linux-kernel - [PATCH 5.15 073/779] mtd: rawnand: arasan: Update NAND bus clock instead of system clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 15 Aug 2022 19:55:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Amit Kumar Mahapatra <amit.kumar-mahapatra@...inx.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 5.15 073/779] mtd: rawnand: arasan: Update NAND bus clock instead of system clock

From: Amit Kumar Mahapatra <amit.kumar-mahapatra@...inx.com>

commit 7499bfeedb47efc1ee4dc793b92c610d46e6d6a6 upstream.

In current implementation the Arasan NAND driver is updating the
system clock(i.e., anand->clk) in accordance to the timing modes
(i.e., SDR or NVDDR). But as per the Arasan NAND controller spec the
flash clock or the NAND bus clock(i.e., nfc->bus_clk), need to be
updated instead. This patch keeps the system clock unchanged and updates
the NAND bus clock as per the timing modes.

Fixes: 197b88fecc50 ("mtd: rawnand: arasan: Add new Arasan NAND controller")
CC: stable@...r.kernel.org # 5.8+
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@...inx.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/20220628154824.12222-2-amit.kumar-mahapatra@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/mtd/nand/raw/arasan-nand-controller.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -347,17 +347,17 @@ static int anfc_select_target(struct nan
 
 	/* Update clock frequency */
 	if (nfc->cur_clk != anand->clk) {
-		clk_disable_unprepare(nfc->controller_clk);
-		ret = clk_set_rate(nfc->controller_clk, anand->clk);
+		clk_disable_unprepare(nfc->bus_clk);
+		ret = clk_set_rate(nfc->bus_clk, anand->clk);
 		if (ret) {
 			dev_err(nfc->dev, "Failed to change clock rate\n");
 			return ret;
 		}
 
-		ret = clk_prepare_enable(nfc->controller_clk);
+		ret = clk_prepare_enable(nfc->bus_clk);
 		if (ret) {
 			dev_err(nfc->dev,
-				"Failed to re-enable the controller clock\n");
+				"Failed to re-enable the bus clock\n");
 			return ret;
 		}