[PATCH v4 2/4] pinctrl: qcom: Allow SoCs to specify a GPIO function that's not 0

[Douglas Anderson]

There's currently a comment in the code saying function 0 is GPIO.
Instead of hardcoding it, let's add a member where an SoC can specify
it.  No known SoCs use a number other than 0, but this just makes the
code clearer.  NOTE: no SoC code needs to be updated since we can rely
on zero-initialization.

Signed-off-by: Douglas Anderson <diand...@chromium.org>
Reviewed-by: Stephen Boyd <swb...@chromium.org>
---

(no changes since v1)

 drivers/pinctrl/qcom/pinctrl-msm.c | 4 ++--
 drivers/pinctrl/qcom/pinctrl-msm.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c 
b/drivers/pinctrl/qcom/pinctrl-msm.c
index 77a25bdf0da7..588df91274e2 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -210,8 +210,8 @@ static int msm_pinmux_request_gpio(struct pinctrl_dev 
*pctldev,
        if (!g->nfuncs)
                return 0;
 
-       /* For now assume function 0 is GPIO because it always is */
-       return msm_pinmux_set_mux(pctldev, g->funcs[0], offset);
+       return msm_pinmux_set_mux(pctldev,
+                                 g->funcs[pctrl->soc->gpio_func], offset);
 }
 
 static const struct pinmux_ops msm_pinmux_ops = {
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h 
b/drivers/pinctrl/qcom/pinctrl-msm.h
index 333f99243c43..e31a5167c91e 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.h
+++ b/drivers/pinctrl/qcom/pinctrl-msm.h
@@ -118,6 +118,7 @@ struct msm_gpio_wakeirq_map {
  * @wakeirq_dual_edge_errata: If true then GPIOs using the wakeirq_map need
  *                            to be aware that their parent can't handle dual
  *                            edge interrupts.
+ * @gpio_func: Which function number is GPIO (usually 0).
  */
 struct msm_pinctrl_soc_data {
        const struct pinctrl_pin_desc *pins;
@@ -134,6 +135,7 @@ struct msm_pinctrl_soc_data {
        const struct msm_gpio_wakeirq_map *wakeirq_map;
        unsigned int nwakeirq_map;
        bool wakeirq_dual_edge_errata;
+       unsigned int gpio_func;
 };
 
 extern const struct dev_pm_ops msm_pinctrl_dev_pm_ops;
-- 
2.29.2.576.ga3fc446d84-goog