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mx6: thermal: Check cpu temperature via thermal sensor

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Add imx6 thermal device to mx6 soc file. Read the cpu temperature
using this device to access onchip thermal sensor.

Signed-off-by: Ye.Li <B37916@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
This commit is contained in:
Ye.Li 2014-11-20 21:14:14 +08:00 committed by Stefano Babic
parent e3568d2eca
commit 7a26416847
2 changed files with 36 additions and 0 deletions
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15
arch/arm/cpu/armv7/mx6/soc.c
View file

@ -22,6 +22,8 @@
#include <asm/arch/mxc_hdmi.h>
#include <asm/arch/crm_regs.h>
#include <asm/bootm.h>
#include <dm.h>
#include <imx_thermal.h>
enum ldo_reg {
LDO_ARM,
@ -37,6 +39,19 @@ struct scu_regs {
u32 fpga_rev;
};
#if defined(CONFIG_IMX6_THERMAL)
static const struct imx_thermal_plat imx6_thermal_plat = {
.regs = (void *)ANATOP_BASE_ADDR,
.fuse_bank = 1,
.fuse_word = 6,
};
U_BOOT_DEVICE(imx6_thermal) = {
.name = "imx_thermal",
.platdata = &imx6_thermal_plat,
};
#endif
u32 get_nr_cpus(void)
{
struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;

21
arch/arm/imx-common/cpu.c
View file

@ -17,6 +17,7 @@
#include <asm/arch/sys_proto.h>
#include <asm/arch/crm_regs.h>
#include <ipu_pixfmt.h>
#include <thermal.h>
#ifdef CONFIG_FSL_ESDHC
#include <fsl_esdhc.h>
@ -134,6 +135,11 @@ int print_cpuinfo(void)
{
u32 cpurev;
#if defined(CONFIG_MX6) && defined(CONFIG_IMX6_THERMAL)
struct udevice *thermal_dev;
int cpu_tmp, ret;
#endif
cpurev = get_cpu_rev();
printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
@ -141,6 +147,21 @@ int print_cpuinfo(void)
(cpurev & 0x000F0) >> 4,
(cpurev & 0x0000F) >> 0,
mxc_get_clock(MXC_ARM_CLK) / 1000000);
#if defined(CONFIG_MX6) && defined(CONFIG_IMX6_THERMAL)
ret = uclass_get_device(UCLASS_THERMAL, 0, &thermal_dev);
if (!ret) {
ret = thermal_get_temp(thermal_dev, &cpu_tmp);
if (!ret)
printf("CPU: Temperature %d C\n", cpu_tmp);
else
printf("CPU: Temperature: invalid sensor data\n");
} else {
printf("CPU: Temperature: Can't find sensor device\n");
}
#endif
printf("Reset cause: %s\n", get_reset_cause());
return 0;
}