diff options
| author | Wayne Zou <b36644@freescale.com> | 2011-08-08 10:12:32 +0800 |
|---|---|---|
| committer | Wayne Zou <b36644@freescale.com> | 2011-08-08 13:02:34 +0800 |
| commit | 75530c5d1befb9e6a3406704f8eb6146e4b6b149 (patch) | |
| tree | d4ba8ce415f47ba434004bb46158de37f0e2f8ee /drivers/mfd/da9052-core.c | |
| parent | c87039fda69de9bc8d5db128a57e72cd861d9bc5 (diff) | |
ENGR00154432 PMIC DA9053: fix I2C NAK for first access and shutdown issue
During the platform boot up, during the platform does DA9053 Read/Write
operation, it writes slave address and wait for ACK . Instead of ACK
PMIC sends NAK. A workaround fix is provided as a part of retries
fix I2C NAK for very first access.
Also fix a bug when the system fails to start after software shutdown.
Signed-off-by: Wayne Zou <b36644@freescale.com>
Diffstat (limited to 'drivers/mfd/da9052-core.c')
| -rw-r--r-- | drivers/mfd/da9052-core.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c index 571006baf796..8783b76a0b6a 100644 --- a/drivers/mfd/da9052-core.c +++ b/drivers/mfd/da9052-core.c @@ -536,17 +536,17 @@ void da9052_ssc_exit(struct da9052 *da9052) void da9053_power_off(void) { struct da9052_ssc_msg ssc_msg; + struct da9052_ssc_msg ssc_msg_dummy[2]; if (!da9052_data) return; ssc_msg.addr = DA9052_CONTROLB_REG; da9052_data->read(da9052_data, &ssc_msg); - ssc_msg.data |= DA9052_CONTROLB_SHUTDOWN; - pr_info("da9052 shutdown: DA9052_CONTROLB_REG=%x\n", ssc_msg.data); - da9052_data->write(da9052_data, &ssc_msg); - ssc_msg.addr = DA9052_GPID9_REG; - ssc_msg.data = 0; - da9052_data->read(da9052_data, &ssc_msg); + ssc_msg_dummy[0].addr = DA9052_CONTROLB_REG; + ssc_msg_dummy[0].data = ssc_msg.data | DA9052_CONTROLB_SHUTDOWN; + ssc_msg_dummy[1].addr = DA9052_GPID9_REG; + ssc_msg_dummy[1].data = 0; + da9052_data->write_many(da9052_data, &ssc_msg_dummy[0], 2); } int da9053_get_chip_version(void) |