pinctrl: lynxpoint: Implement ->pin_dbg_show()

The introduced callback ->pin_dbg_show() is useful for debugging.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
index c209deff9efb2096b87874d0004558186fdf5d2b..bfdd283d2c20f40ad4f6d0a4e78818ce58c900aa 100644 (file)
--- a/drivers/pinctrl/intel/pinctrl-lynxpoint.c
+++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
@@ -297,10 +297,33 @@ static int lp_get_group_pins(struct pinctrl_dev *pctldev,
        return 0;
 }
 
+static void lp_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+                           unsigned int pin)
+{
+       struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+       void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+       void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+       u32 value, mode;
+
+       value = ioread32(reg);
+
+       mode = value & USE_SEL_MASK;
+       if (mode == USE_SEL_GPIO)
+               seq_puts(s, "GPIO ");
+       else
+               seq_printf(s, "mode %d ", mode);
+
+       seq_printf(s, "0x%08x 0x%08x", value, ioread32(conf2));
+
+       if (lp_gpio_acpi_use(lg, pin))
+               seq_puts(s, " [ACPI]");
+}
+
 static const struct pinctrl_ops lptlp_pinctrl_ops = {
        .get_groups_count       = lp_get_groups_count,
        .get_group_name         = lp_get_group_name,
        .get_group_pins         = lp_get_group_pins,
+       .pin_dbg_show           = lp_pin_dbg_show,
 };
 
 static int lp_get_functions_count(struct pinctrl_dev *pctldev)