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serial: samsung: Remove NULL checking for baud clock
Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com> Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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4a055c9c9e
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@ -529,7 +529,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
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switch (level) {
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case 3:
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if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
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if (!IS_ERR(ourport->baudclk))
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clk_disable(ourport->baudclk);
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clk_disable(ourport->clk);
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@ -538,7 +538,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
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case 0:
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clk_enable(ourport->clk);
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if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
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if (!IS_ERR(ourport->baudclk))
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clk_enable(ourport->baudclk);
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break;
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@ -604,7 +604,6 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
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char clkname[MAX_CLK_NAME_LENGTH];
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int calc_deviation, deviation = (1 << 30) - 1;
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*best_clk = NULL;
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clk_sel = (ourport->cfg->clk_sel) ? ourport->cfg->clk_sel :
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ourport->info->def_clk_sel;
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for (cnt = 0; cnt < info->num_clks; cnt++) {
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@ -613,7 +612,7 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
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sprintf(clkname, "clk_uart_baud%d", cnt);
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clk = clk_get(ourport->port.dev, clkname);
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if (IS_ERR_OR_NULL(clk))
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if (IS_ERR(clk))
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continue;
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rate = clk_get_rate(clk);
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@ -684,7 +683,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
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{
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struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
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struct s3c24xx_uart_port *ourport = to_ourport(port);
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struct clk *clk = NULL;
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struct clk *clk = ERR_PTR(-EINVAL);
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unsigned long flags;
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unsigned int baud, quot, clk_sel = 0;
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unsigned int ulcon;
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@ -705,7 +704,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
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quot = s3c24xx_serial_getclk(ourport, baud, &clk, &clk_sel);
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if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
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quot = port->custom_divisor;
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if (!clk)
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if (IS_ERR(clk))
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return;
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/* check to see if we need to change clock source */
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@ -713,9 +712,9 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
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if (ourport->baudclk != clk) {
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s3c24xx_serial_setsource(port, clk_sel);
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if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) {
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if (!IS_ERR(ourport->baudclk)) {
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clk_disable(ourport->baudclk);
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ourport->baudclk = NULL;
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ourport->baudclk = ERR_PTR(-EINVAL);
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}
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clk_enable(clk);
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@ -1160,6 +1159,9 @@ static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
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struct uart_port *port = s3c24xx_dev_to_port(dev);
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struct s3c24xx_uart_port *ourport = to_ourport(port);
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if (IS_ERR(ourport->baudclk))
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return -EINVAL;
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return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->baudclk->name);
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}
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@ -1200,6 +1202,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
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return -ENODEV;
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}
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ourport->baudclk = ERR_PTR(-EINVAL);
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ourport->info = ourport->drv_data->info;
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ourport->cfg = (pdev->dev.platform_data) ?
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(struct s3c2410_uartcfg *)pdev->dev.platform_data :
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@ -1387,7 +1390,7 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud,
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sprintf(clk_name, "clk_uart_baud%d", clk_sel);
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clk = clk_get(port->dev, clk_name);
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if (!IS_ERR(clk) && clk != NULL)
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if (!IS_ERR(clk))
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rate = clk_get_rate(clk);
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else
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rate = 1;
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