diff options
| author | Jerome Brunet <jbrunet@baylibre.com> | 2017-08-28 16:29:11 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-08-30 15:03:50 +0200 |
| commit | 186cd8b7f586250cc0bb20b1c2c2586895dede7e (patch) | |
| tree | e172eff6f030f0dbe6916b665a4977af810eadd4 /drivers/mmc | |
| parent | 74858655cbff055a4e716634f0d656b8f1ff7a9f (diff) | |
| download | linux-186cd8b7f586250cc0bb20b1c2c2586895dede7e.tar.bz2 | |
mmc: meson-gx: implement card_busy callback
Implement the card_busy callback to be able to verify that the
card is done dealing with voltage switch, when the support is
added later on.
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 3914c3a82cc4..40fa7ae64c72 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -76,6 +76,7 @@ #define SD_EMMC_STATUS 0x48 #define STATUS_BUSY BIT(31) +#define STATUS_DATI GENMASK(23, 16) #define SD_EMMC_IRQ_EN 0x4c #define IRQ_RXD_ERR_MASK GENMASK(7, 0) @@ -902,6 +903,17 @@ static void meson_mmc_cfg_init(struct meson_host *host) writel(cfg, host->regs + SD_EMMC_CFG); } +static int meson_mmc_card_busy(struct mmc_host *mmc) +{ + struct meson_host *host = mmc_priv(mmc); + u32 regval; + + regval = readl(host->regs + SD_EMMC_STATUS); + + /* We are only interrested in lines 0 to 3, so mask the other ones */ + return !(FIELD_GET(STATUS_DATI, regval) & 0xf); +} + static const struct mmc_host_ops meson_mmc_ops = { .request = meson_mmc_request, .set_ios = meson_mmc_set_ios, @@ -909,6 +921,7 @@ static const struct mmc_host_ops meson_mmc_ops = { .pre_req = meson_mmc_pre_req, .post_req = meson_mmc_post_req, .execute_tuning = meson_mmc_execute_tuning, + .card_busy = meson_mmc_card_busy, }; static int meson_mmc_probe(struct platform_device *pdev) |