linux-kernel - [PATCH v1] clk: imx: imx8-acm: fix flags for acm clocks

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Message-ID: <20250113094654.12998-1-eichest@gmail.com>
Date: Mon, 13 Jan 2025 10:46:08 +0100
From: Stefan Eichenberger <eichest@...il.com>
To: abelvesa@...nel.org,
	peng.fan@....com,
	mturquette@...libre.com,
	sboyd@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	shengjiu.wang@....com,
	francesco.dolcini@...adex.com
Cc: linux-clk@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Stefan Eichenberger <stefan.eichenberger@...adex.com>,
	stable@...r.kernel.org
Subject: [PATCH v1] clk: imx: imx8-acm: fix flags for acm clocks

From: Stefan Eichenberger <stefan.eichenberger@...adex.com>

Currently, the flags for the ACM clocks are set to 0. This configuration
causes the fsl-sai audio driver to fail when attempting to set the
sysclk, returning an EINVAL error. The following error messages
highlight the issue:
fsl-sai 59090000.sai: ASoC: error at snd_soc_dai_set_sysclk on 59090000.sai: -22
imx-hdmi sound-hdmi: failed to set cpu sysclk: -22

By setting the flag CLK_SET_RATE_NO_REPARENT, we signal that the ACM
driver does not support reparenting and instead relies on the clock tree
as defined in the device tree. This change resolves the issue with the
fsl-sai audio driver.

CC: stable@...r.kernel.org
Fixes: d3a0946d7ac9 ("clk: imx: imx8: add audio clock mux driver")
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>
---
 drivers/clk/imx/clk-imx8-acm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx8-acm.c b/drivers/clk/imx/clk-imx8-acm.c
index c169fe53a35f..f20832a17ea3 100644
--- a/drivers/clk/imx/clk-imx8-acm.c
+++ b/drivers/clk/imx/clk-imx8-acm.c
@@ -371,7 +371,8 @@ static int imx8_acm_clk_probe(struct platform_device *pdev)
 	for (i = 0; i < priv->soc_data->num_sels; i++) {
 		hws[sels[i].clkid] = devm_clk_hw_register_mux_parent_data_table(dev,
 										sels[i].name, sels[i].parents,
-										sels[i].num_parents, 0,
+										sels[i].num_parents,
+										CLK_SET_RATE_NO_REPARENT,
 										base + sels[i].reg,
 										sels[i].shift, sels[i].width,
 										0, NULL, NULL);
-- 
2.45.2