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author | 2019-05-16 17:13:39 +0200 | |
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committer | 2019-05-24 13:49:32 +0200 | |
commit | b22a7f85443e579367dfc2d7f4cb6aa863c3a709 (patch) | |
tree | aa61635273dd93517d74a1b92ac12b644af1b03e /drivers/pinctrl/meson | |
parent | dt-bindings: pinctrl: meson: add output support in pinconf (diff) | |
download | linux-b22a7f85443e579367dfc2d7f4cb6aa863c3a709.tar.gz linux-b22a7f85443e579367dfc2d7f4cb6aa863c3a709.tar.bz2 linux-b22a7f85443e579367dfc2d7f4cb6aa863c3a709.zip |
pinctrl: meson: add output support in pinconf
Add pinconf support for PIN_CONFIG_OUTPUT_ENABLE and PIN_CONFIG_OUTPUT
in the meson pinctrl driver.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/meson')
-rw-r--r-- | drivers/pinctrl/meson/pinctrl-meson.c | 182 |
1 files changed, 127 insertions, 55 deletions
diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c index 33b4b141baac..410eb7559016 100644 --- a/drivers/pinctrl/meson/pinctrl-meson.c +++ b/drivers/pinctrl/meson/pinctrl-meson.c @@ -174,6 +174,88 @@ int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector, return 0; } +static int meson_pinconf_set_gpio_bit(struct meson_pinctrl *pc, + unsigned int pin, + unsigned int reg_type, + bool arg) +{ + struct meson_bank *bank; + unsigned int reg, bit; + int ret; + + ret = meson_get_bank(pc, pin, &bank); + if (ret) + return ret; + + meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit); + return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), + arg ? BIT(bit) : 0); +} + +static int meson_pinconf_get_gpio_bit(struct meson_pinctrl *pc, + unsigned int pin, + unsigned int reg_type) +{ + struct meson_bank *bank; + unsigned int reg, bit, val; + int ret; + + ret = meson_get_bank(pc, pin, &bank); + if (ret) + return ret; + + meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit); + ret = regmap_read(pc->reg_gpio, reg, &val); + if (ret) + return ret; + + return BIT(bit) & val ? 1 : 0; +} + +static int meson_pinconf_set_output(struct meson_pinctrl *pc, + unsigned int pin, + bool out) +{ + return meson_pinconf_set_gpio_bit(pc, pin, REG_DIR, !out); +} + +static int meson_pinconf_get_output(struct meson_pinctrl *pc, + unsigned int pin) +{ + int ret = meson_pinconf_get_gpio_bit(pc, pin, REG_DIR); + + if (ret < 0) + return ret; + + return !ret; +} + +static int meson_pinconf_set_drive(struct meson_pinctrl *pc, + unsigned int pin, + bool high) +{ + return meson_pinconf_set_gpio_bit(pc, pin, REG_OUT, high); +} + +static int meson_pinconf_get_drive(struct meson_pinctrl *pc, + unsigned int pin) +{ + return meson_pinconf_get_gpio_bit(pc, pin, REG_OUT); +} + +static int meson_pinconf_set_output_drive(struct meson_pinctrl *pc, + unsigned int pin, + bool high) +{ + int ret; + + ret = meson_pinconf_set_output(pc, pin, true); + if (ret) + return ret; + + return meson_pinconf_set_drive(pc, pin, high); +} + static int meson_pinconf_disable_bias(struct meson_pinctrl *pc, unsigned int pin) { @@ -267,39 +349,48 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin, { struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); enum pin_config_param param; - unsigned int drive_strength_ua; + unsigned int arg = 0; int i, ret; for (i = 0; i < num_configs; i++) { param = pinconf_to_config_param(configs[i]); switch (param) { + case PIN_CONFIG_DRIVE_STRENGTH_UA: + case PIN_CONFIG_OUTPUT_ENABLE: + case PIN_CONFIG_OUTPUT: + arg = pinconf_to_config_argument(configs[i]); + break; + + default: + break; + } + + switch (param) { case PIN_CONFIG_BIAS_DISABLE: ret = meson_pinconf_disable_bias(pc, pin); - if (ret) - return ret; break; case PIN_CONFIG_BIAS_PULL_UP: ret = meson_pinconf_enable_bias(pc, pin, true); - if (ret) - return ret; break; case PIN_CONFIG_BIAS_PULL_DOWN: ret = meson_pinconf_enable_bias(pc, pin, false); - if (ret) - return ret; break; case PIN_CONFIG_DRIVE_STRENGTH_UA: - drive_strength_ua = - pinconf_to_config_argument(configs[i]); - ret = meson_pinconf_set_drive_strength - (pc, pin, drive_strength_ua); - if (ret) - return ret; + ret = meson_pinconf_set_drive_strength(pc, pin, arg); + break; + case PIN_CONFIG_OUTPUT_ENABLE: + ret = meson_pinconf_set_output(pc, pin, arg); + break; + case PIN_CONFIG_OUTPUT: + ret = meson_pinconf_set_output_drive(pc, pin, arg); break; default: - return -ENOTSUPP; + ret = -ENOTSUPP; } + + if (ret) + return ret; } return 0; @@ -403,6 +494,24 @@ static int meson_pinconf_get(struct pinctrl_dev *pcdev, unsigned int pin, if (ret) return ret; break; + case PIN_CONFIG_OUTPUT_ENABLE: + ret = meson_pinconf_get_output(pc, pin); + if (ret <= 0) + return -EINVAL; + arg = 1; + break; + case PIN_CONFIG_OUTPUT: + ret = meson_pinconf_get_output(pc, pin); + if (ret <= 0) + return -EINVAL; + + ret = meson_pinconf_get_drive(pc, pin); + if (ret < 0) + return -EINVAL; + + arg = ret; + break; + default: return -ENOTSUPP; } @@ -447,56 +556,19 @@ static const struct pinconf_ops meson_pinconf_ops = { static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) { - struct meson_pinctrl *pc = gpiochip_get_data(chip); - unsigned int reg, bit; - struct meson_bank *bank; - int ret; - - ret = meson_get_bank(pc, gpio, &bank); - if (ret) - return ret; - - meson_calc_reg_and_bit(bank, gpio, REG_DIR, ®, &bit); - - return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), BIT(bit)); + return meson_pinconf_set_output(gpiochip_get_data(chip), gpio, false); } static int meson_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value) { - struct meson_pinctrl *pc = gpiochip_get_data(chip); - unsigned int reg, bit; - struct meson_bank *bank; - int ret; - - ret = meson_get_bank(pc, gpio, &bank); - if (ret) - return ret; - - meson_calc_reg_and_bit(bank, gpio, REG_DIR, ®, &bit); - ret = regmap_update_bits(pc->reg_gpio, reg, BIT(bit), 0); - if (ret) - return ret; - - meson_calc_reg_and_bit(bank, gpio, REG_OUT, ®, &bit); - return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), - value ? BIT(bit) : 0); + return meson_pinconf_set_output_drive(gpiochip_get_data(chip), + gpio, value); } static void meson_gpio_set(struct gpio_chip *chip, unsigned gpio, int value) { - struct meson_pinctrl *pc = gpiochip_get_data(chip); - unsigned int reg, bit; - struct meson_bank *bank; - int ret; - - ret = meson_get_bank(pc, gpio, &bank); - if (ret) - return; - - meson_calc_reg_and_bit(bank, gpio, REG_OUT, ®, &bit); - regmap_update_bits(pc->reg_gpio, reg, BIT(bit), - value ? BIT(bit) : 0); + meson_pinconf_set_drive(gpiochip_get_data(chip), gpio, value); } static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio) |