diff options
| author | Ludovic Barre <ludovic.barre@st.com> | 2018-10-08 14:08:51 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-10-09 09:13:04 +0200 |
| commit | 15878e58461bbb4def541b72b835be410e1a9cf4 (patch) | |
| tree | 0e442088ebdb9f53099616e8fc307ce7552f668e | |
| parent | dt-bindings: mmci: add optional reset property (diff) | |
| download | linux-15878e58461bbb4def541b72b835be410e1a9cf4.tar.xz linux-15878e58461bbb4def541b72b835be410e1a9cf4.zip | |
mmc: mmci: add optional reset property
This patch adds a optional reset management.
STM32 sdmmc variant needs to reset hardware block
during the power cycle procedure (for re-initialization).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/mmci.c | 7 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.h | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 760759919f7f..d636a0e6aa9f 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -36,6 +36,7 @@ #include <linux/pm_runtime.h> #include <linux/types.h> #include <linux/pinctrl/consumer.h> +#include <linux/reset.h> #include <asm/div64.h> #include <asm/io.h> @@ -1882,6 +1883,12 @@ static int mmci_probe(struct amba_device *dev, dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max); + host->rst = devm_reset_control_get_optional_exclusive(&dev->dev, NULL); + if (IS_ERR(host->rst)) { + ret = PTR_ERR(host->rst); + goto clk_disable; + } + /* Get regulators and the supported OCR mask */ ret = mmc_regulator_get_supply(mmc); if (ret) diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index cdcadd29a10d..8ecb1eee001e 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -318,6 +318,8 @@ struct mmci_host { struct clk *clk; u8 singleirq:1; + struct reset_control *rst; + spinlock_t lock; unsigned int mclk; |