diff options
Diffstat (limited to 'drivers/serial/serial_imx.c')
| -rw-r--r-- | drivers/serial/serial_imx.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/serial/serial_imx.c b/drivers/serial/serial_imx.c index 012ab028a1..96f67122cc 100644 --- a/drivers/serial/serial_imx.c +++ b/drivers/serial/serial_imx.c @@ -22,6 +22,8 @@ #include <malloc.h> #include <notifier.h> #include <io.h> +#include <linux/err.h> +#include <linux/clk.h> #define URXD0 0x0 /* Receiver Register */ #define URTX0 0x40 /* Transmitter Register */ @@ -170,16 +172,17 @@ struct imx_serial_priv { int baudrate; struct notifier_block notify; void __iomem *regs; + struct clk *clk; }; -static int imx_serial_reffreq(void __iomem *regs) +static int imx_serial_reffreq(struct imx_serial_priv *priv) { ulong rfdiv; - rfdiv = (readl(regs + UFCR) >> 7) & 7; + rfdiv = (readl(priv->regs + UFCR) >> 7) & 7; rfdiv = rfdiv < 6 ? 6 - rfdiv : 7; - return imx_get_uartclk() / rfdiv; + return clk_get_rate(priv->clk) / rfdiv; } /* @@ -209,7 +212,7 @@ static int imx_serial_init_port(struct console_device *cdev) writel(0xa81, regs + UFCR); #ifdef ONEMS - writel(imx_serial_reffreq(regs) / 1000, regs + ONEMS); + writel(imx_serial_reffreq(priv) / 1000, regs + ONEMS); #endif /* Enable FIFOs */ @@ -291,7 +294,7 @@ static int imx_serial_setbaudrate(struct console_device *cdev, int baudrate) /* Set the numerator value minus one of the BRM ratio */ writel((baudrate / 100) - 1, regs + UBIR); /* Set the denominator value minus one of the BRM ratio */ - writel((imx_serial_reffreq(regs) / 1600) - 1, regs + UBMR); + writel((imx_serial_reffreq(priv) / 1600) - 1, regs + UBMR); writel(ucr1, regs + UCR1); @@ -316,11 +319,18 @@ static int imx_serial_probe(struct device_d *dev) struct console_device *cdev; struct imx_serial_priv *priv; uint32_t val; + int ret; priv = xzalloc(sizeof(*priv)); cdev = &priv->cdev; dev->priv = priv; + priv->clk = clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); + goto err_free; + } + priv->regs = dev_request_mem_region(dev, 0); cdev->dev = dev; cdev->f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR; @@ -343,6 +353,11 @@ static int imx_serial_probe(struct device_d *dev) clock_register_client(&priv->notify); return 0; + +err_free: + free(priv); + + return ret; } static void imx_serial_remove(struct device_d *dev) |