5.4-stable review patch. If anyone has any objections, please let me know.
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From: Gabor Juhos j4g8y7@gmail.com
commit 36d202241d234fa4ac50743510d098ad52bd193a upstream.
The comment before the config of the GPLL3 PLL says that the PLL should run at 930 MHz. In contrary to this, calculating the frequency from the current configuration values by using 19.2 MHz as input frequency defined in 'qcs404.dtsi', it gives 921.6 MHz:
$ xo=19200000; l=48; alpha=0x0; alpha_hi=0x0 $ echo "$xo * ($((l)) + $(((alpha_hi << 32 | alpha) >> 8)) / 2^32)" | bc -l 921600000.00000000000000000000
Set 'alpha_hi' in the configuration to a value used in downstream kernels [1][2] in order to get the correct output rate:
$ xo=19200000; l=48; alpha=0x0; alpha_hi=0x70 $ echo "$xo * ($((l)) + $(((alpha_hi << 32 | alpha) >> 8)) / 2^32)" | bc -l 930000000.00000000000000000000
The change is based on static code analysis, compile tested only.
[1] https://git.codelinaro.org/clo/la/kernel/msm-5.4/-/blob/kernel.lnx.5.4.r56-r... [2} https://git.codelinaro.org/clo/la/kernel/msm-5.15/-/blob/kernel.lnx.5.15.r49...
Cc: stable@vger.kernel.org Fixes: 652f1813c113 ("clk: qcom: gcc: Add global clock controller driver for QCS404") Signed-off-by: Gabor Juhos j4g8y7@gmail.com Link: https://lore.kernel.org/r/20241022-fix-gcc-qcs404-gpll3-v1-1-c4d30d634d19@gm... Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/clk/qcom/gcc-qcs404.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/clk/qcom/gcc-qcs404.c +++ b/drivers/clk/qcom/gcc-qcs404.c @@ -337,6 +337,7 @@ static struct clk_alpha_pll gpll1_out_ma /* 930MHz configuration */ static const struct alpha_pll_config gpll3_config = { .l = 48, + .alpha_hi = 0x70, .alpha = 0x0, .alpha_en_mask = BIT(24), .post_div_mask = 0xf << 8,