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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>
This commit is contained in:
Jerome Brunet 2019-05-16 17:13:39 +02:00 committed by Linus Walleij
parent 1254db248f
commit b22a7f8544
1 changed files with 127 additions and 55 deletions
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182
drivers/pinctrl/meson/pinctrl-meson.c
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@ -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, &reg, &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, &reg, &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, &reg, &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, &reg, &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, &reg, &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, &reg, &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)