diff options
Diffstat (limited to 'drivers/tty/serial/max310x.c')
| -rw-r--r-- | drivers/tty/serial/max310x.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index efe55a1a0615..3db48fcd6068 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -531,8 +531,8 @@ static int max310x_update_best_err(unsigned long f, long *besterr) return 1; } -static int max310x_set_ref_clk(struct max310x_port *s, unsigned long freq, - bool xtal) +static int max310x_set_ref_clk(struct device *dev, struct max310x_port *s, + unsigned long freq, bool xtal) { unsigned int div, clksrc, pllcfg = 0; long besterr = -1; @@ -588,8 +588,14 @@ static int max310x_set_ref_clk(struct max310x_port *s, unsigned long freq, regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc); /* Wait for crystal */ - if (pllcfg && xtal) + if (xtal) { + unsigned int val; msleep(10); + regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &val); + if (!(val & MAX310X_STS_CLKREADY_BIT)) { + dev_warn(dev, "clock is not stable yet\n"); + } + } return (int)bestfreq; } @@ -1260,7 +1266,7 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, MAX310X_MODE1_AUTOSLEEP_BIT); } - uartclk = max310x_set_ref_clk(s, freq, xtal); + uartclk = max310x_set_ref_clk(dev, s, freq, xtal); dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk); mutex_init(&s->mutex); |