[U-Boot] [PATCH v2 2/6] gpio: Add JZ47xx GPIO driver

[Ezequiel Garcia]

From: Paul Burton <paul.burton at imgtec.com>

Add primitive GPIO controller driver for the JZ47xx SoC.

Cc: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>
Signed-off-by: Paul Burton <paul.burton at imgtec.com>
Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
Reviewed-by: Marek Vasut <marex at denx.de>
---
 drivers/gpio/Kconfig       |  7 ++++
 drivers/gpio/Makefile      |  1 +
 drivers/gpio/gpio-jz47xx.c | 78 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+)
 create mode 100644 drivers/gpio/gpio-jz47xx.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 35344e57c6c6..46c161c99ce9 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -322,4 +322,11 @@ config MT7621_GPIO
 	help
 	  Say yes here to support MediaTek MT7621 compatible GPIOs.
 
+config JZ47XX_GPIO
+	bool "Ingenic JZ47xx GPIO driver"
+	depends on ARCH_JZ47XX
+	default y
+	help
+	  Supports GPIO access on Ingenic JZ47xx SoCs.
+
 endmenu
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 7ed9a4ec4221..92310e9ba934 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -59,3 +59,4 @@ obj-$(CONFIG_MSM_GPIO)		+= msm_gpio.o
 obj-$(CONFIG_$(SPL_)PCF8575_GPIO)	+= pcf8575_gpio.o
 obj-$(CONFIG_PM8916_GPIO)	+= pm8916_gpio.o
 obj-$(CONFIG_MT7621_GPIO)	+= mt7621_gpio.o
+obj-$(CONFIG_JZ47XX_GPIO)	+= gpio-jz47xx.o
diff --git a/drivers/gpio/gpio-jz47xx.c b/drivers/gpio/gpio-jz47xx.c
new file mode 100644
index 000000000000..565108192306
--- /dev/null
+++ b/drivers/gpio/gpio-jz47xx.c
@@ -0,0 +1,78 @@
+/*
+ * Ingenic JZ47xx GPIO
+ *
+ * Copyright (C) 2018 Marek Vasut <marek.vasut at gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <errno.h>
+#include <mach/jz4780.h>
+
+int gpio_get_value(unsigned gpio)
+{
+	void __iomem *gpio_regs = (void __iomem *)GPIO_BASE;
+	int port = gpio / 32;
+	int pin = gpio % 32;
+
+	return readl(gpio_regs + GPIO_PXPIN(port)) & BIT(pin);
+}
+
+int gpio_set_value(unsigned gpio, int value)
+{
+	void __iomem *gpio_regs = (void __iomem *)GPIO_BASE;
+	int port = gpio / 32;
+	int pin = gpio % 32;
+
+	if (value)
+		writel(BIT(pin), gpio_regs + GPIO_PXPAT0S(port));
+	else
+		writel(BIT(pin), gpio_regs + GPIO_PXPAT0C(port));
+
+	return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+	void __iomem *gpio_regs = (void __iomem *)GPIO_BASE;
+	int port = gpio / 32;
+	int pin = gpio % 32;
+
+	writel(BIT(pin), gpio_regs + GPIO_PXINTC(port));
+	writel(BIT(pin), gpio_regs + GPIO_PXMASKS(port));
+	writel(BIT(pin), gpio_regs + GPIO_PXPAT1S(port));
+
+	return 0;
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+	void __iomem *gpio_regs = (void __iomem *)GPIO_BASE;
+	int port = gpio / 32;
+	int pin = gpio % 32;
+
+	writel(BIT(pin), gpio_regs + GPIO_PXINTC(port));
+	writel(BIT(pin), gpio_regs + GPIO_PXMASKS(port));
+	writel(BIT(pin), gpio_regs + GPIO_PXPAT1C(port));
+
+	gpio_set_value(gpio, value);
+
+	return 0;
+}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+	int port = gpio / 32;
+
+	if (port >= 6)
+		return -EINVAL;
+
+	return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+	return 0;
+}
-- 
2.20.0.rc2