diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-10-17 04:37:10 -0500 |
|---|---|---|
| committer | Peter Stuge <peter@stuge.se> | 2015-10-24 02:06:52 +0200 |
| commit | f7e0a1aaaaeb98d1452aaa48fe94c371199213d6 (patch) | |
| tree | 58dd72dc561670f10683b46d1c87d5ea66a113fa /src/drivers/i2c | |
| parent | acbdade5cd02c0abed1f1a6c65501893bc6bd679 (diff) | |
drivers/i2c/w83795: Add option to use auxiliary SMBUS controller
Change-Id: I5a9b5eba992853b84b0cb6c3a1764edf42ac49b2
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12080
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Peter Stuge <peter@stuge.se>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/drivers/i2c')
| -rw-r--r-- | src/drivers/i2c/w83795/chip.h | 7 | ||||
| -rw-r--r-- | src/drivers/i2c/w83795/w83795.c | 17 |
2 files changed, 24 insertions, 0 deletions
diff --git a/src/drivers/i2c/w83795/chip.h b/src/drivers/i2c/w83795/chip.h index c8a42ea971..9a3f8475fb 100644 --- a/src/drivers/i2c/w83795/chip.h +++ b/src/drivers/i2c/w83795/chip.h @@ -139,4 +139,11 @@ struct drivers_i2c_w83795_config { uint8_t fan6_duty; /* % of full speed (0-100) */ uint8_t fan7_duty; /* % of full speed (0-100) */ uint8_t fan8_duty; /* % of full speed (0-100) */ + + uint8_t smbus_aux; /* 0 == device located on primary SMBUS, + * 1 == device located on first auxiliary + * SMBUS channel, + * <n> == device located on <n> auxiliary + * SMBUS channel + */ }; diff --git a/src/drivers/i2c/w83795/w83795.c b/src/drivers/i2c/w83795/w83795.c index 4a6486b57c..850b2d6a71 100644 --- a/src/drivers/i2c/w83795/w83795.c +++ b/src/drivers/i2c/w83795/w83795.c @@ -146,7 +146,18 @@ static void w83795_init(struct device *dev, w83795_fan_mode_t mode, u8 dts_src) uint8_t val; uint16_t limit_value; +#if IS_ENABLED(CONFIG_SMBUS_HAS_AUX_CHANNELS) + uint8_t smbus_aux_channel_prev = smbus_get_current_channel(); + smbus_switch_to_channel(config->smbus_aux); + printk(BIOS_DEBUG, "Set SMBUS controller to channel %d\n", config->smbus_aux); +#endif + if (smbus_read_byte(dev, 0x00) < 0) { +#if IS_ENABLED(CONFIG_SMBUS_HAS_AUX_CHANNELS) + /* Restore SMBUS channel setting */ + smbus_switch_to_channel(smbus_aux_channel_prev); + printk(BIOS_DEBUG, "Set SMBUS controller to channel %d\n", smbus_aux_channel_prev); +#endif printk(BIOS_ERR, "W83795G/ADG Nuvoton H/W Monitor not found\n"); return; } @@ -338,6 +349,12 @@ static void w83795_init(struct device *dev, w83795_fan_mode_t mode, u8 dts_src) val = w83795_read(dev, W83795_REG_CONFIG); val |= W83795_REG_CONFIG_START; w83795_write(dev, W83795_REG_CONFIG, val); + +#if IS_ENABLED(CONFIG_SMBUS_HAS_AUX_CHANNELS) + /* Restore SMBUS channel setting */ + smbus_switch_to_channel(smbus_aux_channel_prev); + printk(BIOS_DEBUG, "Set SMBUS controller to channel %d\n", smbus_aux_channel_prev); +#endif } static void w83795_hwm_init(struct device *dev) |