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Sat, 4 May 2024 00:41:18 +0000 From: "Peng Fan (OSS)" Date: Sat, 04 May 2024 08:48:56 +0800 Subject: [PATCH 03/18] clk: imx: composite-7ulp: Check the PCC present bit Message-Id: <20240504-imx-clk-v1-3-f7915489d58d@nxp.com> References: <20240504-imx-clk-v1-0-f7915489d58d@nxp.com> In-Reply-To: <20240504-imx-clk-v1-0-f7915489d58d@nxp.com> To: Abel Vesa , Michael Turquette , Stephen Boyd , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Jacky Bai , Ye Li , Dong Aisheng Cc: linux-clk@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Abel Vesa , Peng Fan X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1714783747; l=1147; i=peng.fan@nxp.com; s=20230812; h=from:subject:message-id; bh=/EJNZA8jzAtJukHgOj2MT46tK7VZuwWKGrAynGdc6BY=; b=v21z0ZYsAPEAg8oXVf0AFWhYjB7qV1FmF/vTgvU6W7PnYD6JYU+/Ppjyes/fcKEHKD6cxOnNX vAlOSj5j3FzCth6Z+UOmmVZNbAkPR/VhJ+blpuAaiZPGMLjDjCdoeri X-Developer-Key: i=peng.fan@nxp.com; a=ed25519; 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Any write to this PCC will cause SError. Fixes: b40ba8065347 ("clk: imx: Update the compsite driver to support imx8ulp") Reviewed-by: Peng Fan Signed-off-by: Ye Li Signed-off-by: Peng Fan --- drivers/clk/imx/clk-composite-7ulp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/clk/imx/clk-composite-7ulp.c b/drivers/clk/imx/clk-composite-7ulp.c index e208ddc51133..e70a03e7299c 100644 --- a/drivers/clk/imx/clk-composite-7ulp.c +++ b/drivers/clk/imx/clk-composite-7ulp.c @@ -14,6 +14,7 @@ #include "../clk-fractional-divider.h" #include "clk.h" +#define PCG_PR_MASK BIT(31) #define PCG_PCS_SHIFT 24 #define PCG_PCS_MASK 0x7 #define PCG_CGC_SHIFT 30 @@ -78,6 +79,10 @@ static struct clk_hw *imx_ulp_clk_hw_composite(const char *name, struct clk_hw *hw; u32 val; + val = readl(reg); + if (!(val & PCG_PR_MASK)) + return ERR_PTR(-ENODEV); + if (mux_present) { mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux)