diff options
| -rw-r--r-- | drivers/gpio/gpio-sch.c | 83 |
1 files changed, 29 insertions, 54 deletions
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c index 0271022a66f6..b72906f5b999 100644 --- a/drivers/gpio/gpio-sch.c +++ b/drivers/gpio/gpio-sch.c @@ -41,7 +41,7 @@ struct sch_gpio { unsigned short resume_base; }; -#define to_sch_gpio(c) container_of(c, struct sch_gpio, chip) +#define to_sch_gpio(gc) container_of(gc, struct sch_gpio, chip) static unsigned sch_gpio_offset(struct sch_gpio *sch, unsigned gpio, unsigned reg) @@ -63,75 +63,59 @@ static unsigned sch_gpio_bit(struct sch_gpio *sch, unsigned gpio) return gpio % 8; } -static void sch_gpio_enable(struct sch_gpio *sch, unsigned gpio) +static int sch_gpio_reg_get(struct gpio_chip *gc, unsigned gpio, unsigned reg) { + struct sch_gpio *sch = to_sch_gpio(gc); unsigned short offset, bit; - u8 enable; - - spin_lock(&sch->lock); + u8 reg_val; - offset = sch_gpio_offset(sch, gpio, GEN); + offset = sch_gpio_offset(sch, gpio, reg); bit = sch_gpio_bit(sch, gpio); - enable = inb(sch->iobase + offset); - if (!(enable & (1 << bit))) - outb(enable | (1 << bit), sch->iobase + offset); + reg_val = !!(inb(sch->iobase + offset) & BIT(bit)); - spin_unlock(&sch->lock); + return reg_val; } -static int sch_gpio_direction_in(struct gpio_chip *gc, unsigned gpio_num) +static void sch_gpio_reg_set(struct gpio_chip *gc, unsigned gpio, unsigned reg, + int val) { struct sch_gpio *sch = to_sch_gpio(gc); - u8 curr_dirs; unsigned short offset, bit; + u8 reg_val; - spin_lock(&sch->lock); + offset = sch_gpio_offset(sch, gpio, reg); + bit = sch_gpio_bit(sch, gpio); - offset = sch_gpio_offset(sch, gpio_num, GIO); - bit = sch_gpio_bit(sch, gpio_num); + reg_val = inb(sch->iobase + offset); - curr_dirs = inb(sch->iobase + offset); + if (val) + outb(reg_val | BIT(bit), sch->iobase + offset); + else + outb((reg_val & ~BIT(bit)), sch->iobase + offset); +} - if (!(curr_dirs & (1 << bit))) - outb(curr_dirs | (1 << bit), sch->iobase + offset); +static int sch_gpio_direction_in(struct gpio_chip *gc, unsigned gpio_num) +{ + struct sch_gpio *sch = to_sch_gpio(gc); + spin_lock(&sch->lock); + sch_gpio_reg_set(gc, gpio_num, GIO, 1); spin_unlock(&sch->lock); return 0; } static int sch_gpio_get(struct gpio_chip *gc, unsigned gpio_num) { - struct sch_gpio *sch = to_sch_gpio(gc); - int res; - unsigned short offset, bit; - - offset = sch_gpio_offset(sch, gpio_num, GLV); - bit = sch_gpio_bit(sch, gpio_num); - - res = !!(inb(sch->iobase + offset) & (1 << bit)); - - return res; + return sch_gpio_reg_get(gc, gpio_num, GLV); } static void sch_gpio_set(struct gpio_chip *gc, unsigned gpio_num, int val) { struct sch_gpio *sch = to_sch_gpio(gc); - u8 curr_vals; - unsigned short offset, bit; spin_lock(&sch->lock); - - offset = sch_gpio_offset(sch, gpio_num, GLV); - bit = sch_gpio_bit(sch, gpio_num); - - curr_vals = inb(sch->iobase + offset); - - if (val) - outb(curr_vals | (1 << bit), sch->iobase + offset); - else - outb((curr_vals & ~(1 << bit)), sch->iobase + offset); - + sch_gpio_reg_set(gc, gpio_num, GLV, val); spin_unlock(&sch->lock); } @@ -139,18 +123,9 @@ static int sch_gpio_direction_out(struct gpio_chip *gc, unsigned gpio_num, int val) { struct sch_gpio *sch = to_sch_gpio(gc); - u8 curr_dirs; - unsigned short offset, bit; spin_lock(&sch->lock); - - offset = sch_gpio_offset(sch, gpio_num, GIO); - bit = sch_gpio_bit(sch, gpio_num); - - curr_dirs = inb(sch->iobase + offset); - if (curr_dirs & (1 << bit)) - outb(curr_dirs & ~(1 << bit), sch->iobase + offset); - + sch_gpio_reg_set(gc, gpio_num, GIO, 0); spin_unlock(&sch->lock); /* @@ -209,13 +184,13 @@ static int sch_gpio_probe(struct platform_device *pdev) * GPIO7 is configured by the CMC as SLPIOVR * Enable GPIO[9:8] core powered gpios explicitly */ - sch_gpio_enable(sch, 8); - sch_gpio_enable(sch, 9); + sch_gpio_reg_set(&sch->chip, 8, GEN, 1); + sch_gpio_reg_set(&sch->chip, 9, GEN, 1); /* * SUS_GPIO[2:0] enabled by default * Enable SUS_GPIO3 resume powered gpio explicitly */ - sch_gpio_enable(sch, 13); + sch_gpio_reg_set(&sch->chip, 13, GEN, 1); break; case PCI_DEVICE_ID_INTEL_ITC_LPC: |