diff options
author | Russell King <rmk+kernel@armlinux.org.uk> | 2016-08-31 08:49:44 +0100 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-24 14:04:26 +0100 |
commit | 07242b248119a9388a67975aa7fae7c23afc7a07 (patch) | |
tree | 4a85668d0997c2ce88367a410e80bd7ca2bee72c /drivers/gpio | |
parent | 9dd4819ed58a7f1702d5ba737507d0fef96e68c8 (diff) | |
download | linux-stable-07242b248119a9388a67975aa7fae7c23afc7a07.tar.gz linux-stable-07242b248119a9388a67975aa7fae7c23afc7a07.tar.bz2 linux-stable-07242b248119a9388a67975aa7fae7c23afc7a07.zip |
gpio: sa1100: convert to use IO accessors
Use IO accessors to access the SA1100 registers rather than accessing
them directly.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r-- | drivers/gpio/gpio-sa1100.c | 199 |
1 files changed, 124 insertions, 75 deletions
diff --git a/drivers/gpio/gpio-sa1100.c b/drivers/gpio/gpio-sa1100.c index fb9d52a57d78..bad0169524c9 100644 --- a/drivers/gpio/gpio-sa1100.c +++ b/drivers/gpio/gpio-sa1100.c @@ -16,54 +16,85 @@ #include <mach/hardware.h> #include <mach/irqs.h> +struct sa1100_gpio_chip { + struct gpio_chip chip; + void __iomem *membase; + int irqbase; + u32 irqmask; + u32 irqrising; + u32 irqfalling; + u32 irqwake; +}; + +#define sa1100_gpio_chip(x) container_of(x, struct sa1100_gpio_chip, chip) + +enum { + R_GPLR = 0x00, + R_GPDR = 0x04, + R_GPSR = 0x08, + R_GPCR = 0x0c, + R_GRER = 0x10, + R_GFER = 0x14, + R_GEDR = 0x18, + R_GAFR = 0x1c, +}; + static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset) { - return !!(GPLR & GPIO_GPIO(offset)); + return readl_relaxed(sa1100_gpio_chip(chip)->membase + R_GPLR) & + BIT(offset); } static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { - if (value) - GPSR = GPIO_GPIO(offset); - else - GPCR = GPIO_GPIO(offset); + int reg = value ? R_GPSR : R_GPCR; + + writel_relaxed(BIT(offset), sa1100_gpio_chip(chip)->membase + reg); } static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset) { + void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR; unsigned long flags; local_irq_save(flags); - GPDR &= ~GPIO_GPIO(offset); + writel_relaxed(readl_relaxed(gpdr) & ~BIT(offset), gpdr); local_irq_restore(flags); + return 0; } static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value) { + void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR; unsigned long flags; local_irq_save(flags); sa1100_gpio_set(chip, offset, value); - GPDR |= GPIO_GPIO(offset); + writel_relaxed(readl_relaxed(gpdr) | BIT(offset), gpdr); local_irq_restore(flags); + return 0; } static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset) { - return IRQ_GPIO0 + offset; + return sa1100_gpio_chip(chip)->irqbase + offset; } -static struct gpio_chip sa1100_gpio_chip = { - .label = "gpio", - .direction_input = sa1100_direction_input, - .direction_output = sa1100_direction_output, - .set = sa1100_gpio_set, - .get = sa1100_gpio_get, - .to_irq = sa1100_to_irq, - .base = 0, - .ngpio = GPIO_MAX + 1, +static struct sa1100_gpio_chip sa1100_gpio_chip = { + .chip = { + .label = "gpio", + .direction_input = sa1100_direction_input, + .direction_output = sa1100_direction_output, + .set = sa1100_gpio_set, + .get = sa1100_gpio_get, + .to_irq = sa1100_to_irq, + .base = 0, + .ngpio = GPIO_MAX + 1, + }, + .membase = (void *)&GPLR, + .irqbase = IRQ_GPIO0, }; /* @@ -71,34 +102,39 @@ static struct gpio_chip sa1100_gpio_chip = { * IRQs are generated on Falling-Edge, Rising-Edge, or both. * Use this instead of directly setting GRER/GFER. */ -static int GPIO_IRQ_rising_edge; -static int GPIO_IRQ_falling_edge; -static int GPIO_IRQ_mask; -static int GPIO_IRQ_wake; +static void sa1100_update_edge_regs(struct sa1100_gpio_chip *sgc) +{ + void *base = sgc->membase; + u32 grer, gfer; + + grer = sgc->irqrising & sgc->irqmask; + gfer = sgc->irqfalling & sgc->irqmask; + + writel_relaxed(grer, base + R_GRER); + writel_relaxed(gfer, base + R_GFER); +} static int sa1100_gpio_type(struct irq_data *d, unsigned int type) { - unsigned int mask; - - mask = BIT(d->hwirq); + struct sa1100_gpio_chip *sgc = irq_data_get_irq_chip_data(d); + unsigned int mask = BIT(d->hwirq); if (type == IRQ_TYPE_PROBE) { - if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask) + if ((sgc->irqrising | sgc->irqfalling) & mask) return 0; type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; } if (type & IRQ_TYPE_EDGE_RISING) - GPIO_IRQ_rising_edge |= mask; + sgc->irqrising |= mask; else - GPIO_IRQ_rising_edge &= ~mask; + sgc->irqrising &= ~mask; if (type & IRQ_TYPE_EDGE_FALLING) - GPIO_IRQ_falling_edge |= mask; + sgc->irqfalling |= mask; else - GPIO_IRQ_falling_edge &= ~mask; + sgc->irqfalling &= ~mask; - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; + sa1100_update_edge_regs(sgc); return 0; } @@ -108,37 +144,40 @@ static int sa1100_gpio_type(struct irq_data *d, unsigned int type) */ static void sa1100_gpio_ack(struct irq_data *d) { - GEDR = BIT(d->hwirq); + struct sa1100_gpio_chip *sgc = irq_data_get_irq_chip_data(d); + + writel_relaxed(BIT(d->hwirq), sgc->membase + R_GEDR); } static void sa1100_gpio_mask(struct irq_data *d) { + struct sa1100_gpio_chip *sgc = irq_data_get_irq_chip_data(d); unsigned int mask = BIT(d->hwirq); - GPIO_IRQ_mask &= ~mask; + sgc->irqmask &= ~mask; - GRER &= ~mask; - GFER &= ~mask; + sa1100_update_edge_regs(sgc); } static void sa1100_gpio_unmask(struct irq_data *d) { + struct sa1100_gpio_chip *sgc = irq_data_get_irq_chip_data(d); unsigned int mask = BIT(d->hwirq); - GPIO_IRQ_mask |= mask; + sgc->irqmask |= mask; - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; + sa1100_update_edge_regs(sgc); } static int sa1100_gpio_wake(struct irq_data *d, unsigned int on) { + struct sa1100_gpio_chip *sgc = irq_data_get_irq_chip_data(d); int ret = sa11x0_gpio_set_wake(d->hwirq, on); if (!ret) { if (on) - GPIO_IRQ_wake |= BIT(d->hwirq); + sgc->irqwake |= BIT(d->hwirq); else - GPIO_IRQ_wake &= ~BIT(d->hwirq); + sgc->irqwake &= ~BIT(d->hwirq); } return ret; } @@ -158,8 +197,10 @@ static struct irq_chip sa1100_gpio_irq_chip = { static int sa1100_gpio_irqdomain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) { - irq_set_chip_and_handler(irq, &sa1100_gpio_irq_chip, - handle_edge_irq); + struct sa1100_gpio_chip *sgc = d->host_data; + + irq_set_chip_data(irq, sgc); + irq_set_chip_and_handler(irq, &sa1100_gpio_irq_chip, handle_edge_irq); irq_set_probe(irq); return 0; @@ -179,17 +220,19 @@ static struct irq_domain *sa1100_gpio_irqdomain; */ static void sa1100_gpio_handler(struct irq_desc *desc) { + struct sa1100_gpio_chip *sgc = irq_desc_get_handler_data(desc); unsigned int irq, mask; + void __iomem *gedr = sgc->membase + R_GEDR; - mask = GEDR; + mask = readl_relaxed(gedr); do { /* * clear down all currently active IRQ sources. * We will be processing them all. */ - GEDR = mask; + writel_relaxed(mask, gedr); - irq = IRQ_GPIO0; + irq = sgc->irqbase; do { if (mask & 1) generic_handle_irq(irq); @@ -197,30 +240,32 @@ static void sa1100_gpio_handler(struct irq_desc *desc) irq++; } while (mask); - mask = GEDR; + mask = readl_relaxed(gedr); } while (mask); } static int sa1100_gpio_suspend(void) { + struct sa1100_gpio_chip *sgc = &sa1100_gpio_chip; + /* * Set the appropriate edges for wakeup. */ - GRER = GPIO_IRQ_wake & GPIO_IRQ_rising_edge; - GFER = GPIO_IRQ_wake & GPIO_IRQ_falling_edge; + writel_relaxed(sgc->irqwake & sgc->irqrising, sgc->membase + R_GRER); + writel_relaxed(sgc->irqwake & sgc->irqfalling, sgc->membase + R_GFER); /* * Clear any pending GPIO interrupts. */ - GEDR = GEDR; + writel_relaxed(readl_relaxed(sgc->membase + R_GEDR), + sgc->membase + R_GEDR); return 0; } static void sa1100_gpio_resume(void) { - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; + sa1100_update_edge_regs(&sa1100_gpio_chip); } static struct syscore_ops sa1100_gpio_syscore_ops = { @@ -236,36 +281,40 @@ static int __init sa1100_gpio_init_devicefs(void) device_initcall(sa1100_gpio_init_devicefs); +static const int sa1100_gpio_irqs[] __initconst = { + /* Install handlers for GPIO 0-10 edge detect interrupts */ + IRQ_GPIO0_SC, + IRQ_GPIO1_SC, + IRQ_GPIO2_SC, + IRQ_GPIO3_SC, + IRQ_GPIO4_SC, + IRQ_GPIO5_SC, + IRQ_GPIO6_SC, + IRQ_GPIO7_SC, + IRQ_GPIO8_SC, + IRQ_GPIO9_SC, + IRQ_GPIO10_SC, + /* Install handler for GPIO 11-27 edge detect interrupts */ + IRQ_GPIO11_27, +}; + void __init sa1100_init_gpio(void) { + struct sa1100_gpio_chip *sgc = &sa1100_gpio_chip; + int i; + /* clear all GPIO edge detects */ - GFER = 0; - GRER = 0; - GEDR = -1; + writel_relaxed(0, sgc->membase + R_GFER); + writel_relaxed(0, sgc->membase + R_GRER); + writel_relaxed(-1, sgc->membase + R_GEDR); - gpiochip_add_data(&sa1100_gpio_chip, NULL); + gpiochip_add_data(&sa1100_gpio_chip.chip, NULL); sa1100_gpio_irqdomain = irq_domain_add_simple(NULL, 28, IRQ_GPIO0, - &sa1100_gpio_irqdomain_ops, NULL); - - /* - * Install handlers for GPIO 0-10 edge detect interrupts - */ - irq_set_chained_handler(IRQ_GPIO0_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO1_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO2_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO3_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO4_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO5_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO6_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO7_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO8_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO9_SC, sa1100_gpio_handler); - irq_set_chained_handler(IRQ_GPIO10_SC, sa1100_gpio_handler); - /* - * Install handler for GPIO 11-27 edge detect interrupts - */ - irq_set_chained_handler(IRQ_GPIO11_27, sa1100_gpio_handler); + &sa1100_gpio_irqdomain_ops, sgc); + for (i = 0; i < ARRAY_SIZE(sa1100_gpio_irqs); i++) + irq_set_chained_handler_and_data(sa1100_gpio_irqs[i], + sa1100_gpio_handler, sgc); } |