This is a note to let you know that I've just added the patch titled
clk: qcom: clk-alpha-pll: set ALPHA_EN bit for Stromer Plus PLLs
to the 6.9-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-qcom-clk-alpha-pll-set-alpha_en-bit-for-stromer-.patch
and it can be found in the queue-6.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e412cb0d807fe5ead4623fa6b4b491840c2dadb5
Author: Gabor Juhos <j4g8y7@xxxxxxxxx>
Date: Wed May 8 22:34:14 2024 +0200
clk: qcom: clk-alpha-pll: set ALPHA_EN bit for Stromer Plus PLLs
[ Upstream commit 5a33a64524e6381c399e5e42571d9363ffc0bed4 ]
The clk_alpha_pll_stromer_plus_set_rate() function does not
sets the ALPHA_EN bit in the USER_CTL register, so setting
rates which requires using alpha mode works only if the bit
gets set already prior calling the function.
Extend the function to set the ALPHA_EN bit in order to allow
using fractional rates regardless whether the bit gets set
previously or not.
Fixes: 84da48921a97 ("clk: qcom: clk-alpha-pll: introduce stromer plus ops")
Signed-off-by: Gabor Juhos <j4g8y7@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240508-stromer-plus-alpha-en-v1-1-6639ce01ca5b@xxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index be18ff983d35c..003308a288968 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -2555,6 +2555,9 @@ static int clk_alpha_pll_stromer_plus_set_rate(struct clk_hw *hw,
regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll),
a >> ALPHA_BITWIDTH);
+ regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_ALPHA_EN, PLL_ALPHA_EN);
+
regmap_write(pll->clkr.regmap, PLL_MODE(pll), PLL_BYPASSNL);
/* Wait five micro seconds or more */
