From: Claudiu Beznea Date: Fri, 29 Sep 2023 05:38:51 +0000 (+0300) Subject: clk: renesas: rzg2l: Trust value returned by hardware X-Git-Tag: microblaze-v6.8~151^2~1^2^2~11 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=bf51d3b2d048c312764a55d91d67a85ee5535e31;p=linux-2.6-microblaze.git clk: renesas: rzg2l: Trust value returned by hardware The onitial value of the CPG_PL2SDHI_DSEL bits 0..1 or 4..6 is 01b. The hardware user's manual (r01uh0914ej0130-rzg2l-rzg2lc.pdf) specifies that setting 0 is prohibited. Hence rzg2l_cpg_sd_clk_mux_get_parent() should just read CPG_PL2SDHI_DSEL, trust the value, and return the proper clock parent index based on the value read. Fixes: eaff33646f4cb ("clk: renesas: rzg2l: Add SDHI clk mux support") Signed-off-by: Claudiu Beznea Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20230929053915.1530607-5-claudiu.beznea@bp.renesas.com Signed-off-by: Geert Uytterhoeven --- diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index 0679f2c7649e..6f50f0329ecf 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -238,14 +238,8 @@ static u8 rzg2l_cpg_sd_clk_mux_get_parent(struct clk_hw *hw) val >>= GET_SHIFT(hwdata->conf); val &= GENMASK(GET_WIDTH(hwdata->conf) - 1, 0); - if (val) { - val--; - } else { - /* Prohibited clk source, change it to 533 MHz(reset value) */ - rzg2l_cpg_sd_clk_mux_set_parent(hw, 0); - } - return val; + return val ? val - 1 : 0; } static const struct clk_ops rzg2l_cpg_sd_clk_mux_ops = {