add a gpiolib driver
authorFlorian Fainelli <florian@openwrt.org>
Thu, 6 Dec 2012 22:41:04 +0000 (22:41 +0000)
committerFlorian Fainelli <florian@openwrt.org>
Thu, 6 Dec 2012 22:41:04 +0000 (22:41 +0000)
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 34564

target/linux/adm8668/config-3.3
target/linux/adm8668/files/arch/mips/adm8668/gpio.c [new file with mode: 0644]
target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/gpio.h [new file with mode: 0644]
target/linux/adm8668/patches-3.3/001-adm8668_arch.patch

index 169245d..e63f140 100644 (file)
@@ -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 (file)
index 0000000..fb39f7f
--- /dev/null
@@ -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 (file)
index 0000000..b0473fc
--- /dev/null
@@ -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
index 66be46c..1d52bcf 100644 (file)
@@ -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