From 239228947703c670c92e7204dcd875b87f45b716 Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Tue, 4 Jun 2019 11:04:53 +0200 Subject: [PATCH] pinctrl: meson-gx: 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 GX specific function to get the current function from registers. Signed-off-by: Neil Armstrong Tested-by: Maxime Jourdan --- drivers/pinctrl/meson/pinctrl-meson-gx-pmx.c | 44 ++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/pinctrl/meson/pinctrl-meson-gx-pmx.c b/drivers/pinctrl/meson/pinctrl-meson-gx-pmx.c index cf72576b6c..b37b517fe5 100644 --- a/drivers/pinctrl/meson/pinctrl-meson-gx-pmx.c +++ b/drivers/pinctrl/meson/pinctrl-meson-gx-pmx.c @@ -72,6 +72,47 @@ static int meson_gx_pinmux_group_set(struct udevice *dev, return 0; } +static int meson_gx_pinmux_get(struct udevice *dev, + unsigned int selector, + char *buf, int size) +{ + struct meson_pinctrl *priv = dev_get_priv(dev); + struct meson_pmx_group *group; + struct meson_gx_pmx_data *pmx_data; + void __iomem *addr; + int i, j, pos = 0; + unsigned int pin; + u32 reg; + + pin = selector + priv->data->pin_base; + + for (i = 0; i < priv->data->num_groups; i++) { + group = &priv->data->groups[i]; + pmx_data = (struct meson_gx_pmx_data *)group->data; + if (pmx_data->is_gpio) + continue; + + for (j = 0; j < group->num_pins; j++) { + if (group->pins[j] == pin) { + /* We have found a group using the pin */ + addr = priv->reg_mux + pmx_data->reg * 4; + reg = readl(addr) & BIT(pmx_data->bit); + if (reg) { + pos += snprintf(buf + pos, size - pos, + "%s ", group->name) - 1; + return 0; + } + } + } + } + + /* Fallback, must be used as GPIO */ + snprintf(buf, size, "%s or Unknown", + priv->data->groups[selector].name); + + return 0; +} + const struct pinconf_param meson_gx_pinconf_params[] = { { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 }, { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 }, @@ -89,6 +130,9 @@ const struct pinctrl_ops meson_gx_pinctrl_ops = { .pinconf_num_params = ARRAY_SIZE(meson_gx_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_gx_pinmux_get, }; static const struct dm_gpio_ops meson_gx_gpio_ops = { -- 2.30.2