[U-Boot] [PATCH 03/12] mmc: sdhci: Add support for platform/board specific tuning
Siva Durga Prasad Paladugu
siva.durga.paladugu at xilinx.com
Wed Jan 18 10:04:22 CET 2017
Add support to execute platform/board specific tuning needed
for SDR104 and SDR50 UHS modes.This patch adds hook routine
to support specific tuning requirements.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur at xilinx.com>
---
drivers/mmc/sdhci.c | 8 ++++++++
include/sdhci.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 5ae56e0..7b968d5 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -309,11 +309,19 @@ static int sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
struct mmc_cmd cmd;
struct mmc_data data;
u32 ctrl;
+ int err;
u8 tuning_loop_counter = 40;
struct sdhci_host *host = mmc->priv;
debug("%s\n", __func__);
+ if (host->ops->platform_execute_tuning) {
+ err = host->ops->platform_execute_tuning(mmc, opcode);
+ if (err)
+ return err;
+ return 0;
+ }
+
ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
ctrl |= SDHCI_CTRL_EXEC_TUNING;
sdhci_writew(host, ctrl, SDHCI_HOST_CTRL2);
diff --git a/include/sdhci.h b/include/sdhci.h
index 4d877eb..ae19be6 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -249,6 +249,7 @@ struct sdhci_ops {
int (*get_cd)(struct sdhci_host *host);
void (*set_control_reg)(struct sdhci_host *host);
void (*set_clock)(struct sdhci_host *host, u32 div);
+ int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
};
struct sdhci_host {
--
2.7.4
More information about the U-Boot
mailing list