diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/designware_i2c.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index d352146..6d118ac 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -40,6 +40,13 @@ static void set_speed(int i2c_spd) unsigned int cntl; unsigned int hcnt, lcnt; unsigned int high, low; + unsigned int enbl; + + /* to set speed cltr must be disabled */ + enbl = readl(&i2c_regs_p->ic_enable); + enbl &= ~IC_ENABLE_0B; + writel(enbl, &i2c_regs_p->ic_enable); + cntl = (readl(&i2c_regs_p->ic_con) & (~IC_CON_SPD_MSK)); @@ -71,6 +78,10 @@ static void set_speed(int i2c_spd) lcnt = (IC_CLK * low) / NANO_TO_MICRO; writel(lcnt, &i2c_regs_p->ic_fs_scl_lcnt); + + /* re-enable i2c ctrl back now that speed is set */ + enbl |= IC_ENABLE_0B; + writel(enbl, &i2c_regs_p->ic_enable); } /* |