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pinctrl: msm: Mux out gpio function with gpio_request()

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We rely on devices to use pinmuxing configurations in DT to select the
GPIO function (function 0) if they're going to use the gpio in GPIO
mode. Let's simplify things for driver authors by implementing
gpio_request_enable() for this pinctrl driver to mux out the GPIO
function when the gpio is use from gpiolib.

Cc: Doug Anderson <dianders@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Boyd 2018-08-16 13:06:47 -07:00 committed by Linus Walleij
parent 5b394b2ddf
commit 1de7ddb3a1
1 changed files with 16 additions and 0 deletions
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16
drivers/pinctrl/qcom/pinctrl-msm.c
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@ -176,11 +176,27 @@ static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev,
return 0;
}
static int msm_pinmux_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
const struct msm_pingroup *g = &pctrl->soc->groups[offset];
/* No funcs? Probably ACPI so can't do anything here */
if (!g->nfuncs)
return 0;
/* For now assume function 0 is GPIO because it always is */
return msm_pinmux_set_mux(pctldev, 0, offset);
}
static const struct pinmux_ops msm_pinmux_ops = {
.request = msm_pinmux_request,
.get_functions_count = msm_get_functions_count,
.get_function_name = msm_get_function_name,
.get_function_groups = msm_get_function_groups,
.gpio_request_enable = msm_pinmux_request_gpio,
.set_mux = msm_pinmux_set_mux,
};