openwrt/target/linux/at91/patches-5.10/242-clk-at91-clk-master-fix-prescaler-logic.patch
Claudiu Beznea e58cd453d5 at91: add kernel support for sama7g5 soc
Add kernel support for SAMA7G5 by back-porting mainline kernel patches.
Among SAMA7G5 features could be remembered:
- ARM Cortex-A7
- double data rate multi-port dynamic RAM controller supporting DDR2,
  DDR3, DDR3L, LPDDR2, LPDDR3 up to 533MHz
- peripherals for audio, video processing
- 1 gigabit + 1 megabit Ethernet controllers
- 6 CAN controllers
- trust zone support
- DVFS for CPU
- criptography IPs

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
2022-02-24 19:05:28 +01:00

35 lines
1.3 KiB
Diff

From 4375cd63b55860f5e82618dc5f50846b3129842a Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Mon, 11 Oct 2021 14:27:14 +0300
Subject: [PATCH 242/247] clk: at91: clk-master: fix prescaler logic
When prescaler value read from register is MASTER_PRES_MAX it means
that the input clock will be divided by 3. Fix the code to reflect
this.
Fixes: 7a110b9107ed8 ("clk: at91: clk-master: re-factor master clock")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20211011112719.3951784-11-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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index 6da9ae34313a..e67bcd03a827 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -386,7 +386,7 @@ static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw,
val &= master->layout->mask;
pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;
- if (pres == 3 && characteristics->have_div3_pres)
+ if (pres == MASTER_PRES_MAX && characteristics->have_div3_pres)
pres = 3;
else
pres = (1 << pres);
--
2.32.0