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| author |   Jerome Brunet <jbrunet@baylibre.com> | 2019-04-23 11:02:29 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2019-05-06 11:55:39 +0200 |
| commit | 98849da63fffdc010dca6e6f6785c2e2ff34e807 (patch) | |
| tree | b5c51dab07533936bb72f3a16e33d62e73ae8475 /drivers/mmc/host/meson-gx-mmc.c | |
| parent | mmc: omap_hsmmc: Use dev_get_drvdata() (diff) | |
| download | linux-dev-98849da63fffdc010dca6e6f6785c2e2ff34e807.tar.xz linux-dev-98849da63fffdc010dca6e6f6785c2e2ff34e807.zip | |
mmc: meson-gx: remove open coded read with timeout
There is already a function available to poll a register until a
condition is met. Let's use it instead of open coding it.
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 2eba507790e4..2deeacc051b1 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -23,6 +23,7 @@ #include <linux/init.h> #include <linux/delay.h> #include <linux/device.h> +#include <linux/iopoll.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/ioport.h> @@ -1100,7 +1101,6 @@ out: static int meson_mmc_wait_desc_stop(struct meson_host *host) { - int loop; u32 status; /* @@ -1110,20 +1110,10 @@ static int meson_mmc_wait_desc_stop(struct meson_host *host) * If we don't confirm the descriptor is stopped, it might raise new * IRQs after we have called mmc_request_done() which is bad. */ - for (loop = 50; loop; loop--) { - status = readl(host->regs + SD_EMMC_STATUS); - if (status & (STATUS_BUSY | STATUS_DESC_BUSY)) - udelay(100); - else - break; - } - if (status & (STATUS_BUSY | STATUS_DESC_BUSY)) { - dev_err(host->dev, "Timed out waiting for host to stop\n"); - return -ETIMEDOUT; - } - - return 0; + return readl_poll_timeout(host->regs + SD_EMMC_STATUS, status, + !(status & (STATUS_BUSY | STATUS_DESC_BUSY)), + 100, 5000); } static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id) |