[PATCH 5.13 244/380] nvmem: qfprom: Fix up qfprom_disable_fuse_blowing() ordering

From: Greg Kroah-Hartman
Date: Thu Sep 16 2021 - 13:03:09 EST


From: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>

[ Upstream commit 11c4b3e264d68ba6dcd52d12dbcfd3f564f2f137 ]

qfprom_disable_fuse_blowing() disables a bunch of resources,
and then does a few register writes in the 'conf' address
space.
It works perhaps because the resources are needed only for the
'raw' register space writes, and that the 'conf' space allows
read/writes regardless.
However that makes the code look confusing, so just move the
register writes before turning off the resources in the
function.

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210806085947.22682-3-srinivas.kandagatla@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvmem/qfprom.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index d6d3f24685a8..f372eda2b255 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -138,6 +138,9 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv,
{
int ret;

+ writel(old->timer_val, priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);
+ writel(old->accel_val, priv->qfpconf + QFPROM_ACCEL_OFFSET);
+
/*
* This may be a shared rail and may be able to run at a lower rate
* when we're not blowing fuses. At the moment, the regulator framework
@@ -158,9 +161,6 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv,
"Failed to set clock rate for disable (ignoring)\n");

clk_disable_unprepare(priv->secclk);
-
- writel(old->timer_val, priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);
- writel(old->accel_val, priv->qfpconf + QFPROM_ACCEL_OFFSET);
}

/**
--
2.30.2