mfd: update TMIO drivers to use the clock API

This patch updates the remaining two TMIO drivers to use the clock API
rather than callback hooks into platform code.

Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

4 files changed, 61 insertions, 31 deletions

diff --git a/drivers/mfd/t7l66xb.c b/drivers/mfd/t7l66xb.c
index 49a0fffc02af..9f7024c0f8ec 100644
--- a/drivers/mfd/t7l66xb.c
+++ b/drivers/mfd/t7l66xb.c
@@ -24,8 +24,10 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/err.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
@@ -56,6 +58,8 @@ struct t7l66xb {
         spinlock_t              lock;
 
         struct resource         rscr;
+        struct clk              *clk48m;
+        struct clk              *clk32k;
         int                     irq;
         int                     irq_base;
 };
@@ -65,13 +69,11 @@ struct t7l66xb {
 static int t7l66xb_mmc_enable(struct platform_device *mmc)
 {
         struct platform_device *dev = to_platform_device(mmc->dev.parent);
-        struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
         unsigned long flags;
         u8 dev_ctl;
 
-        if (pdata->enable_clk32k)
-                pdata->enable_clk32k(dev);
+        clk_enable(t7l66xb->clk32k);
 
         spin_lock_irqsave(&t7l66xb->lock, flags);
 
@@ -87,7 +89,6 @@ static int t7l66xb_mmc_enable(struct platform_device *mmc)
 static int t7l66xb_mmc_disable(struct platform_device *mmc)
 {
         struct platform_device *dev = to_platform_device(mmc->dev.parent);
-        struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
         unsigned long flags;
         u8 dev_ctl;
@@ -100,8 +101,7 @@ static int t7l66xb_mmc_disable(struct platform_device *mmc)
 
         spin_unlock_irqrestore(&t7l66xb->lock, flags);
 
-        if (pdata->disable_clk32k)
-                pdata->disable_clk32k(dev);
+        clk_disable(t7l66xb->clk32k);
 
         return 0;
 }
@@ -258,18 +258,22 @@ static void t7l66xb_detach_irq(struct platform_device *dev)
 #ifdef CONFIG_PM
 static int t7l66xb_suspend(struct platform_device *dev, pm_message_t state)
 {
+        struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
 
         if (pdata && pdata->suspend)
                 pdata->suspend(dev);
+        clk_disable(t7l66xb->clk48m);
 
         return 0;
 }
 
 static int t7l66xb_resume(struct platform_device *dev)
 {
+        struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
 
+        clk_enable(t7l66xb->clk48m);
         if (pdata && pdata->resume)
                 pdata->resume(dev);
 
@@ -309,6 +313,19 @@ static int t7l66xb_probe(struct platform_device *dev)
 
         t7l66xb->irq_base = pdata->irq_base;
 
+        t7l66xb->clk32k = clk_get(&dev->dev, "CLK_CK32K");
+        if (IS_ERR(t7l66xb->clk32k)) {
+                ret = PTR_ERR(t7l66xb->clk32k);
+                goto err_clk32k_get;
+        }
+
+        t7l66xb->clk48m = clk_get(&dev->dev, "CLK_CK48M");
+        if (IS_ERR(t7l66xb->clk48m)) {
+                ret = PTR_ERR(t7l66xb->clk48m);
+                clk_put(t7l66xb->clk32k);
+                goto err_clk48m_get;
+        }
+
         rscr = &t7l66xb->rscr;
         rscr->name = "t7l66xb-core";
         rscr->start = iomem->start;
@@ -325,6 +342,8 @@ static int t7l66xb_probe(struct platform_device *dev)
                 goto err_ioremap;
         }
 
+        clk_enable(t7l66xb->clk48m);
+
         if (pdata && pdata->enable)
                 pdata->enable(dev);
 
@@ -359,9 +378,13 @@ static int t7l66xb_probe(struct platform_device *dev)
         iounmap(t7l66xb->scr);
 err_ioremap:
         release_resource(&t7l66xb->rscr);
-err_noirq:
 err_request_scr:
         kfree(t7l66xb);
+        clk_put(t7l66xb->clk48m);
+err_clk48m_get:
+        clk_put(t7l66xb->clk32k);
+err_clk32k_get:
+err_noirq:
         return ret;
 }
 
@@ -372,7 +395,8 @@ static int t7l66xb_remove(struct platform_device *dev)
         int ret;
 
         ret = pdata->disable(dev);
-
+        clk_disable(t7l66xb->clk48m);
+        clk_put(t7l66xb->clk48m);
         t7l66xb_detach_irq(dev);
         iounmap(t7l66xb->scr);
         release_resource(&t7l66xb->rscr);
diff --git a/drivers/mfd/tc6387xb.c b/drivers/mfd/tc6387xb.c
index a22b21ac6cf8..43222c12fec1 100644
--- a/drivers/mfd/tc6387xb.c
+++ b/drivers/mfd/tc6387xb.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
@@ -24,18 +25,22 @@ enum {
 #ifdef CONFIG_PM
 static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
 {
-        struct tc6387xb_platform_data *pdata = platform_get_drvdata(dev);
+        struct clk *clk32k = platform_get_drvdata(dev);
+        struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
 
         if (pdata && pdata->suspend)
                 pdata->suspend(dev);
+        clk_disable(clk32k);
 
         return 0;
 }
 
 static int tc6387xb_resume(struct platform_device *dev)
 {
-        struct tc6387xb_platform_data *pdata = platform_get_drvdata(dev);
+        struct clk *clk32k = platform_get_drvdata(dev);
+        struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
 
+        clk_enable(clk32k);
         if (pdata && pdata->resume)
                 pdata->resume(dev);
 
@@ -51,10 +56,9 @@ static int tc6387xb_resume(struct platform_device *dev)
 static int tc6387xb_mmc_enable(struct platform_device *mmc)
 {
         struct platform_device *dev      = to_platform_device(mmc->dev.parent);
-        struct tc6387xb_platform_data *tc6387xb = dev->dev.platform_data;
+        struct clk *clk32k = platform_get_drvdata(dev);
 
-        if (tc6387xb->enable_clk32k)
-                tc6387xb->enable_clk32k(dev);
+        clk_enable(clk32k);
 
         return 0;
 }
@@ -62,10 +66,9 @@ static int tc6387xb_mmc_enable(struct platform_device *mmc)
 static int tc6387xb_mmc_disable(struct platform_device *mmc)
 {
         struct platform_device *dev      = to_platform_device(mmc->dev.parent);
-        struct tc6387xb_platform_data *tc6387xb = dev->dev.platform_data;
+        struct clk *clk32k = platform_get_drvdata(dev);
 
-        if (tc6387xb->disable_clk32k)
-                tc6387xb->disable_clk32k(dev);
+        clk_disable(clk32k);
 
         return 0;
 }
@@ -102,14 +105,14 @@ static struct mfd_cell tc6387xb_cells[] = {
 
 static int tc6387xb_probe(struct platform_device *dev)
 {
-        struct tc6387xb_platform_data *data = platform_get_drvdata(dev);
+        struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
         struct resource *iomem;
+        struct clk *clk32k;
         int irq, ret;
 
         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
         if (!iomem) {
-                ret = -EINVAL;
-                goto err_resource;
+                return -EINVAL;
         }
 
         ret  = platform_get_irq(dev, 0);
@@ -118,8 +121,15 @@ static int tc6387xb_probe(struct platform_device *dev)
         else
                 goto err_resource;
 
-        if (data && data->enable)
-                data->enable(dev);
+        clk32k = clk_get(&dev->dev, "CLK_CK32K");
+        if (IS_ERR(clk32k)) {
+                ret = PTR_ERR(clk32k);
+                goto err_resource;
+        }
+        platform_set_drvdata(dev, clk32k);
+
+        if (pdata && pdata->enable)
+                pdata->enable(dev);
 
         printk(KERN_INFO "Toshiba tc6387xb initialised\n");
 
@@ -134,18 +144,19 @@ static int tc6387xb_probe(struct platform_device *dev)
         if (!ret)
                 return 0;
 
+        clk_put(clk32k);
 err_resource:
         return ret;
 }
 
 static int tc6387xb_remove(struct platform_device *dev)
 {
-        struct tc6387xb_platform_data *data = platform_get_drvdata(dev);
-
-        if (data && data->disable)
-                data->disable(dev);
+        struct clk *clk32k = platform_get_drvdata(dev);
 
-        /* FIXME - free the resources! */
+        mfd_remove_devices(&dev->dev);
+        clk_disable(clk32k);
+        clk_put(clk32k);
+        platform_set_drvdata(dev, NULL);
 
         return 0;
 }
diff --git a/include/linux/mfd/t7l66xb.h b/include/linux/mfd/t7l66xb.h
index e83c7f2036f9..b4629818aea5 100644
--- a/include/linux/mfd/t7l66xb.h
+++ b/include/linux/mfd/t7l66xb.h
@@ -15,8 +15,6 @@
 #include <linux/mfd/tmio.h>
 
 struct t7l66xb_platform_data {
-        int (*enable_clk32k)(struct platform_device *dev);
-        void (*disable_clk32k)(struct platform_device *dev);
         int (*enable)(struct platform_device *dev);
         int (*disable)(struct platform_device *dev);
         int (*suspend)(struct platform_device *dev);
diff --git a/include/linux/mfd/tc6387xb.h b/include/linux/mfd/tc6387xb.h
index fa06e0610b8e..b4888209494a 100644
--- a/include/linux/mfd/tc6387xb.h
+++ b/include/linux/mfd/tc6387xb.h
@@ -11,9 +11,6 @@
 #define MFD_TC6387XB_H
 
 struct tc6387xb_platform_data {
-        int (*enable_clk32k)(struct platform_device *dev);
-        void (*disable_clk32k)(struct platform_device *dev);
-
         int (*enable)(struct platform_device *dev);
         int (*disable)(struct platform_device *dev);
         int (*suspend)(struct platform_device *dev);