diff options
Diffstat (limited to 'drivers/tty/serial/sc16is7xx.c')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 9adb8362578c..acbb615dd28f 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1208,8 +1208,16 @@ static int sc16is7xx_probe(struct device *dev, /* Always ask for fixed clock rate from a property. */ device_property_read_u32(dev, "clock-frequency", &uartclk); - s->clk = devm_clk_get(dev, NULL); - if (IS_ERR(s->clk)) { + s->clk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(s->clk)) + return PTR_ERR(s->clk); + + ret = clk_prepare_enable(s->clk); + if (ret) + return ret; + + freq = clk_get_rate(s->clk); + if (freq == 0) { if (uartclk) freq = uartclk; if (pfreq) @@ -1217,13 +1225,7 @@ static int sc16is7xx_probe(struct device *dev, if (freq) dev_dbg(dev, "Clock frequency: %luHz\n", freq); else - return PTR_ERR(s->clk); - } else { - ret = clk_prepare_enable(s->clk); - if (ret) - return ret; - - freq = clk_get_rate(s->clk); + return -EINVAL; } s->regmap = regmap; @@ -1358,8 +1360,7 @@ out_thread: kthread_stop(s->kworker_task); out_clk: - if (!IS_ERR(s->clk)) - clk_disable_unprepare(s->clk); + clk_disable_unprepare(s->clk); return ret; } @@ -1383,8 +1384,7 @@ static int sc16is7xx_remove(struct device *dev) kthread_flush_worker(&s->kworker); kthread_stop(s->kworker_task); - if (!IS_ERR(s->clk)) - clk_disable_unprepare(s->clk); + clk_disable_unprepare(s->clk); return 0; } |