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| author | Ye Li <ye.li@nxp.com> | 2024-06-07 21:33:35 +0800 |
|---|---|---|
| committer | Abel Vesa <abel.vesa@linaro.org> | 2024-06-21 09:35:21 +0300 |
| commit | 4717ccadb51e2630790dddd222830702de17f090 (patch) | |
| tree | 0f9c2ebbcc0a302e692967f69e077c1abd1826cb /drivers/clk/imx/clk-composite-7ulp.c | |
| parent | d342df11726bfac9c3a9d2037afa508ac0e9e44e (diff) | |
| download | linux-4717ccadb51e2630790dddd222830702de17f090.tar.gz linux-4717ccadb51e2630790dddd222830702de17f090.tar.bz2 linux-4717ccadb51e2630790dddd222830702de17f090.zip | |
clk: imx: composite-7ulp: Check the PCC present bit
When some module is disabled by fuse, its PCC PR bit is default 0 and
PCC is not operational. Any write to this PCC will cause SError.
Fixes: b40ba8065347 ("clk: imx: Update the compsite driver to support imx8ulp")
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240607133347.3291040-4-peng.fan@oss.nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Diffstat (limited to 'drivers/clk/imx/clk-composite-7ulp.c')
| -rw-r--r-- | drivers/clk/imx/clk-composite-7ulp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-composite-7ulp.c b/drivers/clk/imx/clk-composite-7ulp.c index e208ddc51133..db7f40b07d1a 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 +79,12 @@ 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)) { + pr_info("PCC PR is 0 for clk:%s, bypass\n", name); + return 0; + } + if (mux_present) { mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux) |