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From: Shawn Guo <shawn.guo@linaro.org>
To: Stephen Boyd <sboyd@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Sivaprakash Murugesan <sivaprak@codeaurora.org>,
	Benjamin Li <benl@squareup.com>,
	devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-clk@vger.kernel.org, Shawn Guo <shawn.guo@linaro.org>
Subject: [PATCH 1/5] clk: qcom: apcs-msm8916: Flag a53mux instead of a53pll as critical
Date: Tue,  4 May 2021 13:28:40 +0800	[thread overview]
Message-ID: <20210504052844.21096-2-shawn.guo@linaro.org> (raw)
In-Reply-To: <20210504052844.21096-1-shawn.guo@linaro.org>

The clock source for MSM8916 cpu cores is like below.

                        |\
         a53pll --------| \ a53mux     +------+
                        | |------------| cpus |
     gpll0_vote --------| /            +------+
                        |/

So clock a53mux rather than a53pll is actually the clock source of cpu
cores.  It makes more sense to flag a53mux rather than a53pll as
critical, since a53pll could be irrelevant if a53mux switches its parent
clock to be gpll0_vote.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/clk/qcom/a53-pll.c      | 1 -
 drivers/clk/qcom/apcs-msm8916.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/a53-pll.c b/drivers/clk/qcom/a53-pll.c
index 45cfc57bff92..8614b0b0e82c 100644
--- a/drivers/clk/qcom/a53-pll.c
+++ b/drivers/clk/qcom/a53-pll.c
@@ -70,7 +70,6 @@ static int qcom_a53pll_probe(struct platform_device *pdev)
 	init.parent_names = (const char *[]){ "xo" };
 	init.num_parents = 1;
 	init.ops = &clk_pll_sr2_ops;
-	init.flags = CLK_IS_CRITICAL;
 	pll->clkr.hw.init = &init;
 
 	ret = devm_clk_register_regmap(dev, &pll->clkr);
diff --git a/drivers/clk/qcom/apcs-msm8916.c b/drivers/clk/qcom/apcs-msm8916.c
index cf69a97d0439..d7ac6d6b15b6 100644
--- a/drivers/clk/qcom/apcs-msm8916.c
+++ b/drivers/clk/qcom/apcs-msm8916.c
@@ -65,7 +65,7 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev)
 	init.parent_data = pdata;
 	init.num_parents = ARRAY_SIZE(pdata);
 	init.ops = &clk_regmap_mux_div_ops;
-	init.flags = CLK_SET_RATE_PARENT;
+	init.flags = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT;
 
 	a53cc->clkr.hw.init = &init;
 	a53cc->clkr.regmap = regmap;
-- 
2.17.1


  reply	other threads:[~2021-05-04  5:28 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-04  5:28 [PATCH 0/5] Add MSM8939 APCS/A53PLL clock support Shawn Guo
2021-05-04  5:28 ` Shawn Guo [this message]
2021-06-28  0:27   ` [PATCH 1/5] clk: qcom: apcs-msm8916: Flag a53mux instead of a53pll as critical Stephen Boyd
2021-06-29  2:37     ` Shawn Guo
2021-05-04  5:28 ` [PATCH 2/5] dt-bindings: clock: update qcom,a53pll bindings for MSM8939 support Shawn Guo
2021-05-06 20:27   ` Rob Herring
2021-05-07  0:18     ` Shawn Guo
2021-05-04  5:28 ` [PATCH 3/5] clk: qcom: apcs-msm8916: Retrieve clock name from DT Shawn Guo
2021-06-28  0:28   ` Stephen Boyd
2021-06-29 13:36     ` Shawn Guo
2021-06-29 15:57       ` Bjorn Andersson
2021-06-29 20:23         ` Stephen Boyd
2021-06-29 20:39           ` Bjorn Andersson
2021-05-04  5:28 ` [PATCH 4/5] clk: qcom: a53-pll: Pass freq_tbl via match data Shawn Guo
2021-05-04  5:28 ` [PATCH 5/5] clk: qcom: a53-pll: Add MSM8939 a53pll clocks Shawn Guo
2021-06-28  0:24   ` Stephen Boyd
2021-06-21  6:37 ` [PATCH 0/5] Add MSM8939 APCS/A53PLL clock support Shawn Guo

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