diff options
| author | Sowjanya Komatineni <skomatineni@nvidia.com> | 2019-08-16 22:41:47 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-08-21 10:00:16 +0300 |
| commit | a4873accca0529b6a32e1ceb458be843cdea9ec6 (patch) | |
| tree | 2f38cc64e08ba10242d471221f6c08ba1545c8b0 /drivers/pinctrl/tegra | |
| parent | c2cf351eba2ff6002ce8eb178452219d2521e38e (diff) | |
| download | linux-a4873accca0529b6a32e1ceb458be843cdea9ec6.tar.xz | |
pinctrl: tegra: Flush pinctrl writes during resume
This patch adds pinctrl register read to flush all the prior pinctrl
writes and then adds barrier for pinctrl register read to complete
during resume to make sure all pinctrl changes are effective.
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1565984527-5272-3-git-send-email-skomatineni@nvidia.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/tegra')
| -rw-r--r-- | drivers/pinctrl/tegra/pinctrl-tegra.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c index 5e3c00137d71..e9a7cbb9aa33 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c @@ -677,6 +677,10 @@ static int tegra_pinctrl_resume(struct device *dev) writel_relaxed(*backup_regs++, regs++); } + /* flush all the prior writes */ + readl_relaxed(pmx->regs[0]); + /* wait for pinctrl register read to complete */ + rmb(); return 0; } |