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path: root/drivers/pinctrl/pinctrl-coh901.c
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Diffstat (limited to 'drivers/pinctrl/pinctrl-coh901.c')
-rw-r--r--drivers/pinctrl/pinctrl-coh901.c139
1 files changed, 88 insertions, 51 deletions
diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
index 69fb7072a23e..0797eba3e33a 100644
--- a/drivers/pinctrl/pinctrl-coh901.c
+++ b/drivers/pinctrl/pinctrl-coh901.c
@@ -22,38 +22,10 @@
#include <linux/gpio.h>
#include <linux/list.h>
#include <linux/slab.h>
-#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf-generic.h>
#include <mach/gpio-u300.h>
-
-/*
- * Bias modes for U300 GPIOs
- *
- * GPIO_U300_CONFIG_BIAS_UNKNOWN: this bias mode is not known to us
- * GPIO_U300_CONFIG_BIAS_FLOAT: no specific bias, the GPIO will float or state
- * is not controlled by software
- * GPIO_U300_CONFIG_BIAS_PULL_UP: the GPIO will be pulled up (usually with high
- * impedance to VDD)
- */
-#define GPIO_U300_CONFIG_BIAS_UNKNOWN 0x1000
-#define GPIO_U300_CONFIG_BIAS_FLOAT 0x1001
-#define GPIO_U300_CONFIG_BIAS_PULL_UP 0x1002
-
-/*
- * Drive modes for U300 GPIOs (output)
- *
- * GPIO_U300_CONFIG_DRIVE_PUSH_PULL: the GPIO will be driven actively high and
- * low, this is the most typical case and is typically achieved with two
- * active transistors on the output
- * GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: the GPIO will be driven with open drain
- * (open collector) which means it is usually wired with other output
- * ports which are then pulled up with an external resistor
- * GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: the GPIO will be driven with open drain
- * (open emitter) which is the same as open drain mutatis mutandis but
- * pulled to ground
- */
-#define GPIO_U300_CONFIG_DRIVE_PUSH_PULL 0x2000
-#define GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN 0x2001
-#define GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE 0x2002
+#include "pinctrl-coh901.h"
/*
* Register definitions for COH 901 335 variant
@@ -181,12 +153,12 @@ struct u300_gpio_confdata {
#define BS365_GPIO_NUM_PORTS 5
#define U300_FLOATING_INPUT { \
- .bias_mode = GPIO_U300_CONFIG_BIAS_FLOAT, \
+ .bias_mode = PIN_CONFIG_BIAS_HIGH_IMPEDANCE, \
.output = false, \
}
#define U300_PULL_UP_INPUT { \
- .bias_mode = GPIO_U300_CONFIG_BIAS_PULL_UP, \
+ .bias_mode = PIN_CONFIG_BIAS_PULL_UP, \
.output = false, \
}
@@ -360,14 +332,14 @@ static int u300_gpio_request(struct gpio_chip *chip, unsigned offset)
*/
int gpio = chip->base + offset;
- return pinmux_request_gpio(gpio);
+ return pinctrl_request_gpio(gpio);
}
static void u300_gpio_free(struct gpio_chip *chip, unsigned offset)
{
int gpio = chip->base + offset;
- pinmux_free_gpio(gpio);
+ pinctrl_free_gpio(gpio);
}
static int u300_gpio_get(struct gpio_chip *chip, unsigned offset)
@@ -448,8 +420,68 @@ static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
return retirq;
}
-static int u300_gpio_config(struct gpio_chip *chip, unsigned offset,
- u16 param, unsigned long *data)
+/* Returning -EINVAL means "supported but not available" */
+int u300_gpio_config_get(struct gpio_chip *chip,
+ unsigned offset,
+ unsigned long *config)
+{
+ struct u300_gpio *gpio = to_u300_gpio(chip);
+ enum pin_config_param param = (enum pin_config_param) *config;
+ bool biasmode;
+ u32 drmode;
+
+ /* One bit per pin, clamp to bool range */
+ biasmode = !!(readl(U300_PIN_REG(offset, per)) & U300_PIN_BIT(offset));
+
+ /* Mask out the two bits for this pin and shift to bits 0,1 */
+ drmode = readl(U300_PIN_REG(offset, pcr));
+ drmode &= (U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1));
+ drmode >>= ((offset & 0x07) << 1);
+
+ switch(param) {
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ *config = 0;
+ if (biasmode)
+ return 0;
+ else
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ *config = 0;
+ if (!biasmode)
+ return 0;
+ else
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ *config = 0;
+ if (drmode == U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL)
+ return 0;
+ else
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ *config = 0;
+ if (drmode == U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN)
+ return 0;
+ else
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+ *config = 0;
+ if (drmode == U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE)
+ return 0;
+ else
+ return -EINVAL;
+ break;
+ default:
+ break;
+ }
+ return -ENOTSUPP;
+}
+
+int u300_gpio_config_set(struct gpio_chip *chip, unsigned offset,
+ enum pin_config_param param)
{
struct u300_gpio *gpio = to_u300_gpio(chip);
unsigned long flags;
@@ -457,16 +489,16 @@ static int u300_gpio_config(struct gpio_chip *chip, unsigned offset,
local_irq_save(flags);
switch (param) {
- case GPIO_U300_CONFIG_BIAS_UNKNOWN:
- case GPIO_U300_CONFIG_BIAS_FLOAT:
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
val = readl(U300_PIN_REG(offset, per));
writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, per));
break;
- case GPIO_U300_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_UP:
val = readl(U300_PIN_REG(offset, per));
writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, per));
break;
- case GPIO_U300_CONFIG_DRIVE_PUSH_PULL:
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
val = readl(U300_PIN_REG(offset, pcr));
val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
<< ((offset & 0x07) << 1));
@@ -474,7 +506,7 @@ static int u300_gpio_config(struct gpio_chip *chip, unsigned offset,
<< ((offset & 0x07) << 1));
writel(val, U300_PIN_REG(offset, pcr));
break;
- case GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN:
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
val = readl(U300_PIN_REG(offset, pcr));
val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
<< ((offset & 0x07) << 1));
@@ -482,7 +514,7 @@ static int u300_gpio_config(struct gpio_chip *chip, unsigned offset,
<< ((offset & 0x07) << 1));
writel(val, U300_PIN_REG(offset, pcr));
break;
- case GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE:
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
val = readl(U300_PIN_REG(offset, pcr));
val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
<< ((offset & 0x07) << 1));
@@ -650,13 +682,12 @@ static void __init u300_gpio_init_pin(struct u300_gpio *gpio,
u300_gpio_direction_output(&gpio->chip, offset, conf->outval);
/* Deactivate bias mode for output */
- u300_gpio_config(&gpio->chip, offset,
- GPIO_U300_CONFIG_BIAS_FLOAT,
- NULL);
+ u300_gpio_config_set(&gpio->chip, offset,
+ PIN_CONFIG_BIAS_HIGH_IMPEDANCE);
/* Set drive mode for output */
- u300_gpio_config(&gpio->chip, offset,
- GPIO_U300_CONFIG_DRIVE_PUSH_PULL, NULL);
+ u300_gpio_config_set(&gpio->chip, offset,
+ PIN_CONFIG_DRIVE_PUSH_PULL);
dev_dbg(gpio->dev, "set up pin %d as output, value: %d\n",
offset, conf->outval);
@@ -667,7 +698,7 @@ static void __init u300_gpio_init_pin(struct u300_gpio *gpio,
u300_gpio_set(&gpio->chip, offset, 0);
/* Set bias mode for input */
- u300_gpio_config(&gpio->chip, offset, conf->bias_mode, NULL);
+ u300_gpio_config_set(&gpio->chip, offset, conf->bias_mode);
dev_dbg(gpio->dev, "set up pin %d as input, bias: %04x\n",
offset, conf->bias_mode);
@@ -705,7 +736,6 @@ static inline void u300_gpio_free_ports(struct u300_gpio *gpio)
list_for_each_safe(p, n, &gpio->port_list) {
port = list_entry(p, struct u300_gpio_port, node);
list_del(&port->node);
- free_irq(port->irq, port);
kfree(port);
}
}
@@ -861,10 +891,18 @@ static int __init u300_gpio_probe(struct platform_device *pdev)
goto err_no_chip;
}
+ /* Spawn pin controller device as child of the GPIO, pass gpio chip */
+ plat->pinctrl_device->dev.platform_data = &gpio->chip;
+ err = platform_device_register(plat->pinctrl_device);
+ if (err)
+ goto err_no_pinctrl;
+
platform_set_drvdata(pdev, gpio);
return 0;
+err_no_pinctrl:
+ err = gpiochip_remove(&gpio->chip);
err_no_chip:
err_no_port:
u300_gpio_free_ports(gpio);
@@ -919,7 +957,6 @@ static struct platform_driver u300_gpio_driver = {
.remove = __exit_p(u300_gpio_remove),
};
-
static int __init u300_gpio_init(void)
{
return platform_driver_probe(&u300_gpio_driver, u300_gpio_probe);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 07:30:36 +0300