openwrt/target/linux/at91/patches-5.15/105-clk-at91-clk-master-mask-mckr-against-layout-mask.patch

From 27c11c09346b7b9f67eeb39db1b943f4a9742ff3 Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Mon, 11 Oct 2021 14:27:13 +0300
Subject: [PATCH 241/247] clk: at91: clk-master: mask mckr against layout->mask

Mask values read/written from/to MCKR against layout->mask as this
mask may be different b/w PMC versions.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20211011112719.3951784-10-claudiu.beznea@microchip.com
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/at91/clk-master.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -186,8 +186,8 @@ static int clk_master_div_set_rate(struc
 	if (ret)
 		goto unlock;
 
-	tmp = mckr & master->layout->mask;
-	tmp = (tmp >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK;
+	mckr &= master->layout->mask;
+	tmp = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK;
 	if (tmp == div)
 		goto unlock;
 
@@ -384,6 +384,7 @@ static unsigned long clk_master_pres_rec
 	regmap_read(master->regmap, master->layout->offset, &val);
 	spin_unlock_irqrestore(master->lock, flags);
 
+	val &= master->layout->mask;
 	pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;
 	if (pres == MASTER_PRES_MAX && characteristics->have_div3_pres)
 		pres = 3;
@@ -403,6 +404,8 @@ static u8 clk_master_pres_get_parent(str
 	regmap_read(master->regmap, master->layout->offset, &mckr);
 	spin_unlock_irqrestore(master->lock, flags);
 
+	mckr &= master->layout->mask;
+
 	return mckr & AT91_PMC_CSS;
 }