Re: [U-Boot] [PATCH 1/3] net2big_v2: initialize I2C fan at startup

-----Original Message----- From: Simon Guinot [mailto:simon.guinot@sequanux.org] Sent: 18 June 2013 02:28 To: Prafulla Wadaskar Cc: Albert ARIBAUD; u-boot@lists.denx.de Subject: [PATCH 1/3] 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

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(-)

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 */

Acked-by: Prafulla Wadaskar prafulla@marvell.com

Regards... Prafulla . . .