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mfd: stmpe: Switch to using gpiod API

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This patch switches the driver away from legacy gpio/of_gpio API to
gpiod API, and removes use of of_get_named_gpio_flags() which I want to
make private to gpiolib.

We also need to patch relevant DTS files, as the original code relied on
the fact that of_get_named_gpio_flags() would fetch any data encoded in
GPIO flags, even if it does not reflect valid flags for a GPIO.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/YxeS1BK2OBH1P/kO@google.com
This commit is contained in:
Dmitry Torokhov 2022-09-06 11:35:00 -07:00 committed by Lee Jones
parent 62a0261c9f
commit ac3e91199d
4 changed files with 16 additions and 26 deletions
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2
arch/arm/boot/dts/tegra30-apalis-v1.1.dtsi
View File

@ -993,7 +993,7 @@
touchscreen@41 {
compatible = "st,stmpe811";
reg = <0x41>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) IRQ_TYPE_LEVEL_LOW>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) GPIO_ACTIVE_LOW>;
interrupt-controller;
id = <0>;
blocks = <0x5>;

2
arch/arm/boot/dts/tegra30-apalis.dtsi
View File

@ -976,7 +976,7 @@
touchscreen@41 {
compatible = "st,stmpe811";
reg = <0x41>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) IRQ_TYPE_LEVEL_LOW>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) GPIO_ACTIVE_LOW>;
interrupt-controller;
id = <0>;
blocks = <0x5>;

2
arch/arm/boot/dts/tegra30-colibri.dtsi
View File

@ -849,7 +849,7 @@
touchscreen@41 {
compatible = "st,stmpe811";
reg = <0x41>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) IRQ_TYPE_LEVEL_LOW>;
irq-gpio = <&gpio TEGRA_GPIO(V, 0) GPIO_ACTIVE_LOW>;
interrupt-controller;
id = <0>;
blocks = <0x5>;

36
drivers/mfd/stmpe.c
View File

@ -8,14 +8,13 @@
*/
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/mfd/core.h>
@ -30,17 +29,12 @@
* @irq_trigger: IRQ trigger to use for the interrupt to the host
* @autosleep: bool to enable/disable stmpe autosleep
* @autosleep_timeout: inactivity timeout in milliseconds for autosleep
* @irq_over_gpio: true if gpio is used to get irq
* @irq_gpio: gpio number over which irq will be requested (significant only if
* irq_over_gpio is true)
*/
struct stmpe_platform_data {
int id;
unsigned int blocks;
unsigned int irq_trigger;
bool autosleep;
bool irq_over_gpio;
int irq_gpio;
int autosleep_timeout;
};
@ -1349,13 +1343,6 @@ static void stmpe_of_probe(struct stmpe_platform_data *pdata,
if (pdata->id < 0)
pdata->id = -1;
pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
&pdata->irq_trigger);
if (gpio_is_valid(pdata->irq_gpio))
pdata->irq_over_gpio = 1;
else
pdata->irq_trigger = IRQF_TRIGGER_NONE;
of_property_read_u32(np, "st,autosleep-timeout",
&pdata->autosleep_timeout);
@ -1381,6 +1368,7 @@ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
struct stmpe_platform_data *pdata;
struct device_node *np = ci->dev->of_node;
struct stmpe *stmpe;
struct gpio_desc *irq_gpio;
int ret;
u32 val;
@ -1434,18 +1422,20 @@ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
if (ci->init)
ci->init(stmpe);
if (pdata->irq_over_gpio) {
ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
GPIOF_DIR_IN, "stmpe");
if (ret) {
dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
ret);
return ret;
}
irq_gpio = devm_gpiod_get_optional(ci->dev, "irq", GPIOD_ASIS);
ret = PTR_ERR_OR_ZERO(irq_gpio);
if (ret) {
dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", ret);
return ret;
}
stmpe->irq = gpio_to_irq(pdata->irq_gpio);
if (irq_gpio) {
stmpe->irq = gpiod_to_irq(irq_gpio);
pdata->irq_trigger = gpiod_is_active_low(irq_gpio) ?
IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH;
} else {
stmpe->irq = ci->irq;
pdata->irq_trigger = IRQF_TRIGGER_NONE;
}
if (stmpe->irq < 0) {