diff options
Diffstat (limited to 'drivers/tty/serial/serial_mctrl_gpio.c')
| -rw-r--r-- | drivers/tty/serial/serial_mctrl_gpio.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index e8dd5097dc56..d2da6aa7f27d 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -52,6 +52,9 @@ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl) int value_array[UART_GPIO_MAX]; unsigned int count = 0; + if (gpios == NULL) + return; + for (i = 0; i < UART_GPIO_MAX; i++) if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) { desc_array[count] = gpios->gpio[i]; @@ -73,6 +76,9 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return *mctrl; + for (i = 0; i < UART_GPIO_MAX; i++) { if (gpios->gpio[i] && !mctrl_gpios_desc[i].dir_out) { if (gpiod_get_value(gpios->gpio[i])) @@ -86,6 +92,27 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) } EXPORT_SYMBOL_GPL(mctrl_gpio_get); +unsigned int +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl) +{ + enum mctrl_gpio_idx i; + + if (gpios == NULL) + return *mctrl; + + for (i = 0; i < UART_GPIO_MAX; i++) { + if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) { + if (gpiod_get_value(gpios->gpio[i])) + *mctrl |= mctrl_gpios_desc[i].mctrl; + else + *mctrl &= ~mctrl_gpios_desc[i].mctrl; + } + } + + return *mctrl; +} +EXPORT_SYMBOL_GPL(mctrl_gpio_get_outputs); + struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx) { struct mctrl_gpios *gpios; @@ -203,6 +230,9 @@ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + for (i = 0; i < UART_GPIO_MAX; i++) { if (gpios->irq[i]) devm_free_irq(gpios->port->dev, gpios->irq[i], gpios); @@ -218,6 +248,9 @@ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + /* .enable_ms may be called multiple times */ if (gpios->mctrl_on) return; @@ -240,6 +273,9 @@ void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + if (!gpios->mctrl_on) return; |