Patch "mmc: sdhci-of-esdhc: limit SD clock for ls1012a/ls1046a" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

mmc: sdhci-of-esdhc: limit SD clock for ls1012a/ls1046a

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     mmc-sdhci-of-esdhc-limit-sd-clock-for-ls1012a-ls1046a.patch

and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: yangbo lu <[email protected]>
Date: Thu, 20 Apr 2017 14:58:29 +0800
Subject: mmc: sdhci-of-esdhc: limit SD clock for ls1012a/ls1046a

From: yangbo lu <[email protected]>

[ Upstream commit a627f025eb0534052ff451427c16750b3530634c ]

The ls1046a datasheet specified that the max SD clock frequency for eSDHC SDR104/HS200 was 167MHz, and the ls1012a datasheet specified it's 125MHz for ls1012a. So this patch is to add the limitation.

---
 drivers/mmc/host/sdhci-of-esdhc.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

@@ -418,6 +418,20 @@ static void esdhc_of_set_clock(struct sd
 	if (esdhc->vendor_ver < VENDOR_V_23)
 		pre_div = 2;
 
+	/*
+	 * Limit SD clock to 167MHz for ls1046a according to its datasheet
+	 */
+	if (clock > 167000000 &&
+	    of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc"))
+		clock = 167000000;
+
+	/*
+	 * Limit SD clock to 125MHz for ls1012a according to its datasheet
+	 */
+	if (clock > 125000000 &&
+	    of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc"))
+		clock = 125000000;
+
 	/* Workaround to reduce the clock frequency for p1010 esdhc */
 	if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
 		if (clock > 20000000)

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/mmc-sdhci-of-esdhc-limit-sd-clock-for-ls1012a-ls1046a.patch