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>

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);

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;
 }

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);

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);