sc16is7xx: Add flag to activate IrDA mode (9eb90d57) · Commits · 戴 / test

drivers/tty/serial/sc16is7xx.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -315,6 +315,7 @@ struct sc16is7xx_one {
		struct kthread_work tx_work;
		struct kthread_work reg_work;
		struct sc16is7xx_one_config config;
		bool irda_mode;
		};

		struct sc16is7xx_port {
		@@ -986,6 +987,7 @@ static int sc16is7xx_config_rs485(struct uart_port *port,

		static int sc16is7xx_startup(struct uart_port *port)
		{
		struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
		struct sc16is7xx_port *s = dev_get_drvdata(port->dev);
		unsigned int val;

		@@ -1024,6 +1026,13 @@ static int sc16is7xx_startup(struct uart_port *port)
		/* Now, initialize the UART */
		sc16is7xx_port_write(port, SC16IS7XX_LCR_REG, SC16IS7XX_LCR_WORD_LEN_8);

		/* Enable IrDA mode if requested in DT */
		/* This bit must be written with LCR[7] = 0 */
		sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
		SC16IS7XX_MCR_IRDA_BIT,
		one->irda_mode ?
		SC16IS7XX_MCR_IRDA_BIT : 0);

		/* Enable the Rx and Tx FIFO */
		sc16is7xx_port_update(port, SC16IS7XX_EFCR_REG,
		SC16IS7XX_EFCR_RXDISABLE_BIT \|
		@@ -1304,6 +1313,17 @@ static int sc16is7xx_probe(struct device *dev,
		sc16is7xx_power(&s->p[i].port, 0);
		}

		if (dev->of_node) {
		struct property *prop;
		const __be32 *p;
		u32 u;

		of_property_for_each_u32(dev->of_node, "irda-mode-ports",
		prop, p, u)
		if (u < devtype->nr_uart)
		s->p[u].irda_mode = true;
		}

		/*
		* Setup interrupt. We first try to acquire the IRQ line as level IRQ.
		* If that succeeds, we can allow sharing the interrupt as well.