diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-12-07 20:24:01 +0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-01-02 11:27:01 +0400 |
| commit | d0ad5e89256c351ddd40167152c24a88efcb0f6d (patch) | |
| tree | b95b6022bbda6e49e56f1517f5b5a08d28e6dbeb | |
| parent | 6f61415e9c4c0ab02c8eda7671bb652db4863cc0 (diff) | |
| download | linux-d0ad5e89256c351ddd40167152c24a88efcb0f6d.tar.xz | |
gpio: Add decode of WM8994 GPIO configuration
For the human reader.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/gpio/gpio-wm8994.c | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c index 96198f3fab73..92ea5350dfe9 100644 --- a/drivers/gpio/gpio-wm8994.c +++ b/drivers/gpio/gpio-wm8994.c @@ -117,6 +117,60 @@ static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset) #ifdef CONFIG_DEBUG_FS +static const char *wm8994_gpio_fn(u16 fn) +{ + switch (fn) { + case WM8994_GP_FN_PIN_SPECIFIC: + return "pin-specific"; + case WM8994_GP_FN_GPIO: + return "GPIO"; + case WM8994_GP_FN_SDOUT: + return "SDOUT"; + case WM8994_GP_FN_IRQ: + return "IRQ"; + case WM8994_GP_FN_TEMPERATURE: + return "Temperature"; + case WM8994_GP_FN_MICBIAS1_DET: + return "MICBIAS1 detect"; + case WM8994_GP_FN_MICBIAS1_SHORT: + return "MICBIAS1 short"; + case WM8994_GP_FN_MICBIAS2_DET: + return "MICBIAS2 detect"; + case WM8994_GP_FN_MICBIAS2_SHORT: + return "MICBIAS2 short"; + case WM8994_GP_FN_FLL1_LOCK: + return "FLL1 lock"; + case WM8994_GP_FN_FLL2_LOCK: + return "FLL2 lock"; + case WM8994_GP_FN_SRC1_LOCK: + return "SRC1 lock"; + case WM8994_GP_FN_SRC2_LOCK: + return "SRC2 lock"; + case WM8994_GP_FN_DRC1_ACT: + return "DRC1 activity"; + case WM8994_GP_FN_DRC2_ACT: + return "DRC2 activity"; + case WM8994_GP_FN_DRC3_ACT: + return "DRC3 activity"; + case WM8994_GP_FN_WSEQ_STATUS: + return "Write sequencer"; + case WM8994_GP_FN_FIFO_ERROR: + return "FIFO error"; + case WM8994_GP_FN_OPCLK: + return "OPCLK"; + case WM8994_GP_FN_THW: + return "Thermal warning"; + case WM8994_GP_FN_DCS_DONE: + return "DC servo"; + case WM8994_GP_FN_FLL1_OUT: + return "FLL1 output"; + case WM8994_GP_FN_FLL2_OUT: + return "FLL1 output"; + default: + return "Unknown"; + } +} + static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) { struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); @@ -148,8 +202,29 @@ static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) continue; } - /* No decode yet; note that GPIO2 is special */ - seq_printf(s, "(%x)\n", reg); + if (reg & WM8994_GPN_DIR) + seq_printf(s, "in "); + else + seq_printf(s, "out "); + + if (reg & WM8994_GPN_PU) + seq_printf(s, "pull up "); + + if (reg & WM8994_GPN_PD) + seq_printf(s, "pull down "); + + if (reg & WM8994_GPN_POL) + seq_printf(s, "inverted "); + else + seq_printf(s, "noninverted "); + + if (reg & WM8994_GPN_OP_CFG) + seq_printf(s, "open drain "); + else + seq_printf(s, "CMOS "); + + seq_printf(s, "%s (%x)\n", + wm8994_gpio_fn(reg & WM8994_GPN_FN_MASK), reg); } } #else |