diff options
author | Alexander Shiyan <shc_work@mail.ru> | 2014-02-10 18:18:32 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 17:34:47 (GMT) |
commit | dba29a2894771562d265232ae4b61f0310bab1f5 (patch) | |
tree | 005e94d3ce88997382ac8c771619ace115ba749a /drivers/tty/serial/max310x.c | |
parent | d3a8a252e177cfaa2fb04120dd944104e4417bf5 (diff) | |
download | linux-dba29a2894771562d265232ae4b61f0310bab1f5.tar.xz |
serial: max310x: Always use dynamic GPIO ID assignment
Always register GPIOs and use dynamic GPIO ID assignment.
This is no much worth if GPIOs is not used, but helps remove
private driver header and add DT support in the future.
Additionally, patch adds missing uart_unregister_driver()
call if probe() fails.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/max310x.c')
-rw-r--r-- | drivers/tty/serial/max310x.c | 55 |
1 files changed, 28 insertions, 27 deletions
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 310ee55..2a12cbc 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -294,7 +294,6 @@ struct max310x_port { struct mutex mutex; struct clk *clk; struct max310x_pdata *pdata; - int gpio_used; #ifdef CONFIG_GPIOLIB struct gpio_chip gpio; #endif @@ -1177,6 +1176,23 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, goto out_clk; } +#ifdef CONFIG_GPIOLIB + /* Setup GPIO cotroller */ + s->gpio.owner = THIS_MODULE; + s->gpio.dev = dev; + s->gpio.label = dev_name(dev); + s->gpio.direction_input = max310x_gpio_direction_input; + s->gpio.get = max310x_gpio_get; + s->gpio.direction_output= max310x_gpio_direction_output; + s->gpio.set = max310x_gpio_set; + s->gpio.base = -1; + s->gpio.ngpio = devtype->nr * 4; + s->gpio.can_sleep = 1; + ret = gpiochip_add(&s->gpio); + if (ret) + goto out_uart; +#endif + for (i = 0; i < devtype->nr; i++) { /* Initialize port data */ s->p[i].port.line = i; @@ -1208,25 +1224,6 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, devtype->power(&s->p[i].port, 0); } -#ifdef CONFIG_GPIOLIB - /* Setup GPIO cotroller */ - if (s->pdata->gpio_base) { - s->gpio.owner = THIS_MODULE; - s->gpio.dev = dev; - s->gpio.label = dev_name(dev); - s->gpio.direction_input = max310x_gpio_direction_input; - s->gpio.get = max310x_gpio_get; - s->gpio.direction_output= max310x_gpio_direction_output; - s->gpio.set = max310x_gpio_set; - s->gpio.base = s->pdata->gpio_base; - s->gpio.ngpio = devtype->nr * 4; - s->gpio.can_sleep = 1; - if (!gpiochip_add(&s->gpio)) - s->gpio_used = 1; - } else - dev_info(dev, "GPIO support not enabled\n"); -#endif - /* Setup interrupt */ ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, @@ -1235,11 +1232,14 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, return 0; dev_err(dev, "Unable to reguest IRQ %i\n", irq); + #ifdef CONFIG_GPIOLIB - if (s->gpio_used) - WARN_ON(gpiochip_remove(&s->gpio)); + WARN_ON(gpiochip_remove(&s->gpio)); #endif +out_uart: + uart_unregister_driver(&s->uart); + out_clk: clk_disable_unprepare(s->clk); @@ -1251,6 +1251,12 @@ static int max310x_remove(struct device *dev) struct max310x_port *s = dev_get_drvdata(dev); int i, ret = 0; +#ifdef CONFIG_GPIOLIB + ret = gpiochip_remove(&s->gpio); + if (ret) + return ret; +#endif + for (i = 0; i < s->uart.nr; i++) { cancel_work_sync(&s->p[i].tx_work); cancel_work_sync(&s->p[i].md_work); @@ -1261,11 +1267,6 @@ static int max310x_remove(struct device *dev) uart_unregister_driver(&s->uart); clk_disable_unprepare(s->clk); -#ifdef CONFIG_GPIOLIB - if (s->gpio_used) - ret = gpiochip_remove(&s->gpio); -#endif - return ret; } |