[PATCH 07/13] ARM: clps711x: Add GPIO driver
Alexander Shiyan
shc_work at mail.ru
Mon Mar 11 05:26:37 EDT 2013
This patch adds support for CLPS711X GPIOs. Driver based on
generic GPIO driver.
Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
arch/arm/Kconfig | 1 +
arch/arm/mach-clps711x/devices.c | 82 ++++++++++++++++++++++++++++
arch/arm/mach-clps711x/include/mach/gpio.h | 3 +
drivers/gpio/Kconfig | 7 +++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-clps711x.c | 70 ++++++++++++++++++++++++
6 files changed, 164 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-clps711x/include/mach/gpio.h
create mode 100644 drivers/gpio/gpio-clps711x.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6463746..ed0b453 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -42,6 +42,7 @@ config ARCH_CLPS711X
select CLOCKSOURCE_CLPS711X
select COMMON_CLK
select CPU_32v4T
+ select GPIOLIB
config ARCH_EP93XX
bool "Cirrus Logic EP93xx"
diff --git a/arch/arm/mach-clps711x/devices.c b/arch/arm/mach-clps711x/devices.c
index 6221da3..f94b584 100644
--- a/arch/arm/mach-clps711x/devices.c
+++ b/arch/arm/mach-clps711x/devices.c
@@ -111,3 +111,85 @@ void clps711x_add_uart(unsigned int id)
break;
}
}
+
+static struct resource gpio0_resources[] = {
+ {
+ .start = PADR,
+ .end = PADR,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = PADDR,
+ .end = PADDR,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct resource gpio1_resources[] = {
+ {
+ .start = PBDR,
+ .end = PBDR,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = PBDDR,
+ .end = PBDDR,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct resource gpio2_resources[] = {
+ {
+ .start = PCDR,
+ .end = PCDR,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = PCDDR,
+ .end = PCDDR,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct resource gpio3_resources[] = {
+ {
+ .start = PDDR,
+ .end = PDDR,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = PDDDR,
+ .end = PDDDR,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct resource gpio4_resources[] = {
+ {
+ .start = PEDR,
+ .end = PEDR,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = PEDDR,
+ .end = PEDDR,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static __init int clps711x_gpio_init(void)
+{
+ add_generic_device_res("clps711x-gpio", 0, gpio0_resources,
+ ARRAY_SIZE(gpio0_resources), NULL);
+ add_generic_device_res("clps711x-gpio", 1, gpio1_resources,
+ ARRAY_SIZE(gpio1_resources), NULL);
+ add_generic_device_res("clps711x-gpio", 2, gpio2_resources,
+ ARRAY_SIZE(gpio2_resources), NULL);
+ add_generic_device_res("clps711x-gpio", 3, gpio3_resources,
+ ARRAY_SIZE(gpio3_resources), NULL);
+ add_generic_device_res("clps711x-gpio", 4, gpio4_resources,
+ ARRAY_SIZE(gpio4_resources), NULL);
+
+ return 0;
+}
+coredevice_initcall(clps711x_gpio_init);
diff --git a/arch/arm/mach-clps711x/include/mach/gpio.h b/arch/arm/mach-clps711x/include/mach/gpio.h
new file mode 100644
index 0000000..3428fe5
--- /dev/null
+++ b/arch/arm/mach-clps711x/include/mach/gpio.h
@@ -0,0 +1,3 @@
+#include <asm-generic/gpio.h>
+
+#define CLPS711X_GPIO(prt,bit) ((prt) * 8 + (bit))
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 895eb68..ea07028 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -13,6 +13,13 @@ config GPIO_BCM2835
bool "GPIO support for BCM2835"
depends on ARCH_BCM2835
+config GPIO_CLPS711X
+ bool "GPIO support for CLPS711X"
+ depends on ARCH_CLPS711X
+ select GPIO_GENERIC
+ help
+ Say yes here to enable the GPIO driver for the CLPS711X CPUs
+
config GPIO_GENERIC_PLATFORM
bool "Generic memory-mapped GPIO controller support"
select GPIO_GENERIC
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 1ef345c..00acb68 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_GPIOLIB) += gpio.o
obj-$(CONFIG_GPIO_BCM2835) += gpio-bcm2835.o
+obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o
obj-$(CONFIG_GPIO_PL061) += gpio-pl061.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c
new file mode 100644
index 0000000..feead51
--- /dev/null
+++ b/drivers/gpio/gpio-clps711x.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2013 Alexander Shiyan <shc_work at mail.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <init.h>
+#include <common.h>
+#include <malloc.h>
+
+#include <linux/basic_mmio_gpio.h>
+
+static int clps711x_gpio_probe(struct device_d *dev)
+{
+ int err;
+ void __iomem *dat, *dir = NULL, *dir_inv = NULL;
+ struct bgpio_chip *bgc;
+
+ if ((dev->id < 0) || (dev->id > 4))
+ return -ENODEV;
+
+ dat = dev_request_mem_region(dev, 0);
+ switch (dev->id) {
+ case 3:
+ dir_inv = dev_request_mem_region(dev, 1);
+ break;
+ default:
+ dir = dev_request_mem_region(dev, 1);
+ break;
+ }
+
+ if (!dat || (!dir && !dir_inv))
+ return -EINVAL;
+
+ bgc = xzalloc(sizeof(struct bgpio_chip));
+ if (!bgc)
+ return -ENOMEM;
+
+ err = bgpio_init(bgc, dev, 1, dat, NULL, NULL, dir, dir_inv, 0);
+ if (err) {
+ free(bgc);
+ return err;
+ }
+
+ bgc->gc.base = dev->id * 8;
+ switch (dev->id) {
+ case 4:
+ bgc->gc.ngpio = 3;
+ break;
+ default:
+ bgc->gc.ngpio = 8;
+ break;
+ }
+
+ return gpiochip_add(&bgc->gc);
+}
+
+static struct driver_d clps711x_gpio_driver = {
+ .name = "clps711x-gpio",
+ .probe = clps711x_gpio_probe,
+};
+
+static __init int clps711x_gpio_register(void)
+{
+ return platform_driver_register(&clps711x_gpio_driver);
+}
+coredevice_initcall(clps711x_gpio_register);
--
1.7.3.4
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