From: Esben Haabendal <esben@geanix.com>
Date: Fri, 17 Jan 2020 20:05:37 +0000 (+0100)
Subject: mtd: rawnand: gpmi: Restore nfc timing setup after suspend/resume
X-Git-Tag: v5.5-rc7~4^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d70486668cdf51b14a50425ab45fc18677a167b2;p=thirdparty%2Flinux.git

mtd: rawnand: gpmi: Restore nfc timing setup after suspend/resume

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>
---

diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 879df84024468..b9d5d55a5edb9 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) {