diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2015-09-09 23:20:27 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-09-16 19:53:53 -0600 |
| commit | 554778c240385b09dc01140865fe3f5d04806456 (patch) | |
| tree | 29a2a344f00b40a7aca4c7e1d7e8e938fb2f8949 /arch/x86/cpu/quark | |
| parent | 693b5f6c71c870276f5c370254fafcb10ee43cb1 (diff) | |
| download | u-boot-554778c240385b09dc01140865fe3f5d04806456.tar.gz | |
x86: quark: Initialize thermal sensor properly
Thermal sensor on Quark SoC needs to be properly initialized per
Quark firmware writer guide, otherwise when booting Linux kernel,
it triggers system shutdown because of wrong temperature in the
thermal sensor is detected by the kernel driver (see below):
[ 5.119819] thermal_sys: Critical temperature reached(206 C),shutting down
[ 5.128997] Failed to start orderly shutdown: forcing the issue
[ 5.135495] Emergency Sync complete
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/quark')
| -rw-r--r-- | arch/x86/cpu/quark/quark.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c index 3ddf07926a..8b78a867ef 100644 --- a/arch/x86/cpu/quark/quark.c +++ b/arch/x86/cpu/quark/quark.c @@ -134,6 +134,43 @@ static void quark_usb_early_init(void) msg_port_alt_setbits(MSG_PORT_USB_AFE, USB2_PLL2, 1 << 24); } +static void quark_thermal_early_init(void) +{ + /* The sequence below comes from Quark firmware writer guide */ + + /* thermal sensor mode config */ + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG1, + (1 << 3) | (1 << 4) | (1 << 5), 1 << 5); + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG1, + (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) | + (1 << 12), 1 << 9); + msg_port_alt_setbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 14); + msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 17); + msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG1, 1 << 18); + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG2, 0xffff, 0x011f); + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG3, 0xff, 0x17); + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG3, + (1 << 8) | (1 << 9), 1 << 8); + msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG3, 0xff000000); + msg_port_alt_clrsetbits(MSG_PORT_SOC_UNIT, TS_CFG4, + 0x7ff800, 0xc8 << 11); + + /* thermal monitor catastrophic trip set point (105 celsius) */ + msg_port_clrsetbits(MSG_PORT_RMU, TS_TRIP, 0xff, 155); + + /* thermal monitor catastrophic trip clear point (0 celsius) */ + msg_port_clrsetbits(MSG_PORT_RMU, TS_TRIP, 0xff0000, 50 << 16); + + /* take thermal sensor out of reset */ + msg_port_alt_clrbits(MSG_PORT_SOC_UNIT, TS_CFG4, 1 << 0); + + /* enable thermal monitor */ + msg_port_setbits(MSG_PORT_RMU, TS_MODE, 1 << 15); + + /* lock all thermal configuration */ + msg_port_setbits(MSG_PORT_RMU, RMU_CTRL, (1 << 5) | (1 << 6)); +} + static void quark_enable_legacy_seg(void) { msg_port_setbits(MSG_PORT_HOST_BRIDGE, HMISC2, @@ -173,6 +210,9 @@ int arch_cpu_init(void) /* Initialize USB2 PHY */ quark_usb_early_init(); + /* Initialize thermal sensor */ + quark_thermal_early_init(); + /* Turn on legacy segments (A/B/E/F) decode to system RAM */ quark_enable_legacy_seg(); |