Custom parameters for HCNT/LCNT are not available for OF based system.
Thus, we will use existing SCL timing parameter calculation functions
for Fast Mode Plus.
Signed-off-by: Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-designware-master.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 3a58eef20936..23038d7272da 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -76,14 +76,27 @@ static int i2c_dw_set_timings_master(struct dw_i2c_dev *dev)
*/
if (t->bus_freq_hz == 1000000) {
/*
- * Check are fast mode plus parameters available and use
- * fast mode if not.
+ * Check are Fast Mode Plus parameters available. Calculate
+ * SCL timing parameters for Fast Mode Plus if not set.
*/
if (dev->fp_hcnt && dev->fp_lcnt) {
dev->fs_hcnt = dev->fp_hcnt;
dev->fs_lcnt = dev->fp_lcnt;
- fp_str = " Plus";
+ } else {
+ ic_clk = i2c_dw_clk_rate(dev);
+ dev->fs_hcnt =
+ i2c_dw_scl_hcnt(ic_clk,
+ 260, /* tHIGH = 260 ns */
+ sda_falling_time,
+ 0, /* DW default */
+ 0); /* No offset */
+ dev->fs_lcnt =
+ i2c_dw_scl_lcnt(ic_clk,
+ 500, /* tLOW = 500 ns */
+ scl_falling_time,
+ 0); /* No offset */
}
+ fp_str = " Plus";
}
/*
* Calculate SCL timing parameters for fast mode if not set. They are
--
2.17.1
