Since neither 'alpha' nor 'alpha_hi' is defined in the configuration, those will be initialized with zero values implicitly. By using zero alpha values, the output rate of the PLL will be the same whether alpha mode is enabled or not. Remove the superfluous initialization of the 'alpha_en_mask' member to make it clear that enabling alpha mode is not required to get the desired output rate. Despite that enabling alpha mode is not needed for the initial configuration, the set_rate() op might require that it is enabled already. In this particular case however, the clk_alpha_pll_stromer_plus_set_rate() function will get reset the ALPHA_EN bit when the PLL's rate changes, so dropping 'alpha_en_mask' is safe. While at it, also add a comment to indicate the frequency the PLL runs at with the current configuration. No functional changes, the initial rate of the PLL is the same both before and after the patch. Tested on Xiaomi Router BE3600 2.5G (IPQ5312, out-of-tree board). Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Gabor Juhos <j4g8y7@xxxxxxxxx> --- Changes in v2: - extend the commit message to indicate that dropping 'alpha_en_mask' is safe - add RB tag from Dmitry - Link to v1: https://lore.kernel.org/r/20241021-alpha-mode-cleanup-v1-2-55df8ed73645@xxxxxxxxx --- drivers/clk/qcom/apss-ipq-pll.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/qcom/apss-ipq-pll.c b/drivers/clk/qcom/apss-ipq-pll.c index dec2a5019cc77bf60142a86453883e336afc860f..d6c1aea7e9e1e50a8d7561ce352feac4e76fb1e3 100644 --- a/drivers/clk/qcom/apss-ipq-pll.c +++ b/drivers/clk/qcom/apss-ipq-pll.c @@ -79,13 +79,13 @@ static const struct alpha_pll_config ipq5018_pll_config = { .test_ctl_hi_val = 0x00400003, }; +/* 1.080 GHz configuration */ static const struct alpha_pll_config ipq5332_pll_config = { .l = 0x2d, .config_ctl_val = 0x4001075b, .main_output_mask = BIT(0), .aux_output_mask = BIT(1), .early_output_mask = BIT(3), - .alpha_en_mask = BIT(24), .status_val = 0x3, .status_mask = GENMASK(10, 8), .lock_det = BIT(2), -- 2.47.0
