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pinctrl: msm: add support to configure ipq40xx GPIO_PULL bits 

GPIO_PULL bits configurations in TLMM_GPIO_CFG register
differs for IPQ40xx from rest of the other qcom SoCs.
As it does not support the keeper state and therefore can't
support bias-bus-hold property.

This patch adds a pull_no_keeper setting which configures the
msm_gpio_pull bits for ipq40xx. This is required to fix the
proper configurations of gpio-pull bits for nand pins mux.

IPQ40xx SoC:
2'b10: Internal pull up enable.
2'b11: Unsupport

For other SoC's:
2'b10: Keeper
2'b11: Pull-Up

Note: Due to pull_no_keeper length, all kerneldoc entries
in the msm_pinctrl_soc_data struct had to be realigned.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Ram Chandra Jangir <rjangir@codeaurora.org>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Ram Chandra Jangir 2017-07-14 16:14:11 +02:00 committed by Linus Walleij
parent 77a6595910
commit 83cf5faeba
3 changed files with 29 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/pinctrl/qcom/pinctrl-ipq4019.c
View File

@ -706,6 +706,7 @@ static const struct msm_pinctrl_soc_data ipq4019_pinctrl = {
.groups = ipq4019_groups,
.ngroups = ARRAY_SIZE(ipq4019_groups),
.ngpios = 100,
.pull_no_keeper = true,
};
static int ipq4019_pinctrl_probe(struct platform_device *pdev)

25
drivers/pinctrl/qcom/pinctrl-msm.c
View File

@ -202,10 +202,11 @@ static int msm_config_reg(struct msm_pinctrl *pctrl,
return 0;
}
#define MSM_NO_PULL 0
#define MSM_PULL_DOWN 1
#define MSM_KEEPER 2
#define MSM_PULL_UP 3
#define MSM_NO_PULL 0
#define MSM_PULL_DOWN 1
#define MSM_KEEPER 2
#define MSM_PULL_UP_NO_KEEPER 2
#define MSM_PULL_UP 3
static unsigned msm_regval_to_drive(u32 val)
{
@ -243,10 +244,16 @@ static int msm_config_group_get(struct pinctrl_dev *pctldev,
arg = arg == MSM_PULL_DOWN;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
if (pctrl->soc->pull_no_keeper)
return -ENOTSUPP;
arg = arg == MSM_KEEPER;
break;
case PIN_CONFIG_BIAS_PULL_UP:
arg = arg == MSM_PULL_UP;
if (pctrl->soc->pull_no_keeper)
arg = arg == MSM_PULL_UP_NO_KEEPER;
else
arg = arg == MSM_PULL_UP;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
arg = msm_regval_to_drive(arg);
@ -309,10 +316,16 @@ static int msm_config_group_set(struct pinctrl_dev *pctldev,
arg = MSM_PULL_DOWN;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
if (pctrl->soc->pull_no_keeper)
return -ENOTSUPP;
arg = MSM_KEEPER;
break;
case PIN_CONFIG_BIAS_PULL_UP:
arg = MSM_PULL_UP;
if (pctrl->soc->pull_no_keeper)
arg = MSM_PULL_UP_NO_KEEPER;
else
arg = MSM_PULL_UP;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
/* Check for invalid values */

16
drivers/pinctrl/qcom/pinctrl-msm.h
View File

@ -99,13 +99,14 @@ struct msm_pingroup {
/**
* struct msm_pinctrl_soc_data - Qualcomm pin controller driver configuration
* @pins: An array describing all pins the pin controller affects.
* @npins: The number of entries in @pins.
* @functions: An array describing all mux functions the SoC supports.
* @nfunctions: The number of entries in @functions.
* @groups: An array describing all pin groups the pin SoC supports.
* @ngroups: The numbmer of entries in @groups.
* @ngpio: The number of pingroups the driver should expose as GPIOs.
* @pins: An array describing all pins the pin controller affects.
* @npins: The number of entries in @pins.
* @functions: An array describing all mux functions the SoC supports.
* @nfunctions: The number of entries in @functions.
* @groups: An array describing all pin groups the pin SoC supports.
* @ngroups: The numbmer of entries in @groups.
* @ngpio: The number of pingroups the driver should expose as GPIOs.
* @pull_no_keeper: The SoC does not support keeper bias.
*/
struct msm_pinctrl_soc_data {
const struct pinctrl_pin_desc *pins;
@ -115,6 +116,7 @@ struct msm_pinctrl_soc_data {
const struct msm_pingroup *groups;
unsigned ngroups;
unsigned ngpios;
bool pull_no_keeper;
};
int msm_pinctrl_probe(struct platform_device *pdev,