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i2c: i2c-cdns: Use proper input frequency

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This is needed to properly calculate i2c bus speed divisors.

Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com>
Signed-off-by: Wojciech Tatarski <wtatarski@antmicro.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Tomasz Gorochowik 2019-01-03 13:36:33 +01:00 committed by Heiko Schocher
parent ad827a500b
commit f48ef0d81a
1 changed files with 8 additions and 1 deletions
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9
drivers/i2c/i2c-cdns.c
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@ -17,6 +17,7 @@
#include <fdtdec.h>
#include <mapmem.h>
#include <wait_bit.h>
#include <clk.h>
/* i2c register set */
struct cdns_i2c_regs {
@ -415,6 +416,8 @@ static int cdns_i2c_ofdata_to_platdata(struct udevice *dev)
struct i2c_cdns_bus *i2c_bus = dev_get_priv(dev);
struct cdns_i2c_platform_data *pdata =
(struct cdns_i2c_platform_data *)dev_get_driver_data(dev);
struct clk clk;
int ret;
i2c_bus->regs = (struct cdns_i2c_regs *)devfdt_get_addr(dev);
if (!i2c_bus->regs)
@ -423,7 +426,11 @@ static int cdns_i2c_ofdata_to_platdata(struct udevice *dev)
if (pdata)
i2c_bus->quirks = pdata->quirks;
i2c_bus->input_freq = 100000000; /* TODO hardcode input freq for now */
ret = clk_get_by_index(dev, 0, &clk);
if (ret)
return ret;
i2c_bus->input_freq = clk_get_rate(&clk);
return 0;
}