Currently the CPU frequency is incorrectly reported:
CPU: NXP i.MX8QXP RevB A35 at 147228 MHz
Fix this problem by using a direct call to the SCU firmware to
retrieve the Cortex A35 CPU frequency.
With this change applied the CPU frequency is displayed correctly:
CPU: NXP i.MX8QXP RevB A35 at 1200 MHz
Tested-by: Marcelo Macedo <marcelo.mac...@nxp.com>
Signed-off-by: Fabio Estevam <feste...@gmail.com>
---
arch/arm/mach-imx/imx8/cpu.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
index 7539e45652..4bbc956f9d 100644
--- a/arch/arm/mach-imx/imx8/cpu.c
+++ b/arch/arm/mach-imx/imx8/cpu.c
@@ -616,26 +616,32 @@ static const struct udevice_id cpu_imx8_ids[] = {
{ }
};
+static ulong imx8_get_cpu_rate(void)
+{
+ ulong rate;
+ int ret;
+
+ ret = sc_pm_get_clock_rate(-1, SC_R_A35, SC_PM_CLK_CPU,
+ (sc_pm_clock_rate_t *)&rate);
+ if (ret) {
+ printf("Could not read CPU frequency: %d\n", ret);
+ return 0;
+ }
+
+ return rate;
+}
+
static int imx8_cpu_probe(struct udevice *dev)
{
struct cpu_imx_platdata *plat = dev_get_platdata(dev);
- struct clk cpu_clk;
u32 cpurev;
- int ret;
cpurev = get_cpu_rev();
plat->cpurev = cpurev;
plat->name = get_core_name();
plat->rev = get_imx8_rev(cpurev & 0xFFF);
plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);
-
- ret = clk_get_by_index(dev, 0, &cpu_clk);
- if (ret) {
- debug("%s: Failed to get CPU clk: %d\n", __func__, ret);
- return 0;
- }
-
- plat->freq_mhz = clk_get_rate(&cpu_clk) / 1000000;
+ plat->freq_mhz = imx8_get_cpu_rate() / 1000000;
return 0;
}
--
2.17.1
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