Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Stephen Boyd <swboyd@chromium.org>
To:     Linus Walleij <linus.walleij@linaro.org>
Cc:     linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-gpio@vger.kernel.org, Doug Anderson <dianders@chromium.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Niklas Cassel <niklas.cassel@linaro.org>
Subject: [PATCH] pinctrl: msm: Actually use function 0 for gpio selection
Date:   Mon,  1 Oct 2018 14:49:05 -0700
Message-Id: <20181001214905.12149-1-swboyd@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This code needs to select function #0, which is the first int in the
array of functions, not the number 0 which may or may not be the
function for "GPIO mode" per the enum mapping. We were getting lucky on
SDM845, where this was tested, because the function 0 matched the enum
value for "GPIO mode". On other platforms, e.g. MSM8996, the gpio enum
value is the last one in the list so this code doesn't work and we see a
warning at boot. Fix it by grabbing the first element out of the array
of functions.

Cc: Doug Anderson <dianders@chromium.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Niklas Cassel <niklas.cassel@linaro.org>
Reported-by: Niklas Cassel <niklas.cassel@linaro.org>
Fixes: 1de7ddb3a15c ("pinctrl: msm: Mux out gpio function with gpio_request()")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 1684b2da09d5..b925b8feac95 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -188,7 +188,7 @@ static int msm_pinmux_request_gpio(struct pinctrl_dev *pctldev,
 		return 0;
 
 	/* For now assume function 0 is GPIO because it always is */
-	return msm_pinmux_set_mux(pctldev, 0, offset);
+	return msm_pinmux_set_mux(pctldev, g->funcs[0], offset);
 }
 
 static const struct pinmux_ops msm_pinmux_ops = {
-- 
Sent by a computer through tubes