This commit enhances the dw_mmc driver to support platform specific
hw_reset().
Reviewed-by: David Thompson <davthompson@xxxxxxxxxx>
Signed-off-by: Liming Sun <limings@xxxxxxxxxx>
---
drivers/mmc/host/dw_mmc.c | 6 ++++++
drivers/mmc/host/dw_mmc.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 8e2d676b9239..2d72da03fdfd 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1617,6 +1617,7 @@ static void dw_mci_hw_reset(struct mmc_host *mmc)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci *host = slot->host;
+ const struct dw_mci_drv_data *drv_data = host->drv_data;
int reset;
if (host->use_dma == TRANS_MODE_IDMAC)
@@ -1626,6 +1627,11 @@ static void dw_mci_hw_reset(struct mmc_host *mmc)
SDMMC_CTRL_FIFO_RESET))
return;
+ if (drv_data && drv_data->hw_reset) {
+ drv_data->hw_reset(host);
+ return;
+ }
+
/*
* According to eMMC spec, card reset procedure:
* tRstW >= 1us: RST_n pulse width
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 4ed81f94f7ca..1b86531a485c 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -565,6 +565,7 @@ struct dw_mci_slot {
* @execute_tuning: implementation specific tuning procedure.
* @set_data_timeout: implementation specific timeout.
* @get_drto_clks: implementation specific cycle count for data read timeout.
+ * @hw_reset: implementation specific HW reset.
*
* Provide controller implementation specific extensions. The usage of this
* data structure is fully optional and usage of each member in this structure
@@ -585,5 +586,6 @@ struct dw_mci_drv_data {
void (*set_data_timeout)(struct dw_mci *host,
unsigned int timeout_ns);
u32 (*get_drto_clks)(struct dw_mci *host);
+ void (*hw_reset)(struct dw_mci *host);
};
#endif /* _DW_MMC_H_ */
--
2.30.1
