From: Neil Armstrong <narmstrong@baylibre.com>
Date: Tue, 4 Jun 2019 09:04:54 +0000 (+0200)
Subject: pinctrl: meson-axg: add support for getting pinmux status
X-Git-Tag: v2019.07~33^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b9308f2c05906b41dabb1941a384a70dbabdc40f;p=platform%2Fkernel%2Fu-boot.git

pinctrl: meson-axg: add support for getting pinmux status

In order to support the "pinmux status" command, use the common functions
to get the pins count and names, and add the AXG specific function to get
the current function from registers.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---

diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
index f23b188..10b070e 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.c
@@ -93,6 +93,51 @@ static int meson_axg_pinmux_group_set(struct udevice *dev,
 	return 0;
 }
 
+static int meson_axg_pinmux_get(struct udevice *dev, unsigned int selector,
+				char *buf, int size)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+	struct meson_pmx_axg_data *pmx_data;
+	struct meson_pmx_group *group;
+	struct meson_pmx_bank *bank;
+	unsigned int offset;
+	unsigned int func;
+	unsigned int reg;
+	int ret, i, j;
+
+	selector += priv->data->pin_base;
+
+	ret = meson_axg_pmx_get_bank(dev, selector, &bank);
+	if (ret) {
+		snprintf(buf, size, "Unhandled");
+		return 0;
+	}
+
+	meson_axg_pmx_calc_reg_and_offset(bank, selector, &reg, &offset);
+
+	func = (readl(priv->reg_mux + (reg << 2)) >> offset) & 0xf;
+
+	for (i = 0; i < priv->data->num_groups; i++) {
+		group = &priv->data->groups[i];
+		pmx_data = (struct meson_pmx_axg_data *)group->data;
+
+		if (pmx_data->func != func)
+			continue;
+
+		for (j = 0; j < group->num_pins; j++) {
+			if (group->pins[j] == selector) {
+				snprintf(buf, size, "%s (%x)",
+					 group->name, func);
+				return 0;
+			}
+		}
+	}
+
+	snprintf(buf, size, "Unknown (%x)", func);
+
+	return 0;
+}
+
 const struct pinconf_param meson_axg_pinconf_params[] = {
 	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
 	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
@@ -110,6 +155,9 @@ const struct pinctrl_ops meson_axg_pinctrl_ops = {
 	.pinconf_num_params = ARRAY_SIZE(meson_axg_pinconf_params),
 	.pinconf_set = meson_pinconf_set,
 	.pinconf_group_set = meson_pinconf_group_set,
+	.get_pin_name = meson_pinctrl_get_pin_name,
+	.get_pins_count = meson_pinctrl_get_pins_count,
+	.get_pin_muxing	= meson_axg_pinmux_get,
 };
 
 static int meson_axg_gpio_request(struct udevice *dev,