From 74e8fb03bdafd096bcfaa36268376874dfb5c7d4 Mon Sep 17 00:00:00 2001 From: Anatolij Gustschin Date: Wed, 20 May 2020 01:31:44 +0200 Subject: [PATCH] cpu: imx8: use intended cpu-thermal device when getting temp value This fixes getting DT alert and critical pdata values in imx_scu_thermal driver. On i.MX8QXP using not initialized alert pdata value resulted in boot hang and endless loop outputting: CPU Temperature (47200C) has beyond alert (0C), close to critical (0C) waiting... While at it, preset CPU type values once to avoid multiple calls of device_is_compatible() for same property. Fixes: 3ee6ea443eb4 ("cpu: imx_cpu: Print the CPU temperature for iMX8QM A72") Signed-off-by: Anatolij Gustschin Reviewed-by: Peng Fan --- drivers/cpu/imx8_cpu.c | 50 +++++++++++++++++++++--------------------- 1 file changed, 25 insertions(+), 25 deletions(-) diff --git a/drivers/cpu/imx8_cpu.c b/drivers/cpu/imx8_cpu.c index 8b297b2b0f..6345cd0815 100644 --- a/drivers/cpu/imx8_cpu.c +++ b/drivers/cpu/imx8_cpu.c @@ -20,6 +20,7 @@ struct cpu_imx_platdata { const char *name; const char *rev; const char *type; + u32 cpu_rsrc; u32 cpurev; u32 freq_mhz; u32 mpidr; @@ -52,16 +53,23 @@ const char *get_imx8_rev(u32 rev) } } -const char *get_core_name(struct udevice *dev) +static void set_core_data(struct udevice *dev) { - if (device_is_compatible(dev, "arm,cortex-a35")) - return "A35"; - else if (device_is_compatible(dev, "arm,cortex-a53")) - return "A53"; - else if (device_is_compatible(dev, "arm,cortex-a72")) - return "A72"; - else - return "?"; + struct cpu_imx_platdata *plat = dev_get_platdata(dev); + + if (device_is_compatible(dev, "arm,cortex-a35")) { + plat->cpu_rsrc = SC_R_A35; + plat->name = "A35"; + } else if (device_is_compatible(dev, "arm,cortex-a53")) { + plat->cpu_rsrc = SC_R_A53; + plat->name = "A53"; + } else if (device_is_compatible(dev, "arm,cortex-a72")) { + plat->cpu_rsrc = SC_R_A72; + plat->name = "A72"; + } else { + plat->cpu_rsrc = SC_R_A53; + plat->name = "?"; + } } #if IS_ENABLED(CONFIG_IMX_SCU_THERMAL) @@ -69,12 +77,12 @@ static int cpu_imx_get_temp(struct cpu_imx_platdata *plat) { struct udevice *thermal_dev; int cpu_tmp, ret; + int idx = 1; /* use "cpu-thermal0" device */ - if (!strcmp(plat->name, "A72")) - ret = uclass_get_device(UCLASS_THERMAL, 1, &thermal_dev); - else - ret = uclass_get_device(UCLASS_THERMAL, 0, &thermal_dev); + if (plat->cpu_rsrc == SC_R_A72) + idx = 2; /* use "cpu-thermal1" device */ + ret = uclass_get_device(UCLASS_THERMAL, idx, &thermal_dev); if (!ret) { ret = thermal_get_temp(thermal_dev, &cpu_tmp); if (ret) @@ -182,19 +190,11 @@ static const struct udevice_id cpu_imx8_ids[] = { static ulong imx8_get_cpu_rate(struct udevice *dev) { + struct cpu_imx_platdata *plat = dev_get_platdata(dev); ulong rate; - int ret, type; - - if (device_is_compatible(dev, "arm,cortex-a35")) - type = SC_R_A35; - else if (device_is_compatible(dev, "arm,cortex-a53")) - type = SC_R_A53; - else if (device_is_compatible(dev, "arm,cortex-a72")) - type = SC_R_A72; - else - return 0; + int ret; - ret = sc_pm_get_clock_rate(-1, type, SC_PM_CLK_CPU, + ret = sc_pm_get_clock_rate(-1, plat->cpu_rsrc, SC_PM_CLK_CPU, (sc_pm_clock_rate_t *)&rate); if (ret) { printf("Could not read CPU frequency: %d\n", ret); @@ -209,9 +209,9 @@ static int imx8_cpu_probe(struct udevice *dev) struct cpu_imx_platdata *plat = dev_get_platdata(dev); u32 cpurev; + set_core_data(dev); cpurev = get_cpu_rev(); plat->cpurev = cpurev; - plat->name = get_core_name(dev); plat->rev = get_imx8_rev(cpurev & 0xFFF); plat->type = get_imx8_type((cpurev & 0xFF000) >> 12); plat->freq_mhz = imx8_get_cpu_rate(dev) / 1000000; -- 2.25.1