diff options
Diffstat (limited to 'chip/lm4/i2c.c')
| -rw-r--r-- | chip/lm4/i2c.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/chip/lm4/i2c.c b/chip/lm4/i2c.c index 70177df28f..56084c38e6 100644 --- a/chip/lm4/i2c.c +++ b/chip/lm4/i2c.c @@ -39,9 +39,10 @@ #define LM4_I2C_MCS_CLKTO BIT(7) /* - * Minimum delay between resetting the port or sending a stop condition, and - * when the port can be expected to be back in an idle state (and the slave - * has had long enough to see the start/stop condition edges). + * Minimum delay between resetting the port or sending a stop condition, + * and when the port can be expected to be back in an idle state (and + * the peripheral has had long enough to see the start/stop condition + * edges). * * 500 us = 50 clocks at 100 KHz bus speed. This has been experimentally * determined to be enough. @@ -103,7 +104,7 @@ int i2c_do_work(int port) /* * Error after starting; abort transfer. Ignore errors at * start because arbitration and timeout errors are taken care - * of in chip_i2c_xfer(), and slave ack failures will + * of in chip_i2c_xfer(), and peripheral ack failures will * automatically clear once we send a start condition. */ pd->err = EC_ERROR_UNKNOWN; @@ -165,7 +166,7 @@ int i2c_do_work(int port) return 0; } -int chip_i2c_xfer(const int port, const uint16_t slave_addr_flags, +int chip_i2c_xfer(const int port, const uint16_t addr_flags, const uint8_t *out, int out_size, uint8_t *in, int in_size, int flags) { @@ -193,7 +194,7 @@ int chip_i2c_xfer(const int port, const uint16_t slave_addr_flags, CPRINTS("I2C%d Addr:%02X bad status 0x%02x, SCL=%d, SDA=%d", port, - I2C_STRIP_FLAGS(slave_addr_flags), + I2C_STRIP_FLAGS(addr_flags), reg_mcs, i2c_get_line_levels(port) & I2C_LINE_SCL_HIGH, i2c_get_line_levels(port) & I2C_LINE_SDA_HIGH); @@ -212,14 +213,15 @@ int chip_i2c_xfer(const int port, const uint16_t slave_addr_flags, LM4_I2C_MTPR(port) = tpr; /* - * We don't know what edges the slave saw, so sleep long enough - * that the slave will see the new start condition below. + * We don't know what edges the peripheral saw, so sleep + * long enough that the peripheral will see the new + * start condition below. */ usleep(I2C_IDLE_US); } - /* Set slave address for transmit */ - LM4_I2C_MSA(port) = (I2C_STRIP_FLAGS(slave_addr_flags) << 1) & 0xff; + /* Set peripheral address for transmit */ + LM4_I2C_MSA(port) = (I2C_STRIP_FLAGS(addr_flags) << 1) & 0xff; /* Enable interrupts */ pd->task_waiting = task_get_current(); @@ -358,7 +360,7 @@ void i2c_init(void) /* Configure GPIOs */ gpio_config_module(MODULE_I2C, 1); - /* Initialize ports as master, with interrupts enabled */ + /* Initialize ports as controller, with interrupts enabled */ for (i = 0; i < i2c_ports_used; i++) LM4_I2C_MCR(i2c_ports[i].port) = 0x10; |