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i2c: designware_i2c: Use an enum for selected speed mode

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Group these #defines into an enum to make it easier to understand the
relationship between them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jun Chen <ptchentw@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Simon Glass 2020-01-23 11:48:08 -07:00 • committed by Heiko Schocher
parent 6db7943b92
commit 65190d15ef
2 changed files with 8 additions and 4 deletions
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2
drivers/i2c/designware_i2c.c
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@ -57,10 +57,10 @@ static unsigned int __dw_i2c_set_bus_speed(struct i2c_regs *i2c_base,
unsigned int speed,
unsigned int bus_mhz)
{
enum i2c_speed_mode i2c_spd;
unsigned int cntl;
unsigned int hcnt, lcnt;
unsigned int ena;
int i2c_spd;
/* Allow high speed if there is no config, or the config allows it */
if (speed >= I2C_HIGH_SPEED &&

10
drivers/i2c/designware_i2c.h
View file

@ -136,9 +136,13 @@ struct i2c_regs {
#define IC_STATUS_ACT 0x0001
/* Speed Selection */
#define IC_SPEED_MODE_STANDARD 1
#define IC_SPEED_MODE_FAST 2
#define IC_SPEED_MODE_HIGH 3
enum i2c_speed_mode {
IC_SPEED_MODE_STANDARD,
IC_SPEED_MODE_FAST,
IC_SPEED_MODE_HIGH,
IC_SPEED_MODE_COUNT,
};
#define I2C_HIGH_SPEED 3400000
#define I2C_FAST_SPEED 400000