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| author | Michal Simek <michal.simek@xilinx.com> | 2016-04-14 14:15:48 +0200 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2016-05-17 08:28:48 +0200 |
| commit | 6150be9094bb155022da3843b56e6314edf54305 (patch) | |
| tree | 9de8c274909a14408bc1c32c19c35c21f3fed5ba | |
| parent | a13767bc0ee8ccaf4e7f64192e7f1d408dc7f900 (diff) | |
| download | u-boot-6150be9094bb155022da3843b56e6314edf54305.zip u-boot-6150be9094bb155022da3843b56e6314edf54305.tar.gz u-boot-6150be9094bb155022da3843b56e6314edf54305.tar.bz2 | |
i2c: cdns: Moving speed setup from probe to set_bus_speed function
set_bus_speed is the right function where bus speed should be setup.
This move enable option to remove probe and remove functions which are
empty.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
| -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, |