| Message ID | 20240722063309.60054-1-krzysztof.kozlowski@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | clk: samsung: fix getting Exynos4 fin_pll rate from external clocks | expand |
On 22.07.2024 08:33, Krzysztof Kozlowski wrote: > Commit 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the > fixed rate clocks") claimed registering clkdev lookup is not necessary > anymore, but that was not entirely true: Exynos4210/4212/4412 clock code > still relied on it to get the clock rate of xxti or xusbxti external > clocks. > > Drop that requirement by accessing already registered clk_hw when > looking up the xxti/xusbxti rate. > > Reported-by: Artur Weber <aweber.kernel@gmail.com> > Closes: https://lore.kernel.org/all/6227c1fb-d769-462a-b79b-abcc15d3db8e@gmail.com/ > Fixes: 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the fixed rate clocks") > Cc: <stable@vger.kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Seems to fix the warning for me on the Samsung Galaxy Tab 3 8.0, so: Tested-by: Artur Weber <aweber.kernel@gmail.com> # Exynos4212 Thanks for the patch! Best regards Artur
Quoting Krzysztof Kozlowski (2024-07-21 23:33:09) > Commit 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the > fixed rate clocks") claimed registering clkdev lookup is not necessary > anymore, but that was not entirely true: Exynos4210/4212/4412 clock code > still relied on it to get the clock rate of xxti or xusbxti external > clocks. > > Drop that requirement by accessing already registered clk_hw when > looking up the xxti/xusbxti rate. > > Reported-by: Artur Weber <aweber.kernel@gmail.com> > Closes: https://lore.kernel.org/all/6227c1fb-d769-462a-b79b-abcc15d3db8e@gmail.com/ > Fixes: 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the fixed rate clocks") > Cc: <stable@vger.kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > --- Applied to clk-next
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c index a026ccca7315..28945b6b0ee1 100644 --- a/drivers/clk/samsung/clk-exynos4.c +++ b/drivers/clk/samsung/clk-exynos4.c @@ -1040,19 +1040,20 @@ static unsigned long __init exynos4_get_xom(void) static void __init exynos4_clk_register_finpll(struct samsung_clk_provider *ctx) { struct samsung_fixed_rate_clock fclk; - struct clk *clk; - unsigned long finpll_f = 24000000; + unsigned long finpll_f; + unsigned int parent; char *parent_name; unsigned int xom = exynos4_get_xom(); parent_name = xom & 1 ? "xusbxti" : "xxti"; - clk = clk_get(NULL, parent_name); - if (IS_ERR(clk)) { + parent = xom & 1 ? CLK_XUSBXTI : CLK_XXTI; + + finpll_f = clk_hw_get_rate(ctx->clk_data.hws[parent]); + if (!finpll_f) { pr_err("%s: failed to lookup parent clock %s, assuming " "fin_pll clock frequency is 24MHz\n", __func__, parent_name); - } else { - finpll_f = clk_get_rate(clk); + finpll_f = 24000000; } fclk.id = CLK_FIN_PLL;
Commit 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the fixed rate clocks") claimed registering clkdev lookup is not necessary anymore, but that was not entirely true: Exynos4210/4212/4412 clock code still relied on it to get the clock rate of xxti or xusbxti external clocks. Drop that requirement by accessing already registered clk_hw when looking up the xxti/xusbxti rate. Reported-by: Artur Weber <aweber.kernel@gmail.com> Closes: https://lore.kernel.org/all/6227c1fb-d769-462a-b79b-abcc15d3db8e@gmail.com/ Fixes: 0dc83ad8bfc9 ("clk: samsung: Don't register clkdev lookup for the fixed rate clocks") Cc: <stable@vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- drivers/clk/samsung/clk-exynos4.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)