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From: Jacky Bai <ping.bai@nxp.com>
To: shawnguo@kernel.org, robh+dt@kernel.org, sboyd@kernel.org,
	abel.vesa@nxp.com, s.hauer@pengutronix.de,
	p.zabel@pengutronix.de
Cc: kernel@pengutronix.de, linux-imx@nxp.com,
	linux-clk@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH 5/9] clk: imx: Add 'CLK_SET_RATE_NO_REPARENT' for composite-7ulp
Date: Mon, 19 Jul 2021 13:34:26 +0800	[thread overview]
Message-ID: <20210719053430.1442505-6-ping.bai@nxp.com> (raw)
In-Reply-To: <20210719053430.1442505-1-ping.bai@nxp.com>

For the imx_composite-7ulp clock type, The clock parent should
be changed explicitly by end user of this clock, if the the
'CLK_SET_RATE_NO_REPARENT' flag is not set, when user want to
set a clock frequency that can NOT get from HW accurately, then
the clock's parent will be switch to another clock parent sometimes.
This is NOT what we expected and introduced some additional debug
effort, so add the 'CLK_SET_RATE_NO_REPARENT' to avoid such unexpected
result.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 drivers/clk/imx/clk-composite-7ulp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-composite-7ulp.c b/drivers/clk/imx/clk-composite-7ulp.c
index ba48445a0007..99a36a73dcb5 100644
--- a/drivers/clk/imx/clk-composite-7ulp.c
+++ b/drivers/clk/imx/clk-composite-7ulp.c
@@ -130,7 +130,7 @@ static struct clk_hw *imx_ulp_clk_hw_composite(const char *name,
 				       mux_hw, &clk_mux_ops, fd_hw,
 				       &clk_fractional_divider_ops, gate_hw,
 				       has_swrst ? &pcc_gate_ops : &clk_gate_ops, CLK_SET_RATE_GATE |
-				       CLK_SET_PARENT_GATE);
+				       CLK_SET_PARENT_GATE | CLK_SET_RATE_NO_REPARENT);
 	if (IS_ERR(hw)) {
 		kfree(mux);
 		kfree(fd);
-- 
2.26.2


  parent reply	other threads:[~2021-07-19  5:24 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19  5:34 [PATCH 0/9] Add imx8ulp clock & reset driver support Jacky Bai
2021-07-19  5:34 ` [PATCH 1/9] dt-bindings: clock: Add imx8ulp clock support Jacky Bai
2021-07-29 18:55   ` Rob Herring
2021-07-30 10:05     ` Jacky Bai
2021-07-19  5:34 ` [PATCH 2/9] clk: imx: Update the pllv4 to support imx8ulp Jacky Bai
2021-07-19  5:34 ` [PATCH 3/9] clk: imx: Update the compsite driver " Jacky Bai
2021-07-19  5:34 ` [PATCH 4/9] clk: imx: disable i.mx7ulp composite clock during initialization Jacky Bai
2021-07-19  5:34 ` Jacky Bai [this message]
2021-07-19  5:34 ` [PATCH 6/9] clk: imx: disable the pfd when set pfdv2 clock rate Jacky Bai
2021-07-19  5:34 ` [PATCH 7/9] clk: imx: Update the pfdv2 for 8ulp specific support Jacky Bai
2021-07-19  5:34 ` [PATCH 8/9] clk: imx: Add clock driver for imx8ulp Jacky Bai
2021-07-19  5:34 ` [PATCH 9/9] clk: imx: Add the pcc reset controller support on imx8ulp Jacky Bai
2021-07-19  6:23   ` Liu Ying

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