121 lines
3.4 KiB
Diff
121 lines
3.4 KiB
Diff
From c920399ac5a2bd0d770b1f6833843b7abeb641e7 Mon Sep 17 00:00:00 2001
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From: Vincent Chen <vincent.chen@sifive.com>
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Date: Mon, 24 Jan 2022 02:57:40 -0800
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Subject: [PATCH 6/6] 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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drivers/misc/Kconfig | 10 ++++++++++
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include/configs/sifive-unmatched.h | 4 ++++
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scripts/config_whitelist.txt | 1 +
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4 files changed, 44 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/drivers/misc/Kconfig b/drivers/misc/Kconfig
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index 85ae7f62..38229cdf 100644
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--- a/drivers/misc/Kconfig
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+++ b/drivers/misc/Kconfig
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@@ -463,6 +463,16 @@ config SYS_I2C_EEPROM_ADDR
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if I2C_EEPROM
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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 e62ad6ac..718108a3 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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@@ -32,6 +32,10 @@
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#define CONFIG_STANDALONE_LOAD_ADDR 0x80200000
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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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#ifndef CONFIG_SPL_BUILD
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diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
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index cecdda67..378faa09 100644
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--- a/scripts/config_whitelist.txt
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+++ b/scripts/config_whitelist.txt
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@@ -1671,6 +1671,7 @@ CONFIG_SYS_TIMER_BASE
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CONFIG_SYS_TIMER_COUNTER
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CONFIG_SYS_TIMER_COUNTS_DOWN
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CONFIG_SYS_TIMER_RATE
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+CONFIG_SYS_TMP451_BUS_NUM
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CONFIG_SYS_TMPVIRT
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CONFIG_SYS_TSEC1_OFFSET
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CONFIG_SYS_TSEC2_OFFSET
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--
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2.36.1
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