diff options
| author | Chen-Yu Tsai <wens@csie.org> | 2015-03-03 09:44:40 +0800 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-05-17 19:11:53 -0400 |
| commit | 7c06756c1d6a373c9dec8123ac34854d0547e468 (patch) | |
| tree | 60fd8eabd9ab260468851c8782b453d739ce41b3 | |
| parent | cdc0cf5f1f6a30d20c2d543f569b8dbefff518e8 (diff) | |
mmc: sunxi: Use devm_reset_control_get_optional() for reset control
[ Upstream commit 9e71c589e44ddf2b86f361c81e360c6b0d0354b1 ]
The reset control for the sunxi mmc controller is optional. Some
newer platforms (sun6i, sun8i, sun9i) have it, while older ones
(sun4i, sun5i, sun7i) don't.
Use the properly stubbed _optional version so the driver does not
fail to compile when RESET_CONTROLLER=n.
This patch also adds a check for deferred probing on the reset
control.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Cc: <stable@vger.kernel.org> # 3.16+
Acked-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/mmc/host/sunxi-mmc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index d1663b3c4143..aac659bdd08a 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -909,7 +909,9 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, return PTR_ERR(host->clk_mmc); } - host->reset = devm_reset_control_get(&pdev->dev, "ahb"); + host->reset = devm_reset_control_get_optional(&pdev->dev, "ahb"); + if (PTR_ERR(host->reset) == -EPROBE_DEFER) + return PTR_ERR(host->reset); ret = clk_prepare_enable(host->clk_ahb); if (ret) { |