linux-kernel - [PATCH v5 2/7] mmc: sdhci_am654: Write ITAPDLY for DDR52 timing

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Date: Wed, 20 Mar 2024 17:38:32 -0500
From: Judith Mendez <jm@...com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter
	<adrian.hunter@...el.com>
CC: Andrew Davis <afd@...com>, <linux-mmc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 2/7] mmc: sdhci_am654: Write ITAPDLY for DDR52 timing

For DDR52 timing, DLL is enabled but tuning is not carried
out, therefore the ITAPDLY value in PHY CTRL 4 register is
not correct. Fix this by writing ITAPDLY after enabling DLL.

Fixes: a161c45f2979 ("mmc: sdhci_am654: Enable DLL only for some speed modes")
Signed-off-by: Judith Mendez <jm@...com>
Reviewed-by: Andrew Davis <afd@...com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
---
Changelog:
v4->v5:
- no change
---
 drivers/mmc/host/sdhci_am654.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index d8c9821b0b66..cfb614d0b42b 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -300,6 +300,7 @@ static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock)
 	if (timing > MMC_TIMING_UHS_SDR25 && clock >= CLOCK_TOO_SLOW_HZ) {
 		sdhci_am654_setup_dll(host, clock);
 		sdhci_am654->dll_enable = true;
+		sdhci_am654_write_itapdly(sdhci_am654, sdhci_am654->itap_del_sel[timing]);
 	} else {
 		sdhci_am654_setup_delay_chain(sdhci_am654, timing);
 		sdhci_am654->dll_enable = false;
-- 
2.43.2