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Commit d0ad5e89 authored by Mark Brown's avatar Mark Brown Committed by Grant Likely
Browse files

gpio: Add decode of WM8994 GPIO configuration 



For the human reader.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 6f61415e

drivers/gpio/gpio-wm8994.c

+77 −2
Original line number Diff line number Diff line
@@ -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