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From 07f84ed283b913cbdf87181ae2ed65467d923df5 Mon Sep 17 00:00:00 2001
From: Vincent Chen <vincent.chen@sifive.com>
Date: Mon, 24 Jan 2022 02:57:40 -0800
Subject: [PATCH 2/2] board: sifive: spl: Set remote thermal of TMP451 to 85
deg C for the unmatched board
For TMP451 on the unmatched board, the default value of the remote
thermal threshold is 108 deg C. This commit initilizes it to 85 deg C at SPL.
---
board/sifive/unmatched/spl.c | 29 +++++++++++++++++++++++++++++
drivers/misc/Kconfig | 10 ++++++++++
include/configs/sifive-unmatched.h | 4 ++++
scripts/config_whitelist.txt | 1 +
4 files changed, 44 insertions(+)
--- a/board/sifive/unmatched/spl.c
+++ b/board/sifive/unmatched/spl.c
@@ -10,6 +10,8 @@
#include <spl.h>
#include <misc.h>
#include <log.h>
+#include <config.h>
+#include <i2c.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/gpio.h>
@@ -26,6 +28,27 @@
#define MODE_SELECT_SD 0xb
#define MODE_SELECT_MASK GENMASK(3, 0)
+#define TMP451_REMOTE_THERM_LIMIT_REG_OFFSET 0x19
+#define TMP451_REMOTE_THERM_LIMIT_INIT_VALUE 0x55
+
+static inline int init_tmp451_remote_therm_limit(void)
+{
+ struct udevice *dev;
+ unsigned char r_therm_limit = TMP451_REMOTE_THERM_LIMIT_INIT_VALUE;
+ int ret;
+
+ ret = i2c_get_chip_for_busnum(CONFIG_SYS_TMP451_BUS_NUM,
+ CONFIG_SYS_I2C_TMP451_ADDR,
+ CONFIG_SYS_I2C_TMP451_ADDR_LEN,
+ &dev);
+
+ if (!ret)
+ ret = dm_i2c_write(dev, TMP451_REMOTE_THERM_LIMIT_REG_OFFSET,
+ &r_therm_limit,
+ sizeof(unsigned char));
+ return ret;
+}
+
static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
{
int ret;
@@ -92,6 +115,12 @@ int spl_board_init_f(void)
pwm_device_init();
+ ret = init_tmp451_remote_therm_limit();
+ if (ret) {
+ debug("TMP451 remote THERM limit init failed: %d\n", ret);
+ goto end;
+ }
+
ret = spl_gemgxl_init();
if (ret) {
debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -536,8 +536,18 @@ config SYS_I2C_EEPROM_ADDR
depends on ID_EEPROM || I2C_EEPROM || SPL_I2C_EEPROM || CMD_EEPROM || ENV_IS_IN_EEPROM
default 0
+config SYS_I2C_TMP451_ADDR
+ hex "Chip address of the TMP451 device"
+ default 0
+
if I2C_EEPROM
+config SYS_I2C_TMP451_ADDR_LEN
+ int "Length in bytes of the TMP451 memory array address"
+ default 1
+ help
+ Note: This is NOT the chip address length!
+
config SYS_I2C_EEPROM_ADDR_OVERFLOW
hex "EEPROM Address Overflow"
default 0x0
--- a/include/configs/sifive-unmatched.h
+++ b/include/configs/sifive-unmatched.h
@@ -15,6 +15,10 @@
#define CONFIG_STANDALONE_LOAD_ADDR 0x80200000
+#define CONFIG_SYS_TMP451_BUS_NUM 0
+#define CONFIG_SYS_I2C_TMP451_ADDR 0x4c
+#define CONFIG_SYS_I2C_TMP451_ADDR_LEN 0x1
+
/* Environment options */
#define BOOT_TARGET_DEVICES(func) \
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -1268,6 +1268,7 @@ CONFIG_SYS_TIMER_BASE
CONFIG_SYS_TIMER_COUNTER
CONFIG_SYS_TIMER_COUNTS_DOWN
CONFIG_SYS_TIMER_RATE
+CONFIG_SYS_TMP451_BUS_NUM
CONFIG_SYS_TMPVIRT
CONFIG_SYS_TSEC1_OFFSET
CONFIG_SYS_TX_ETH_BUFFER
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