.timeout		= HZ,
@@ -295,6 +313,7 @@ arch_initcall(gpr_pci_init);
 
 static int __init gpr_dev_init(void)
 {
+	gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
 	i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
 
 	return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
diff --git a/arch/mips/ath79/mach-pb44.c b/arch/mips/ath79/mach-pb44.c
index be78298dffb4..6b2c6f3baefa 100644
--- a/arch/mips/ath79/mach-pb44.c
+++ b/arch/mips/ath79/mach-pb44.c
@@ -11,7 +11,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/platform_data/pcf857x.h>
 
 #include "machtypes.h"
@@ -33,16 +33,21 @@
 #define PB44_KEYS_POLL_INTERVAL		20	/* msecs */
 #define PB44_KEYS_DEBOUNCE_INTERVAL	(3 * PB44_KEYS_POLL_INTERVAL)
 
-static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
-	.sda_pin	= PB44_GPIO_I2C_SDA,
-	.scl_pin	= PB44_GPIO_I2C_SCL,
+static struct gpiod_lookup_table pb44_i2c_gpiod_table = {
+	.dev_id = "i2c-gpio",
+	.table = {
+		GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SDA,
+				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+		GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SCL,
+				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+	},
 };
 
 static struct platform_device pb44_i2c_gpio_device = {
 	.name		= "i2c-gpio",
 	.id		= 0,
 	.dev = {
-		.platform_data	= &pb44_i2c_gpio_data,
+		.platform_data	= NULL,
 	}
 };
 
@@ -103,6 +108,7 @@ static struct ath79_spi_platform_data pb44_spi_data = {
 
 static void __init pb44_init(void)
 {
+	gpiod_add_lookup_table(&pb44_i2c_gpiod_table);
 	i2c_register_board_info(0, pb44_i2c_board_info,
 				ARRAY_SIZE(pb44_i2c_board_info));
 	platform_device_register(&pb44_i2c_gpio_device);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index eb80dac4e26a..c952ef1b2f46 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3264,8 +3264,21 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
 
 	if (lflags & GPIO_ACTIVE_LOW)
 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+
 	if (lflags & GPIO_OPEN_DRAIN)
 		set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+	else if (dflags & GPIOD_FLAGS_BIT_OPEN_DRAIN) {
+		/*
+		 * This enforces open drain mode from the consumer side.
+		 * This is necessary for some busses like I2C, but the lookup
+		 * should *REALLY* have specified them as open drain in the
+		 * first place, so print a little warning here.
+		 */
+		set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+		gpiod_warn(desc,
+			   "enforced open drain please flag it properly in DT/ACPI DSDT/board file\n");
+	}
+
 	if (lflags & GPIO_OPEN_SOURCE)
 		set_bit(FLAG_OPEN_SOURCE, &desc->flags);
 	if (lflags & GPIO_SLEEP_MAY_LOOSE_VALUE)
diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
index 0ef8fcc6ac3a..d80ea6ce91bb 100644
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -14,27 +14,17 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 
 struct i2c_gpio_private_data {
+	struct gpio_desc *sda;
+	struct gpio_desc *scl;
 	struct i2c_adapter adap;
 	struct i2c_algo_bit_data bit_data;
 	struct i2c_gpio_platform_data pdata;
 };
 
-/* Toggle SDA by changing the direction of the pin */
-static void i2c_gpio_setsda_dir(void *data, int state)
-{
-	struct i2c_gpio_platform_data *pdata = data;
-
-	if (state)
-		gpio_direction_input(pdata->sda_pin);
-	else
-		gpio_direction_output(pdata->sda_pin, 0);
-}
-
 /*
  * Toggle SDA by changing the output value of the pin. This is only
  * valid for pins configured as open drain (i.e. setting the value
@@ -42,20 +32,9 @@ static void i2c_gpio_setsda_dir(void *data, int state)
  */
 static void i2c_gpio_setsda_val(void *data, int state)
 {
-	struct i2c_gpio_platform_data *pdata = data;
-
-	gpio_set_value(pdata->sda_pin, state);
-}
-
-/* Toggle SCL by changing the direction of the pin. */
-static void i2c_gpio_setscl_dir(void *data, int state)
-{
-	struct i2c_gpio_platform_data *pdata = data;
+	struct i2c_gpio_private_data *priv = data;
 
-	if (state)
-		gpio_direction_input(pdata->scl_pin);
-	else
-		gpio_direction_output(pdata->scl_pin, 0);
+	gpiod_set_value(priv->sda, state);
 }
 
 /*
@@ -66,44 +45,23 @@ static void i2c_gpio_setscl_dir(void *data, int state)
  */
 static void i2c_gpio_setscl_val(void *data, int state)
 {
-	struct i2c_gpio_platform_data *pdata = data;
+	struct i2c_gpio_private_data *priv = data;
 
-	gpio_set_value(pdata->scl_pin, state);
+	gpiod_set_value(priv->scl, state);
 }
 
 static int i2c_gpio_getsda(void *data)
 {
-	struct i2c_gpio_platform_data *pdata = data;
+	struct i2c_gpio_private_data *priv = data;
 
-	return gpio_get_value(pdata->sda_pin);
+	return gpiod_get_value(priv->sda);
 }
 
 static int i2c_gpio_getscl(void *data)
 {
-	struct i2c_gpio_platform_data *pdata = data;
-
-	return gpio_get_value(pdata->scl_pin);
-}
-
-static int of_i2c_gpio_get_pins(struct device_node *np,
-				unsigned int *sda_pin, unsigned int *scl_pin)
-{
-	if (of_gpio_count(np) < 2)
-		return -ENODEV;
-
-	*sda_pin = of_get_gpio(np, 0);
-	*scl_pin = of_get_gpio(np, 1);
-
-	if (*sda_pin == -EPROBE_DEFER || *scl_pin == -EPROBE_DEFER)
-		return -EPROBE_DEFER;
-
-	if (!gpio_is_valid(*sda_pin) || !gpio_is_valid(*scl_pin)) {
-		pr_err("%pOF: invalid GPIO pins, sda=%d/scl=%d\n",
-		       np, *sda_pin, *scl_pin);
-		return -ENODEV;
-	}
+	struct i2c_gpio_private_data *priv = data;
 
-	return 0;
+	return gpiod_get_value(priv->scl);
 }
 
 static void of_i2c_gpio_get_props(struct device_node *np,
@@ -124,72 +82,105 @@ static void of_i2c_gpio_get_props(struct device_node *np,
 		of_property_read_bool(np, "i2c-gpio,scl-output-only");
 }
 
+static struct gpio_desc *i2c_gpio_get_desc(struct device *dev,
+					   const char *con_id,
+					   unsigned int index,
+					   enum gpiod_flags gflags)
+{
+	struct gpio_desc *retdesc;
+	int ret;
+
+	retdesc = devm_gpiod_get(dev, con_id, gflags);
+	if (!IS_ERR(retdesc)) {
+		dev_dbg(dev, "got GPIO from name %s\n", con_id);
+		return retdesc;
+	}
+
+	retdesc = devm_gpiod_get_index(dev, NULL, index, gflags);
+	if (!IS_ERR(retdesc)) {
+		dev_dbg(dev, "got GPIO from index %u\n", index);
+		return retdesc;
+	}
+
+	ret = PTR_ERR(retdesc);
+
+	/* FIXME: hack in the old code, is this really necessary? */
+	if (ret == -EINVAL)
+		retdesc = ERR_PTR(-EPROBE_DEFER);
+
+	/* This happens if the GPIO driver is not yet probed, let's defer */
+	if (ret == -ENOENT)
+		retdesc = ERR_PTR(-EPROBE_DEFER);
+
+	if (ret != -EPROBE_DEFER)
+		dev_err(dev, "error trying to get descriptor: %d\n", ret);
+
+	return retdesc;
+}
+
 static int i2c_gpio_probe(struct platform_device *pdev)
 {
 	struct i2c_gpio_private_data *priv;
 	struct i2c_gpio_platform_data *pdata;
 	struct i2c_algo_bit_data *bit_data;
 	struct i2c_adapter *adap;
-	unsigned int sda_pin, scl_pin;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	enum gpiod_flags gflags;
 	int ret;
 
-	/* First get the GPIO pins; if it fails, we'll defer the probe. */
-	if (pdev->dev.of_node) {
-		ret = of_i2c_gpio_get_pins(pdev->dev.of_node,
-					   &sda_pin, &scl_pin);
-		if (ret)
-			return ret;
-	} else {
-		if (!dev_get_platdata(&pdev->dev))
-			return -ENXIO;
-		pdata = dev_get_platdata(&pdev->dev);
-		sda_pin = pdata->sda_pin;
-		scl_pin = pdata->scl_pin;
-	}
-
-	ret = devm_gpio_request(&pdev->dev, sda_pin, "sda");
-	if (ret) {
-		if (ret == -EINVAL)
-			ret = -EPROBE_DEFER;	/* Try again later */
-		return ret;
-	}
-	ret = devm_gpio_request(&pdev->dev, scl_pin, "scl");
-	if (ret) {
-		if (ret == -EINVAL)
-			ret = -EPROBE_DEFER;	/* Try again later */
-		return ret;
-	}
-
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
+
 	adap = &priv->adap;
 	bit_data = &priv->bit_data;
 	pdata = &priv->pdata;
 
-	if (pdev->dev.of_node) {
-		pdata->sda_pin = sda_pin;
-		pdata->scl_pin = scl_pin;
-		of_i2c_gpio_get_props(pdev->dev.of_node, pdata);
+	if (np) {
+		of_i2c_gpio_get_props(np, pdata);
 	} else {
-		memcpy(pdata, dev_get_platdata(&pdev->dev), sizeof(*pdata));
+		/*
+		 * If all platform data settings are zero it is OK
+		 * to not provide any platform data from the board.
+		 */
+		if (dev_get_platdata(dev))
+			memcpy(pdata, dev_get_platdata(dev), sizeof(*pdata));
 	}
 
-	if (pdata->sda_is_open_drain) {
-		gpio_direction_output(pdata->sda_pin, 1);
-		bit_data->setsda = i2c_gpio_setsda_val;
-	} else {
-		gpio_direction_input(pdata->sda_pin);
-		bit_data->setsda = i2c_gpio_setsda_dir;
-	}
+	/*
+	 * First get the GPIO pins; if it fails, we'll defer the probe.
+	 * If the SDA line is marked from platform data or device tree as
+	 * "open drain" it means something outside of our control is making
+	 * this line being handled as open drain, and we should just handle
+	 * it as any other output. Else we enforce open drain as this is
+	 * required for an I2C bus.
+	 */
+	if (pdata->sda_is_open_drain)
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_HIGH_OPEN_DRAIN;
+	priv->sda = i2c_gpio_get_desc(dev, "sda", 0, gflags);
+	if (IS_ERR(priv->sda))
+		return PTR_ERR(priv->sda);
+
+	/*
+	 * If the SCL line is marked from platform data or device tree as
+	 * "open drain" it means something outside of our control is making
+	 * this line being handled as open drain, and we should just handle
+	 * it as any other output. Else we enforce open drain as this is
+	 * required for an I2C bus.
+	 */
+	if (pdata->scl_is_open_drain)
+		gflags = GPIOD_OUT_LOW;
+	else
+		gflags = GPIOD_OUT_LOW_OPEN_DRAIN;
+	priv->scl = i2c_gpio_get_desc(dev, "scl", 1, gflags);
+	if (IS_ERR(priv->scl))
+		return PTR_ERR(priv->scl);
 
-	if (pdata->scl_is_open_drain || pdata->scl_is_output_only) {
-		gpio_direction_output(pdata->scl_pin, 1);
-		bit_data->setscl = i2c_gpio_setscl_val;
-	} else {
-		gpio_direction_input(pdata->scl_pin);
-		bit_data->setscl = i2c_gpio_setscl_dir;
-	}
+	bit_data->setsda = i2c_gpio_setsda_val;
+	bit_data->setscl = i2c_gpio_setscl_val;
 
 	if (!pdata->scl_is_output_only)
 		bit_data->getscl = i2c_gpio_getscl;
@@ -207,18 +198,18 @@ static int i2c_gpio_probe(struct platform_device *pdev)
 	else
 		bit_data->timeout = HZ / 10;		/* 100 ms */
 
-	bit_data->data = pdata;
+	bit_data->data = priv;
 
 	adap->owner = THIS_MODULE;
-	if (pdev->dev.of_node)
-		strlcpy(adap->name, dev_name(&pdev->dev), sizeof(adap->name));
+	if (np)
+		strlcpy(adap->name, dev_name(dev), sizeof(adap->name));
 	else
 		snprintf(adap->name, sizeof(adap->name), "i2c-gpio%d", pdev->id);
 
 	adap->algo_data = bit_data;
 	adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
-	adap->dev.parent = &pdev->dev;
-	adap->dev.of_node = pdev->dev.of_node;
+	adap->dev.parent = dev;
+	adap->dev.of_node = np;
 
 	adap->nr = pdev->id;
 	ret = i2c_bit_add_numbered_bus(adap);
@@ -227,8 +218,13 @@ static int i2c_gpio_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	dev_info(&pdev->dev, "using pins %u (SDA) and %u (SCL%s)\n",
-		 pdata->sda_pin, pdata->scl_pin,
+	/*
+	 * FIXME: using global GPIO numbers is not helpful. If/when we
+	 * get accessors to get the actual name of the GPIO line,
+	 * from the descriptor, then provide that instead.
+	 */
+	dev_info(dev, "using lines %u (SDA) and %u (SCL%s)\n",
+		 desc_to_gpio(priv->sda), desc_to_gpio(priv->scl),
 		 pdata->scl_is_output_only
 		 ? ", no clock stretching" : "");
 
diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 40534352e574..ad774161a22d 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/slab.h>
 
 #include <linux/sm501.h>
@@ -1107,14 +1108,6 @@ static void sm501_gpio_remove(struct sm501_devdata *sm)
 	kfree(gpio->regs_res);
 }
 
-static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
-{
-	struct sm501_gpio *gpio = &sm->gpio;
-	int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
-
-	return (pin % 32) + base;
-}
-
 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
 {
 	return sm->gpio.registered;
@@ -1129,11 +1122,6 @@ static inline void sm501_gpio_remove(struct sm501_devdata *sm)
 {
 }
 
-static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
-{
-	return -1;
-}
-
 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
 {
 	return 0;
@@ -1145,20 +1133,37 @@ static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
 {
 	struct i2c_gpio_platform_data *icd;
 	struct platform_device *pdev;
+	struct gpiod_lookup_table *lookup;
 
 	pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
 				   sizeof(struct i2c_gpio_platform_data));
 	if (!pdev)
 		return -ENOMEM;
 
-	icd = dev_get_platdata(&pdev->dev);
-
-	/* We keep the pin_sda and pin_scl fields relative in case the
-	 * same platform data is passed to >1 SM501.
-	 */
+	/* Create a gpiod lookup using gpiochip-local offsets */
+	lookup = devm_kzalloc(&pdev->dev,
+			      sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
+			      GFP_KERNEL);
+	lookup->dev_id = "i2c-gpio";
+	if (iic->pin_sda < 32)
+		lookup->table[0].chip_label = "SM501-LOW";
+	else
+		lookup->table[0].chip_label = "SM501-HIGH";
+	lookup->table[0].chip_hwnum = iic->pin_sda % 32;
+	lookup->table[0].con_id = NULL;
+	lookup->table[0].idx = 0;
+	lookup->table[0].flags = GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN;
+	if (iic->pin_scl < 32)
+		lookup->table[1].chip_label = "SM501-LOW";
+	else
+		lookup->table[1].chip_label = "SM501-HIGH";
+	lookup->table[1].chip_hwnum = iic->pin_scl % 32;
+	lookup->table[1].con_id = NULL;
+	lookup->table[1].idx = 1;
+	lookup->table[1].flags = GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN;
+	gpiod_add_lookup_table(lookup);
 
-	icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
-	icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
+	icd = dev_get_platdata(&pdev->dev);
 	icd->timeout = iic->timeout;
 	icd->udelay = iic->udelay;
 
@@ -1170,9 +1175,9 @@ static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
 
 	pdev->id = iic->bus_num;
 
-	dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
+	dev_info(sm->dev, "registering i2c-%d: sda=%d, scl=%d\n",
 		 iic->bus_num,
-		 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
+		 iic->pin_sda, iic->pin_scl);
 
 	return sm501_register_device(sm, pdev);
 }
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 8f702fcbe485..5f72a49d1aa3 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -28,6 +28,7 @@ struct gpio_descs {
 #define GPIOD_FLAGS_BIT_DIR_SET		BIT(0)
 #define GPIOD_FLAGS_BIT_DIR_OUT		BIT(1)
 #define GPIOD_FLAGS_BIT_DIR_VAL		BIT(2)
+#define GPIOD_FLAGS_BIT_OPEN_DRAIN	BIT(3)
 
 /**
  * Optional flags that can be passed to one of gpiod_* to configure direction
@@ -39,6 +40,11 @@ enum gpiod_flags {
 	GPIOD_OUT_LOW	= GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
 	GPIOD_OUT_HIGH	= GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
 			  GPIOD_FLAGS_BIT_DIR_VAL,
+	GPIOD_OUT_LOW_OPEN_DRAIN = GPIOD_FLAGS_BIT_DIR_SET |
+			  GPIOD_FLAGS_BIT_DIR_OUT | GPIOD_FLAGS_BIT_OPEN_DRAIN,
+	GPIOD_OUT_HIGH_OPEN_DRAIN = GPIOD_FLAGS_BIT_DIR_SET |
+			  GPIOD_FLAGS_BIT_DIR_OUT | GPIOD_FLAGS_BIT_DIR_VAL |
+			  GPIOD_FLAGS_BIT_OPEN_DRAIN,
 };
 
 #ifdef CONFIG_GPIOLIB
diff --git a/include/linux/i2c-gpio.h b/include/linux/i2c-gpio.h
index c1bcb1f1d73b..352c1426fd4d 100644
--- a/include/linux/i2c-gpio.h
+++ b/include/linux/i2c-gpio.h
@@ -12,8 +12,6 @@
 
 /**
  * struct i2c_gpio_platform_data - Platform-dependent data for i2c-gpio
- * @sda_pin: GPIO pin ID to use for SDA
- * @scl_pin: GPIO pin ID to use for SCL
  * @udelay: signal toggle delay. SCL frequency is (500 / udelay) kHz
  * @timeout: clock stretching timeout in jiffies. If the slave keeps
  *	SCL low for longer than this, the transfer will time out.
@@ -26,8 +24,6 @@
  * @scl_is_output_only: SCL output drivers cannot be turned off.
  */
 struct i2c_gpio_platform_data {
-	unsigned int	sda_pin;
-	unsigned int	scl_pin;
 	int		udelay;
 	int		timeout;
 	unsigned int	sda_is_open_drain:1;