[ARM] 5201/1: PXA3xx: Add support for power i2c bus

Add power I2C support for PXA3xx processors

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 52 insertions, 2 deletions

diff --git a/arch/arm/mach-pxa/devices.h b/arch/arm/mach-pxa/devices.h
index 887c738f5911..bb04af4b0aa3 100644
--- a/arch/arm/mach-pxa/devices.h
+++ b/arch/arm/mach-pxa/devices.h
@@ -32,5 +32,6 @@ extern struct platform_device pxa27x_device_pwm0;
 extern struct platform_device pxa27x_device_pwm1;
 
 extern struct platform_device pxa3xx_device_nand;
+extern struct platform_device pxa3xx_device_i2c_power;
 
 void __init pxa_register_device(struct platform_device *dev, void *data);
diff --git a/arch/arm/mach-pxa/include/mach/i2c.h b/arch/arm/mach-pxa/include/mach/i2c.h
index 80596b013443..897e71752177 100644
--- a/arch/arm/mach-pxa/include/mach/i2c.h
+++ b/arch/arm/mach-pxa/include/mach/i2c.h
@@ -71,7 +71,11 @@ struct i2c_pxa_platform_data {
 extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
 
 #ifdef CONFIG_PXA27x
-extern void pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info);
+extern void pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info);
+#endif
+
+#ifdef CONFIG_PXA3xx
+extern void pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info);
 #endif
 
 #endif
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index f9f6a9c31f4b..c33cf6ac8c81 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -349,7 +349,7 @@ struct platform_device pxa27x_device_i2c_power = {
 	.num_resources	= ARRAY_SIZE(i2c_power_resources),
 };
 
-void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info)
+void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
 {
 	local_irq_disable();
 	PCFR |= PCFR_PI2CEN;
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 03cbc38103ed..b3cd5d0b0f35 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -203,6 +203,19 @@ static const struct clkops clk_pout_ops = {
 	.disable	= clk_pout_disable,
 };
 
+static void clk_dummy_enable(struct clk *clk)
+{
+}
+
+static void clk_dummy_disable(struct clk *clk)
+{
+}
+
+static const struct clkops clk_dummy_ops = {
+	.enable		= clk_dummy_enable,
+	.disable	= clk_dummy_disable,
+};
+
 static struct clk pxa3xx_clks[] = {
 	{
 		.name           = "CLK_POUT",
@@ -211,6 +224,13 @@ static struct clk pxa3xx_clks[] = {
 		.delay          = 70,
 	},
 
+	/* Power I2C clock is always on */
+	{
+		.name		= "I2CCLK",
+		.ops		= &clk_dummy_ops,
+		.dev		= &pxa3xx_device_i2c_power.dev,
+	},
+
 	PXA3xx_CK("LCDCLK",  LCD,    &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
 	PXA3xx_CK("CAMCLK",  CAMERA, &clk_pxa3xx_hsio_ops, NULL),
 	PXA3xx_CK("AC97CLK", AC97,   &clk_pxa3xx_ac97_ops, NULL),
@@ -509,6 +529,30 @@ void __init pxa3xx_init_irq(void)
  * device registration specific to PXA3xx.
  */
 
+static struct resource i2c_power_resources[] = {
+	{
+		.start  = 0x40f500c0,
+		.end    = 0x40f500d3,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= IRQ_PWRI2C,
+		.end	= IRQ_PWRI2C,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device pxa3xx_device_i2c_power = {
+	.name		= "pxa2xx-i2c",
+	.id		= 1,
+	.resource	= i2c_power_resources,
+	.num_resources	= ARRAY_SIZE(i2c_power_resources),
+};
+
+void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info)
+{
+	pxa3xx_device_i2c_power.dev.platform_data = info;
+}
+
 static struct platform_device *devices[] __initdata = {
 /*	&pxa_device_udc,	The UDC driver is PXA25x only */
 	&pxa_device_ffuart,
@@ -522,6 +566,7 @@ static struct platform_device *devices[] __initdata = {
 	&pxa3xx_device_ssp4,
 	&pxa27x_device_pwm0,
 	&pxa27x_device_pwm1,
+	&pxa3xx_device_i2c_power,
 };
 
 static struct sys_device pxa3xx_sysdev[] = {