diff options
author | Linus Walleij <linus.walleij@linaro.org> | 2023-05-01 11:05:21 +0200 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2023-05-24 15:01:55 +0200 |
commit | d5f4fa60d63aa54ae33339895b88d8932b6037ed (patch) | |
tree | 2212145423b10cbaf8a326e25bb8f1ae43b96aa7 /drivers/gpio/gpio-twl4030.c | |
parent | c729baa8604226a8f878296bd145ab4046c80b12 (diff) | |
download | linux-stable-d5f4fa60d63aa54ae33339895b88d8932b6037ed.tar.gz linux-stable-d5f4fa60d63aa54ae33339895b88d8932b6037ed.tar.bz2 linux-stable-d5f4fa60d63aa54ae33339895b88d8932b6037ed.zip |
ARM/gpio: Push OMAP2 quirk down into TWL4030 driver
The TWL4030 GPIO driver has a custom platform data .set_up()
callback to call back into the platform and do misc stuff such
as hog and export a GPIO for WLAN PWR on a specific OMAP3 board.
Avoid all the kludgery in the platform data and the boardfile
and just put the quirks right into the driver. Make it
conditional on OMAP3.
I think the exported GPIO is used by some kind of userspace
so ordinary DTS hogs will probably not work.
Fixes: 92bf78b33b0b ("gpio: omap: use dynamic allocation of base")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-twl4030.c')
-rw-r--r-- | drivers/gpio/gpio-twl4030.c | 52 |
1 files changed, 36 insertions, 16 deletions
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c index c1bb2c3ca6f2..446599ac234a 100644 --- a/drivers/gpio/gpio-twl4030.c +++ b/drivers/gpio/gpio-twl4030.c @@ -17,7 +17,9 @@ #include <linux/interrupt.h> #include <linux/kthread.h> #include <linux/irq.h> +#include <linux/gpio/machine.h> #include <linux/gpio/driver.h> +#include <linux/gpio/consumer.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/irqdomain.h> @@ -465,8 +467,7 @@ static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) REG_GPIO_DEBEN1, 3); } -static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev, - struct twl4030_gpio_platform_data *pdata) +static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev) { struct twl4030_gpio_platform_data *omap_twl_info; @@ -474,9 +475,6 @@ static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev, if (!omap_twl_info) return NULL; - if (pdata) - *omap_twl_info = *pdata; - omap_twl_info->use_leds = of_property_read_bool(dev->of_node, "ti,use-leds"); @@ -504,9 +502,18 @@ static int gpio_twl4030_remove(struct platform_device *pdev) return 0; } +/* Called from the registered devm action */ +static void gpio_twl4030_power_off_action(void *data) +{ + struct gpio_desc *d = data; + + gpiod_unexport(d); + gpiochip_free_own_desc(d); +} + static int gpio_twl4030_probe(struct platform_device *pdev) { - struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct twl4030_gpio_platform_data *pdata; struct device_node *node = pdev->dev.of_node; struct gpio_twl4030_priv *priv; int ret, irq_base; @@ -546,9 +553,7 @@ no_irqs: mutex_init(&priv->mutex); - if (node) - pdata = of_gpio_twl4030(&pdev->dev, pdata); - + pdata = of_gpio_twl4030(&pdev->dev); if (pdata == NULL) { dev_err(&pdev->dev, "Platform data is missing\n"); return -ENXIO; @@ -585,17 +590,32 @@ no_irqs: goto out; } - platform_set_drvdata(pdev, priv); + /* + * Special quirk for the OMAP3 to hog and export a WLAN power + * GPIO. + */ + if (IS_ENABLED(CONFIG_ARCH_OMAP3) && + of_machine_is_compatible("compulab,omap3-sbc-t3730")) { + struct gpio_desc *d; - if (pdata->setup) { - int status; + d = gpiochip_request_own_desc(&priv->gpio_chip, + 2, "wlan pwr", + GPIO_ACTIVE_HIGH, + GPIOD_OUT_HIGH); + if (IS_ERR(d)) + return dev_err_probe(&pdev->dev, PTR_ERR(d), + "unable to hog wlan pwr GPIO\n"); + + gpiod_export(d, 0); + + ret = devm_add_action_or_reset(&pdev->dev, gpio_twl4030_power_off_action, d); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to install power off handler\n"); - status = pdata->setup(&pdev->dev, priv->gpio_chip.base, - TWL4030_GPIO_MAX); - if (status) - dev_dbg(&pdev->dev, "setup --> %d\n", status); } + platform_set_drvdata(pdev, priv); out: return ret; } |