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i2c: cdns: Read address from DT in ofdata_to_platdata 

Extract reading IP base address in function which is designed for it.
Also enable option to read more information from DT in this function.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Michal Simek 2016-04-14 14:15:47 +02:00 committed by Heiko Schocher
parent aeaec0e682
commit a13767bc0e
1 changed files with 12 additions and 4 deletions
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16
drivers/i2c/i2c-cdns.c
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@ -125,10 +125,6 @@ static int cdns_i2c_probe(struct udevice *dev)
{ {
struct i2c_cdns_bus *bus = dev_get_priv(dev); struct i2c_cdns_bus *bus = dev_get_priv(dev);
bus->regs = (struct cdns_i2c_regs *)dev_get_addr(dev);
if (!bus->regs)
return -ENOMEM;
/* TODO: Calculate dividers based on CPU_CLK_1X */ /* TODO: Calculate dividers based on CPU_CLK_1X */
/* 111MHz / ( (3 * 17) * 22 ) = ~100KHz */ /* 111MHz / ( (3 * 17) * 22 ) = ~100KHz */
writel((16 << CDNS_I2C_CONTROL_DIV_B_SHIFT) | writel((16 << CDNS_I2C_CONTROL_DIV_B_SHIFT) |
@ -313,6 +309,17 @@ static int cdns_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
return 0; return 0;
} }
static int cdns_i2c_ofdata_to_platdata(struct udevice *dev)
{
struct i2c_cdns_bus *i2c_bus = dev_get_priv(dev);
i2c_bus->regs = (struct cdns_i2c_regs *)dev_get_addr(dev);
if (!i2c_bus->regs)
return -ENOMEM;
return 0;
}
static const struct dm_i2c_ops cdns_i2c_ops = { static const struct dm_i2c_ops cdns_i2c_ops = {
.xfer = cdns_i2c_xfer, .xfer = cdns_i2c_xfer,
.probe_chip = cdns_i2c_probe_chip, .probe_chip = cdns_i2c_probe_chip,
@ -330,6 +337,7 @@ U_BOOT_DRIVER(cdns_i2c) = {
.of_match = cdns_i2c_of_match, .of_match = cdns_i2c_of_match,
.probe = cdns_i2c_probe, .probe = cdns_i2c_probe,
.remove = cdns_i2c_remove, .remove = cdns_i2c_remove,
.ofdata_to_platdata = cdns_i2c_ofdata_to_platdata,
.priv_auto_alloc_size = sizeof(struct i2c_cdns_bus), .priv_auto_alloc_size = sizeof(struct i2c_cdns_bus),
.ops = &cdns_i2c_ops, .ops = &cdns_i2c_ops,
}; };