From d6ad5a0af9e6a12f47008141259f77b568c73ab2 Mon Sep 17 00:00:00 2001
From: Loic Poulain <loic.poulain@linaro.org>
Date: Thu, 26 May 2022 16:37:21 +0200
Subject: [PATCH] mmc: Add support for wait_dat0 callback
There is no wait_dat0 mmc ops, causing operations waiting for data
line state change (e.g mmc_switch_voltage) to fallback to a 250ms
active delay. mmc_ops still used when DM_MMC is not enabled, which
is often the case for SPL. The result can be unexpectly long SPL
boot time.
This change adds support for wait_dat0() mmc operation.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
---
drivers/mmc/mmc.c | 3 +++
include/mmc.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 8a7d073900..12d29da528 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -34,6 +34,9 @@ static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);
static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us)
{
+ if (mmc->cfg->ops->wait_dat0)
+ return mmc->cfg->ops->wait_dat0(mmc, state, timeout_us);
+
return -ENOSYS;
}
diff --git a/include/mmc.h b/include/mmc.h
index 9b4dc68311..073b01f82b 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -561,6 +561,7 @@ struct mmc_ops {
int (*getwp)(struct mmc *mmc);
int (*host_power_cycle)(struct mmc *mmc);
int (*get_b_max)(struct mmc *mmc, void *dst, lbaint_t blkcnt);
+ int (*wait_dat0)(struct mmc *mmc, int state, int timeout_us);
};
static inline int mmc_hs400_prepare_ddr(struct mmc *mmc)
--
2.39.5