diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2008-07-05 10:02:46 +0200 |
|---|---|---|
| committer | Robert Schwebel <r.schwebel@pengutronix.de> | 2008-07-05 10:02:46 +0200 |
| commit | 38a41fdf94c449c165213e4665c3f8a0d30f8aba (patch) | |
| tree | cde7f6c0da8c9877736a6b66f245e163fa21c2f7 /drivers/serial | |
| parent | IMX UART: remove statically initialized tables (diff) | |
| download | linux-38a41fdf94c449c165213e4665c3f8a0d30f8aba.tar.xz linux-38a41fdf94c449c165213e4665c3f8a0d30f8aba.zip | |
IMX: introduce clock API
This patch introduces the clock API for i.MX and converts all
in-Kernel drivers to use it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/imx.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 8d6cb745bd93..9e2162ebf1bb 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -40,6 +40,7 @@ #include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/serial.h> +#include <linux/clk.h> #include <asm/io.h> #include <asm/irq.h> @@ -184,6 +185,7 @@ struct imx_port { unsigned int old_status; int txirq,rxirq,rtsirq; int have_rtscts:1; + struct clk *clk; }; /* @@ -479,7 +481,8 @@ static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode) * RFDIV is set such way to satisfy requested uartclk value */ val = TXTL << 10 | RXTL; - ufcr_rfdiv = (imx_get_perclk1() + sport->port.uartclk / 2) / sport->port.uartclk; + ufcr_rfdiv = (clk_get_rate(sport->clk) + sport->port.uartclk / 2) + / sport->port.uartclk; if(!ufcr_rfdiv) ufcr_rfdiv = 1; @@ -916,7 +919,7 @@ imx_console_get_options(struct imx_port *sport, int *baud, else ucfr_rfdiv = 6 - ucfr_rfdiv; - uartclk = imx_get_perclk1(); + uartclk = clk_get_rate(sport->clk); uartclk /= ucfr_rfdiv; { /* @@ -1054,7 +1057,15 @@ static int serial_imx_probe(struct platform_device *pdev) init_timer(&sport->timer); sport->timer.function = imx_timeout; sport->timer.data = (unsigned long)sport; - sport->port.uartclk = imx_get_perclk1(); + + sport->clk = clk_get(&pdev->dev, "uart_clk"); + if (IS_ERR(sport->clk)) { + ret = PTR_ERR(sport->clk); + goto unmap; + } + clk_enable(sport->clk); + + sport->port.uartclk = clk_get_rate(sport->clk); imx_ports[pdev->id] = sport; @@ -1069,6 +1080,8 @@ static int serial_imx_probe(struct platform_device *pdev) platform_set_drvdata(pdev, &sport->port); return 0; +unmap: + iounmap(sport->port.membase); free: kfree(sport); @@ -1084,8 +1097,12 @@ static int serial_imx_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); - if (sport) + if (sport) { uart_remove_one_port(&imx_reg, &sport->port); + clk_put(sport->clk); + } + + clk_disable(sport->clk); if (pdata->exit) pdata->exit(pdev); |