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path: root/drivers/tty/serial/samsung.c
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Diffstat (limited to 'drivers/tty/serial/samsung.c')
-rw-r--r--drivers/tty/serial/samsung.c46
1 files changed, 25 insertions, 21 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 02d07bfcfa8..bdaa06f3ab6 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -82,7 +82,7 @@ static inline const char *s3c24xx_serial_portname(struct uart_port *port)
static int s3c24xx_serial_txempty_nofifo(struct uart_port *port)
{
- return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE);
+ return rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE;
}
/*
@@ -268,7 +268,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
dbg("break!\n");
port->icount.brk++;
if (uart_handle_break(port))
- goto ignore_char;
+ goto ignore_char;
}
if (uerstat & S3C2410_UERSTAT_FRAME)
@@ -459,7 +459,7 @@ static int s3c24xx_serial_startup(struct uart_port *port)
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
- printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq);
+ dev_err(port->dev, "cannot get irq %d\n", ourport->rx_irq);
return ret;
}
@@ -473,7 +473,7 @@ static int s3c24xx_serial_startup(struct uart_port *port)
s3c24xx_serial_portname(port), ourport);
if (ret) {
- printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq);
+ dev_err(port->dev, "cannot get irq %d\n", ourport->tx_irq);
goto err;
}
@@ -502,7 +502,7 @@ static int s3c64xx_serial_startup(struct uart_port *port)
ret = request_irq(port->irq, s3c64xx_serial_handle_irq, IRQF_SHARED,
s3c24xx_serial_portname(port), ourport);
if (ret) {
- printk(KERN_ERR "cannot get irq %d\n", port->irq);
+ dev_err(port->dev, "cannot get irq %d\n", port->irq);
return ret;
}
@@ -529,7 +529,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
switch (level) {
case 3:
- if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
+ if (!IS_ERR(ourport->baudclk))
clk_disable(ourport->baudclk);
clk_disable(ourport->clk);
@@ -538,12 +538,12 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
case 0:
clk_enable(ourport->clk);
- if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
+ if (!IS_ERR(ourport->baudclk))
clk_enable(ourport->baudclk);
break;
default:
- printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level);
+ dev_err(port->dev, "s3c24xx_serial: unknown pm %d\n", level);
}
}
@@ -604,7 +604,6 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
char clkname[MAX_CLK_NAME_LENGTH];
int calc_deviation, deviation = (1 << 30) - 1;
- *best_clk = NULL;
clk_sel = (ourport->cfg->clk_sel) ? ourport->cfg->clk_sel :
ourport->info->def_clk_sel;
for (cnt = 0; cnt < info->num_clks; cnt++) {
@@ -613,7 +612,7 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
sprintf(clkname, "clk_uart_baud%d", cnt);
clk = clk_get(ourport->port.dev, clkname);
- if (IS_ERR_OR_NULL(clk))
+ if (IS_ERR(clk))
continue;
rate = clk_get_rate(clk);
@@ -684,7 +683,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
{
struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
struct s3c24xx_uart_port *ourport = to_ourport(port);
- struct clk *clk = NULL;
+ struct clk *clk = ERR_PTR(-EINVAL);
unsigned long flags;
unsigned int baud, quot, clk_sel = 0;
unsigned int ulcon;
@@ -705,7 +704,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
quot = s3c24xx_serial_getclk(ourport, baud, &clk, &clk_sel);
if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
quot = port->custom_divisor;
- if (!clk)
+ if (IS_ERR(clk))
return;
/* check to see if we need to change clock source */
@@ -713,9 +712,9 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
if (ourport->baudclk != clk) {
s3c24xx_serial_setsource(port, clk_sel);
- if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) {
+ if (!IS_ERR(ourport->baudclk)) {
clk_disable(ourport->baudclk);
- ourport->baudclk = NULL;
+ ourport->baudclk = ERR_PTR(-EINVAL);
}
clk_enable(clk);
@@ -1036,10 +1035,10 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
if (tty == NULL)
goto exit;
- termios = tty->termios;
+ termios = &tty->termios;
if (termios == NULL) {
- printk(KERN_WARNING "%s: no termios?\n", __func__);
+ dev_warn(uport->dev, "%s: no termios?\n", __func__);
goto exit;
}
@@ -1114,7 +1113,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
res = platform_get_resource(platdev, IORESOURCE_MEM, 0);
if (res == NULL) {
- printk(KERN_ERR "failed to find memory resource for uart\n");
+ dev_err(port->dev, "failed to find memory resource for uart\n");
return -EINVAL;
}
@@ -1130,7 +1129,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
ourport->rx_irq = ret;
ourport->tx_irq = ret + 1;
}
-
+
ret = platform_get_irq(platdev, 1);
if (ret > 0)
ourport->tx_irq = ret;
@@ -1160,7 +1159,11 @@ static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
struct uart_port *port = s3c24xx_dev_to_port(dev);
struct s3c24xx_uart_port *ourport = to_ourport(port);
- return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->baudclk->name);
+ if (IS_ERR(ourport->baudclk))
+ return -EINVAL;
+
+ return snprintf(buf, PAGE_SIZE, "* %s\n",
+ ourport->baudclk->name ?: "(null)");
}
static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL);
@@ -1200,6 +1203,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
return -ENODEV;
}
+ ourport->baudclk = ERR_PTR(-EINVAL);
ourport->info = ourport->drv_data->info;
ourport->cfg = (pdev->dev.platform_data) ?
(struct s3c2410_uartcfg *)pdev->dev.platform_data :
@@ -1387,7 +1391,7 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud,
sprintf(clk_name, "clk_uart_baud%d", clk_sel);
clk = clk_get(port->dev, clk_name);
- if (!IS_ERR(clk) && clk != NULL)
+ if (!IS_ERR(clk))
rate = clk_get_rate(clk);
else
rate = 1;
@@ -1679,7 +1683,7 @@ static int __init s3c24xx_serial_modinit(void)
ret = uart_register_driver(&s3c24xx_uart_drv);
if (ret < 0) {
- printk(KERN_ERR "failed to register UART driver\n");
+ pr_err("Failed to register Samsung UART driver\n");
return -1;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 04:20:39 +0000