diff options
| author | Prathamesh Shete <pshete@nvidia.com> | 2021-10-25 14:09:59 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2021-10-26 02:27:39 +0300 |
| commit | a42c7d95d29ec1d57511e87793ea1fa4ad41984d (patch) | |
| tree | 04df9a747cbf58016650e0043b21367f3c03c7cc /drivers/pinctrl/tegra/pinctrl-tegra.c | |
| parent | c7892ae13e461ed20154321eb792e07ebe38f5b3 (diff) | |
| download | linux-a42c7d95d29ec1d57511e87793ea1fa4ad41984d.tar.xz | |
pinctrl: tegra: Use correct offset for pin group
Function tegra_pinctrl_gpio_request_enable() and
tegra_pinctrl_gpio_disable_free() uses pin offset instead
of group offset, causing the driver to use wrong offset
to enable gpio.
Add a helper function tegra_pinctrl_get_group() to parse the
pin group and determine correct offset.
Signed-off-by: Kartik K <kkartik@nvidia.com>
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Link: https://lore.kernel.org/r/20211025110959.27751-1-pshete@nvidia.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/tegra/pinctrl-tegra.c')
| -rw-r--r-- | drivers/pinctrl/tegra/pinctrl-tegra.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c index 195cfe557511..0471d9c7f0ba 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c @@ -275,6 +275,29 @@ static int tegra_pinctrl_set_mux(struct pinctrl_dev *pctldev, return 0; } +static struct tegra_pingroup *tegra_pinctrl_get_group(struct pinctrl_dev *pctldev, + unsigned int offset) +{ + struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); + struct tegra_pingroup *g; + unsigned int group, num_pins, j; + const unsigned int *pins; + int ret; + + for (group = 0; group < pmx->soc->ngroups; ++group) { + ret = tegra_pinctrl_get_group_pins(pctldev, group, &pins, &num_pins); + if (ret < 0) + continue; + for (j = 0; j < num_pins; j++) { + if (offset == pins[j]) + return &pmx->soc->groups[group]; + } + } + + dev_err(pctldev->dev, "Pingroup not found for pin %u\n", offset); + return NULL; +} + static int tegra_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int offset) @@ -286,7 +309,10 @@ static int tegra_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev, if (!pmx->soc->sfsel_in_mux) return 0; - group = &pmx->soc->groups[offset]; + group = tegra_pinctrl_get_group(pctldev, offset); + + if (!group) + return -EINVAL; if (group->mux_reg < 0 || group->sfsel_bit < 0) return -EINVAL; @@ -309,7 +335,10 @@ static void tegra_pinctrl_gpio_disable_free(struct pinctrl_dev *pctldev, if (!pmx->soc->sfsel_in_mux) return; - group = &pmx->soc->groups[offset]; + group = tegra_pinctrl_get_group(pctldev, offset); + + if (!group) + return -EINVAL; if (group->mux_reg < 0 || group->sfsel_bit < 0) return; |