diff options
| author |   Sean Wang <sean.wang@mediatek.com> | 2018-09-08 19:07:23 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2018-09-18 14:52:52 -0700 |
| commit | 3ad38a14e13c10f19d4a6ca9ed3d90b003e21a45 (patch) | |
| tree | 540b54cdaa9c8f666bfcb956c0c0dddfa8144f45 /drivers/pinctrl/mediatek | |
| parent | pinctrl: mediatek: add driving strength related support to pinctrl-mtk-common-v2.c (diff) | |
| download | linux-dev-3ad38a14e13c10f19d4a6ca9ed3d90b003e21a45.tar.xz linux-dev-3ad38a14e13c10f19d4a6ca9ed3d90b003e21a45.zip | |
pinctrl: mediatek: add drv register support to pinctrl-mtk-common-v2.c
Certain SoCs have to program DRV register to configure driving
strength so that we add it in the existing path as an option.
Signed-off-by: Ryder.Lee <ryder.lee@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 38 | ||||
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h | 5 |
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c index 886b40ec3b3f..3f0917967f2a 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c @@ -242,3 +242,41 @@ int mtk_pinconf_drive_get(struct mtk_pinctrl *hw, return 0; } + +/* Revision 1 */ +int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw, + const struct mtk_pin_desc *desc, u32 arg) +{ + const struct mtk_drive_desc *tb; + int err = -ENOTSUPP; + + tb = &mtk_drive[desc->drv_n]; + + if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) { + arg = (arg / tb->step - 1) * tb->scal; + + err = mtk_hw_set_value(hw, desc->number, PINCTRL_PIN_REG_DRV, + arg); + if (err) + return err; + } + + return err; +} + +int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw, + const struct mtk_pin_desc *desc, int *val) +{ + const struct mtk_drive_desc *tb; + int err, val1; + + tb = &mtk_drive[desc->drv_n]; + + err = mtk_hw_get_value(hw, desc->number, PINCTRL_PIN_REG_DRV, &val1); + if (err) + return err; + + *val = ((val1 & 0x7) / tb->scal + 1) * tb->step; + + return 0; +} diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h index 727e5aaca52f..cbc9a720d516 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h @@ -175,4 +175,9 @@ int mtk_pinconf_drive_set(struct mtk_pinctrl *hw, int mtk_pinconf_drive_get(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc, int *val); +int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw, + const struct mtk_pin_desc *desc, u32 arg); +int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw, + const struct mtk_pin_desc *desc, int *val); + #endif /* __PINCTRL_MTK_COMMON_V2_H */ |