serial: Embed rs485_supported to uart_port

Embed rs485_supported to uart_port to allow serial core to tweak it as
needed.
Reviewed-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220704094515.6831-2-ilpo.jarvinen@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_bcm2835aux.c

@@ -108,7 +108,7 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
 	up.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE |
 			UPF_SKIP_TEST | UPF_IOREMAP;
 	up.port.rs485_config = serial8250_em485_config;
-	up.port.rs485_supported = &serial8250_em485_supported;
+	up.port.rs485_supported = serial8250_em485_supported;
 	up.rs485_start_tx = bcm2835aux_rs485_start_tx;
 	up.rs485_stop_tx = bcm2835aux_rs485_stop_tx;
 

drivers/tty/serial/8250/8250_dwlib.c

@@ -255,10 +255,10 @@ void dw8250_setup_port(struct uart_port *p)
 	if (pd->hw_rs485_support) {
 		p->rs485_config = dw8250_rs485_config;
 		up->lsr_save_mask = LSR_SAVE_FLAGS | DW_UART_LSR_ADDR_RCVD;
-		p->rs485_supported = &dw8250_rs485_supported;
+		p->rs485_supported = dw8250_rs485_supported;
 	} else {
 		p->rs485_config = serial8250_em485_config;
-		p->rs485_supported = &serial8250_em485_supported;
+		p->rs485_supported = serial8250_em485_supported;
 		up->rs485_start_tx = serial8250_em485_start_tx;
 		up->rs485_stop_tx = serial8250_em485_stop_tx;
 	}

drivers/tty/serial/8250/8250_exar.c

@@ -550,7 +550,7 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
 
 	port->port.uartclk = baud * 16;
 	port->port.rs485_config = platform->rs485_config;
-	port->port.rs485_supported = platform->rs485_supported;
+	port->port.rs485_supported = *(platform->rs485_supported);
 
 	/*
 	 * Setup the UART clock for the devices on expansion slot to

drivers/tty/serial/8250/8250_fintek.c

@@ -433,9 +433,9 @@ static void fintek_8250_set_rs485_handler(struct uart_8250_port *uart)
 	case CHIP_ID_F81865:
 		uart->port.rs485_config = fintek_8250_rs485_config;
 		if (!pdata->index)
-			uart->port.rs485_supported = &fintek_8250_rs485_supported_port0;
+			uart->port.rs485_supported = fintek_8250_rs485_supported_port0;
 		else
-			uart->port.rs485_supported = &fintek_8250_rs485_supported;
+			uart->port.rs485_supported = fintek_8250_rs485_supported;
 		break;
 
 	default: /* No RS485 Auto direction functional */

drivers/tty/serial/8250/8250_lpc18xx.c

@@ -161,7 +161,7 @@ static int lpc18xx_serial_probe(struct platform_device *pdev)
 	uart.port.uartclk = clk_get_rate(data->clk_uart);
 	uart.port.private_data = data;
 	uart.port.rs485_config = lpc18xx_rs485_config;
-	uart.port.rs485_supported = &lpc18xx_rs485_supported;
+	uart.port.rs485_supported = lpc18xx_rs485_supported;
 	uart.port.serial_out = lpc18xx_uart_serial_out;
 
 	uart.dma = &data->dma;

drivers/tty/serial/8250/8250_of.c

@@ -165,7 +165,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 
 	port->dev = &ofdev->dev;
 	port->rs485_config = serial8250_em485_config;
-	port->rs485_supported = &serial8250_em485_supported;
+	port->rs485_supported = serial8250_em485_supported;
 	up->rs485_start_tx = serial8250_em485_start_tx;
 	up->rs485_stop_tx = serial8250_em485_stop_tx;
 

drivers/tty/serial/8250/8250_pci.c

@@ -1607,7 +1607,7 @@ static int pci_fintek_setup(struct serial_private *priv,
 	port->port.iotype = UPIO_PORT;
 	port->port.iobase = iobase;
 	port->port.rs485_config = pci_fintek_rs485_config;
-	port->port.rs485_supported = &pci_fintek_rs485_supported;
+	port->port.rs485_supported = pci_fintek_rs485_supported;
 
 	data = devm_kzalloc(&pdev->dev, sizeof(u8), GFP_KERNEL);
 	if (!data)

drivers/tty/serial/amba-pl011.c

@@ -2779,7 +2779,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 	uap->port.irq = dev->irq[0];
 	uap->port.ops = &amba_pl011_pops;
 	uap->port.rs485_config = pl011_rs485_config;
-	uap->port.rs485_supported = &pl011_rs485_supported;
+	uap->port.rs485_supported = pl011_rs485_supported;
 	snprintf(uap->type, sizeof(uap->type), "PL011 rev%u", amba_rev(dev));
 
 	ret = pl011_setup_port(&dev->dev, uap, &dev->res, portnr);

drivers/tty/serial/ar933x_uart.c

@@ -778,7 +778,7 @@ static int ar933x_uart_probe(struct platform_device *pdev)
 	port->fifosize = AR933X_UART_FIFO_SIZE;
 	port->ops = &ar933x_uart_ops;
 	port->rs485_config = ar933x_config_rs485;
-	port->rs485_supported = &ar933x_rs485_supported;
+	port->rs485_supported = ar933x_rs485_supported;
 
 	baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1);
 	up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD);
@@ -802,7 +802,7 @@ static int ar933x_uart_probe(struct platform_device *pdev)
 	    !up->rts_gpiod) {
 		dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n");
 		port->rs485.flags &= ~SER_RS485_ENABLED;
-		port->rs485_supported = &ar933x_no_rs485;
+		port->rs485_supported = ar933x_no_rs485;
 	}
 
 #ifdef CONFIG_SERIAL_AR933X_CONSOLE

drivers/tty/serial/atmel_serial.c

@@ -2498,7 +2498,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
 	port->mapbase		= mpdev->resource[0].start;
 	port->irq		= platform_get_irq(mpdev, 0);
 	port->rs485_config	= atmel_config_rs485;
-	port->rs485_supported	= &atmel_rs485_supported;
+	port->rs485_supported	= atmel_rs485_supported;
 	port->iso7816_config	= atmel_config_iso7816;
 	port->membase		= NULL;
 

drivers/tty/serial/fsl_lpuart.c

@@ -2655,7 +2655,7 @@ static int lpuart_probe(struct platform_device *pdev)
 		sport->port.rs485_config = lpuart32_config_rs485;
 	else
 		sport->port.rs485_config = lpuart_config_rs485;
-	sport->port.rs485_supported = &lpuart_rs485_supported;
+	sport->port.rs485_supported = lpuart_rs485_supported;
 
 	sport->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
 	if (IS_ERR(sport->ipg_clk)) {

drivers/tty/serial/imx.c

@@ -2285,9 +2285,9 @@ static int imx_uart_probe(struct platform_device *pdev)
 	sport->port.rs485_config = imx_uart_rs485_config;
 	/* RTS is required to control the RS485 transmitter */
 	if (sport->have_rtscts || sport->have_rtsgpio)
-		sport->port.rs485_supported = &imx_rs485_supported;
+		sport->port.rs485_supported = imx_rs485_supported;
 	else
-		sport->port.rs485_supported = &imx_no_rs485;
+		sport->port.rs485_supported = imx_no_rs485;
 	sport->port.flags = UPF_BOOT_AUTOCONF;
 	timer_setup(&sport->timer, imx_uart_timeout, 0);
 

drivers/tty/serial/max310x.c

@@ -1370,7 +1370,7 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
 		s->p[i].port.membase	= (void __iomem *)~0;
 		s->p[i].port.uartclk	= uartclk;
 		s->p[i].port.rs485_config = max310x_rs485_config;
-		s->p[i].port.rs485_supported = &max310x_rs485_supported;
+		s->p[i].port.rs485_supported = max310x_rs485_supported;
 		s->p[i].port.ops	= &max310x_ops;
 		s->p[i].regmap		= regmaps[i];
 

drivers/tty/serial/mcf.c

@@ -506,7 +506,7 @@ int __init early_mcf_setup(struct mcf_platform_uart *platp)
 		port->uartclk = MCF_BUSCLK;
 		port->flags = UPF_BOOT_AUTOCONF;
 		port->rs485_config = mcf_config_rs485;
-		port->rs485_supported = &mcf_rs485_supported;
+		port->rs485_supported = mcf_rs485_supported;
 		port->ops = &mcf_uart_ops;
 	}
 
@@ -634,7 +634,7 @@ static int mcf_probe(struct platform_device *pdev)
 		port->ops = &mcf_uart_ops;
 		port->flags = UPF_BOOT_AUTOCONF;
 		port->rs485_config = mcf_config_rs485;
-		port->rs485_supported = &mcf_rs485_supported;
+		port->rs485_supported = mcf_rs485_supported;
 		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MCF_CONSOLE);
 
 		uart_add_one_port(&mcf_driver, port);

drivers/tty/serial/omap-serial.c

@@ -1643,7 +1643,7 @@ static int serial_omap_probe(struct platform_device *pdev)
 	up->port.flags = omap_up_info->flags;
 	up->port.uartclk = omap_up_info->uartclk;
 	up->port.rs485_config = serial_omap_config_rs485;
-	up->port.rs485_supported = &serial_omap_rs485_supported;
+	up->port.rs485_supported = serial_omap_rs485_supported;
 	if (!up->port.uartclk) {
 		up->port.uartclk = DEFAULT_CLK_SPEED;
 		dev_warn(&pdev->dev,

drivers/tty/serial/sc16is7xx.c

@@ -1461,7 +1461,7 @@ static int sc16is7xx_probe(struct device *dev,
 		s->p[i].port.iotype	= UPIO_PORT;
 		s->p[i].port.uartclk	= freq;
 		s->p[i].port.rs485_config = sc16is7xx_config_rs485;
-		s->p[i].port.rs485_supported = &sc16is7xx_rs485_supported;
+		s->p[i].port.rs485_supported = sc16is7xx_rs485_supported;
 		s->p[i].port.ops	= &sc16is7xx_ops;
 		s->p[i].old_mctrl	= 0;
 		s->p[i].port.line	= sc16is7xx_alloc_line();

drivers/tty/serial/serial_core.c

@@ -1285,7 +1285,7 @@ static int uart_check_rs485_flags(struct uart_port *port, struct serial_rs485 *r
 	 * For any bit outside of the legacy ones that is not supported by
 	 * the driver, return -EINVAL.
 	 */
-	if (flags & ~port->rs485_supported->flags)
+	if (flags & ~port->rs485_supported.flags)
 		return -EINVAL;
 
 	/* Asking for address w/o addressing mode? */
@@ -1304,7 +1304,7 @@ static int uart_check_rs485_flags(struct uart_port *port, struct serial_rs485 *r
 
 static void uart_sanitize_serial_rs485(struct uart_port *port, struct serial_rs485 *rs485)
 {
-	u32 supported_flags = port->rs485_supported->flags;
+	u32 supported_flags = port->rs485_supported.flags;
 
 	if (!(rs485->flags & SER_RS485_ENABLED)) {
 		memset(rs485, 0, sizeof(*rs485));
@@ -1323,7 +1323,7 @@ static void uart_sanitize_serial_rs485(struct uart_port *port, struct serial_rs4
 		supported_flags |= SER_RS485_RTS_ON_SEND|SER_RS485_RTS_AFTER_SEND;
 	}
 
-	if (!port->rs485_supported->delay_rts_before_send) {
+	if (!port->rs485_supported.delay_rts_before_send) {
 		if (rs485->delay_rts_before_send) {
 			dev_warn_ratelimited(port->dev,
 				"%s (%d): RTS delay before sending not supported\n",
@@ -1337,7 +1337,7 @@ static void uart_sanitize_serial_rs485(struct uart_port *port, struct serial_rs4
 			port->name, port->line, rs485->delay_rts_before_send);
 	}
 
-	if (!port->rs485_supported->delay_rts_after_send) {
+	if (!port->rs485_supported.delay_rts_after_send) {
 		if (rs485->delay_rts_after_send) {
 			dev_warn_ratelimited(port->dev,
 				"%s (%d): RTS delay after sending not supported\n",

drivers/tty/serial/stm32-usart.c

@@ -1401,7 +1401,7 @@ static int stm32_usart_init_port(struct stm32_port *stm32port,
 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_STM32_CONSOLE);
 	port->irq = irq;
 	port->rs485_config = stm32_usart_config_rs485;
-	port->rs485_supported = &stm32_rs485_supported;
+	port->rs485_supported = stm32_rs485_supported;
 
 	ret = stm32_usart_init_rs485(port, pdev);
 	if (ret)

include/linux/serial_core.h

@@ -255,7 +255,7 @@ struct uart_port {
 	struct attribute_group	*attr_group;		/* port specific attributes */
 	const struct attribute_group **tty_groups;	/* all attributes (serial core use only) */
 	struct serial_rs485     rs485;
-	const struct serial_rs485	*rs485_supported;	/* Supported mask for serial_rs485 */
+	struct serial_rs485	rs485_supported;	/* Supported mask for serial_rs485 */
 	struct gpio_desc	*rs485_term_gpio;	/* enable RS485 bus termination */
 	struct serial_iso7816   iso7816;
 	void			*private_data;		/* generic platform data pointer */