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Commit 093a9e2a authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Greg Kroah-Hartman
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serial: clps711x: Enable driver compilation with COMPILE_TEST 



This helps increasing build testing coverage.
To do this, read{write}_relaxed() functions was be replaced with
simple read{write}() variants. Potential "uninitialized variable"
warnings was be fixed if driver compiled without MFD_SYSCON.

Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 71b9e8c6

drivers/tty/serial/Kconfig

+1 −2
Original line number Diff line number Diff line
@@ -181,9 +181,8 @@ config SERIAL_KS8695_CONSOLE 


config SERIAL_CLPS711X

	tristate "CLPS711X serial port support"

	depends on ARCH_CLPS711X

	depends on ARCH_CLPS711X || COMPILE_TEST

	select SERIAL_CORE

	default y

	help

	  This enables the driver for the on-chip UARTs of the Cirrus

	  Logic EP711x/EP721x/EP731x processors.

drivers/tty/serial/clps711x.c

+22 −18
Original line number Diff line number Diff line
@@ -99,15 +99,16 @@ static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id) 
	struct uart_port *port = dev_id;

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	unsigned int status, flg;

	u32 sysflg;

	u16 ch;



	for (;;) {

		u32 sysflg = 0;



		regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);

		if (sysflg & SYSFLG_URXFE)

			break;



		ch = readw_relaxed(port->membase + UARTDR_OFFSET);

		ch = readw(port->membase + UARTDR_OFFSET);

		status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR);

		ch &= 0xff;
@@ -151,10 +152,9 @@ static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) 
	struct uart_port *port = dev_id;

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	struct circ_buf *xmit = &port->state->xmit;

	u32 sysflg;



	if (port->x_char) {

		writew_relaxed(port->x_char, port->membase + UARTDR_OFFSET);

		writew(port->x_char, port->membase + UARTDR_OFFSET);

		port->icount.tx++;

		port->x_char = 0;

		return IRQ_HANDLED;
@@ -169,8 +169,9 @@ static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) 
	}



	while (!uart_circ_empty(xmit)) {

		writew_relaxed(xmit->buf[xmit->tail],

			       port->membase + UARTDR_OFFSET);

		u32 sysflg = 0;



		writew(xmit->buf[xmit->tail], port->membase + UARTDR_OFFSET);

		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);

		port->icount.tx++;
@@ -188,7 +189,7 @@ static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) 
static unsigned int uart_clps711x_tx_empty(struct uart_port *port)

{

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	u32 sysflg;

	u32 sysflg = 0;



	regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
@@ -199,9 +200,10 @@ static unsigned int uart_clps711x_get_mctrl(struct uart_port *port) 
{

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	unsigned int result = 0;

	u32 sysflg;



	if (s->use_ms) {

		u32 sysflg = 0;



		regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);

		if (sysflg & SYSFLG1_DCD)

			result |= TIOCM_CAR;
@@ -224,12 +226,12 @@ static void uart_clps711x_break_ctl(struct uart_port *port, int break_state) 
{

	unsigned int ubrlcr;



	ubrlcr = readl_relaxed(port->membase + UBRLCR_OFFSET);

	ubrlcr = readl(port->membase + UBRLCR_OFFSET);

	if (break_state)

		ubrlcr |= UBRLCR_BREAK;

	else

		ubrlcr &= ~UBRLCR_BREAK;

	writel_relaxed(ubrlcr, port->membase + UBRLCR_OFFSET);

	writel(ubrlcr, port->membase + UBRLCR_OFFSET);

}



static void uart_clps711x_set_ldisc(struct uart_port *port, int ld)
@@ -247,8 +249,8 @@ static int uart_clps711x_startup(struct uart_port *port) 
	struct clps711x_port *s = dev_get_drvdata(port->dev);



	/* Disable break */

	writel_relaxed(readl_relaxed(port->membase + UBRLCR_OFFSET) &

		       ~UBRLCR_BREAK, port->membase + UBRLCR_OFFSET);

	writel(readl(port->membase + UBRLCR_OFFSET) & ~UBRLCR_BREAK,

	       port->membase + UBRLCR_OFFSET);



	/* Enable the port */

	return regmap_update_bits(s->syscon, SYSCON_OFFSET,
@@ -320,7 +322,7 @@ static void uart_clps711x_set_termios(struct uart_port *port, 


	uart_update_timeout(port, termios->c_cflag, baud);



	writel_relaxed(ubrlcr | (quot - 1), port->membase + UBRLCR_OFFSET);

	writel(ubrlcr | (quot - 1), port->membase + UBRLCR_OFFSET);

}



static const char *uart_clps711x_type(struct uart_port *port)
@@ -366,13 +368,13 @@ static const struct uart_ops uart_clps711x_ops = { 
static void uart_clps711x_console_putchar(struct uart_port *port, int ch)

{

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	u32 sysflg;

	u32 sysflg = 0;



	do {

		regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);

	} while (sysflg & SYSFLG_UTXFF);



	writew_relaxed(ch, port->membase + UARTDR_OFFSET);

	writew(ch, port->membase + UARTDR_OFFSET);

}



static void uart_clps711x_console_write(struct console *co, const char *c,
@@ -380,7 +382,7 @@ static void uart_clps711x_console_write(struct console *co, const char *c, 
{

	struct uart_port *port = clps711x_uart.state[co->index].uart_port;

	struct clps711x_port *s = dev_get_drvdata(port->dev);

	u32 sysflg;

	u32 sysflg = 0;



	uart_console_write(port, c, n, uart_clps711x_console_putchar);
@@ -396,8 +398,8 @@ static int uart_clps711x_console_setup(struct console *co, char *options) 
	int ret, index = co->index;

	struct clps711x_port *s;

	struct uart_port *port;

	u32 ubrlcr, syscon;

	unsigned int quot;

	u32 ubrlcr;



	if (index < 0 || index >= UART_CLPS711X_NR)

		return -EINVAL;
@@ -409,9 +411,11 @@ static int uart_clps711x_console_setup(struct console *co, char *options) 
	s = dev_get_drvdata(port->dev);



	if (!options) {

		u32 syscon = 0;



		regmap_read(s->syscon, SYSCON_OFFSET, &syscon);

		if (syscon & SYSCON_UARTEN) {

			ubrlcr = readl_relaxed(port->membase + UBRLCR_OFFSET);

			ubrlcr = readl(port->membase + UBRLCR_OFFSET);



			if (ubrlcr & UBRLCR_PRTEN) {

				if (ubrlcr & UBRLCR_EVENPRT)