[PATCH 3/7] mmc: sdhci-of-arasan: Skip Auto tuning for DDR50 mode in ZynqMP platform
flat view
STALE1927d
LANDED
From: Manish Narani <hidden>
Date: 2021-06-15 10:44:46
Also in:
linux-mmc, lkml
Subsystem:
arm/zynq architecture, multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Michal Simek, Ulf Hansson, Adrian Hunter, Linus Torvalds
Landed in mainline as 256e4e4e836c on 2021-08-24.
ZynqMP platform does not perform auto tuning in DDR50 mode. Skip the same while the card is operating in DDR50 mode. Signed-off-by: Manish Narani <redacted> --- drivers/mmc/host/sdhci-of-arasan.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index b13e719..1980d0b 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c@@ -894,6 +894,10 @@ static int arasan_zynqmp_execute_tuning(struct mmc_host *mmc, u32 opcode) NODE_SD_1; int err; + /* ZynqMP SD controller does not perform auto tuning in DDR50 mode */ + if (mmc->ios.timing == MMC_TIMING_UHS_DDR50) + return 0; + arasan_zynqmp_dll_reset(host, device_id); err = sdhci_execute_tuning(mmc, opcode);
--
2.1.1
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