gpio: davinci: drop platform data support

There are no more any board files that use the platform data for
gpio-davinci. We can remove the header defining it and port the code to
no longer store any context in pdata.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240819151705.37258-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

drivers/gpio/gpio-davinci.c

@@ -18,7 +18,6 @@
 #include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
-#include <linux/platform_data/gpio-davinci.h>
 #include <linux/property.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/spinlock.h>
@@ -154,74 +153,37 @@ davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 		       value ? &g->set_data : &g->clr_data);
 }
 
-static struct davinci_gpio_platform_data *
-davinci_gpio_get_pdata(struct platform_device *pdev)
-{
-	struct device_node *dn = pdev->dev.of_node;
-	struct davinci_gpio_platform_data *pdata;
-	int ret;
-	u32 val;
-
-	if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
-		return dev_get_platdata(&pdev->dev);
-
-	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return NULL;
-
-	ret = of_property_read_u32(dn, "ti,ngpio", &val);
-	if (ret)
-		goto of_err;
-
-	pdata->ngpio = val;
-
-	ret = of_property_read_u32(dn, "ti,davinci-gpio-unbanked", &val);
-	if (ret)
-		goto of_err;
-
-	pdata->gpio_unbanked = val;
-
-	return pdata;
-
-of_err:
-	dev_err(&pdev->dev, "Populating pdata from DT failed: err %d\n", ret);
-	return NULL;
-}
-
 static int davinci_gpio_probe(struct platform_device *pdev)
 {
 	int bank, i, ret = 0;
-	unsigned int ngpio, nbank, nirq;
+	unsigned int ngpio, nbank, nirq, gpio_unbanked;
 	struct davinci_gpio_controller *chips;
-	struct davinci_gpio_platform_data *pdata;
 	struct device *dev = &pdev->dev;
-
-	pdata = davinci_gpio_get_pdata(pdev);
-	if (!pdata) {
-		dev_err(dev, "No platform data found\n");
-		return -EINVAL;
-	}
-
-	dev->platform_data = pdata;
+	struct device_node *dn = dev_of_node(dev);
 
 	/*
 	 * The gpio banks conceptually expose a segmented bitmap,
 	 * and "ngpio" is one more than the largest zero-based
 	 * bit index that's valid.
 	 */
-	ngpio = pdata->ngpio;
-	if (ngpio == 0) {
-		dev_err(dev, "How many GPIOs?\n");
-		return -EINVAL;
-	}
+	ret = of_property_read_u32(dn, "ti,ngpio", &ngpio);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get the number of GPIOs\n");
+	if (ngpio == 0)
+		return dev_err_probe(dev, -EINVAL, "How many GPIOs?\n");
 
 	/*
 	 * If there are unbanked interrupts then the number of
 	 * interrupts is equal to number of gpios else all are banked so
 	 * number of interrupts is equal to number of banks(each with 16 gpios)
 	 */
-	if (pdata->gpio_unbanked)
-		nirq = pdata->gpio_unbanked;
+	ret = of_property_read_u32(dn, "ti,davinci-gpio-unbanked",
+				   &gpio_unbanked);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get the unbanked GPIOs property\n");
+
+	if (gpio_unbanked)
+		nirq = gpio_unbanked;
 	else
 		nirq = DIV_ROUND_UP(ngpio, 16);
 
@@ -252,7 +214,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
 	chips->chip.set = davinci_gpio_set;
 
 	chips->chip.ngpio = ngpio;
-	chips->chip.base = pdata->no_auto_base ? pdata->base : -1;
+	chips->chip.base = -1;
 
 #ifdef CONFIG_OF_GPIO
 	chips->chip.parent = dev;
@@ -261,6 +223,8 @@ static int davinci_gpio_probe(struct platform_device *pdev)
 #endif
 	spin_lock_init(&chips->lock);
 
+	chips->gpio_unbanked = gpio_unbanked;
+
 	nbank = DIV_ROUND_UP(ngpio, 32);
 	for (bank = 0; bank < nbank; bank++)
 		chips->regs[bank] = gpio_base + offset_array[bank];
@@ -488,7 +452,6 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	unsigned	ngpio;
 	struct device *dev = &pdev->dev;
 	struct davinci_gpio_controller *chips = platform_get_drvdata(pdev);
-	struct davinci_gpio_platform_data *pdata = dev->platform_data;
 	struct davinci_gpio_regs __iomem *g;
 	struct irq_domain	*irq_domain = NULL;
 	struct irq_chip *irq_chip;
@@ -502,7 +465,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	if (dev->of_node)
 		gpio_get_irq_chip = (gpio_get_irq_chip_cb_t)device_get_match_data(dev);
 
-	ngpio = pdata->ngpio;
+	ngpio = chips->chip.ngpio;
 
 	clk = devm_clk_get(dev, "gpio");
 	if (IS_ERR(clk)) {
@@ -514,7 +477,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (!pdata->gpio_unbanked) {
+	if (chips->gpio_unbanked) {
 		irq = devm_irq_alloc_descs(dev, -1, 0, ngpio, 0);
 		if (irq < 0) {
 			dev_err(dev, "Couldn't allocate IRQ numbers\n");
@@ -546,11 +509,11 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	 * controller only handling trigger modes.  We currently assume no
 	 * IRQ mux conflicts; gpio_irq_type_unbanked() is only for GPIOs.
 	 */
-	if (pdata->gpio_unbanked) {
+	if (chips->gpio_unbanked) {
 		/* pass "bank 0" GPIO IRQs to AINTC */
 		chips->chip.to_irq = gpio_to_irq_unbanked;
-		chips->gpio_unbanked = pdata->gpio_unbanked;
-		binten = GENMASK(pdata->gpio_unbanked / 16, 0);
+
+		binten = GENMASK(chips->gpio_unbanked / 16, 0);
 
 		/* AINTC handles mask/unmask; GPIO handles triggering */
 		irq = chips->irqs[0];
@@ -564,7 +527,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 		writel_relaxed(~0, &g->set_rising);
 
 		/* set the direct IRQs up to use that irqchip */
-		for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++) {
+		for (gpio = 0; gpio < chips->gpio_unbanked; gpio++) {
 			irq_set_chip(chips->irqs[gpio], irq_chip);
 			irq_set_handler_data(chips->irqs[gpio], chips);
 			irq_set_status_flags(chips->irqs[gpio],
@@ -675,8 +638,7 @@ static void davinci_gpio_restore_context(struct davinci_gpio_controller *chips,
 static int davinci_gpio_suspend(struct device *dev)
 {
 	struct davinci_gpio_controller *chips = dev_get_drvdata(dev);
-	struct davinci_gpio_platform_data *pdata = dev_get_platdata(dev);
-	u32 nbank = DIV_ROUND_UP(pdata->ngpio, 32);
+	u32 nbank = DIV_ROUND_UP(chips->chip.ngpio, 32);
 
 	davinci_gpio_save_context(chips, nbank);
 
@@ -686,8 +648,7 @@ static int davinci_gpio_suspend(struct device *dev)
 static int davinci_gpio_resume(struct device *dev)
 {
 	struct davinci_gpio_controller *chips = dev_get_drvdata(dev);
-	struct davinci_gpio_platform_data *pdata = dev_get_platdata(dev);
-	u32 nbank = DIV_ROUND_UP(pdata->ngpio, 32);
+	u32 nbank = DIV_ROUND_UP(chips->chip.ngpio, 32);
 
 	davinci_gpio_restore_context(chips, nbank);