diff options
Diffstat (limited to 'drivers/pinctrl/uniphier/pinctrl-uniphier-core.c')
| -rw-r--r-- | drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 134 |
1 files changed, 125 insertions, 9 deletions
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c index 51144b8e73..d8e9948ee7 100644 --- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c @@ -5,6 +5,7 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include <common.h> #include <linux/io.h> #include <linux/err.h> #include <linux/sizes.h> @@ -15,6 +16,7 @@ #define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000 #define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700 +#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00 #define UNIPHIER_PINCTRL_IECTRL 0x1d00 static const char *uniphier_pinctrl_dummy_name = "_dummy"; @@ -55,8 +57,8 @@ static const char *uniphier_pinmux_get_function_name(struct udevice *dev, return priv->socdata->functions[selector]; } -static void uniphier_pinconf_input_enable_perpin(struct udevice *dev, - unsigned pin) +static int uniphier_pinconf_input_enable_perpin(struct udevice *dev, + unsigned int pin, int enable) { struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); unsigned reg; @@ -66,18 +68,30 @@ static void uniphier_pinconf_input_enable_perpin(struct udevice *dev, mask = BIT(pin % 32); tmp = readl(priv->base + reg); - tmp |= mask; + if (enable) + tmp |= mask; + else + tmp &= ~mask; writel(tmp, priv->base + reg); + + return 0; } -static void uniphier_pinconf_input_enable_legacy(struct udevice *dev, - unsigned pin) +static int uniphier_pinconf_input_enable_legacy(struct udevice *dev, + unsigned int pin, int enable) { struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); int pins_count = priv->socdata->pins_count; const struct uniphier_pinctrl_pin *pins = priv->socdata->pins; int i; + /* + * Multiple pins share one input enable, per-pin disabling is + * impossible. + */ + if (!enable) + return -EINVAL; + for (i = 0; i < pins_count; i++) { if (pins[i].number == pin) { unsigned int iectrl; @@ -89,18 +103,115 @@ static void uniphier_pinconf_input_enable_legacy(struct udevice *dev, writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL); } } + + return 0; } -static void uniphier_pinconf_input_enable(struct udevice *dev, unsigned pin) +static int uniphier_pinconf_input_enable(struct udevice *dev, + unsigned int pin, int enable) { struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) - uniphier_pinconf_input_enable_perpin(dev, pin); + return uniphier_pinconf_input_enable_perpin(dev, pin, enable); + else + return uniphier_pinconf_input_enable_legacy(dev, pin, enable); +} + +#if CONFIG_IS_ENABLED(PINCONF) + +static const struct pinconf_param uniphier_pinconf_params[] = { + { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 }, + { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 }, + { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 }, + { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 }, + { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 }, + { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 }, +}; + +static int uniphier_pinconf_bias_set(struct udevice *dev, unsigned int pin, + unsigned int param, unsigned int arg) +{ + struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); + unsigned int enable = 1; + unsigned int reg; + u32 mask, tmp; + + if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PUPD_SIMPLE)) + return -ENOTSUPP; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + enable = 0; + break; + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + if (arg == 0) /* total bias is not supported */ + return -EINVAL; + break; + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + if (arg == 0) /* configuration ignored */ + return 0; + default: + BUG(); + } + + reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pin / 32 * 4; + mask = BIT(pin % 32); + + tmp = readl(priv->base + reg); + if (enable) + tmp |= mask; else - uniphier_pinconf_input_enable_legacy(dev, pin); + tmp &= ~mask; + writel(tmp, priv->base + reg); + + return 0; +} + +static int uniphier_pinconf_set_one(struct udevice *dev, unsigned int pin, + unsigned int param, unsigned int arg) +{ + int ret; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + ret = uniphier_pinconf_bias_set(dev, pin, param, arg); + break; + case PIN_CONFIG_INPUT_ENABLE: + ret = uniphier_pinconf_input_enable(dev, pin, arg); + break; + default: + printf("unsupported configuration parameter %u\n", param); + return -EINVAL; + } + + return ret; } +static int uniphier_pinconf_group_set(struct udevice *dev, + unsigned int group_selector, + unsigned int param, unsigned int arg) +{ + struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); + const struct uniphier_pinctrl_group *grp = + &priv->socdata->groups[group_selector]; + int i, ret; + + for (i = 0; i < grp->num_pins; i++) { + ret = uniphier_pinconf_set_one(dev, grp->pins[i], param, arg); + if (ret) + return ret; + } + + return 0; +} + +#endif /* CONFIG_IS_ENABLED(PINCONF) */ + static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin, int muxval) { @@ -112,7 +223,7 @@ static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin, u32 tmp; /* some pins need input-enabling */ - uniphier_pinconf_input_enable(dev, pin); + uniphier_pinconf_input_enable(dev, pin, 1); if (muxval < 0) return; /* dedicated pin; nothing to do for pin-mux */ @@ -174,6 +285,11 @@ const struct pinctrl_ops uniphier_pinctrl_ops = { .get_functions_count = uniphier_pinmux_get_functions_count, .get_function_name = uniphier_pinmux_get_function_name, .pinmux_group_set = uniphier_pinmux_group_set, +#if CONFIG_IS_ENABLED(PINCONF) + .pinconf_num_params = ARRAY_SIZE(uniphier_pinconf_params), + .pinconf_params = uniphier_pinconf_params, + .pinconf_group_set = uniphier_pinconf_group_set, +#endif .set_state = pinctrl_generic_set_state, }; |