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Message-ID: <20150118164609.GA3574@x1>
Date: Sun, 18 Jan 2015 16:46:10 +0000
From: Lee Jones <lee.jones@...aro.org>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org
Subject: Re: [PATCH] gpio: stmpe: enforce device tree only mode
On Tue, 13 Jan 2015, Linus Walleij wrote:
> Require that device tree be used with STMPE (all platforms use this)
> and enforce OF_GPIO, then delete the platform data.
>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> MFD: folks: please ACK this so I can funnel it through the GPIO
> tree.
> ---
> drivers/gpio/Kconfig | 1 +
> drivers/gpio/gpio-stmpe.c | 23 +++--------------------
> include/linux/mfd/stmpe.h | 16 ----------------
Acked-by: Lee Jones <lee.jones@...aro.org>
> 3 files changed, 4 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 633ec216e185..5b1821daa1bd 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -624,6 +624,7 @@ config GPIO_SX150X
> config GPIO_STMPE
> bool "STMPE GPIOs"
> depends on MFD_STMPE
> + depends on OF_GPIO
> select GPIOLIB_IRQCHIP
> help
> This enables support for the GPIOs found on the STMPE I/O
> diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
> index 359536eaca0d..926502145492 100644
> --- a/drivers/gpio/gpio-stmpe.c
> +++ b/drivers/gpio/gpio-stmpe.c
> @@ -30,7 +30,7 @@ struct stmpe_gpio {
> struct stmpe *stmpe;
> struct device *dev;
> struct mutex irq_lock;
> - unsigned norequest_mask;
> + u32 norequest_mask;
> /* Caches of interrupt control registers for bus_lock */
> u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
> u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS];
> @@ -350,13 +350,10 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
> {
> struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
> struct device_node *np = pdev->dev.of_node;
> - struct stmpe_gpio_platform_data *pdata;
> struct stmpe_gpio *stmpe_gpio;
> int ret;
> int irq = 0;
>
> - pdata = stmpe->pdata->gpio;
> -
> irq = platform_get_irq(pdev, 0);
>
> stmpe_gpio = kzalloc(sizeof(struct stmpe_gpio), GFP_KERNEL);
> @@ -370,19 +367,14 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
> stmpe_gpio->chip = template_chip;
> stmpe_gpio->chip.ngpio = stmpe->num_gpios;
> stmpe_gpio->chip.dev = &pdev->dev;
> -#ifdef CONFIG_OF
> stmpe_gpio->chip.of_node = np;
> -#endif
> stmpe_gpio->chip.base = -1;
>
> if (IS_ENABLED(CONFIG_DEBUG_FS))
> stmpe_gpio->chip.dbg_show = stmpe_dbg_show;
>
> - if (pdata)
> - stmpe_gpio->norequest_mask = pdata->norequest_mask;
> - else if (np)
> - of_property_read_u32(np, "st,norequest-mask",
> - &stmpe_gpio->norequest_mask);
> + of_property_read_u32(np, "st,norequest-mask",
> + &stmpe_gpio->norequest_mask);
>
> if (irq < 0)
> dev_info(&pdev->dev,
> @@ -424,9 +416,6 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
> NULL);
> }
>
> - if (pdata && pdata->setup)
> - pdata->setup(stmpe, stmpe_gpio->chip.base);
> -
> platform_set_drvdata(pdev, stmpe_gpio);
>
> return 0;
> @@ -443,15 +432,9 @@ static int stmpe_gpio_remove(struct platform_device *pdev)
> {
> struct stmpe_gpio *stmpe_gpio = platform_get_drvdata(pdev);
> struct stmpe *stmpe = stmpe_gpio->stmpe;
> - struct stmpe_gpio_platform_data *pdata = stmpe->pdata->gpio;
> -
> - if (pdata && pdata->remove)
> - pdata->remove(stmpe, stmpe_gpio->chip.base);
>
> gpiochip_remove(&stmpe_gpio->chip);
> -
> stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
> -
> kfree(stmpe_gpio);
>
> return 0;
> diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
> index dd908fea8c5b..23a9722c8176 100644
> --- a/include/linux/mfd/stmpe.h
> +++ b/include/linux/mfd/stmpe.h
> @@ -119,20 +119,6 @@ extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
> #define STMPE_GPIO_NOREQ_811_TOUCH (0xf0)
>
> /**
> - * struct stmpe_gpio_platform_data - STMPE GPIO platform data
> - * @norequest_mask: bitmask specifying which GPIOs should _not_ be
> - * requestable due to different usage (e.g. touch, keypad)
> - * STMPE_GPIO_NOREQ_* macros can be used here.
> - * @setup: board specific setup callback.
> - * @remove: board specific remove callback
> - */
> -struct stmpe_gpio_platform_data {
> - unsigned norequest_mask;
> - void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
> - void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
> -};
> -
> -/**
> * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
> * data
> * @sample_time: ADC converstion time in number of clock.
> @@ -183,7 +169,6 @@ struct stmpe_ts_platform_data {
> * @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)
> - * @gpio: GPIO-specific platform data
> * @ts: touchscreen-specific platform data
> */
> struct stmpe_platform_data {
> @@ -195,7 +180,6 @@ struct stmpe_platform_data {
> int irq_gpio;
> int autosleep_timeout;
>
> - struct stmpe_gpio_platform_data *gpio;
> struct stmpe_ts_platform_data *ts;
> };
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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