lkml.org 
[lkml]   [2020]   [Mar]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] pinctrl: sprd: Add pin high impedance mode support
Date
From: Linhua Xu <linhua.xu@unisoc.com>

For Spreadtrum pin controller, it will be the high impedance
mode if disable input and output mode for a pin. Thus add
PIN_CONFIG_BIAS_HIGH_IMPEDANCE configuration to support it.

Signed-off-by: Linhua Xu <linhua.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
---
drivers/pinctrl/sprd/pinctrl-sprd.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
index 8e39610..48cbf2a 100644
--- a/drivers/pinctrl/sprd/pinctrl-sprd.c
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -467,6 +467,12 @@ static int sprd_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin_id,
case PIN_CONFIG_OUTPUT_ENABLE:
arg = reg & SLEEP_OUTPUT_MASK;
break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ if ((reg & SLEEP_OUTPUT) || (reg & SLEEP_INPUT))
+ return -EINVAL;
+
+ arg = 1;
+ break;
case PIN_CONFIG_DRIVE_STRENGTH:
arg = (reg >> DRIVE_STRENGTH_SHIFT) &
DRIVE_STRENGTH_MASK;
@@ -646,6 +652,12 @@ static int sprd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin_id,
shift = SLEEP_OUTPUT_SHIFT;
}
break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ if (is_sleep_config == true) {
+ val = shift = 0;
+ mask = SLEEP_OUTPUT | SLEEP_INPUT;
+ }
+ break;
case PIN_CONFIG_DRIVE_STRENGTH:
if (arg < 2 || arg > 60)
return -EINVAL;
--
1.9.1
\
 
 \ /
  Last update: 2020-03-25 09:27    [W:0.046 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site