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i2c: designware_i2c: Separate out the speed calculation

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We want to be able to calculate the speed separately from actually setting
the speed, so we can generate the required ACPI tables. Split out the
calculation into its own function.

Drop the double underscore on __dw_i2c_set_bus_speed while we are here.
That is reserved for compiler internals.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2020-01-23 11:48:25 -07:00
committed by Heiko Schocher
parent a8d2b515f9
commit 23ad52ebb1
2 changed files with 55 additions and 40 deletions
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3
drivers/i2c/designware_i2c.h
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@@ -8,6 +8,7 @@
#define __DW_I2C_H_
#include <clk.h>
#include <i2c.h>
#include <reset.h>
struct i2c_regs {
@@ -165,12 +166,14 @@ struct dw_scl_sda_cfg {
* @scl_lcnt: Low count value for SCL
* @scl_hcnt: High count value for SCL
* @sda_hold: Data hold count
* @speed_mode: Speed mode being used
*/
struct dw_i2c_speed_config {
/* SCL high and low period count */
u16 scl_lcnt;
u16 scl_hcnt;
u32 sda_hold;
enum i2c_speed_mode speed_mode;
};
/**