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pinctrl: meson: Rework enable/disable bias part 

rework bias enable/disable part to prepare drive-strength integration
no functional changes

Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Guillaume La Roque 2019-05-14 10:26:50 +02:00 committed by Linus Walleij
parent 013786c043
commit 9959d9a747
1 changed files with 49 additions and 36 deletions
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85
drivers/pinctrl/meson/pinctrl-meson.c
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@ -174,62 +174,75 @@ int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector,
return 0;
}
static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
unsigned long *configs, unsigned num_configs)
static int meson_pinconf_disable_bias(struct meson_pinctrl *pc,
unsigned int pin)
{
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
struct meson_bank *bank;
enum pin_config_param param;
unsigned int reg, bit;
int i, ret;
unsigned int reg, bit = 0;
int ret;
ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg, &bit);
ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), 0);
if (ret)
return ret;
return 0;
}
static int meson_pinconf_enable_bias(struct meson_pinctrl *pc, unsigned int pin,
bool pull_up)
{
struct meson_bank *bank;
unsigned int reg, bit, val = 0;
int ret;
ret = meson_get_bank(pc, pin, &bank);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
if (pull_up)
val = BIT(bit);
ret = regmap_update_bits(pc->reg_pull, reg, BIT(bit), val);
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg, &bit);
ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), BIT(bit));
if (ret)
return ret;
return 0;
}
static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
unsigned long *configs, unsigned num_configs)
{
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
enum pin_config_param param;
int i, ret;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg,
&bit);
ret = regmap_update_bits(pc->reg_pullen, reg,
BIT(bit), 0);
ret = meson_pinconf_disable_bias(pc, pin);
if (ret)
return ret;
break;
case PIN_CONFIG_BIAS_PULL_UP:
dev_dbg(pc->dev, "pin %u: enable pull-up\n", pin);
meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
&reg, &bit);
ret = regmap_update_bits(pc->reg_pullen, reg,
BIT(bit), BIT(bit));
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
ret = regmap_update_bits(pc->reg_pull, reg,
BIT(bit), BIT(bit));
ret = meson_pinconf_enable_bias(pc, pin, true);
if (ret)
return ret;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
dev_dbg(pc->dev, "pin %u: enable pull-down\n", pin);
meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
&reg, &bit);
ret = regmap_update_bits(pc->reg_pullen, reg,
BIT(bit), BIT(bit));
if (ret)
return ret;
meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
ret = regmap_update_bits(pc->reg_pull, reg,
BIT(bit), 0);
ret = meson_pinconf_enable_bias(pc, pin, false);
if (ret)
return ret;
break;