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authorFlorian Fainelli <florian@openwrt.org>2012-12-06 22:41:04 +0000
committerFlorian Fainelli <florian@openwrt.org>2012-12-06 22:41:04 +0000
commit849662a8ec51913e8a4416be65cf9a66dd658b8d (patch)
treebe2e22e7af86df04340ed80fe9a4f533c2e27c6a
parent78b235cfc378022d03b676c1ce7d18f4930f2643 (diff)
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add a gpiolib driver
Signed-off-by: Florian Fainelli <florian@openwrt.org> SVN-Revision: 34564
-rw-r--r--target/linux/adm8668/config-3.34
-rw-r--r--target/linux/adm8668/files/arch/mips/adm8668/gpio.c123
-rw-r--r--target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/gpio.h13
-rw-r--r--target/linux/adm8668/patches-3.3/001-adm8668_arch.patch5
4 files changed, 143 insertions, 2 deletions
diff --git a/target/linux/adm8668/config-3.3 b/target/linux/adm8668/config-3.3
index 169245d1cc..e63f14053c 100644
--- a/target/linux/adm8668/config-3.3
+++ b/target/linux/adm8668/config-3.3
@@ -2,6 +2,7 @@ CONFIG_ADM8668=y
CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y
CONFIG_ARCH_DISCARD_MEMBLOCK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARM_AMBA=y
# CONFIG_ARM_SP805_WATCHDOG is not set
@@ -31,8 +32,11 @@ CONFIG_GENERIC_ATOMIC64=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_GENERIC_CMOS_UPDATE=y
+CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
CONFIG_HARDWARE_WATCHPOINTS=y
CONFIG_HAS_DMA=y
CONFIG_HAS_IOMEM=y
diff --git a/target/linux/adm8668/files/arch/mips/adm8668/gpio.c b/target/linux/adm8668/files/arch/mips/adm8668/gpio.c
new file mode 100644
index 0000000000..fb39f7f588
--- /dev/null
+++ b/target/linux/adm8668/files/arch/mips/adm8668/gpio.c
@@ -0,0 +1,123 @@
+/*
+ * Infineon/ADMTek ADM8668 WildPass GPIO support
+ *
+ * Copyright (C) 2012 Florian Fainelli <florian@openwrt.org>
+ *
+ * Licensed under the terms of GPLv2.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#include <adm8668.h>
+
+#define GPIO_MASK 0x3f
+
+#define GPIO_IN_OFS 0
+#define GPIO_OUT_OFS 6
+#define GPIO_OE_OFS 12
+
+struct adm8668_gpio_chip {
+ void __iomem *base;
+ struct gpio_chip chip;
+};
+
+static int adm8668_gpio_dir_out(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct adm8668_gpio_chip *c =
+ container_of(chip, struct adm8668_gpio_chip, chip);
+ u32 mask;
+
+ /* clear input, set output enable and output value */
+ mask = __raw_readl(c->base);
+ mask &= ~(1 << offset);
+ mask |= (1 << (offset + GPIO_OE_OFS));
+ if (value)
+ mask |= (1 << (offset + GPIO_OUT_OFS));
+ else
+ mask &= ~(1 << (offset + GPIO_OUT_OFS));
+ __raw_writel(mask, c->base);
+
+ return 0;
+}
+
+static int adm8668_gpio_dir_in(struct gpio_chip *chip,
+ unsigned offset)
+{
+ struct adm8668_gpio_chip *c =
+ container_of(chip, struct adm8668_gpio_chip, chip);
+ u32 mask;
+
+ mask = __raw_readl(c->base);
+ mask &= ~(((1 << (offset + GPIO_OE_OFS)) | (1 << (offset + GPIO_OUT_OFS))));
+ mask |= (1 << offset);
+ __raw_writel(mask, c->base);
+
+ return 0;
+}
+
+static void adm8668_gpio_set(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct adm8668_gpio_chip *c =
+ container_of(chip, struct adm8668_gpio_chip, chip);
+ u32 mask;
+
+ mask = __raw_readl(c->base);
+ if (value)
+ mask |= (1 << (offset + GPIO_OUT_OFS));
+ else
+ mask &= ~(1 << (offset + GPIO_OUT_OFS));
+ __raw_writel(mask, c->base);
+}
+
+static int adm8668_gpio_get(struct gpio_chip *chip,
+ unsigned offset)
+{
+ struct adm8668_gpio_chip *c =
+ container_of(chip, struct adm8668_gpio_chip, chip);
+ u32 value;
+
+ value = __raw_readl(c->base) & GPIO_MASK;
+
+ return value & (1 << offset);
+}
+
+static struct adm8668_gpio_chip adm8668_gpio_cpu = {
+ .base = (void __iomem *)KSEG1ADDR(ADM8668_CONFIG_BASE + CRGPIO_REG),
+ .chip = {
+ .label = "adm8668-cpu-gpio",
+ .direction_output = adm8668_gpio_dir_out,
+ .direction_input = adm8668_gpio_dir_in,
+ .set = adm8668_gpio_set,
+ .get = adm8668_gpio_get,
+ .ngpio = 6,
+ },
+};
+
+static struct adm8668_gpio_chip adm8668_gpio_wlan = {
+ .base = (void __iomem *)KSEG1ADDR(ADM8668_WLAN_BASE + GPIO_REG),
+ .chip = {
+ .label = "adm8668-wlan-gpio",
+ .direction_output = adm8668_gpio_dir_out,
+ .direction_input = adm8668_gpio_dir_in,
+ .set = adm8668_gpio_set,
+ .get = adm8668_gpio_get,
+ .ngpio = 6,
+ .base = 6,
+ },
+};
+
+static int __init adm8668_gpio_init(void)
+{
+ int ret;
+
+ ret = gpiochip_add(&adm8668_gpio_cpu.chip);
+ if (ret)
+ return ret;
+
+ return gpiochip_add(&adm8668_gpio_wlan.chip);
+}
+arch_initcall(adm8668_gpio_init);
diff --git a/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/gpio.h b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/gpio.h
new file mode 100644
index 0000000000..b0473fc4b3
--- /dev/null
+++ b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/gpio.h
@@ -0,0 +1,13 @@
+#ifndef __ADM8668_GPIO_H__
+#define __ADM8668_GPIO_H__
+
+#define gpio_to_irq(gpio) -1
+
+#define gpio_get_value __gpio_get_value
+#define gpio_set_value __gpio_set_value
+
+#define gpio_cansleep __gpio_cansleep
+
+#include <asm-generic/gpio.h>
+
+#endif
diff --git a/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch b/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
index 66be46c8d0..1d52bcf97d 100644
--- a/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
+++ b/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
@@ -10,7 +10,7 @@
include $(patsubst %, $(srctree)/arch/mips/%/Platform, $(platforms))
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -105,6 +105,25 @@ config BCM47XX
+@@ -105,6 +105,26 @@ config BCM47XX
help
Support for BCM47XX based boards
@@ -29,6 +29,7 @@
+ select DMA_NONCOHERENT
+ select SWAP_IO_SPACE
+ select SYS_HAS_EARLY_PRINTK
++ select ARCH_REQUIRE_GPIOLIB
+ help
+ ADM8668 board support by neutronscott
+ Scott Nicholas <neutronscott@scottn.us>
@@ -36,7 +37,7 @@
config BCM63XX
bool "Broadcom BCM63XX based boards"
select CEVT_R4K
-@@ -813,6 +832,7 @@ config NLM_XLP_BOARD
+@@ -813,6 +833,7 @@ config NLM_XLP_BOARD
endchoice