diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2018-02-01 23:39:19 +0100 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2018-03-13 20:12:31 +0530 |
| commit | 8be4e61d01c5c66c888c600ef10cc4d7d465f7b1 (patch) | |
| tree | 1488e3ce7aaeb8dea6f6d909b2f47e660ff8e70d | |
| parent | 1bcfba537e7f59ce997094139a1f69a598e0c618 (diff) | |
mmc: sunxi: support cd-inverted
With CONFIG_DM_MMC the BananaPi does not detect SD cards.
The sunxi device trees use the cd-inverted property to indicate that
the card detect is inverted.
This property is documented in Linux kernel devicetree/bindings/mmc/mmc.txt
The property is not marked as deprecated.
A similar patch was posted by Tuomas but is in status "Changes Requested".
https://patchwork.ozlabs.org/patch/850377/
This patch is a stripped down version of his patch.
Suggested-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
| -rw-r--r-- | drivers/mmc/sunxi_mmc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c index 4edb4be46c..df6f32850e 100644 --- a/drivers/mmc/sunxi_mmc.c +++ b/drivers/mmc/sunxi_mmc.c @@ -30,6 +30,7 @@ struct sunxi_mmc_priv { uint32_t *mclkreg; unsigned fatal_err; struct gpio_desc cd_gpio; /* Change Detect GPIO */ + int cd_inverted; /* Inverted Card Detect */ struct sunxi_mmc *reg; struct mmc_config cfg; }; @@ -544,9 +545,11 @@ static int sunxi_mmc_getcd(struct udevice *dev) { struct sunxi_mmc_priv *priv = dev_get_priv(dev); - if (dm_gpio_is_valid(&priv->cd_gpio)) - return dm_gpio_get_value(&priv->cd_gpio); + if (dm_gpio_is_valid(&priv->cd_gpio)) { + int cd_state = dm_gpio_get_value(&priv->cd_gpio); + return cd_state ^ priv->cd_inverted; + } return 1; } @@ -610,6 +613,9 @@ static int sunxi_mmc_probe(struct udevice *dev) sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP); } + /* Check if card detect is inverted */ + priv->cd_inverted = dev_read_bool(dev, "cd-inverted"); + upriv->mmc = &plat->mmc; /* Reset controller */ |