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imx8qxp: Fix the reported CPU frequency
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.macedo@nxp.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> Tested-by: Andrejs Cainikovs <andrejs.cainikovs@netmodule.com>
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1 changed files with 16 additions and 10 deletions
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@ -616,26 +616,32 @@ static const struct udevice_id cpu_imx8_ids[] = {
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{ }
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{ }
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};
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};
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static ulong imx8_get_cpu_rate(void)
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{
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ulong rate;
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int ret;
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ret = sc_pm_get_clock_rate(-1, SC_R_A35, SC_PM_CLK_CPU,
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(sc_pm_clock_rate_t *)&rate);
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if (ret) {
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printf("Could not read CPU frequency: %d\n", ret);
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return 0;
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}
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return rate;
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}
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static int imx8_cpu_probe(struct udevice *dev)
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static int imx8_cpu_probe(struct udevice *dev)
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{
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{
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struct cpu_imx_platdata *plat = dev_get_platdata(dev);
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struct cpu_imx_platdata *plat = dev_get_platdata(dev);
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struct clk cpu_clk;
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u32 cpurev;
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u32 cpurev;
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int ret;
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cpurev = get_cpu_rev();
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cpurev = get_cpu_rev();
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plat->cpurev = cpurev;
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plat->cpurev = cpurev;
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plat->name = get_core_name();
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plat->name = get_core_name();
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plat->rev = get_imx8_rev(cpurev & 0xFFF);
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plat->rev = get_imx8_rev(cpurev & 0xFFF);
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plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);
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plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);
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plat->freq_mhz = imx8_get_cpu_rate() / 1000000;
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ret = clk_get_by_index(dev, 0, &cpu_clk);
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if (ret) {
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debug("%s: Failed to get CPU clk: %d\n", __func__, ret);
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return 0;
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}
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plat->freq_mhz = clk_get_rate(&cpu_clk) / 1000000;
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return 0;
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return 0;
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}
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}
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