This is a note to let you know that I've just added the patch titled clk: at91: clk-master: fix prescaler logic to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: clk-at91-clk-master-fix-prescaler-logic.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 2eebee5b4578fe58d5f3e52d9226633aad262053 Author: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> Date: Mon Oct 11 14:27:14 2021 +0300 clk: at91: clk-master: fix prescaler logic [ Upstream commit 0ef99f8202c5078a72c05af76bfaed2ea4daab19 ] 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@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20211011112719.3951784-11-claudiu.beznea@xxxxxxxxxxxxx Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c index 2e410815a3405..04d0dd8385945 100644 --- a/drivers/clk/at91/clk-master.c +++ b/drivers/clk/at91/clk-master.c @@ -309,7 +309,7 @@ static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw, spin_unlock_irqrestore(master->lock, flags); 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);