This patch ensures minimal cooling for the net2big_v2 by automatically starting the I2C fan (GMT G762) at low speed (2800 RPM).
Signed-off-by: Simon Guinot simon.guinot@sequanux.org Acked-by: Prafulla Wadaskar prafulla@marvell.com --- board/LaCie/net2big_v2/net2big_v2.c | 54 ++++++++++++++++++++++++++++++++++- board/LaCie/net2big_v2/net2big_v2.h | 5 ++++ include/configs/lacie_kw.h | 9 +++++- 3 files changed, 66 insertions(+), 2 deletions(-)
Changes in v2: - Add Prafulla's Acked-by
diff --git a/board/LaCie/net2big_v2/net2big_v2.c b/board/LaCie/net2big_v2/net2big_v2.c index e524f35..6cca4fb 100644 --- a/board/LaCie/net2big_v2/net2big_v2.c +++ b/board/LaCie/net2big_v2/net2big_v2.c @@ -22,6 +22,7 @@
#include <common.h> #include <command.h> +#include <i2c.h> #include <asm/arch/cpu.h> #include <asm/arch/kirkwood.h> #include <asm/arch/mpp.h> @@ -92,8 +93,59 @@ int board_init(void) }
#if defined(CONFIG_MISC_INIT_R) + +#if defined(CONFIG_CMD_I2C) && defined(CONFIG_SYS_I2C_G762_ADDR) +/* + * Start I2C fan (GMT G762 controller) + */ +static void init_fan(void) +{ + u8 data; + + i2c_set_bus_num(0); + + /* Enable open-loop and PWM modes */ + data = 0x20; + if (i2c_write(CONFIG_SYS_I2C_G762_ADDR, + G762_REG_FAN_CMD1, 1, &data, 1) != 0) + goto err; + data = 0; + if (i2c_write(CONFIG_SYS_I2C_G762_ADDR, + G762_REG_SET_CNT, 1, &data, 1) != 0) + goto err; + /* + * RPM to PWM (set_out register) fan speed conversion array: + * 0 0x00 + * 1500 0x04 + * 2800 0x08 + * 3400 0x0C + * 3700 0x10 + * 4400 0x20 + * 4700 0x30 + * 4800 0x50 + * 5200 0x80 + * 5400 0xC0 + * 5500 0xFF + * + * Start fan at low speed (2800 RPM): + */ + data = 0x08; + if (i2c_write(CONFIG_SYS_I2C_G762_ADDR, + G762_REG_SET_OUT, 1, &data, 1) != 0) + goto err; + + return; +err: + printf("Error: failed to start I2C fan @%02x\n", + CONFIG_SYS_I2C_G762_ADDR); +} +#else +static void init_fan(void) {} +#endif /* CONFIG_CMD_I2C && CONFIG_SYS_I2C_G762_ADDR */ + int misc_init_r(void) { + init_fan(); #if defined(CONFIG_CMD_I2C) && defined(CONFIG_SYS_I2C_EEPROM_ADDR) if (!getenv("ethaddr")) { uchar mac[6]; @@ -103,7 +155,7 @@ int misc_init_r(void) #endif return 0; } -#endif +#endif /* CONFIG_MISC_INIT_R */
#if defined(CONFIG_CMD_NET) && defined(CONFIG_RESET_PHY_R) /* Configure and initialize PHY */ diff --git a/board/LaCie/net2big_v2/net2big_v2.h b/board/LaCie/net2big_v2/net2big_v2.h index f9778f4..83537d6 100644 --- a/board/LaCie/net2big_v2/net2big_v2.h +++ b/board/LaCie/net2big_v2/net2big_v2.h @@ -32,4 +32,9 @@ /* Buttons */ #define NET2BIG_V2_GPIO_PUSH_BUTTON 34
+/* GMT G762 registers (I2C fan controller) */ +#define G762_REG_SET_CNT 0x00 +#define G762_REG_SET_OUT 0x03 +#define G762_REG_FAN_CMD1 0x04 + #endif /* NET2BIG_V2_H */ diff --git a/include/configs/lacie_kw.h b/include/configs/lacie_kw.h index 09b5798..e2b3b21 100644 --- a/include/configs/lacie_kw.h +++ b/include/configs/lacie_kw.h @@ -120,10 +120,14 @@ #endif
/* + * Enable platform initialisation via misc_init_r() function + */ +#define CONFIG_MISC_INIT_R + +/* * Ethernet Driver configuration */ #ifdef CONFIG_CMD_NET -#define CONFIG_MISC_INIT_R /* Call misc_init_r() to initialize MAC address */ #define CONFIG_MVGBE_PORTS {1, 0} /* enable port 0 only */ #define CONFIG_NETCONSOLE #endif @@ -153,6 +157,9 @@ #define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 #define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 4 /* 16-byte page size */ #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1 /* 8-bit device address */ +#if defined(CONFIG_NET2BIG_V2) +#define CONFIG_SYS_I2C_G762_ADDR 0x3e +#endif #endif /* CONFIG_CMD_I2C */
/*