On Wed, Jul 29, 2015 at 5:58 PM, Shenwei Wang
<shenwei.wang@xxxxxxxxxxxxx> wrote:
> +static int imx_serial_port_suspend_noirq(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct imx_port *sport = platform_get_drvdata(pdev);
> +
> + /* Save necessary regs */
> + clk_enable(sport->clk_ipg);
clk_enable() may fail, so you should check its return value.
> + sport->saved_reg[0] = readl(sport->port.membase + UCR1);
> + sport->saved_reg[1] = readl(sport->port.membase + UCR2);
> + sport->saved_reg[2] = readl(sport->port.membase + UCR3);
> + sport->saved_reg[3] = readl(sport->port.membase + UCR4);
> + sport->saved_reg[4] = readl(sport->port.membase + UFCR);
> + sport->saved_reg[5] = readl(sport->port.membase + UESC);
> + sport->saved_reg[6] = readl(sport->port.membase + UTIM);
> + sport->saved_reg[7] = readl(sport->port.membase + UBIR);
> + sport->saved_reg[8] = readl(sport->port.membase + UBMR);
> + sport->saved_reg[9] = readl(sport->port.membase + IMX21_UTS);
> + clk_disable(sport->clk_ipg);
> +
> + dev_dbg(dev, "0x%p (%d)\r\n", sport->port.membase, sport->port.line);
> +
> + return 0;
> +}
> +
> +static int imx_serial_port_resume_noirq(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct imx_port *sport = platform_get_drvdata(pdev);
> +
> + clk_enable(sport->clk_ipg);
Same here.
> + writel(sport->saved_reg[4], sport->port.membase + UFCR);
> + writel(sport->saved_reg[5], sport->port.membase + UESC);
> + writel(sport->saved_reg[6], sport->port.membase + UTIM);
> + writel(sport->saved_reg[7], sport->port.membase + UBIR);
> + writel(sport->saved_reg[8], sport->port.membase + UBMR);
> + writel(sport->saved_reg[9], sport->port.membase + IMX21_UTS);
> + writel(sport->saved_reg[0], sport->port.membase + UCR1);
> + writel(sport->saved_reg[1] | 0x1, sport->port.membase + UCR2);
Why this magic '| 0x1'? Can't you use a define instead?
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
