diff options
Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
-rw-r--r-- | arch/arm/plat-omap/gpio.c | 413 |
1 files changed, 98 insertions, 315 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index 2b0d90109828..6f53dee98a91 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -21,6 +21,8 @@ #include <linux/err.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> +#include <linux/pm_runtime.h> #include <mach/hardware.h> #include <asm/irq.h> @@ -32,7 +34,6 @@ /* * OMAP1510 GPIO registers */ -#define OMAP1510_GPIO_BASE 0xfffce000 #define OMAP1510_GPIO_DATA_INPUT 0x00 #define OMAP1510_GPIO_DATA_OUTPUT 0x04 #define OMAP1510_GPIO_DIR_CONTROL 0x08 @@ -46,10 +47,6 @@ /* * OMAP1610 specific GPIO registers */ -#define OMAP1610_GPIO1_BASE 0xfffbe400 -#define OMAP1610_GPIO2_BASE 0xfffbec00 -#define OMAP1610_GPIO3_BASE 0xfffbb400 -#define OMAP1610_GPIO4_BASE 0xfffbbc00 #define OMAP1610_GPIO_REVISION 0x0000 #define OMAP1610_GPIO_SYSCONFIG 0x0010 #define OMAP1610_GPIO_SYSSTATUS 0x0014 @@ -71,12 +68,6 @@ /* * OMAP7XX specific GPIO registers */ -#define OMAP7XX_GPIO1_BASE 0xfffbc000 -#define OMAP7XX_GPIO2_BASE 0xfffbc800 -#define OMAP7XX_GPIO3_BASE 0xfffbd000 -#define OMAP7XX_GPIO4_BASE 0xfffbd800 -#define OMAP7XX_GPIO5_BASE 0xfffbe000 -#define OMAP7XX_GPIO6_BASE 0xfffbe800 #define OMAP7XX_GPIO_DATA_INPUT 0x00 #define OMAP7XX_GPIO_DATA_OUTPUT 0x04 #define OMAP7XX_GPIO_DIR_CONTROL 0x08 @@ -84,25 +75,10 @@ #define OMAP7XX_GPIO_INT_MASK 0x10 #define OMAP7XX_GPIO_INT_STATUS 0x14 -#define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE - /* - * omap24xx specific GPIO registers + * omap2+ specific GPIO registers */ -#define OMAP242X_GPIO1_BASE 0x48018000 -#define OMAP242X_GPIO2_BASE 0x4801a000 -#define OMAP242X_GPIO3_BASE 0x4801c000 -#define OMAP242X_GPIO4_BASE 0x4801e000 - -#define OMAP243X_GPIO1_BASE 0x4900C000 -#define OMAP243X_GPIO2_BASE 0x4900E000 -#define OMAP243X_GPIO3_BASE 0x49010000 -#define OMAP243X_GPIO4_BASE 0x49012000 -#define OMAP243X_GPIO5_BASE 0x480B6000 - #define OMAP24XX_GPIO_REVISION 0x0000 -#define OMAP24XX_GPIO_SYSCONFIG 0x0010 -#define OMAP24XX_GPIO_SYSSTATUS 0x0014 #define OMAP24XX_GPIO_IRQSTATUS1 0x0018 #define OMAP24XX_GPIO_IRQSTATUS2 0x0028 #define OMAP24XX_GPIO_IRQENABLE2 0x002c @@ -126,7 +102,6 @@ #define OMAP24XX_GPIO_SETDATAOUT 0x0094 #define OMAP4_GPIO_REVISION 0x0000 -#define OMAP4_GPIO_SYSCONFIG 0x0010 #define OMAP4_GPIO_EOI 0x0020 #define OMAP4_GPIO_IRQSTATUSRAW0 0x0024 #define OMAP4_GPIO_IRQSTATUSRAW1 0x0028 @@ -138,7 +113,6 @@ #define OMAP4_GPIO_IRQSTATUSCLR1 0x0040 #define OMAP4_GPIO_IRQWAKEN0 0x0044 #define OMAP4_GPIO_IRQWAKEN1 0x0048 -#define OMAP4_GPIO_SYSSTATUS 0x0114 #define OMAP4_GPIO_IRQENABLE1 0x011c #define OMAP4_GPIO_WAKE_EN 0x0120 #define OMAP4_GPIO_IRQSTATUS2 0x0128 @@ -159,26 +133,6 @@ #define OMAP4_GPIO_SETWKUENA 0x0184 #define OMAP4_GPIO_CLEARDATAOUT 0x0190 #define OMAP4_GPIO_SETDATAOUT 0x0194 -/* - * omap34xx specific GPIO registers - */ - -#define OMAP34XX_GPIO1_BASE 0x48310000 -#define OMAP34XX_GPIO2_BASE 0x49050000 -#define OMAP34XX_GPIO3_BASE 0x49052000 -#define OMAP34XX_GPIO4_BASE 0x49054000 -#define OMAP34XX_GPIO5_BASE 0x49056000 -#define OMAP34XX_GPIO6_BASE 0x49058000 - -/* - * OMAP44XX specific GPIO registers - */ -#define OMAP44XX_GPIO1_BASE 0x4a310000 -#define OMAP44XX_GPIO2_BASE 0x48055000 -#define OMAP44XX_GPIO3_BASE 0x48057000 -#define OMAP44XX_GPIO4_BASE 0x48059000 -#define OMAP44XX_GPIO5_BASE 0x4805B000 -#define OMAP44XX_GPIO6_BASE 0x4805D000 struct gpio_bank { unsigned long pbase; @@ -203,97 +157,12 @@ struct gpio_bank { struct clk *dbck; u32 mod_usage; u32 dbck_enable_mask; + struct device *dev; + bool dbck_flag; }; -#ifdef CONFIG_ARCH_OMAP16XX -static struct gpio_bank gpio_bank_1610[5] = { - { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE, - METHOD_MPUIO }, - { OMAP1610_GPIO1_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_1610 }, - { OMAP1610_GPIO2_BASE, NULL, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16, - METHOD_GPIO_1610 }, - { OMAP1610_GPIO3_BASE, NULL, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32, - METHOD_GPIO_1610 }, - { OMAP1610_GPIO4_BASE, NULL, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48, - METHOD_GPIO_1610 }, -}; -#endif - -#ifdef CONFIG_ARCH_OMAP15XX -static struct gpio_bank gpio_bank_1510[2] = { - { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE, - METHOD_MPUIO }, - { OMAP1510_GPIO_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_1510 } -}; -#endif - -#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850) -static struct gpio_bank gpio_bank_7xx[7] = { - { OMAP1_MPUIO_VBASE, NULL, INT_7XX_MPUIO, IH_MPUIO_BASE, - METHOD_MPUIO }, - { OMAP7XX_GPIO1_BASE, NULL, INT_7XX_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_7XX }, - { OMAP7XX_GPIO2_BASE, NULL, INT_7XX_GPIO_BANK2, IH_GPIO_BASE + 32, - METHOD_GPIO_7XX }, - { OMAP7XX_GPIO3_BASE, NULL, INT_7XX_GPIO_BANK3, IH_GPIO_BASE + 64, - METHOD_GPIO_7XX }, - { OMAP7XX_GPIO4_BASE, NULL, INT_7XX_GPIO_BANK4, IH_GPIO_BASE + 96, - METHOD_GPIO_7XX }, - { OMAP7XX_GPIO5_BASE, NULL, INT_7XX_GPIO_BANK5, IH_GPIO_BASE + 128, - METHOD_GPIO_7XX }, - { OMAP7XX_GPIO6_BASE, NULL, INT_7XX_GPIO_BANK6, IH_GPIO_BASE + 160, - METHOD_GPIO_7XX }, -}; -#endif - -#ifdef CONFIG_ARCH_OMAP2 - -static struct gpio_bank gpio_bank_242x[4] = { - { OMAP242X_GPIO1_BASE, NULL, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_24XX }, - { OMAP242X_GPIO2_BASE, NULL, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, - METHOD_GPIO_24XX }, - { OMAP242X_GPIO3_BASE, NULL, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, - METHOD_GPIO_24XX }, - { OMAP242X_GPIO4_BASE, NULL, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, - METHOD_GPIO_24XX }, -}; - -static struct gpio_bank gpio_bank_243x[5] = { - { OMAP243X_GPIO1_BASE, NULL, INT_24XX_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_24XX }, - { OMAP243X_GPIO2_BASE, NULL, INT_24XX_GPIO_BANK2, IH_GPIO_BASE + 32, - METHOD_GPIO_24XX }, - { OMAP243X_GPIO3_BASE, NULL, INT_24XX_GPIO_BANK3, IH_GPIO_BASE + 64, - METHOD_GPIO_24XX }, - { OMAP243X_GPIO4_BASE, NULL, INT_24XX_GPIO_BANK4, IH_GPIO_BASE + 96, - METHOD_GPIO_24XX }, - { OMAP243X_GPIO5_BASE, NULL, INT_24XX_GPIO_BANK5, IH_GPIO_BASE + 128, - METHOD_GPIO_24XX }, -}; - -#endif - #ifdef CONFIG_ARCH_OMAP3 -static struct gpio_bank gpio_bank_34xx[6] = { - { OMAP34XX_GPIO1_BASE, NULL, INT_34XX_GPIO_BANK1, IH_GPIO_BASE, - METHOD_GPIO_24XX }, - { OMAP34XX_GPIO2_BASE, NULL, INT_34XX_GPIO_BANK2, IH_GPIO_BASE + 32, - METHOD_GPIO_24XX }, - { OMAP34XX_GPIO3_BASE, NULL, INT_34XX_GPIO_BANK3, IH_GPIO_BASE + 64, - METHOD_GPIO_24XX }, - { OMAP34XX_GPIO4_BASE, NULL, INT_34XX_GPIO_BANK4, IH_GPIO_BASE + 96, - METHOD_GPIO_24XX }, - { OMAP34XX_GPIO5_BASE, NULL, INT_34XX_GPIO_BANK5, IH_GPIO_BASE + 128, - METHOD_GPIO_24XX }, - { OMAP34XX_GPIO6_BASE, NULL, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160, - METHOD_GPIO_24XX }, -}; - struct omap3_gpio_regs { - u32 sysconfig; u32 irqenable1; u32 irqenable2; u32 wake_en; @@ -309,25 +178,14 @@ struct omap3_gpio_regs { static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS]; #endif -#ifdef CONFIG_ARCH_OMAP4 -static struct gpio_bank gpio_bank_44xx[6] = { - { OMAP44XX_GPIO1_BASE, NULL, OMAP44XX_IRQ_GPIO1, IH_GPIO_BASE, - METHOD_GPIO_44XX }, - { OMAP44XX_GPIO2_BASE, NULL, OMAP44XX_IRQ_GPIO2, IH_GPIO_BASE + 32, - METHOD_GPIO_44XX }, - { OMAP44XX_GPIO3_BASE, NULL, OMAP44XX_IRQ_GPIO3, IH_GPIO_BASE + 64, - METHOD_GPIO_44XX }, - { OMAP44XX_GPIO4_BASE, NULL, OMAP44XX_IRQ_GPIO4, IH_GPIO_BASE + 96, - METHOD_GPIO_44XX }, - { OMAP44XX_GPIO5_BASE, NULL, OMAP44XX_IRQ_GPIO5, IH_GPIO_BASE + 128, - METHOD_GPIO_44XX }, - { OMAP44XX_GPIO6_BASE, NULL, OMAP44XX_IRQ_GPIO6, IH_GPIO_BASE + 160, - METHOD_GPIO_44XX }, -}; +/* + * TODO: Cleanup gpio_bank usage as it is having information + * related to all instances of the device + */ +static struct gpio_bank *gpio_bank; -#endif +static int bank_width; -static struct gpio_bank *gpio_bank; /* TODO: Analyze removing gpio_bank_count usage from driver code */ int gpio_bank_count; @@ -634,6 +492,9 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, u32 val; u32 l; + if (!bank->dbck_flag) + return; + if (debounce < 32) debounce = 0x01; else if (debounce > 7936) @@ -643,7 +504,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, l = 1 << get_gpio_index(gpio); - if (cpu_is_omap44xx()) + if (bank->method == METHOD_GPIO_44XX) reg += OMAP4_GPIO_DEBOUNCINGTIME; else reg += OMAP24XX_GPIO_DEBOUNCE_VAL; @@ -651,7 +512,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, __raw_writel(debounce, reg); reg = bank->base; - if (cpu_is_omap44xx()) + if (bank->method == METHOD_GPIO_44XX) reg += OMAP4_GPIO_DEBOUNCENABLE; else reg += OMAP24XX_GPIO_DEBOUNCE_EN; @@ -660,12 +521,10 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, if (debounce) { val |= l; - if (cpu_is_omap34xx() || cpu_is_omap44xx()) - clk_enable(bank->dbck); + clk_enable(bank->dbck); } else { val &= ~l; - if (cpu_is_omap34xx() || cpu_is_omap44xx()) - clk_disable(bank->dbck); + clk_disable(bank->dbck); } bank->dbck_enable_mask = val; @@ -1537,7 +1396,8 @@ static struct platform_device omap_mpuio_device = { static inline void mpuio_init(void) { - platform_set_drvdata(&omap_mpuio_device, &gpio_bank_1610[0]); + struct gpio_bank *bank = get_gpio_bank(OMAP_MPUIO(0)); + platform_set_drvdata(&omap_mpuio_device, bank); if (platform_driver_register(&omap_mpuio_driver) == 0) (void) platform_device_register(&omap_mpuio_device); @@ -1642,6 +1502,13 @@ static int gpio_debounce(struct gpio_chip *chip, unsigned offset, unsigned long flags; bank = container_of(chip, struct gpio_bank, chip); + + if (!bank->dbck) { + bank->dbck = clk_get(bank->dev, "dbclk"); + if (IS_ERR(bank->dbck)) + dev_err(bank->dev, "Could not get gpio dbck\n"); + } + spin_lock_irqsave(&bank->lock, flags); _set_gpio_debounce(bank, offset, debounce); spin_unlock_irqrestore(&bank->lock, flags); @@ -1670,24 +1537,6 @@ static int gpio_2irq(struct gpio_chip *chip, unsigned offset) /*---------------------------------------------------------------------*/ -static int initialized; -#if defined(CONFIG_ARCH_OMAP1) || defined(CONFIG_ARCH_OMAP2) -static struct clk * gpio_ick; -#endif - -#if defined(CONFIG_ARCH_OMAP2) -static struct clk * gpio_fck; -#endif - -#if defined(CONFIG_ARCH_OMAP2430) -static struct clk * gpio5_ick; -static struct clk * gpio5_fck; -#endif - -#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) -static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS]; -#endif - static void __init omap_gpio_show_rev(struct gpio_bank *bank) { u32 rev; @@ -1710,6 +1559,19 @@ static void __init omap_gpio_show_rev(struct gpio_bank *bank) */ static struct lock_class_key gpio_lock_class; +static inline int init_gpio_info(struct platform_device *pdev) +{ + /* TODO: Analyze removing gpio_bank_count usage from driver code */ + gpio_bank = kzalloc(gpio_bank_count * sizeof(struct gpio_bank), + GFP_KERNEL); + if (!gpio_bank) { + dev_err(&pdev->dev, "Memory alloc failed for gpio_bank\n"); + return -ENOMEM; + } + return 0; +} + +/* TODO: Cleanup cpu_is_* checks */ static void omap_gpio_mod_init(struct gpio_bank *bank, int id) { if (cpu_class_is_omap2()) { @@ -1773,16 +1635,9 @@ static void omap_gpio_mod_init(struct gpio_bank *bank, int id) static void __init omap_gpio_chip_init(struct gpio_bank *bank) { - int j, bank_width = 16; + int j; static int gpio; - if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) - bank_width = 32; /* 7xx has 32-bit GPIOs */ - - if ((bank->method == METHOD_GPIO_24XX) || - (bank->method == METHOD_GPIO_44XX)) - bank_width = 32; - bank->mod_usage = 0; /* * REVISIT eventually switch from OMAP-specific gpio structs @@ -1826,139 +1681,68 @@ static void __init omap_gpio_chip_init(struct gpio_bank *bank) set_irq_data(bank->irq, bank); } -static int __init _omap_gpio_init(void) +static int __devinit omap_gpio_probe(struct platform_device *pdev) { - int i; + static int gpio_init_done; + struct omap_gpio_platform_data *pdata; + struct resource *res; + int id; struct gpio_bank *bank; - int bank_size = SZ_8K; /* Module 4KB + L4 4KB except on omap1 */ - char clk_name[11]; - initialized = 1; + if (!pdev->dev.platform_data) + return -EINVAL; -#if defined(CONFIG_ARCH_OMAP1) - if (cpu_is_omap15xx()) { - gpio_ick = clk_get(NULL, "arm_gpio_ck"); - if (IS_ERR(gpio_ick)) - printk("Could not get arm_gpio_ck\n"); - else - clk_enable(gpio_ick); - } -#endif -#if defined(CONFIG_ARCH_OMAP2) - if (cpu_class_is_omap2()) { - gpio_ick = clk_get(NULL, "gpios_ick"); - if (IS_ERR(gpio_ick)) - printk("Could not get gpios_ick\n"); - else - clk_enable(gpio_ick); - gpio_fck = clk_get(NULL, "gpios_fck"); - if (IS_ERR(gpio_fck)) - printk("Could not get gpios_fck\n"); - else - clk_enable(gpio_fck); + pdata = pdev->dev.platform_data; - /* - * On 2430 & 3430 GPIO 5 uses CORE L4 ICLK - */ -#if defined(CONFIG_ARCH_OMAP2430) - if (cpu_is_omap2430()) { - gpio5_ick = clk_get(NULL, "gpio5_ick"); - if (IS_ERR(gpio5_ick)) - printk("Could not get gpio5_ick\n"); - else - clk_enable(gpio5_ick); - gpio5_fck = clk_get(NULL, "gpio5_fck"); - if (IS_ERR(gpio5_fck)) - printk("Could not get gpio5_fck\n"); - else - clk_enable(gpio5_fck); - } -#endif - } -#endif + if (!gpio_init_done) { + int ret; -#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) - if (cpu_is_omap34xx() || cpu_is_omap44xx()) { - for (i = 0; i < OMAP34XX_NR_GPIOS; i++) { - sprintf(clk_name, "gpio%d_ick", i + 1); - gpio_iclks[i] = clk_get(NULL, clk_name); - if (IS_ERR(gpio_iclks[i])) - printk(KERN_ERR "Could not get %s\n", clk_name); - else - clk_enable(gpio_iclks[i]); - } + ret = init_gpio_info(pdev); + if (ret) + return ret; } -#endif + id = pdev->id; + bank = &gpio_bank[id]; -#ifdef CONFIG_ARCH_OMAP15XX - if (cpu_is_omap15xx()) { - gpio_bank_count = 2; - gpio_bank = gpio_bank_1510; - bank_size = SZ_2K; - } -#endif -#if defined(CONFIG_ARCH_OMAP16XX) - if (cpu_is_omap16xx()) { - gpio_bank_count = 5; - gpio_bank = gpio_bank_1610; - bank_size = SZ_2K; - } -#endif -#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850) - if (cpu_is_omap7xx()) { - gpio_bank_count = 7; - gpio_bank = gpio_bank_7xx; - bank_size = SZ_2K; - } -#endif -#ifdef CONFIG_ARCH_OMAP2 - if (cpu_is_omap242x()) { - gpio_bank_count = 4; - gpio_bank = gpio_bank_242x; - } - if (cpu_is_omap243x()) { - gpio_bank_count = 5; - gpio_bank = gpio_bank_243x; - } -#endif -#ifdef CONFIG_ARCH_OMAP3 - if (cpu_is_omap34xx()) { - gpio_bank_count = OMAP34XX_NR_GPIOS; - gpio_bank = gpio_bank_34xx; - } -#endif -#ifdef CONFIG_ARCH_OMAP4 - if (cpu_is_omap44xx()) { - gpio_bank_count = OMAP34XX_NR_GPIOS; - gpio_bank = gpio_bank_44xx; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (unlikely(!res)) { + dev_err(&pdev->dev, "GPIO Bank %i Invalid IRQ resource\n", id); + return -ENODEV; } -#endif - for (i = 0; i < gpio_bank_count; i++) { - bank = &gpio_bank[i]; - spin_lock_init(&bank->lock); + bank->irq = res->start; + bank->virtual_irq_start = pdata->virtual_irq_start; + bank->method = pdata->bank_type; + bank->dev = &pdev->dev; + bank->dbck_flag = pdata->dbck_flag; + bank_width = pdata->bank_width; - /* Static mapping, never released */ - bank->base = ioremap(bank->pbase, bank_size); - if (!bank->base) { - printk(KERN_ERR "Could not ioremap gpio bank%i\n", i); - continue; - } + spin_lock_init(&bank->lock); - omap_gpio_mod_init(bank, i); - omap_gpio_chip_init(bank); + /* Static mapping, never released */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (unlikely(!res)) { + dev_err(&pdev->dev, "GPIO Bank %i Invalid mem resource\n", id); + return -ENODEV; + } - if (cpu_is_omap34xx() || cpu_is_omap44xx()) { - sprintf(clk_name, "gpio%d_dbck", i + 1); - bank->dbck = clk_get(NULL, clk_name); - if (IS_ERR(bank->dbck)) - printk(KERN_ERR "Could not get %s\n", clk_name); - } + bank->base = ioremap(res->start, resource_size(res)); + if (!bank->base) { + dev_err(&pdev->dev, "Could not ioremap gpio bank%i\n", id); + return -ENOMEM; } + pm_runtime_enable(bank->dev); + pm_runtime_get_sync(bank->dev); + + omap_gpio_mod_init(bank, id); + omap_gpio_chip_init(bank); omap_gpio_show_rev(bank); + if (!gpio_init_done) + gpio_init_done = 1; + return 0; } @@ -2252,8 +2036,6 @@ void omap_gpio_save_context(void) /* saving banks from 2-6 only since GPIO1 is in WKUP */ for (i = 1; i < gpio_bank_count; i++) { struct gpio_bank *bank = &gpio_bank[i]; - gpio_context[i].sysconfig = - __raw_readl(bank->base + OMAP24XX_GPIO_SYSCONFIG); gpio_context[i].irqenable1 = __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1); gpio_context[i].irqenable2 = @@ -2284,8 +2066,6 @@ void omap_gpio_restore_context(void) for (i = 1; i < gpio_bank_count; i++) { struct gpio_bank *bank = &gpio_bank[i]; - __raw_writel(gpio_context[i].sysconfig, - bank->base + OMAP24XX_GPIO_SYSCONFIG); __raw_writel(gpio_context[i].irqenable1, bank->base + OMAP24XX_GPIO_IRQENABLE1); __raw_writel(gpio_context[i].irqenable2, @@ -2310,25 +2090,28 @@ void omap_gpio_restore_context(void) } #endif +static struct platform_driver omap_gpio_driver = { + .probe = omap_gpio_probe, + .driver = { + .name = "omap_gpio", + }, +}; + /* - * This may get called early from board specific init - * for boards that have interrupts routed via FPGA. + * gpio driver register needs to be done before + * machine_init functions access gpio APIs. + * Hence omap_gpio_drv_reg() is a postcore_initcall. */ -int __init omap_gpio_init(void) +static int __init omap_gpio_drv_reg(void) { - if (!initialized) - return _omap_gpio_init(); - else - return 0; + return platform_driver_register(&omap_gpio_driver); } +postcore_initcall(omap_gpio_drv_reg); static int __init omap_gpio_sysinit(void) { int ret = 0; - if (!initialized) - ret = _omap_gpio_init(); - mpuio_init(); #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) |