From: Ying Zhang ying.zhang22455@nxp.com
Fan settings(PWM signal set to ~50% duty cycle for all three rear) fans provide good thermal air flow with considerable reduction of fan noise.
Signed-off-by: Ying Zhang ying.zhang22455@nxp.com --- board/freescale/ls2080ardb/ls2080ardb.c | 31 +++++++++++++++++++++++++++++++ include/configs/ls2080ardb.h | 6 ++++++ 2 files changed, 37 insertions(+)
diff --git a/board/freescale/ls2080ardb/ls2080ardb.c b/board/freescale/ls2080ardb/ls2080ardb.c index 83d9e7e..1703b96 100644 --- a/board/freescale/ls2080ardb/ls2080ardb.c +++ b/board/freescale/ls2080ardb/ls2080ardb.c @@ -151,6 +151,36 @@ int config_board_mux(int ctrl_type) return 0; }
+void set_fan_speed(void) +{ + int ret, i; + u8 value; + + select_i2c_ch_pca9547(I2C_MUX_CH_FAN); + value = 0x80; + ret = i2c_write(I2C_FAN_CONTROLLER_ADDR, 0x0, 1, &value, 1); + if (ret) { + printf("Fan: Failed to set fan speed\n"); + return; + } + value = 1; + ret = i2c_write(I2C_FAN_CONTROLLER_ADDR, 0x58, 1, &value, 1); + if (ret) { + printf("Fan: Failed to set fan speed\n"); + return; + } + + /* set PWM = ~50% DCyc for all rear PWM fans */ + value = 0x20; + for (i = 0xb4; i < 0xb9; i++) { + ret = i2c_write(I2C_FAN_CONTROLLER_ADDR, i, 1, &value, 1); + if (ret) { + printf("Fan: Failed to set fan speed\n"); + return; + } + } +} + int board_init(void) { char *env_hwconfig; @@ -175,6 +205,7 @@ int board_init(void) #ifdef CONFIG_ENV_IS_NOWHERE gd->env_addr = (ulong)&default_environment[0]; #endif + set_fan_speed(); select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
QIXIS_WRITE(rst_ctl, QIXIS_RST_CTL_RESET_EN); diff --git a/include/configs/ls2080ardb.h b/include/configs/ls2080ardb.h index b9cb6d3..05f98c0 100644 --- a/include/configs/ls2080ardb.h +++ b/include/configs/ls2080ardb.h @@ -264,6 +264,7 @@ unsigned long get_board_sys_clk(void);
/* I2C bus multiplexer */ #define I2C_MUX_CH_DEFAULT 0x8 +#define I2C_MUX_CH_FAN 0xd
/* SPI */ #ifdef CONFIG_FSL_DSPI @@ -279,6 +280,11 @@ unsigned long get_board_sys_clk(void); #define CONFIG_SYS_I2C_RTC_ADDR 0x68 #define CONFIG_CMD_DATE
+/* + * Winbond fan controller + */ +#define I2C_FAN_CONTROLLER_ADDR 0x2c + /* EEPROM */ #define CONFIG_ID_EEPROM #define CONFIG_CMD_EEPROM