gpio: Move the exynos4 GPIO to drivers/gpio

Move the Samsung Exynos4 series SoCs GPIO driver to drivers/gpio

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

3 files changed, 372 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 3735c051074f..dbe43b4e02ba 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -86,6 +86,12 @@ config GPIO_IT8761E
         help
           Say yes here to support GPIO functionality of IT8761E super I/O chip.
 
+config GPIO_EXYNOS4
+        bool "Samsung Exynos4 GPIO library support"
+        default y if CPU_EXYNOS4210
+        help
+          Say yes here to support Samsung Exynos4 series SoCs GPIO library
+
 config GPIO_PLAT_SAMSUNG
         bool "Samsung SoCs GPIO library support"
         default y if SAMSUNG_GPIOLIB_4BIT
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 426483f60d63..d7f960140bfb 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= adp5520-gpio.o
 obj-$(CONFIG_GPIO_ADP5588)      += adp5588-gpio.o
 obj-$(CONFIG_GPIO_BASIC_MMIO_CORE)      += basic_mmio_gpio.o
 obj-$(CONFIG_GPIO_BASIC_MMIO)   += basic_mmio_gpio.o
+obj-$(CONFIG_GPIO_EXYNOS4)      += gpio-exynos4.o
 obj-$(CONFIG_GPIO_PLAT_SAMSUNG) += gpio-plat-samsung.o
 obj-$(CONFIG_GPIO_LANGWELL)     += langwell_gpio.o
 obj-$(CONFIG_GPIO_MAX730X)      += max730x.o
diff --git a/drivers/gpio/gpio-exynos4.c b/drivers/gpio/gpio-exynos4.c
new file mode 100644
index 000000000000..d54ca6adb660
--- /dev/null
+++ b/drivers/gpio/gpio-exynos4.c
@@ -0,0 +1,365 @@
+/* linux/arch/arm/mach-exynos4/gpiolib.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * EXYNOS4 - GPIOlib support
+ *
+ * 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/irq.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include <mach/map.h>
+
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+static struct s3c_gpio_cfg gpio_cfg = {
+        .set_config     = s3c_gpio_setcfg_s3c64xx_4bit,
+        .set_pull       = s3c_gpio_setpull_updown,
+        .get_pull       = s3c_gpio_getpull_updown,
+};
+
+static struct s3c_gpio_cfg gpio_cfg_noint = {
+        .set_config     = s3c_gpio_setcfg_s3c64xx_4bit,
+        .set_pull       = s3c_gpio_setpull_updown,
+        .get_pull       = s3c_gpio_getpull_updown,
+};
+
+/*
+ * Following are the gpio banks in v310.
+ *
+ * The 'config' member when left to NULL, is initialized to the default
+ * structure gpio_cfg in the init function below.
+ *
+ * The 'base' member is also initialized in the init function below.
+ * Note: The initialization of 'base' member of s3c_gpio_chip structure
+ * uses the above macro and depends on the banks being listed in order here.
+ */
+static struct s3c_gpio_chip exynos4_gpio_part1_4bit[] = {
+        {
+                .chip   = {
+                        .base   = EXYNOS4_GPA0(0),
+                        .ngpio  = EXYNOS4_GPIO_A0_NR,
+                        .label  = "GPA0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPA1(0),
+                        .ngpio  = EXYNOS4_GPIO_A1_NR,
+                        .label  = "GPA1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPB(0),
+                        .ngpio  = EXYNOS4_GPIO_B_NR,
+                        .label  = "GPB",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPC0(0),
+                        .ngpio  = EXYNOS4_GPIO_C0_NR,
+                        .label  = "GPC0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPC1(0),
+                        .ngpio  = EXYNOS4_GPIO_C1_NR,
+                        .label  = "GPC1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPD0(0),
+                        .ngpio  = EXYNOS4_GPIO_D0_NR,
+                        .label  = "GPD0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPD1(0),
+                        .ngpio  = EXYNOS4_GPIO_D1_NR,
+                        .label  = "GPD1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPE0(0),
+                        .ngpio  = EXYNOS4_GPIO_E0_NR,
+                        .label  = "GPE0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPE1(0),
+                        .ngpio  = EXYNOS4_GPIO_E1_NR,
+                        .label  = "GPE1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPE2(0),
+                        .ngpio  = EXYNOS4_GPIO_E2_NR,
+                        .label  = "GPE2",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPE3(0),
+                        .ngpio  = EXYNOS4_GPIO_E3_NR,
+                        .label  = "GPE3",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPE4(0),
+                        .ngpio  = EXYNOS4_GPIO_E4_NR,
+                        .label  = "GPE4",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPF0(0),
+                        .ngpio  = EXYNOS4_GPIO_F0_NR,
+                        .label  = "GPF0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPF1(0),
+                        .ngpio  = EXYNOS4_GPIO_F1_NR,
+                        .label  = "GPF1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPF2(0),
+                        .ngpio  = EXYNOS4_GPIO_F2_NR,
+                        .label  = "GPF2",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPF3(0),
+                        .ngpio  = EXYNOS4_GPIO_F3_NR,
+                        .label  = "GPF3",
+                },
+        },
+};
+
+static struct s3c_gpio_chip exynos4_gpio_part2_4bit[] = {
+        {
+                .chip   = {
+                        .base   = EXYNOS4_GPJ0(0),
+                        .ngpio  = EXYNOS4_GPIO_J0_NR,
+                        .label  = "GPJ0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPJ1(0),
+                        .ngpio  = EXYNOS4_GPIO_J1_NR,
+                        .label  = "GPJ1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPK0(0),
+                        .ngpio  = EXYNOS4_GPIO_K0_NR,
+                        .label  = "GPK0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPK1(0),
+                        .ngpio  = EXYNOS4_GPIO_K1_NR,
+                        .label  = "GPK1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPK2(0),
+                        .ngpio  = EXYNOS4_GPIO_K2_NR,
+                        .label  = "GPK2",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPK3(0),
+                        .ngpio  = EXYNOS4_GPIO_K3_NR,
+                        .label  = "GPK3",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPL0(0),
+                        .ngpio  = EXYNOS4_GPIO_L0_NR,
+                        .label  = "GPL0",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPL1(0),
+                        .ngpio  = EXYNOS4_GPIO_L1_NR,
+                        .label  = "GPL1",
+                },
+        }, {
+                .chip   = {
+                        .base   = EXYNOS4_GPL2(0),
+                        .ngpio  = EXYNOS4_GPIO_L2_NR,
+                        .label  = "GPL2",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY0(0),
+                        .ngpio  = EXYNOS4_GPIO_Y0_NR,
+                        .label  = "GPY0",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY1(0),
+                        .ngpio  = EXYNOS4_GPIO_Y1_NR,
+                        .label  = "GPY1",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY2(0),
+                        .ngpio  = EXYNOS4_GPIO_Y2_NR,
+                        .label  = "GPY2",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY3(0),
+                        .ngpio  = EXYNOS4_GPIO_Y3_NR,
+                        .label  = "GPY3",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY4(0),
+                        .ngpio  = EXYNOS4_GPIO_Y4_NR,
+                        .label  = "GPY4",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY5(0),
+                        .ngpio  = EXYNOS4_GPIO_Y5_NR,
+                        .label  = "GPY5",
+                },
+        }, {
+                .config = &gpio_cfg_noint,
+                .chip   = {
+                        .base   = EXYNOS4_GPY6(0),
+                        .ngpio  = EXYNOS4_GPIO_Y6_NR,
+                        .label  = "GPY6",
+                },
+        }, {
+                .base   = (S5P_VA_GPIO2 + 0xC00),
+                .config = &gpio_cfg_noint,
+                .irq_base = IRQ_EINT(0),
+                .chip   = {
+                        .base   = EXYNOS4_GPX0(0),
+                        .ngpio  = EXYNOS4_GPIO_X0_NR,
+                        .label  = "GPX0",
+                        .to_irq = samsung_gpiolib_to_irq,
+                },
+        }, {
+                .base   = (S5P_VA_GPIO2 + 0xC20),
+                .config = &gpio_cfg_noint,
+                .irq_base = IRQ_EINT(8),
+                .chip   = {
+                        .base   = EXYNOS4_GPX1(0),
+                        .ngpio  = EXYNOS4_GPIO_X1_NR,
+                        .label  = "GPX1",
+                        .to_irq = samsung_gpiolib_to_irq,
+                },
+        }, {
+                .base   = (S5P_VA_GPIO2 + 0xC40),
+                .config = &gpio_cfg_noint,
+                .irq_base = IRQ_EINT(16),
+                .chip   = {
+                        .base   = EXYNOS4_GPX2(0),
+                        .ngpio  = EXYNOS4_GPIO_X2_NR,
+                        .label  = "GPX2",
+                        .to_irq = samsung_gpiolib_to_irq,
+                },
+        }, {
+                .base   = (S5P_VA_GPIO2 + 0xC60),
+                .config = &gpio_cfg_noint,
+                .irq_base = IRQ_EINT(24),
+                .chip   = {
+                        .base   = EXYNOS4_GPX3(0),
+                        .ngpio  = EXYNOS4_GPIO_X3_NR,
+                        .label  = "GPX3",
+                        .to_irq = samsung_gpiolib_to_irq,
+                },
+        },
+};
+
+static struct s3c_gpio_chip exynos4_gpio_part3_4bit[] = {
+        {
+                .chip   = {
+                        .base   = EXYNOS4_GPZ(0),
+                        .ngpio  = EXYNOS4_GPIO_Z_NR,
+                        .label  = "GPZ",
+                },
+        },
+};
+
+static __init int exynos4_gpiolib_init(void)
+{
+        struct s3c_gpio_chip *chip;
+        int i;
+        int group = 0;
+        int nr_chips;
+
+        /* GPIO part 1 */
+
+        chip = exynos4_gpio_part1_4bit;
+        nr_chips = ARRAY_SIZE(exynos4_gpio_part1_4bit);
+
+        for (i = 0; i < nr_chips; i++, chip++) {
+                if (chip->config == NULL) {
+                        chip->config = &gpio_cfg;
+                        /* Assign the GPIO interrupt group */
+                        chip->group = group++;
+                }
+                if (chip->base == NULL)
+                        chip->base = S5P_VA_GPIO1 + (i) * 0x20;
+        }
+
+        samsung_gpiolib_add_4bit_chips(exynos4_gpio_part1_4bit, nr_chips);
+
+        /* GPIO part 2 */
+
+        chip = exynos4_gpio_part2_4bit;
+        nr_chips = ARRAY_SIZE(exynos4_gpio_part2_4bit);
+
+        for (i = 0; i < nr_chips; i++, chip++) {
+                if (chip->config == NULL) {
+                        chip->config = &gpio_cfg;
+                        /* Assign the GPIO interrupt group */
+                        chip->group = group++;
+                }
+                if (chip->base == NULL)
+                        chip->base = S5P_VA_GPIO2 + (i) * 0x20;
+        }
+
+        samsung_gpiolib_add_4bit_chips(exynos4_gpio_part2_4bit, nr_chips);
+
+        /* GPIO part 3 */
+
+        chip = exynos4_gpio_part3_4bit;
+        nr_chips = ARRAY_SIZE(exynos4_gpio_part3_4bit);
+
+        for (i = 0; i < nr_chips; i++, chip++) {
+                if (chip->config == NULL) {
+                        chip->config = &gpio_cfg;
+                        /* Assign the GPIO interrupt group */
+                        chip->group = group++;
+                }
+                if (chip->base == NULL)
+                        chip->base = S5P_VA_GPIO3 + (i) * 0x20;
+        }
+
+        samsung_gpiolib_add_4bit_chips(exynos4_gpio_part3_4bit, nr_chips);
+        s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
+        s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
+
+        return 0;
+}
+core_initcall(exynos4_gpiolib_init);