diff options
author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2014-06-05 15:26:04 +0200 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2014-06-19 09:35:12 +0200 |
commit | aebdc8abc9db86e2bd33070fc2f961012fff74b4 (patch) | |
tree | 8b3488e14c7e7baf07769f89cabb27c25277a08d /drivers/pinctrl/sunxi | |
parent | c11a33c15ebc7c516551fef624efd9927da8cd81 (diff) | |
download | linux-stable-aebdc8abc9db86e2bd33070fc2f961012fff74b4.tar.gz linux-stable-aebdc8abc9db86e2bd33070fc2f961012fff74b4.tar.bz2 linux-stable-aebdc8abc9db86e2bd33070fc2f961012fff74b4.zip |
pinctrl: sunxi: Implement multiple interrupt banks support
The A23 and A31 support multiple interrupt banks. Support it by adding a linear
domain covering all the banks. It's trickier than it should because there's an
interrupt per bank, so we have multiple interrupts using the same domain.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/sunxi')
-rw-r--r-- | drivers/pinctrl/sunxi/pinctrl-sunxi.c | 65 | ||||
-rw-r--r-- | drivers/pinctrl/sunxi/pinctrl-sunxi.h | 34 |
2 files changed, 76 insertions, 23 deletions
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c index 657c4b21cda8..d989a10f7b10 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -636,17 +636,28 @@ static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc) { struct irq_chip *chip = irq_get_chip(irq); struct sunxi_pinctrl *pctl = irq_get_handler_data(irq); - const unsigned long reg = readl(pctl->membase + IRQ_STATUS_REG); + unsigned long bank, reg, val; + + for (bank = 0; bank < pctl->desc->irq_banks; bank++) + if (irq == pctl->irq[bank]) + break; + + if (bank == pctl->desc->irq_banks) + return; + + reg = sunxi_irq_status_reg_from_bank(bank); + val = readl(pctl->membase + reg); /* Clear all interrupts */ - writel(reg, pctl->membase + IRQ_STATUS_REG); + writel(val, pctl->membase + reg); - if (reg) { + if (val) { int irqoffset; chained_irq_enter(chip, desc); - for_each_set_bit(irqoffset, ®, SUNXI_IRQ_NUMBER) { - int pin_irq = irq_find_mapping(pctl->domain, irqoffset); + for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) { + int pin_irq = irq_find_mapping(pctl->domain, + bank * IRQ_PER_BANK + irqoffset); generic_handle_irq(pin_irq); } chained_irq_exit(chip, desc); @@ -714,8 +725,11 @@ static int sunxi_pinctrl_build_state(struct platform_device *pdev) while (func->name) { /* Create interrupt mapping while we're at it */ - if (!strcmp(func->name, "irq")) - pctl->irq_array[func->irqnum] = pin->pin.number; + if (!strcmp(func->name, "irq")) { + int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK; + pctl->irq_array[irqnum] = pin->pin.number; + } + sunxi_pinctrl_add_function(pctl, func->name); func++; } @@ -785,6 +799,13 @@ int sunxi_pinctrl_init(struct platform_device *pdev, pctl->dev = &pdev->dev; pctl->desc = desc; + pctl->irq_array = devm_kcalloc(&pdev->dev, + IRQ_PER_BANK * pctl->desc->irq_banks, + sizeof(*pctl->irq_array), + GFP_KERNEL); + if (!pctl->irq_array) + return -ENOMEM; + ret = sunxi_pinctrl_build_state(pdev); if (ret) { dev_err(&pdev->dev, "dt probe failed: %d\n", ret); @@ -869,21 +890,34 @@ int sunxi_pinctrl_init(struct platform_device *pdev, if (ret) goto gpiochip_error; - pctl->irq = irq_of_parse_and_map(node, 0); + pctl->irq = devm_kcalloc(&pdev->dev, + pctl->desc->irq_banks, + sizeof(*pctl->irq), + GFP_KERNEL); if (!pctl->irq) { - ret = -EINVAL; + ret = -ENOMEM; goto clk_error; } - pctl->domain = irq_domain_add_linear(node, SUNXI_IRQ_NUMBER, - &irq_domain_simple_ops, NULL); + for (i = 0; i < pctl->desc->irq_banks; i++) { + pctl->irq[i] = platform_get_irq(pdev, i); + if (pctl->irq[i] < 0) { + ret = pctl->irq[i]; + goto clk_error; + } + } + + pctl->domain = irq_domain_add_linear(node, + pctl->desc->irq_banks * IRQ_PER_BANK, + &irq_domain_simple_ops, + NULL); if (!pctl->domain) { dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); ret = -ENOMEM; goto clk_error; } - for (i = 0; i < SUNXI_IRQ_NUMBER; i++) { + for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) { int irqno = irq_create_mapping(pctl->domain, i); irq_set_chip_and_handler(irqno, &sunxi_pinctrl_irq_chip, @@ -891,8 +925,11 @@ int sunxi_pinctrl_init(struct platform_device *pdev, irq_set_chip_data(irqno, pctl); }; - irq_set_chained_handler(pctl->irq, sunxi_pinctrl_irq_handler); - irq_set_handler_data(pctl->irq, pctl); + for (i = 0; i < pctl->desc->irq_banks; i++) { + irq_set_chained_handler(pctl->irq[i], + sunxi_pinctrl_irq_handler); + irq_set_handler_data(pctl->irq[i], pctl); + } dev_info(&pdev->dev, "initialized sunXi PIO driver\n"); diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h index 7ddcce0f3c27..4245b96c7996 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h @@ -53,7 +53,7 @@ #define PULL_PINS_BITS 2 #define PULL_PINS_MASK 0x03 -#define SUNXI_IRQ_NUMBER 32 +#define IRQ_PER_BANK 32 #define IRQ_CFG_REG 0x200 #define IRQ_CFG_IRQ_PER_REG 8 @@ -68,6 +68,8 @@ #define IRQ_STATUS_IRQ_BITS 1 #define IRQ_STATUS_IRQ_MASK ((1 << IRQ_STATUS_IRQ_BITS) - 1) +#define IRQ_MEM_SIZE 0x20 + #define IRQ_EDGE_RISING 0x00 #define IRQ_EDGE_FALLING 0x01 #define IRQ_LEVEL_HIGH 0x02 @@ -115,8 +117,8 @@ struct sunxi_pinctrl { unsigned nfunctions; struct sunxi_pinctrl_group *groups; unsigned ngroups; - int irq; - int irq_array[SUNXI_IRQ_NUMBER]; + int *irq; + unsigned *irq_array; spinlock_t lock; struct pinctrl_dev *pctl_dev; }; @@ -228,8 +230,10 @@ static inline u32 sunxi_pull_offset(u16 pin) static inline u32 sunxi_irq_cfg_reg(u16 irq) { - u8 reg = irq / IRQ_CFG_IRQ_PER_REG * 0x04; - return reg + IRQ_CFG_REG; + u8 bank = irq / IRQ_PER_BANK; + u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04; + + return IRQ_CFG_REG + bank * IRQ_MEM_SIZE + reg; } static inline u32 sunxi_irq_cfg_offset(u16 irq) @@ -238,10 +242,16 @@ static inline u32 sunxi_irq_cfg_offset(u16 irq) return irq_num * IRQ_CFG_IRQ_BITS; } +static inline u32 sunxi_irq_ctrl_reg_from_bank(u8 bank) +{ + return IRQ_CTRL_REG + bank * IRQ_MEM_SIZE; +} + static inline u32 sunxi_irq_ctrl_reg(u16 irq) { - u8 reg = irq / IRQ_CTRL_IRQ_PER_REG * 0x04; - return reg + IRQ_CTRL_REG; + u8 bank = irq / IRQ_PER_BANK; + + return sunxi_irq_ctrl_reg_from_bank(bank); } static inline u32 sunxi_irq_ctrl_offset(u16 irq) @@ -250,10 +260,16 @@ static inline u32 sunxi_irq_ctrl_offset(u16 irq) return irq_num * IRQ_CTRL_IRQ_BITS; } +static inline u32 sunxi_irq_status_reg_from_bank(u8 bank) +{ + return IRQ_STATUS_REG + bank * IRQ_MEM_SIZE; +} + static inline u32 sunxi_irq_status_reg(u16 irq) { - u8 reg = irq / IRQ_STATUS_IRQ_PER_REG * 0x04; - return reg + IRQ_STATUS_REG; + u8 bank = irq / IRQ_PER_BANK; + + return sunxi_irq_status_reg_from_bank(bank); } static inline u32 sunxi_irq_status_offset(u16 irq) |