From d70486668cdf51b14a50425ab45fc18677a167b2 Mon Sep 17 00:00:00 2001
From: Esben Haabendal <esben@geanix.com>
Date: Fri, 17 Jan 2020 21:05:37 +0100
Subject: [PATCH] mtd: rawnand: gpmi: Restore nfc timing setup after suspend/resume
Git-commit: d70486668cdf51b14a50425ab45fc18677a167b2
Patch-mainline: v5.5-rc7
References: git-fixes
As we reset the GPMI block at resume, the timing parameters setup by a
previous exec_op is lost. Rewriting GPMI timing registers on first exec_op
after resume fixes the problem.
Fixes: ef347c0cfd61 ("mtd: rawnand: gpmi: Implement exec_op")
Cc: stable@vger.kernel.org
Signed-off-by: Esben Haabendal <esben@geanix.com>
Acked-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 879df8402446..b9d5d55a5edb 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -2727,6 +2727,10 @@ static int gpmi_pm_resume(struct device *dev)
return ret;
}
+ /* Set flag to get timing setup restored for next exec_op */
+ if (this->hw.clk_rate)
+ this->hw.must_apply_timings = true;
+
/* re-init the BCH registers */
ret = bch_set_geometry(this);
if (ret) {
--
2.16.4