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| author | Simon Guinot <simon.guinot@sequanux.org> | 2013-06-18 15:14:48 +0200 |
|---|---|---|
| committer | Prafulla Wadaskar <prafulla@marvell.com> | 2013-06-20 14:01:23 +0530 |
| commit | 2af4d0f49f80a52d50191f0ec451944b1853113e (patch) | |
| tree | 7fe8fdfaf244cd4830d647a76ab16989446331d8 /board/LaCie/net2big_v2 | |
| parent | c2543a21df335484fa86bd652b5564d0ca90d5f6 (diff) | |
| download | u-boot-imx-2af4d0f49f80a52d50191f0ec451944b1853113e.zip u-boot-imx-2af4d0f49f80a52d50191f0ec451944b1853113e.tar.gz u-boot-imx-2af4d0f49f80a52d50191f0ec451944b1853113e.tar.bz2 | |
net2big_v2: initialize I2C fan at startup
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>
Diffstat (limited to 'board/LaCie/net2big_v2')
| -rw-r--r-- | board/LaCie/net2big_v2/net2big_v2.c | 54 | ||||
| -rw-r--r-- | board/LaCie/net2big_v2/net2big_v2.h | 5 |
2 files changed, 58 insertions, 1 deletions
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 */ |