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-rw-r--r--drivers/pinctrl/Kconfig1
-rw-r--r--drivers/pinctrl/pinctrl-coh901.c77
-rw-r--r--drivers/pinctrl/pinctrl-coh901.h5
-rw-r--r--drivers/pinctrl/pinctrl-u300.c60
4 files changed, 135 insertions, 8 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 07f3d8d38580..abfb96408779 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -73,6 +73,7 @@ config PINCTRL_U300
bool "U300 pin controller driver"
depends on ARCH_U300
select PINMUX
+ select GENERIC_PINCONF
config PINCTRL_COH901
bool "ST-Ericsson U300 COH 901 335/571 GPIO"
diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
index 724234c9b01b..0797eba3e33a 100644
--- a/drivers/pinctrl/pinctrl-coh901.c
+++ b/drivers/pinctrl/pinctrl-coh901.c
@@ -23,7 +23,9 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf-generic.h>
#include <mach/gpio-u300.h>
+#include "pinctrl-coh901.h"
/*
* Register definitions for COH 901 335 variant
@@ -418,8 +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,
- enum pin_config_param 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;
@@ -620,13 +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,
- PIN_CONFIG_BIAS_HIGH_IMPEDANCE,
- 0);
+ u300_gpio_config_set(&gpio->chip, offset,
+ PIN_CONFIG_BIAS_HIGH_IMPEDANCE);
/* Set drive mode for output */
- u300_gpio_config(&gpio->chip, offset,
- PIN_CONFIG_DRIVE_PUSH_PULL, 0);
+ 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);
@@ -637,7 +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, 0);
+ 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);
diff --git a/drivers/pinctrl/pinctrl-coh901.h b/drivers/pinctrl/pinctrl-coh901.h
new file mode 100644
index 000000000000..87294222583e
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-coh901.h
@@ -0,0 +1,5 @@
+int u300_gpio_config_get(struct gpio_chip *chip,
+ unsigned offset,
+ unsigned long *config);
+int u300_gpio_config_set(struct gpio_chip *chip, unsigned offset,
+ enum pin_config_param param);
diff --git a/drivers/pinctrl/pinctrl-u300.c b/drivers/pinctrl/pinctrl-u300.c
index fc4a281caba5..26eb8ccd72d5 100644
--- a/drivers/pinctrl/pinctrl-u300.c
+++ b/drivers/pinctrl/pinctrl-u300.c
@@ -19,6 +19,9 @@
#include <linux/err.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include "pinctrl-coh901.h"
/*
* Register definitions for the U300 Padmux control registers in the
@@ -1044,12 +1047,69 @@ static struct pinctrl_gpio_range u300_gpio_ranges[] = {
U300_GPIO_RANGE(25, 181, 1),
};
+static struct pinctrl_gpio_range *u300_match_gpio_range(unsigned pin)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(u300_gpio_ranges); i++) {
+ struct pinctrl_gpio_range *range;
+
+ range = &u300_gpio_ranges[i];
+ if (pin >= range->pin_base &&
+ pin <= (range->pin_base + range->npins - 1))
+ return range;
+ }
+ return NULL;
+}
+
+int u300_pin_config_get(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long *config)
+{
+ struct pinctrl_gpio_range *range = u300_match_gpio_range(pin);
+
+ /* We get config for those pins we CAN get it for and that's it */
+ if (!range)
+ return -ENOTSUPP;
+
+ return u300_gpio_config_get(range->gc,
+ (pin - range->pin_base + range->base),
+ config);
+}
+
+int u300_pin_config_set(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long config)
+{
+ struct pinctrl_gpio_range *range = u300_match_gpio_range(pin);
+ int ret;
+
+ if (!range)
+ return -EINVAL;
+
+ /* Note: none of these configurations take any argument */
+ ret = u300_gpio_config_set(range->gc,
+ (pin - range->pin_base + range->base),
+ pinconf_to_config_param(config));
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static struct pinconf_ops u300_pconf_ops = {
+ .is_generic = true,
+ .pin_config_get = u300_pin_config_get,
+ .pin_config_set = u300_pin_config_set,
+};
+
static struct pinctrl_desc u300_pmx_desc = {
.name = DRIVER_NAME,
.pins = u300_pads,
.npins = ARRAY_SIZE(u300_pads),
.pctlops = &u300_pctrl_ops,
.pmxops = &u300_pmx_ops,
+ .confops = &u300_pconf_ops,
.owner = THIS_MODULE,
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.