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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>
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parent
c2543a21df
commit
2af4d0f49f
3 changed files with 66 additions and 2 deletions
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@ -22,6 +22,7 @@
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#include <common.h>
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#include <command.h>
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#include <i2c.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/kirkwood.h>
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#include <asm/arch/mpp.h>
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@ -92,8 +93,59 @@ int board_init(void)
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}
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#if defined(CONFIG_MISC_INIT_R)
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#if defined(CONFIG_CMD_I2C) && defined(CONFIG_SYS_I2C_G762_ADDR)
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/*
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* Start I2C fan (GMT G762 controller)
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*/
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static void init_fan(void)
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{
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u8 data;
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i2c_set_bus_num(0);
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/* Enable open-loop and PWM modes */
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data = 0x20;
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if (i2c_write(CONFIG_SYS_I2C_G762_ADDR,
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G762_REG_FAN_CMD1, 1, &data, 1) != 0)
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goto err;
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data = 0;
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if (i2c_write(CONFIG_SYS_I2C_G762_ADDR,
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G762_REG_SET_CNT, 1, &data, 1) != 0)
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goto err;
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/*
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* RPM to PWM (set_out register) fan speed conversion array:
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* 0 0x00
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* 1500 0x04
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* 2800 0x08
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* 3400 0x0C
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* 3700 0x10
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* 4400 0x20
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* 4700 0x30
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* 4800 0x50
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* 5200 0x80
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* 5400 0xC0
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* 5500 0xFF
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*
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* Start fan at low speed (2800 RPM):
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*/
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data = 0x08;
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if (i2c_write(CONFIG_SYS_I2C_G762_ADDR,
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G762_REG_SET_OUT, 1, &data, 1) != 0)
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goto err;
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return;
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err:
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printf("Error: failed to start I2C fan @%02x\n",
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CONFIG_SYS_I2C_G762_ADDR);
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}
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#else
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static void init_fan(void) {}
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#endif /* CONFIG_CMD_I2C && CONFIG_SYS_I2C_G762_ADDR */
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int misc_init_r(void)
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{
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init_fan();
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#if defined(CONFIG_CMD_I2C) && defined(CONFIG_SYS_I2C_EEPROM_ADDR)
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if (!getenv("ethaddr")) {
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uchar mac[6];
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@ -103,7 +155,7 @@ int misc_init_r(void)
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#endif
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return 0;
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}
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#endif
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#endif /* CONFIG_MISC_INIT_R */
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#if defined(CONFIG_CMD_NET) && defined(CONFIG_RESET_PHY_R)
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/* Configure and initialize PHY */
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@ -32,4 +32,9 @@
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/* Buttons */
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#define NET2BIG_V2_GPIO_PUSH_BUTTON 34
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/* GMT G762 registers (I2C fan controller) */
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#define G762_REG_SET_CNT 0x00
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#define G762_REG_SET_OUT 0x03
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#define G762_REG_FAN_CMD1 0x04
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#endif /* NET2BIG_V2_H */
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@ -119,11 +119,15 @@
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#define CONFIG_SYS_PROMPT "ns2> "
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#endif
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/*
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* Enable platform initialisation via misc_init_r() function
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*/
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#define CONFIG_MISC_INIT_R
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/*
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* Ethernet Driver configuration
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*/
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#ifdef CONFIG_CMD_NET
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#define CONFIG_MISC_INIT_R /* Call misc_init_r() to initialize MAC address */
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#define CONFIG_MVGBE_PORTS {1, 0} /* enable port 0 only */
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#define CONFIG_NETCONSOLE
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#endif
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@ -153,6 +157,9 @@
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#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
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#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 4 /* 16-byte page size */
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#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1 /* 8-bit device address */
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#if defined(CONFIG_NET2BIG_V2)
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#define CONFIG_SYS_I2C_G762_ADDR 0x3e
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#endif
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#endif /* CONFIG_CMD_I2C */
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/*
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