diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-davinci.c | 132 | ||||
| -rw-r--r-- | drivers/gpio/gpio-tnetv107x.c | 1 |
2 files changed, 91 insertions, 42 deletions
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 17df6db5dca7..8847adf392b7 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -15,8 +15,9 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> - -#include <asm/mach/irq.h> +#include <linux/irq.h> +#include <linux/platform_device.h> +#include <linux/platform_data/gpio-davinci.h> struct davinci_gpio_regs { u32 dir; @@ -31,13 +32,14 @@ struct davinci_gpio_regs { u32 intstat; }; +#define BINTEN 0x8 /* GPIO Interrupt Per-Bank Enable Register */ + #define chip2controller(chip) \ container_of(chip, struct davinci_gpio_controller, chip) -static struct davinci_gpio_controller chips[DIV_ROUND_UP(DAVINCI_N_GPIO, 32)]; static void __iomem *gpio_base; -static struct davinci_gpio_regs __iomem __init *gpio2regs(unsigned gpio) +static struct davinci_gpio_regs __iomem *gpio2regs(unsigned gpio) { void __iomem *ptr; @@ -65,7 +67,7 @@ static inline struct davinci_gpio_regs __iomem *irq2regs(int irq) return g; } -static int __init davinci_gpio_irq_setup(void); +static int davinci_gpio_irq_setup(struct platform_device *pdev); /*--------------------------------------------------------------------------*/ @@ -131,33 +133,53 @@ davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value) __raw_writel((1 << offset), value ? &g->set_data : &g->clr_data); } -static int __init davinci_gpio_setup(void) +static int davinci_gpio_probe(struct platform_device *pdev) { int i, base; unsigned ngpio; - struct davinci_soc_info *soc_info = &davinci_soc_info; - struct davinci_gpio_regs *regs; - - if (soc_info->gpio_type != GPIO_TYPE_DAVINCI) - return 0; + struct davinci_gpio_controller *chips; + struct davinci_gpio_platform_data *pdata; + struct davinci_gpio_regs __iomem *regs; + struct device *dev = &pdev->dev; + struct resource *res; + + pdata = dev->platform_data; + if (!pdata) { + dev_err(dev, "No platform data found\n"); + return -EINVAL; + } /* * The gpio banks conceptually expose a segmented bitmap, * and "ngpio" is one more than the largest zero-based * bit index that's valid. */ - ngpio = soc_info->gpio_num; + ngpio = pdata->ngpio; if (ngpio == 0) { - pr_err("GPIO setup: how many GPIOs?\n"); + dev_err(dev, "How many GPIOs?\n"); return -EINVAL; } if (WARN_ON(DAVINCI_N_GPIO < ngpio)) ngpio = DAVINCI_N_GPIO; - gpio_base = ioremap(soc_info->gpio_base, SZ_4K); - if (WARN_ON(!gpio_base)) + chips = devm_kzalloc(dev, + ngpio * sizeof(struct davinci_gpio_controller), + GFP_KERNEL); + if (!chips) { + dev_err(dev, "Memory allocation failed\n"); return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "Invalid memory resource\n"); + return -EBUSY; + } + + gpio_base = devm_ioremap_resource(dev, res); + if (IS_ERR(gpio_base)) + return PTR_ERR(gpio_base); for (i = 0, base = 0; base < ngpio; i++, base += 32) { chips[i].chip.label = "DaVinci"; @@ -183,13 +205,10 @@ static int __init davinci_gpio_setup(void) gpiochip_add(&chips[i].chip); } - soc_info->gpio_ctlrs = chips; - soc_info->gpio_ctlrs_num = DIV_ROUND_UP(ngpio, 32); - - davinci_gpio_irq_setup(); + platform_set_drvdata(pdev, chips); + davinci_gpio_irq_setup(pdev); return 0; } -pure_initcall(davinci_gpio_setup); /*--------------------------------------------------------------------------*/ /* @@ -302,13 +321,14 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset) static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset) { - struct davinci_soc_info *soc_info = &davinci_soc_info; + struct davinci_gpio_controller *d = chip2controller(chip); - /* NOTE: we assume for now that only irqs in the first gpio_chip + /* + * NOTE: we assume for now that only irqs in the first gpio_chip * can provide direct-mapped IRQs to AINTC (up to 32 GPIOs). */ - if (offset < soc_info->gpio_unbanked) - return soc_info->gpio_irq + offset; + if (offset < d->irq_base) + return d->gpio_irq + offset; else return -ENODEV; } @@ -317,12 +337,11 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger) { struct davinci_gpio_controller *d; struct davinci_gpio_regs __iomem *g; - struct davinci_soc_info *soc_info = &davinci_soc_info; u32 mask; d = (struct davinci_gpio_controller *)data->handler_data; g = (struct davinci_gpio_regs __iomem *)d->regs; - mask = __gpio_mask(data->irq - soc_info->gpio_irq); + mask = __gpio_mask(data->irq - d->gpio_irq); if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) return -EINVAL; @@ -343,24 +362,33 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger) * (dm6446) can be set appropriately for GPIOV33 pins. */ -static int __init davinci_gpio_irq_setup(void) +static int davinci_gpio_irq_setup(struct platform_device *pdev) { unsigned gpio, irq, bank; struct clk *clk; u32 binten = 0; unsigned ngpio, bank_irq; - struct davinci_soc_info *soc_info = &davinci_soc_info; - struct davinci_gpio_regs __iomem *g; + struct device *dev = &pdev->dev; + struct resource *res; + struct davinci_gpio_controller *chips = platform_get_drvdata(pdev); + struct davinci_gpio_platform_data *pdata = dev->platform_data; + struct davinci_gpio_regs __iomem *g; - ngpio = soc_info->gpio_num; + ngpio = pdata->ngpio; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(dev, "Invalid IRQ resource\n"); + return -EBUSY; + } - bank_irq = soc_info->gpio_irq; - if (bank_irq == 0) { - printk(KERN_ERR "Don't know first GPIO bank IRQ.\n"); - return -EINVAL; + bank_irq = res->start; + + if (!bank_irq) { + dev_err(dev, "Invalid IRQ resource\n"); + return -ENODEV; } - clk = clk_get(NULL, "gpio"); + clk = devm_clk_get(dev, "gpio"); if (IS_ERR(clk)) { printk(KERN_ERR "Error %ld getting gpio clock?\n", PTR_ERR(clk)); @@ -368,16 +396,17 @@ static int __init davinci_gpio_irq_setup(void) } clk_prepare_enable(clk); - /* Arrange gpio_to_irq() support, handling either direct IRQs or + /* + * Arrange gpio_to_irq() support, handling either direct IRQs or * banked IRQs. Having GPIOs in the first GPIO bank use direct * IRQs, while the others use banked IRQs, would need some setup * tweaks to recognize hardware which can do that. */ for (gpio = 0, bank = 0; gpio < ngpio; bank++, gpio += 32) { chips[bank].chip.to_irq = gpio_to_irq_banked; - chips[bank].irq_base = soc_info->gpio_unbanked + chips[bank].irq_base = pdata->gpio_unbanked ? -EINVAL - : (soc_info->intc_irq_num + gpio); + : (pdata->intc_irq_num + gpio); } /* @@ -385,7 +414,7 @@ static int __init davinci_gpio_irq_setup(void) * controller only handling trigger modes. We currently assume no * IRQ mux conflicts; gpio_irq_type_unbanked() is only for GPIOs. */ - if (soc_info->gpio_unbanked) { + if (pdata->gpio_unbanked) { static struct irq_chip_type gpio_unbanked; /* pass "bank 0" GPIO IRQs to AINTC */ @@ -405,7 +434,7 @@ static int __init davinci_gpio_irq_setup(void) __raw_writel(~0, &g->set_rising); /* set the direct IRQs up to use that irqchip */ - for (gpio = 0; gpio < soc_info->gpio_unbanked; gpio++, irq++) { + for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++, irq++) { irq_set_chip(irq, &gpio_unbanked.chip); irq_set_handler_data(irq, &chips[gpio / 32]); irq_set_status_flags(irq, IRQ_TYPE_EDGE_BOTH); @@ -450,12 +479,31 @@ static int __init davinci_gpio_irq_setup(void) } done: - /* BINTEN -- per-bank interrupt enable. genirq would also let these + /* + * BINTEN -- per-bank interrupt enable. genirq would also let these * bits be set/cleared dynamically. */ - __raw_writel(binten, gpio_base + 0x08); + __raw_writel(binten, gpio_base + BINTEN); printk(KERN_INFO "DaVinci: %d gpio irqs\n", irq - gpio_to_irq(0)); return 0; } + +static struct platform_driver davinci_gpio_driver = { + .probe = davinci_gpio_probe, + .driver = { + .name = "davinci_gpio", + .owner = THIS_MODULE, + }, +}; + +/** + * GPIO driver registration needs to be done before machine_init functions + * access GPIO. Hence davinci_gpio_drv_reg() is a postcore_initcall. + */ +static int __init davinci_gpio_drv_reg(void) +{ + return platform_driver_register(&davinci_gpio_driver); +} +postcore_initcall(davinci_gpio_drv_reg); diff --git a/drivers/gpio/gpio-tnetv107x.c b/drivers/gpio/gpio-tnetv107x.c index 3fa3e2867e19..58445bb69106 100644 --- a/drivers/gpio/gpio-tnetv107x.c +++ b/drivers/gpio/gpio-tnetv107x.c @@ -15,6 +15,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/gpio.h> +#include <linux/platform_data/gpio-davinci.h> #include <mach/common.h> #include <mach/tnetv107x.h> |
