MIPS: ath79: Move the GPIO driver to drivers/gpio
GPIO drivers should be in drivers/gpio
Signed-off-by: Alban Bedel <albeu@free.fr>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10597/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index f82cd67..2b64f61 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -20,6 +20,7 @@
obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o
obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
+obj-$(CONFIG_ATH79) += gpio-ath79.o
obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o
obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
new file mode 100644
index 0000000..c3c92eb
--- /dev/null
+++ b/drivers/gpio/gpio-ath79.c
@@ -0,0 +1,236 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X GPIO API support
+ *
+ * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/gpio.h>
+#include <linux/platform_data/gpio-ath79.h>
+#include <linux/of_device.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+static void __iomem *ath79_gpio_base;
+static u32 ath79_gpio_count;
+static DEFINE_SPINLOCK(ath79_gpio_lock);
+
+static void __ath79_gpio_set_value(unsigned gpio, int value)
+{
+ void __iomem *base = ath79_gpio_base;
+
+ if (value)
+ __raw_writel(1 << gpio, base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(1 << gpio, base + AR71XX_GPIO_REG_CLEAR);
+}
+
+static int __ath79_gpio_get_value(unsigned gpio)
+{
+ return (__raw_readl(ath79_gpio_base + AR71XX_GPIO_REG_IN) >> gpio) & 1;
+}
+
+static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned offset)
+{
+ return __ath79_gpio_get_value(offset);
+}
+
+static void ath79_gpio_set_value(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ __ath79_gpio_set_value(offset, value);
+}
+
+static int ath79_gpio_direction_input(struct gpio_chip *chip,
+ unsigned offset)
+{
+ void __iomem *base = ath79_gpio_base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+ __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset),
+ base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+
+ return 0;
+}
+
+static int ath79_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ void __iomem *base = ath79_gpio_base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+ if (value)
+ __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR);
+
+ __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset),
+ base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+
+ return 0;
+}
+
+static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ void __iomem *base = ath79_gpio_base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+ __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset),
+ base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+
+ return 0;
+}
+
+static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ void __iomem *base = ath79_gpio_base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+ if (value)
+ __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET);
+ else
+ __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR);
+
+ __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset),
+ base + AR71XX_GPIO_REG_OE);
+
+ spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+
+ return 0;
+}
+
+static struct gpio_chip ath79_gpio_chip = {
+ .label = "ath79",
+ .get = ath79_gpio_get_value,
+ .set = ath79_gpio_set_value,
+ .direction_input = ath79_gpio_direction_input,
+ .direction_output = ath79_gpio_direction_output,
+ .base = 0,
+};
+
+static const struct of_device_id ath79_gpio_of_match[] = {
+ { .compatible = "qca,ar7100-gpio" },
+ { .compatible = "qca,ar9340-gpio" },
+ {},
+};
+
+static int ath79_gpio_probe(struct platform_device *pdev)
+{
+ struct ath79_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+ bool oe_inverted;
+ int err;
+
+ if (np) {
+ err = of_property_read_u32(np, "ngpios", &ath79_gpio_count);
+ if (err) {
+ dev_err(&pdev->dev, "ngpios property is not valid\n");
+ return err;
+ }
+ if (ath79_gpio_count >= 32) {
+ dev_err(&pdev->dev, "ngpios must be less than 32\n");
+ return -EINVAL;
+ }
+ oe_inverted = of_device_is_compatible(np, "qca,ar9340-gpio");
+ } else if (pdata) {
+ ath79_gpio_count = pdata->ngpios;
+ oe_inverted = pdata->oe_inverted;
+ } else {
+ dev_err(&pdev->dev, "No DT node or platform data found\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ath79_gpio_base = devm_ioremap_nocache(
+ &pdev->dev, res->start, resource_size(res));
+ if (!ath79_gpio_base)
+ return -ENOMEM;
+
+ ath79_gpio_chip.dev = &pdev->dev;
+ ath79_gpio_chip.ngpio = ath79_gpio_count;
+ if (oe_inverted) {
+ ath79_gpio_chip.direction_input = ar934x_gpio_direction_input;
+ ath79_gpio_chip.direction_output = ar934x_gpio_direction_output;
+ }
+
+ err = gpiochip_add(&ath79_gpio_chip);
+ if (err) {
+ dev_err(&pdev->dev,
+ "cannot add AR71xx GPIO chip, error=%d", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static struct platform_driver ath79_gpio_driver = {
+ .driver = {
+ .name = "ath79-gpio",
+ .of_match_table = ath79_gpio_of_match,
+ },
+ .probe = ath79_gpio_probe,
+};
+
+module_platform_driver(ath79_gpio_driver);
+
+int gpio_get_value(unsigned gpio)
+{
+ if (gpio < ath79_gpio_count)
+ return __ath79_gpio_get_value(gpio);
+
+ return __gpio_get_value(gpio);
+}
+EXPORT_SYMBOL(gpio_get_value);
+
+void gpio_set_value(unsigned gpio, int value)
+{
+ if (gpio < ath79_gpio_count)
+ __ath79_gpio_set_value(gpio, value);
+ else
+ __gpio_set_value(gpio, value);
+}
+EXPORT_SYMBOL(gpio_set_value);
+
+int gpio_to_irq(unsigned gpio)
+{
+ /* FIXME */
+ return -EINVAL;
+}
+EXPORT_SYMBOL(gpio_to_irq);
+
+int irq_to_gpio(unsigned irq)
+{
+ /* FIXME */
+ return -EINVAL;
+}
+EXPORT_SYMBOL(irq_to_gpio);