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Subject[PATCH 4/4] gpio: Add decode of WM8994 GPIO configuration
Date
For the human reader.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
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 96198f3..92ea535 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
--
1.7.7.3


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