diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/i2c-cdns.c | 48 |
1 files changed, 11 insertions, 37 deletions
diff --git a/drivers/i2c/i2c-cdns.c b/drivers/i2c/i2c-cdns.c index 66bd580..0bc6aaa 100644 --- a/drivers/i2c/i2c-cdns.c +++ b/drivers/i2c/i2c-cdns.c @@ -115,41 +115,6 @@ struct i2c_cdns_bus { struct cdns_i2c_regs __iomem *regs; /* register base */ }; - -/** cdns_i2c_probe() - Probe method - * @dev: udevice pointer - * - * DM callback called when device is probed - */ -static int cdns_i2c_probe(struct udevice *dev) -{ - struct i2c_cdns_bus *bus = dev_get_priv(dev); - - /* TODO: Calculate dividers based on CPU_CLK_1X */ - /* 111MHz / ( (3 * 17) * 22 ) = ~100KHz */ - writel((16 << CDNS_I2C_CONTROL_DIV_B_SHIFT) | - (2 << CDNS_I2C_CONTROL_DIV_A_SHIFT), &bus->regs->control); - - /* Enable master mode, ack, and 7-bit addressing */ - setbits_le32(&bus->regs->control, CDNS_I2C_CONTROL_MS | - CDNS_I2C_CONTROL_ACKEN | CDNS_I2C_CONTROL_NEA); - - debug("%s bus %d at %p\n", __func__, dev->seq, bus->regs); - - return 0; -} - -static int cdns_i2c_remove(struct udevice *dev) -{ - struct i2c_cdns_bus *bus = dev_get_priv(dev); - - debug("%s bus %d at %p\n", __func__, dev->seq, bus->regs); - - unmap_sysmem(bus->regs); - - return 0; -} - /* Wait for an interrupt */ static u32 cdns_i2c_wait(struct cdns_i2c_regs *cdns_i2c, u32 mask) { @@ -170,12 +135,23 @@ static u32 cdns_i2c_wait(struct cdns_i2c_regs *cdns_i2c, u32 mask) static int cdns_i2c_set_bus_speed(struct udevice *dev, unsigned int speed) { + struct i2c_cdns_bus *bus = dev_get_priv(dev); + if (speed != 100000) { printf("%s, failed to set clock speed to %u\n", __func__, speed); return -EINVAL; } + /* TODO: Calculate dividers based on CPU_CLK_1X */ + /* 111MHz / ( (3 * 17) * 22 ) = ~100KHz */ + writel((16 << CDNS_I2C_CONTROL_DIV_B_SHIFT) | + (2 << CDNS_I2C_CONTROL_DIV_A_SHIFT), &bus->regs->control); + + /* Enable master mode, ack, and 7-bit addressing */ + setbits_le32(&bus->regs->control, CDNS_I2C_CONTROL_MS | + CDNS_I2C_CONTROL_ACKEN | CDNS_I2C_CONTROL_NEA); + return 0; } @@ -335,8 +311,6 @@ U_BOOT_DRIVER(cdns_i2c) = { .name = "i2c-cdns", .id = UCLASS_I2C, .of_match = cdns_i2c_of_match, - .probe = cdns_i2c_probe, - .remove = cdns_i2c_remove, .ofdata_to_platdata = cdns_i2c_ofdata_to_platdata, .priv_auto_alloc_size = sizeof(struct i2c_cdns_bus), .ops = &cdns_i2c_ops, |