i2c: designware_i2c: Add support for fast-plus speed
Fast-plus runs at 1MHz and is used by some devices. Add support for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c
index 1f41e3e..d9e0d81 100644
--- a/drivers/i2c/designware_i2c.c
+++ b/drivers/i2c/designware_i2c.c
@@ -116,6 +116,13 @@
300,
300,
},
+ [IC_SPEED_MODE_FAST_PLUS] = {
+ I2C_SPEED_FAST_PLUS_RATE,
+ MIN_FP_SCL_HIGHTIME,
+ MIN_FP_SCL_LOWTIME,
+ 260,
+ 500,
+ },
[IC_SPEED_MODE_HIGH] = {
I2C_SPEED_HIGH_RATE,
MIN_HS_SCL_HIGHTIME,
@@ -230,6 +237,8 @@
(!scl_sda_cfg || scl_sda_cfg->has_high_speed))
i2c_spd = IC_SPEED_MODE_HIGH;
else if (speed >= I2C_SPEED_FAST_RATE)
+ i2c_spd = IC_SPEED_MODE_FAST_PLUS;
+ else if (speed >= I2C_SPEED_FAST_PLUS_RATE)
i2c_spd = IC_SPEED_MODE_FAST;
else
i2c_spd = IC_SPEED_MODE_STANDARD;
@@ -271,13 +280,12 @@
writel(config.scl_hcnt, &i2c_base->ic_hs_scl_hcnt);
writel(config.scl_lcnt, &i2c_base->ic_hs_scl_lcnt);
break;
-
case IC_SPEED_MODE_STANDARD:
cntl |= IC_CON_SPD_SS;
writel(config.scl_hcnt, &i2c_base->ic_ss_scl_hcnt);
writel(config.scl_lcnt, &i2c_base->ic_ss_scl_lcnt);
break;
-
+ case IC_SPEED_MODE_FAST_PLUS:
case IC_SPEED_MODE_FAST:
default:
cntl |= IC_CON_SPD_FS;