Exynos5: TMU: Add TMU init and status check

This adds call to tmu_init() and TMU boot time analysis
for the SoC temperature threshold breach.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index 0097b3fda774fa3cd24005b0a700b80f8e0ccb06..217c6df30185f14d6ba4797e65f3300fd6f3b4eb 100644 (file)
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -37,9 +37,39 @@
 #include <asm/arch/dp_info.h>
 #include <power/pmic.h>
 #include <power/max77686_pmic.h>
+#include <tmu.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined CONFIG_EXYNOS_TMU
+/*
+ * Boot Time Thermal Analysis for SoC temperature threshold breach
+ */
+static void boot_temp_check(void)
+{
+       int temp;
+
+       switch (tmu_monitor(&temp)) {
+       /* Status TRIPPED ans WARNING means corresponding threshold breach */
+       case TMU_STATUS_TRIPPED:
+               puts("EXYNOS_TMU: TRIPPING! Device power going down ...\n");
+               set_ps_hold_ctrl();
+               hang();
+               break;
+       case TMU_STATUS_WARNING:
+               puts("EXYNOS_TMU: WARNING! Temperature very high\n");
+               break;
+       /*
+        * TMU_STATUS_INIT means something is wrong with temperature sensing
+        * and TMU status was changed back from NORMAL to INIT.
+        */
+       case TMU_STATUS_INIT:
+       default:
+               debug("EXYNOS_TMU: Unknown TMU state\n");
+       }
+}
+#endif
+
 #ifdef CONFIG_USB_EHCI_EXYNOS
 int board_usb_vbus_init(void)
 {
@@ -71,6 +101,15 @@ static void  board_enable_audio_codec(void)
 int board_init(void)
 {
        gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL);
+
+#if defined CONFIG_EXYNOS_TMU
+       if (tmu_init(gd->fdt_blob) != TMU_STATUS_NORMAL) {
+               debug("%s: Failed to init TMU\n", __func__);
+               return -1;
+       }
+       boot_temp_check();
+#endif
+
 #ifdef CONFIG_EXYNOS_SPI
        spi_init();
 #endif