diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-05-31 17:05:17 +0900 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-05-31 12:49:48 +0200 |
| commit | aa543888ca8c033a7f06499b93cdfec84ad6ab27 (patch) | |
| tree | f3ba535e18c45be3a5b0b6d4edf44a36273138f4 /drivers/pinctrl/uniphier | |
| parent | c2ebf4754b92f9fb1e422c8c068da7f0b12c9432 (diff) | |
| download | linux-aa543888ca8c033a7f06499b93cdfec84ad6ab27.tar.bz2 | |
pinctrl: uniphier: support per-pin input enable for new SoCs
Upcoming new pinctrl drivers for PH1-LD11 and PH-LD20 support input
signal gating for each pin. (While, existing ones only support it
per pin-group.) This commit updates the core part for that.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/uniphier')
| -rw-r--r-- | drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 24 | ||||
| -rw-r--r-- | drivers/pinctrl/uniphier/pinctrl-uniphier.h | 1 |
2 files changed, 14 insertions, 11 deletions
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c index ca2562ac1180..d774a8e9c6a1 100644 --- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c @@ -433,22 +433,24 @@ static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev, { struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev); unsigned int iectrl = uniphier_pin_get_iectrl(desc->drv_data); + unsigned int reg, mask; - if (enable == 0) { - /* - * Multiple pins share one input enable, so per-pin disabling - * is impossible. - */ - dev_err(pctldev->dev, "unable to disable input\n"); + /* + * Multiple pins share one input enable, per-pin disabling is + * impossible. + */ + if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL) && + !enable) return -EINVAL; - } + /* UNIPHIER_PIN_IECTRL_NONE means the pin is always input-enabled */ if (iectrl == UNIPHIER_PIN_IECTRL_NONE) - /* This pin is always input-enabled. nothing to do. */ - return 0; + return enable ? 0 : -EINVAL; + + reg = UNIPHIER_PINCTRL_IECTRL + iectrl / 32 * 4; + mask = BIT(iectrl % 32); - return regmap_update_bits(priv->regmap, UNIPHIER_PINCTRL_IECTRL, - BIT(iectrl), BIT(iectrl)); + return regmap_update_bits(priv->regmap, reg, mask, enable ? mask : 0); } static int uniphier_conf_pin_config_set(struct pinctrl_dev *pctldev, diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h index 3fd50206c310..9941a4ceb5c5 100644 --- a/drivers/pinctrl/uniphier/pinctrl-uniphier.h +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h @@ -166,6 +166,7 @@ struct uniphier_pinctrl_socdata { const struct uniphier_pinmux_function *functions; int functions_count; unsigned int caps; +#define UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL BIT(1) #define UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE BIT(0) }; |