linux-kernel - [PATCH v2 2/7] mmc: sdhci_am654: Write ITAPDLY for DDR52 timing

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Message-ID: <20240207011520.3128382-3-jm@ti.com>
Date: Tue, 6 Feb 2024 19:15:15 -0600
From: Judith Mendez <jm@...com>
To: Ulf Hansson <ulf.hansson@...aro.org>
CC: Adrian Hunter <adrian.hunter@...el.com>, <linux-mmc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 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>
---
Changelog:
v1->v2:
- Call sdhci_am654_write_itapdly() in sdhci_am654_set_clock()
 instead of sdhci_am654_setup_dll()
---
 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 2c66a965c225..b50db5d4a452 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -299,6 +299,7 @@ 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_write_itapdly(sdhci_am654, sdhci_am654->itap_del_sel[timing]);
 		sdhci_am654->dll_enable = true;
 	} else {
 		sdhci_am654_setup_delay_chain(sdhci_am654, timing);
-- 
2.43.0