Messages in this thread Patch in this message | | | From | Rob Herring <> | Date | Mon, 27 Mar 2023 13:43:19 -0500 | Subject | [PATCH 2/3] clk: mvebu: Use of_get_cpu_hwid() to read CPU ID |
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Use of_get_cpu_hwid() rather than the open coded reading of the CPU nodes "reg" property. The existing code is in fact wrong as the "reg" address cells size is 2 cells for arm64. The existing code happens to work because the DTS files are wrong as well.
Signed-off-by: Rob Herring <robh@kernel.org> --- Note this should be marked for stable so that if/when the DTS files are fixed, then at least stable kernels will work. This is untested, so I didn't mark for stable. --- drivers/clk/mvebu/ap-cpu-clk.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/clk/mvebu/ap-cpu-clk.c b/drivers/clk/mvebu/ap-cpu-clk.c index 71bdd7c3ff03..d8a7a4c90d54 100644 --- a/drivers/clk/mvebu/ap-cpu-clk.c +++ b/drivers/clk/mvebu/ap-cpu-clk.c @@ -253,12 +253,12 @@ static int ap_cpu_clock_probe(struct platform_device *pdev) */ nclusters = 1; for_each_of_cpu_node(dn) { - int cpu, err; + u64 cpu; - err = of_property_read_u32(dn, "reg", &cpu); - if (WARN_ON(err)) { + cpu = of_get_cpu_hwid(dn, 0); + if (WARN_ON(cpu == OF_BAD_ADDR)) { of_node_put(dn); - return err; + return -EINVAL; } /* If cpu2 or cpu3 is enabled */ @@ -288,12 +288,12 @@ static int ap_cpu_clock_probe(struct platform_device *pdev) struct clk_init_data init; const char *parent_name; struct clk *parent; - int cpu, err; + u64 cpu; - err = of_property_read_u32(dn, "reg", &cpu); - if (WARN_ON(err)) { + cpu = of_get_cpu_hwid(dn, 0); + if (WARN_ON(cpu == OF_BAD_ADDR)) { of_node_put(dn); - return err; + return -EINVAL; } cluster_index = cpu & APN806_CLUSTER_NUM_MASK; -- 2.39.2
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