gpio: stmpe: enforce device tree only mode

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@linaro.org>

drivers/gpio/Kconfig

@@ -644,6 +644,7 @@ 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

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];
@@ -340,13 +340,10 @@ 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);
@@ -360,19 +357,14 @@ 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,
@@ -414,9 +406,6 @@ 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;
@@ -433,15 +422,9 @@ 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;

include/linux/mfd/stmpe.h

@@ -117,20 +117,6 @@ 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
@@ -182,7 +168,6 @@ 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 {
@@ -194,7 +179,6 @@ struct stmpe_platform_data {
 	int irq_gpio;
 	int autosleep_timeout;
 
-	struct stmpe_gpio_platform_data *gpio;
 	struct stmpe_ts_platform_data *ts;
 };