i2c: i2c-cdns: Use proper input frequency
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>
diff --git a/drivers/i2c/i2c-cdns.c b/drivers/i2c/i2c-cdns.c
index 30be173..f2c4b20 100644
--- a/drivers/i2c/i2c-cdns.c
+++ b/drivers/i2c/i2c-cdns.c
@@ -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 @@
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 @@
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;
}