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From: Anson Huang <Anson.Huang@nxp.com>
To: mturquette@baylibre.com, sboyd@kernel.org, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, leonard.crestez@nxp.com, abel.vesa@nxp.com,
	peng.fan@nxp.com, ping.bai@nxp.com, fugang.duan@nxp.com,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH 2/4] clk: imx8mm: A53 core clock no need to be critical
Date: Tue, 25 Feb 2020 16:49:12 +0800	[thread overview]
Message-ID: <1582620554-32689-2-git-send-email-Anson.Huang@nxp.com> (raw)
In-Reply-To: <1582620554-32689-1-git-send-email-Anson.Huang@nxp.com>

'A53_CORE' is just a mux and no need to be critical, being critical
will cause its parent clock always ON which does NOT make sense,
to make sure CPU's hardware clock source NOT being disabled during
clock tree setup, need to move the 'A53_SRC'/'A53_CORE' reparent
operations to after critical clock 'ARM_CLK' setup finished.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 drivers/clk/imx/clk-imx8mm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index 9feda4f..9256704 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -440,7 +440,7 @@ static int imx8mm_clocks_probe(struct platform_device *pdev)
 	hws[IMX8MM_CLK_GPU2D_DIV] = hws[IMX8MM_CLK_GPU2D_CORE];
 
 	/* CORE SEL */
-	hws[IMX8MM_CLK_A53_CORE] = imx_clk_hw_mux2_flags("arm_a53_core", base + 0x9880, 24, 1, imx8mm_a53_core_sels, ARRAY_SIZE(imx8mm_a53_core_sels), CLK_IS_CRITICAL);
+	hws[IMX8MM_CLK_A53_CORE] = imx_clk_hw_mux2("arm_a53_core", base + 0x9880, 24, 1, imx8mm_a53_core_sels, ARRAY_SIZE(imx8mm_a53_core_sels));
 
 	/* BUS */
 	hws[IMX8MM_CLK_MAIN_AXI] = imx8m_clk_hw_composite_critical("main_axi",  imx8mm_main_axi_sels, base + 0x8800);
@@ -608,15 +608,15 @@ static int imx8mm_clocks_probe(struct platform_device *pdev)
 	hws[IMX8MM_CLK_DRAM_ALT_ROOT] = imx_clk_hw_fixed_factor("dram_alt_root", "dram_alt", 1, 4);
 	hws[IMX8MM_CLK_DRAM_CORE] = imx_clk_hw_mux2_flags("dram_core_clk", base + 0x9800, 24, 1, imx8mm_dram_core_sels, ARRAY_SIZE(imx8mm_dram_core_sels), CLK_IS_CRITICAL);
 
-	clk_hw_set_parent(hws[IMX8MM_CLK_A53_SRC], hws[IMX8MM_SYS_PLL1_800M]);
-	clk_hw_set_parent(hws[IMX8MM_CLK_A53_CORE], hws[IMX8MM_ARM_PLL_OUT]);
-
 	hws[IMX8MM_CLK_ARM] = imx_clk_hw_cpu("arm", "arm_a53_core",
 					   hws[IMX8MM_CLK_A53_CORE]->clk,
 					   hws[IMX8MM_CLK_A53_CORE]->clk,
 					   hws[IMX8MM_ARM_PLL_OUT]->clk,
 					   hws[IMX8MM_CLK_A53_DIV]->clk);
 
+	clk_hw_set_parent(hws[IMX8MM_CLK_A53_SRC], hws[IMX8MM_SYS_PLL1_800M]);
+	clk_hw_set_parent(hws[IMX8MM_CLK_A53_CORE], hws[IMX8MM_ARM_PLL_OUT]);
+
 	imx_check_clk_hws(hws, IMX8MM_CLK_END);
 
 	ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
-- 
2.7.4


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  reply	other threads:[~2020-02-25  8:55 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-25  8:49 [PATCH 1/4] clk: imx8mn: A53 core clock no need to be critical Anson Huang
2020-02-25  8:49 ` Anson Huang [this message]
2020-02-25  8:49 ` [PATCH 3/4] clk: imx8mp: " Anson Huang
2020-02-25  8:49 ` [PATCH 4/4] clk: imx8mq: " Anson Huang
2020-02-25  8:58 ` [PATCH 1/4] clk: imx8mn: " Daniel Baluta
2020-02-25  9:17   ` Anson Huang
2020-03-11  6:40 ` Shawn Guo
2020-03-11  7:01   ` Anson Huang
2020-03-11  7:12 ` Shawn Guo

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