124 lines
3.5 KiB
Diff
124 lines
3.5 KiB
Diff
From e1dcf7e7a3b5c0e76171ba0b7145af12693adcc4 Mon Sep 17 00:00:00 2001
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From: Vincent Chen <vincent.chen@sifive.com>
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Date: Wed, 3 May 2023 07:46:41 +0000
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Subject: [PATCH 3/3] board: sifive: spl: Set remote thermal of TMP451 to 85
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deg C for the unmatched board
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For TMP451 on the unmatched board, the default value of the remote
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thermal threshold is 108 deg C. This commit initilizes it to 85 deg C at SPL.
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---
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board/sifive/unmatched/spl.c | 29 +++++++++++++++++++++++++++++
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configs/sifive_unmatched_defconfig | 3 +++
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drivers/misc/Kconfig | 14 ++++++++++++++
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include/configs/sifive-unmatched.h | 4 ++++
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4 files changed, 50 insertions(+)
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diff --git a/board/sifive/unmatched/spl.c b/board/sifive/unmatched/spl.c
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index f3a661a8..05ba5916 100644
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--- a/board/sifive/unmatched/spl.c
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+++ b/board/sifive/unmatched/spl.c
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@@ -10,6 +10,8 @@
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#include <spl.h>
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#include <misc.h>
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#include <log.h>
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+#include <config.h>
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+#include <i2c.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <asm/gpio.h>
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@@ -26,6 +28,27 @@
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#define MODE_SELECT_SD 0xb
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#define MODE_SELECT_MASK GENMASK(3, 0)
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+#define TMP451_REMOTE_THERM_LIMIT_REG_OFFSET 0x19
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+#define TMP451_REMOTE_THERM_LIMIT_INIT_VALUE 0x55
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+
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+static inline int init_tmp451_remote_therm_limit(void)
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+{
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+ struct udevice *dev;
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+ unsigned char r_therm_limit = TMP451_REMOTE_THERM_LIMIT_INIT_VALUE;
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+ int ret;
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+
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+ ret = i2c_get_chip_for_busnum(CONFIG_SYS_TMP451_BUS_NUM,
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+ CONFIG_SYS_I2C_TMP451_ADDR,
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+ CONFIG_SYS_I2C_TMP451_ADDR_LEN,
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+ &dev);
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+
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+ if (!ret)
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+ ret = dm_i2c_write(dev, TMP451_REMOTE_THERM_LIMIT_REG_OFFSET,
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+ &r_therm_limit,
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+ sizeof(unsigned char));
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+ return ret;
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+}
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+
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static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
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{
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int ret;
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@@ -92,6 +115,12 @@ int spl_board_init_f(void)
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pwm_device_init();
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+ ret = init_tmp451_remote_therm_limit();
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+ if (ret) {
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+ debug("TMP451 remote THERM limit init failed: %d\n", ret);
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+ goto end;
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+ }
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+
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ret = spl_gemgxl_init();
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if (ret) {
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debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
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diff --git a/configs/sifive_unmatched_defconfig b/configs/sifive_unmatched_defconfig
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index 74cdb4ea..e843378c 100644
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--- a/configs/sifive_unmatched_defconfig
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+++ b/configs/sifive_unmatched_defconfig
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@@ -68,3 +68,6 @@ CONFIG_SYSRESET=y
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CONFIG_SYSRESET_SBI=y
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CONFIG_CMD_POWEROFF=y
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CONFIG_SYSRESET_CMD_POWEROFF=y
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+CONFIG_SYS_TMP451_BUS_NUM=0
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+CONFIG_SYS_I2C_TMP451_ADDR=0x4c
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+CONFIG_SYS_I2C_TMP451_ADDR_LEN=1
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diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
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index b5707a15..8ea6f014 100644
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--- a/drivers/misc/Kconfig
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+++ b/drivers/misc/Kconfig
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@@ -552,6 +552,20 @@ config SYS_I2C_EEPROM_ADDR
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if I2C_EEPROM
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+config SYS_TMP451_BUS_NUM
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+ int "Bus number of TMP451 device"
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+ default 0
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+
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+config SYS_I2C_TMP451_ADDR
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+ hex "Chip address of the TMP451 device"
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+ default 0
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+
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+config SYS_I2C_TMP451_ADDR_LEN
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+ int "Length in bytes of the TMP451 memory array address"
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+ default 1
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+ help
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+ Note: This is NOT the chip address length!
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+
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config SYS_I2C_EEPROM_ADDR_OVERFLOW
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hex "EEPROM Address Overflow"
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default 0x0
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diff --git a/include/configs/sifive-unmatched.h b/include/configs/sifive-unmatched.h
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index 74150b7d..6a8eb1e6 100644
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--- a/include/configs/sifive-unmatched.h
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+++ b/include/configs/sifive-unmatched.h
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@@ -13,6 +13,10 @@
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#define CFG_SYS_SDRAM_BASE 0x80000000
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+#define CONFIG_SYS_TMP451_BUS_NUM 0
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+#define CONFIG_SYS_I2C_TMP451_ADDR 0x4c
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+#define CONFIG_SYS_I2C_TMP451_ADDR_LEN 0x1
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+
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/* Environment options */
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#define BOOT_TARGET_DEVICES(func) \
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--
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2.40.1
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