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>

1 files changed, 21 insertions, 4 deletions

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 8d6cb745bd9..9e2162ebf1b 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);