Commit 2af4d0f4 authored by Simon Guinot's avatar Simon Guinot Committed by Prafulla Wadaskar
Browse files

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: default avatarSimon Guinot <simon.guinot@sequanux.org>
Acked-by: default avatarPrafulla Wadaskar <prafulla@marvell.com>
parent c2543a21
......@@ -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 */
......
......@@ -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 */
......@@ -119,11 +119,15 @@
#define CONFIG_SYS_PROMPT "ns2> "
#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 */
/*
......
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