diff options
| author | Ingo Molnar <mingo@elte.hu> | 2010-04-02 20:02:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-04-02 20:03:08 +0200 |
| commit | c9494727cf293ae2ec66af57547a3e79c724fec2 (patch) | |
| tree | 44ae197b64fa7530ee695a90ad31326dda06f1e1 /drivers/gpio/wm831x-gpio.c | |
| parent | 6427462bfa50f50dc6c088c07037264fcc73eca1 (diff) | |
| parent | 42be79e37e264557f12860fa4cc84b4de3685954 (diff) | |
Merge branch 'linus' into sched/core
Merge reason: update to latest upstream
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/gpio/wm831x-gpio.c')
| -rw-r--r-- | drivers/gpio/wm831x-gpio.c | 45 |
1 files changed, 33 insertions, 12 deletions
diff --git a/drivers/gpio/wm831x-gpio.c b/drivers/gpio/wm831x-gpio.c index b4468b616890..d09021f4a7d3 100644 --- a/drivers/gpio/wm831x-gpio.c +++ b/drivers/gpio/wm831x-gpio.c @@ -38,10 +38,14 @@ static int wm831x_gpio_direction_in(struct gpio_chip *chip, unsigned offset) { struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip); struct wm831x *wm831x = wm831x_gpio->wm831x; + int val = WM831X_GPN_DIR; + + if (wm831x->has_gpio_ena) + val |= WM831X_GPN_TRI; return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + offset, - WM831X_GPN_DIR | WM831X_GPN_TRI, - WM831X_GPN_DIR); + WM831X_GPN_DIR | WM831X_GPN_TRI | + WM831X_GPN_FN_MASK, val); } static int wm831x_gpio_get(struct gpio_chip *chip, unsigned offset) @@ -60,23 +64,36 @@ static int wm831x_gpio_get(struct gpio_chip *chip, unsigned offset) return 0; } -static int wm831x_gpio_direction_out(struct gpio_chip *chip, - unsigned offset, int value) +static void wm831x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip); struct wm831x *wm831x = wm831x_gpio->wm831x; - return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + offset, - WM831X_GPN_DIR | WM831X_GPN_TRI, 0); + wm831x_set_bits(wm831x, WM831X_GPIO_LEVEL, 1 << offset, + value << offset); } -static void wm831x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +static int wm831x_gpio_direction_out(struct gpio_chip *chip, + unsigned offset, int value) { struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip); struct wm831x *wm831x = wm831x_gpio->wm831x; + int val = 0; + int ret; - wm831x_set_bits(wm831x, WM831X_GPIO_LEVEL, 1 << offset, - value << offset); + if (wm831x->has_gpio_ena) + val |= WM831X_GPN_TRI; + + ret = wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + offset, + WM831X_GPN_DIR | WM831X_GPN_TRI | + WM831X_GPN_FN_MASK, val); + if (ret < 0) + return ret; + + /* Can only set GPIO state once it's in output mode */ + wm831x_gpio_set(chip, offset, value); + + return 0; } static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) @@ -95,7 +112,7 @@ static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) { struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip); struct wm831x *wm831x = wm831x_gpio->wm831x; - int i; + int i, tristated; for (i = 0; i < chip->ngpio; i++) { int gpio = i + chip->base; @@ -162,15 +179,19 @@ static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) break; } + tristated = reg & WM831X_GPN_TRI; + if (wm831x->has_gpio_ena) + tristated = !tristated; + seq_printf(s, " %s %s %s %s%s\n" " %s%s (0x%4x)\n", reg & WM831X_GPN_DIR ? "in" : "out", wm831x_gpio_get(chip, i) ? "high" : "low", pull, powerdomain, - reg & WM831X_GPN_POL ? " inverted" : "", + reg & WM831X_GPN_POL ? "" : " inverted", reg & WM831X_GPN_OD ? "open-drain" : "CMOS", - reg & WM831X_GPN_TRI ? " tristated" : "", + tristated ? " tristated" : "", reg); } } |