3.19.8-ckt19 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------ From: Wolfram Sang <[email protected]> commit 0129801be4b87226bf502f18f5a9eabd356d1058 upstream. If pinctrl_provide_dummies() is used unconditionally, then the dummy state will be used even on DT platforms when the "init" state was intentionally left out. Instead of "default", the dummy "init" state will then be used during probe. Thus, when probing an I2C controller on cold boot, communication triggered by bus notifiers broke because the pins were not initialized. Do it like OMAP2: use the dummy state only for non-DT platforms. Fixes: ef0eebc05130 ("drivers/pinctrl: Add the concept of an "init" state") Reported-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Sergei Shtylyov <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- drivers/pinctrl/sh-pfc/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c index 66dc62d..741e3ea 100644 --- a/drivers/pinctrl/sh-pfc/core.c +++ b/drivers/pinctrl/sh-pfc/core.c @@ -531,7 +531,9 @@ static int sh_pfc_probe(struct platform_device *pdev) return ret; } - pinctrl_provide_dummies(); + /* Enable dummy states for those platforms without pinctrl support */ + if (!of_have_populated_dt()) + pinctrl_provide_dummies(); ret = sh_pfc_init_ranges(pfc); if (ret < 0) -- 2.7.4
