iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pinctrl: mediatek: Supporting driving setting without mapping current to register value

Browse Source 
[ Upstream commit 5f755e1f1efe5ca3b475b14169e6e85bf1411bb5 ]

MediaTek's smartphone project actual usage does need to know current value
(in mA) in procedure of finding the best driving setting.
The steps in the procedure is like as follow:

1. set driving setting field in setting register as 0, measure waveform,
   perform test, and etc.
2. set driving setting field in setting register as 1, measure waveform,
   perform test, and etc.
...
n. set driving setting field in setting register as n-1, measure
   waveform, perform test, and etc.
Check the results of steps 1~n and adopt the setting that get best result.

This procedure does need to know the mapping between current to register
value.
Therefore, setting driving without mapping current is more practical for
MediaTek's smartphone usage.

Signed-off-by: Light Hsieh <light.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1579675994-7001-2-git-send-email-light.hsieh@mediatek.com
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Stable-dep-of: c5d3b64c568a ("pinctrl: mediatek: paris: Rework support for PIN_CONFIG_{INPUT,OUTPUT}_ENABLE")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Light Hsieh 2020-01-22 14:53:10 +08:00 committed by Greg Kroah-Hartman
parent 61754e3351
commit 3d7b213d92
3 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/pinctrl/mediatek/pinctrl-mt6765.c
View File

@ -1077,8 +1077,8 @@ static const struct mtk_pin_soc mt6765_data = {
.bias_disable_get = mtk_pinconf_bias_disable_get,
.bias_set = mtk_pinconf_bias_set,
.bias_get = mtk_pinconf_bias_get,
.drive_set = mtk_pinconf_drive_set_rev1,
.drive_get = mtk_pinconf_drive_get_rev1,
.drive_set = mtk_pinconf_drive_set_raw,
.drive_get = mtk_pinconf_drive_get_raw,
.adv_pull_get = mtk_pinconf_adv_pull_get,
.adv_pull_set = mtk_pinconf_adv_pull_set,
};

12
drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
View File

@ -612,6 +612,18 @@ int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
return 0;
}
int mtk_pinconf_drive_set_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV, arg);
}
int mtk_pinconf_drive_get_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val)
{
return mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV, val);
}
int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
u32 arg)

5
drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
View File

@ -288,6 +288,11 @@ int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val);
int mtk_pinconf_drive_set_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg);
int mtk_pinconf_drive_get_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val);
int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
u32 arg);