diff options
| author | Philippe Langlais <philippe.langlais@linaro.org> | 2012-01-13 12:46:53 +0100 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:06:10 +0200 |
| commit | 78ec329add085434c6cdc5ff199b633a7431dadb (patch) | |
| tree | 2a63270da03ccefcb9cebc55afb9264c5d77f37b | |
| parent | e38b899c7d35e03ad9a66e40a7ca0092e34aa969 (diff) | |
mach-ux500: lsm303dh: Read the chip_id of LSM303
Check which accelerometer chip is
mounted and read the chip ID to detect
whether chip is LSM303DHL/LSM303DHLC.
Signed-off-by: Naga Radhesh <naga.radheshy@stericsson.com>
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
| -rw-r--r-- | arch/arm/mach-ux500/board-mop500-sensors.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/arch/arm/mach-ux500/board-mop500-sensors.c b/arch/arm/mach-ux500/board-mop500-sensors.c index bc08e332699..eff8295e97a 100644 --- a/arch/arm/mach-ux500/board-mop500-sensors.c +++ b/arch/arm/mach-ux500/board-mop500-sensors.c @@ -146,10 +146,38 @@ void mop500_sensors_probe_add_lsm303dlh_a(void) i2c_put_adapter(adap); } +/* + * Check which accelerometer chip is mounted on UIB and + * read the chip ID to detect whether chip is LSM303DHL/LSM303DHLC. + */ +static int mop500_get_acc_id(void) +{ + int status; + union i2c_smbus_data data; + struct i2c_adapter *i2c2; + + i2c2 = i2c_get_adapter(2); + if (!i2c2) { + pr_err("failed to get i2c adapter\n"); + return -1; + } + status = i2c_smbus_xfer(i2c2, 0x18 , 0 , + I2C_SMBUS_READ, 0x0F , + I2C_SMBUS_BYTE_DATA, &data); + if (status < 0) { + status = i2c_smbus_xfer(i2c2, 0x19 , 0 , + I2C_SMBUS_READ, 0x0F , + I2C_SMBUS_BYTE_DATA, &data); + } + i2c_put_adapter(i2c2); + return (status < 0) ? status : data.byte; +} + static int __init mop500_sensors_init(void) { + int ret; - if (!machine_is_snowball() && !uib_is_stuib()) + if (!machine_is_snowball() && !uib_is_stuib() && !uib_is_u8500uibr3()) return 0; if (machine_is_hrefv60()) { @@ -166,6 +194,12 @@ static int __init mop500_sensors_init(void) lsm303dlh_pdata.irq_m = GPIO_MAGNET_DRDY; } + ret = mop500_get_acc_id(); + if (ret < 0) + printk(KERN_ERR " Failed to get Accelerometer chip ID\n"); + else + lsm303dlh_pdata.chip_id = ret; + mop500_sensors_i2c_add(2, mop500_i2c2_devices, ARRAY_SIZE(mop500_i2c2_devices)); |