Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / drivers / misc / atmel_tclib.c

diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index c8d8e38..0ca05c3 100644 (file)
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -35,60 +35,31 @@ static LIST_HEAD(tc_list);
 /**
  * atmel_tc_alloc - allocate a specified TC block
  * @block: which block to allocate
- * @name: name to be associated with the iomem resource
  *
  * Caller allocates a block.  If it is available, a pointer to a
  * pre-initialized struct atmel_tc is returned. The caller can access
  * the registers directly through the "regs" field.
  */
-struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
+struct atmel_tc *atmel_tc_alloc(unsigned block)
 {
        struct atmel_tc         *tc;
        struct platform_device  *pdev = NULL;
-       struct resource         *r;
-       size_t                  size;
 
        spin_lock(&tc_list_lock);
        list_for_each_entry(tc, &tc_list, node) {
-               if (tc->pdev->dev.of_node) {
-                       if (of_alias_get_id(tc->pdev->dev.of_node, "tcb")
-                                       == block) {
-                               pdev = tc->pdev;
-                               break;
-                       }
-               } else if (tc->pdev->id == block) {
+               if (tc->allocated)
+                       continue;
+
+               if ((tc->pdev->dev.of_node && tc->id == block) ||
+                   (tc->pdev->id == block)) {
                        pdev = tc->pdev;
+                       tc->allocated = true;
                        break;
                }
        }
-
-       if (!pdev || tc->iomem)
-               goto fail;
-
-       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!r)
-               goto fail;
-
-       size = resource_size(r);
-       r = request_mem_region(r->start, size, name);
-       if (!r)
-               goto fail;
-
-       tc->regs = ioremap(r->start, size);
-       if (!tc->regs)
-               goto fail_ioremap;
-
-       tc->iomem = r;
-
-out:
        spin_unlock(&tc_list_lock);
-       return tc;
 
-fail_ioremap:
-       release_mem_region(r->start, size);
-fail:
-       tc = NULL;
-       goto out;
+       return pdev ? tc : NULL;
 }
 EXPORT_SYMBOL_GPL(atmel_tc_alloc);
 
@@ -96,19 +67,14 @@ EXPORT_SYMBOL_GPL(atmel_tc_alloc);
  * atmel_tc_free - release a specified TC block
  * @tc: Timer/counter block that was returned by atmel_tc_alloc()
  *
- * This reverses the effect of atmel_tc_alloc(), unmapping the I/O
- * registers, invalidating the resource returned by that routine and
- * making the TC available to other drivers.
+ * This reverses the effect of atmel_tc_alloc(), invalidating the resource
+ * returned by that routine and making the TC available to other drivers.
  */
 void atmel_tc_free(struct atmel_tc *tc)
 {
        spin_lock(&tc_list_lock);
-       if (tc->regs) {
-               iounmap(tc->regs);
-               release_mem_region(tc->iomem->start, resource_size(tc->iomem));
-               tc->regs = NULL;
-               tc->iomem = NULL;
-       }
+       if (tc->allocated)
+               tc->allocated = false;
        spin_unlock(&tc_list_lock);
 }
 EXPORT_SYMBOL_GPL(atmel_tc_free);
@@ -142,25 +108,27 @@ static int __init tc_probe(struct platform_device *pdev)
        struct atmel_tc *tc;
        struct clk      *clk;
        int             irq;
-
-       if (!platform_get_resource(pdev, IORESOURCE_MEM, 0))
-               return -EINVAL;
+       struct resource *r;
+       unsigned int    i;
 
        irq = platform_get_irq(pdev, 0);
        if (irq < 0)
                return -EINVAL;
 
-       tc = kzalloc(sizeof(struct atmel_tc), GFP_KERNEL);
+       tc = devm_kzalloc(&pdev->dev, sizeof(struct atmel_tc), GFP_KERNEL);
        if (!tc)
                return -ENOMEM;
 
        tc->pdev = pdev;
 
-       clk = clk_get(&pdev->dev, "t0_clk");
-       if (IS_ERR(clk)) {
-               kfree(tc);
-               return -EINVAL;
-       }
+       clk = devm_clk_get(&pdev->dev, "t0_clk");
+       if (IS_ERR(clk))
+               return PTR_ERR(clk);
+
+       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       tc->regs = devm_ioremap_resource(&pdev->dev, r);
+       if (IS_ERR(tc->regs))
+               return PTR_ERR(tc->regs);
 
        /* Now take SoC information if available */
        if (pdev->dev.of_node) {
@@ -168,13 +136,17 @@ static int __init tc_probe(struct platform_device *pdev)
                match = of_match_node(atmel_tcb_dt_ids, pdev->dev.of_node);
                if (match)
                        tc->tcb_config = match->data;
+
+               tc->id = of_alias_get_id(tc->pdev->dev.of_node, "tcb");
+       } else {
+               tc->id = pdev->id;
        }
 
        tc->clk[0] = clk;
-       tc->clk[1] = clk_get(&pdev->dev, "t1_clk");
+       tc->clk[1] = devm_clk_get(&pdev->dev, "t1_clk");
        if (IS_ERR(tc->clk[1]))
                tc->clk[1] = clk;
-       tc->clk[2] = clk_get(&pdev->dev, "t2_clk");
+       tc->clk[2] = devm_clk_get(&pdev->dev, "t2_clk");
        if (IS_ERR(tc->clk[2]))
                tc->clk[2] = clk;
 
@@ -186,18 +158,33 @@ static int __init tc_probe(struct platform_device *pdev)
        if (tc->irq[2] < 0)
                tc->irq[2] = irq;
 
+       for (i = 0; i < 3; i++)
+               writel(ATMEL_TC_ALL_IRQ, tc->regs + ATMEL_TC_REG(i, IDR));
+
        spin_lock(&tc_list_lock);
        list_add_tail(&tc->node, &tc_list);
        spin_unlock(&tc_list_lock);
 
+       platform_set_drvdata(pdev, tc);
+
        return 0;
 }
 
+static void tc_shutdown(struct platform_device *pdev)
+{
+       int i;
+       struct atmel_tc *tc = platform_get_drvdata(pdev);
+
+       for (i = 0; i < 3; i++)
+               writel(ATMEL_TC_ALL_IRQ, tc->regs + ATMEL_TC_REG(i, IDR));
+}
+
 static struct platform_driver tc_driver = {
        .driver = {
                .name   = "atmel_tcb",
                .of_match_table = of_match_ptr(atmel_tcb_dt_ids),
        },
+       .shutdown = tc_shutdown,
 };
 
 static int __init tc_init(void)