[PATCH] clk: imx8mq: prevent sys1_pll_266m gating

From: Lucas Stach <l.stach@pengutronix.de>
To: Shawn Guo <shawnguo@kernel.org>
Cc: Abel Vesa <abel.vesa@nxp.com>, NXP Linux Team <linux-imx@nxp.com>,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	kernel@pengutronix.de, patchwork-lst@pengutronix.de
Subject: [PATCH] clk: imx8mq: prevent sys1_pll_266m gating
Date: Fri,  7 May 2021 19:10:28 +0200	[thread overview]
Message-ID: <20210507171028.157728-1-l.stach@pengutronix.de> (raw)

Gating sys1_pll_266m while the usdhc_nand_bus clock is still active (due
to being enabled in to bootloader) leads to spurious failures of the
uSDHC module.

b04383b6a558 ("clk: imx8mq: Define gates for pll1/2 fixed dividers")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
We probably need some solution to keep parent clocks active on the i.MX8M clock
architecture, as long as any consumers are active, as the reference manual
states that disabling a parent clock may lead to undefined behavior. This needs
more work in the clock framework and/or driver. This patch fixes the obvious
regression until we have such a solution.
---
 drivers/clk/imx/clk-imx8mq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
index 4dd4ae9d022b..fce983add1fc 100644
--- a/drivers/clk/imx/clk-imx8mq.c
+++ b/drivers/clk/imx/clk-imx8mq.c
@@ -372,7 +372,6 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
 	hws[IMX8MQ_SYS1_PLL_133M_CG] = imx_clk_hw_gate("sys1_pll_133m_cg", "sys1_pll_out", base + 0x30, 15);
 	hws[IMX8MQ_SYS1_PLL_160M_CG] = imx_clk_hw_gate("sys1_pll_160m_cg", "sys1_pll_out", base + 0x30, 17);
 	hws[IMX8MQ_SYS1_PLL_200M_CG] = imx_clk_hw_gate("sys1_pll_200m_cg", "sys1_pll_out", base + 0x30, 19);
-	hws[IMX8MQ_SYS1_PLL_266M_CG] = imx_clk_hw_gate("sys1_pll_266m_cg", "sys1_pll_out", base + 0x30, 21);
 	hws[IMX8MQ_SYS1_PLL_400M_CG] = imx_clk_hw_gate("sys1_pll_400m_cg", "sys1_pll_out", base + 0x30, 23);
 	hws[IMX8MQ_SYS1_PLL_800M_CG] = imx_clk_hw_gate("sys1_pll_800m_cg", "sys1_pll_out", base + 0x30, 25);
 
@@ -382,7 +381,7 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
 	hws[IMX8MQ_SYS1_PLL_133M] = imx_clk_hw_fixed_factor("sys1_pll_133m", "sys1_pll_133m_cg", 1, 6);
 	hws[IMX8MQ_SYS1_PLL_160M] = imx_clk_hw_fixed_factor("sys1_pll_160m", "sys1_pll_160m_cg", 1, 5);
 	hws[IMX8MQ_SYS1_PLL_200M] = imx_clk_hw_fixed_factor("sys1_pll_200m", "sys1_pll_200m_cg", 1, 4);
-	hws[IMX8MQ_SYS1_PLL_266M] = imx_clk_hw_fixed_factor("sys1_pll_266m", "sys1_pll_266m_cg", 1, 3);
+	hws[IMX8MQ_SYS1_PLL_266M] = imx_clk_hw_fixed_factor("sys1_pll_266m", "sys1_pll_out", 1, 3);
 	hws[IMX8MQ_SYS1_PLL_400M] = imx_clk_hw_fixed_factor("sys1_pll_400m", "sys1_pll_400m_cg", 1, 2);
 	hws[IMX8MQ_SYS1_PLL_800M] = imx_clk_hw_fixed_factor("sys1_pll_800m", "sys1_pll_800m_cg", 1, 1);
 
-- 
2.29.2


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