clocksource/drivers/h8300: Cleanup startup and remove module code.
Remove some legacy code and replace it by the clksrc-of code.
Do some cleanup and code consolidation.
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/h8300_tpu.c b/drivers/clocksource/h8300_tpu.c
index 5487410..ed0b493 100644
--- a/drivers/clocksource/h8300_tpu.c
+++ b/drivers/clocksource/h8300_tpu.c
@@ -1,5 +1,5 @@
/*
- * H8/300 TPU Driver
+ * H8S TPU Driver
*
* Copyright 2015 Yoshinori Sato <ysato@users.sourcefoge.jp>
*
@@ -17,8 +17,8 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/of.h>
-
-#include <asm/irq.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#define TCR 0
#define TMDR 1
@@ -32,9 +32,7 @@
#define TGRD 14
struct tpu_priv {
- struct platform_device *pdev;
struct clocksource cs;
- struct clk *clk;
unsigned long mapbase1;
unsigned long mapbase2;
raw_spinlock_t lock;
@@ -116,91 +114,54 @@
p->cs_enabled = false;
}
+static struct tpu_priv tpu_priv = {
+ .cs = {
+ .name = "H8S_TPU",
+ .rating = 200,
+ .read = tpu_clocksource_read,
+ .enable = tpu_clocksource_enable,
+ .disable = tpu_clocksource_disable,
+ .mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+ },
+};
+
#define CH_L 0
#define CH_H 1
-static int __init tpu_setup(struct tpu_priv *p, struct platform_device *pdev)
+static void __init h8300_tpu_init(struct device_node *node)
{
- struct resource *res[2];
+ void __iomem *base[2];
+ struct clk *clk;
- p->pdev = pdev;
-
- res[CH_L] = platform_get_resource(p->pdev, IORESOURCE_MEM, CH_L);
- res[CH_H] = platform_get_resource(p->pdev, IORESOURCE_MEM, CH_H);
- if (!res[CH_L] || !res[CH_H]) {
- dev_err(&p->pdev->dev, "failed to get I/O memory\n");
- return -ENXIO;
+ clk = of_clk_get(node, 0);
+ if (IS_ERR(clk)) {
+ pr_err("failed to get clock for clocksource\n");
+ return;
}
- p->clk = clk_get(&p->pdev->dev, "fck");
- if (IS_ERR(p->clk)) {
- dev_err(&p->pdev->dev, "can't get clk\n");
- return PTR_ERR(p->clk);
+ base[CH_L] = of_iomap(node, CH_L);
+ if (!base[CH_L]) {
+ pr_err("failed to map registers for clocksource\n");
+ goto free_clk;
+ }
+ base[CH_H] = of_iomap(node, CH_H);
+ if (!base[CH_H]) {
+ pr_err("failed to map registers for clocksource\n");
+ goto unmap_L;
}
- p->mapbase1 = res[CH_L]->start;
- p->mapbase2 = res[CH_H]->start;
+ tpu_priv.mapbase1 = (unsigned long)base[CH_L];
+ tpu_priv.mapbase2 = (unsigned long)base[CH_H];
- p->cs.name = pdev->name;
- p->cs.rating = 200;
- p->cs.read = tpu_clocksource_read;
- p->cs.enable = tpu_clocksource_enable;
- p->cs.disable = tpu_clocksource_disable;
- p->cs.mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
- p->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
- clocksource_register_hz(&p->cs, clk_get_rate(p->clk) / 64);
- platform_set_drvdata(pdev, p);
+ clocksource_register_hz(&tpu_priv.cs, clk_get_rate(clk) / 64);
- return 0;
+ return;
+
+unmap_L:
+ iounmap(base[CH_H]);
+free_clk:
+ clk_put(clk);
}
-static int tpu_probe(struct platform_device *pdev)
-{
- struct tpu_priv *p = platform_get_drvdata(pdev);
-
- if (p) {
- dev_info(&pdev->dev, "kept as earlytimer\n");
- return 0;
- }
-
- p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
- if (!p)
- return -ENOMEM;
-
- return tpu_setup(p, pdev);
-}
-
-static int tpu_remove(struct platform_device *pdev)
-{
- return -EBUSY;
-}
-
-static const struct of_device_id tpu_of_table[] = {
- { .compatible = "renesas,tpu" },
- { }
-};
-
-static struct platform_driver tpu_driver = {
- .probe = tpu_probe,
- .remove = tpu_remove,
- .driver = {
- .name = "h8s-tpu",
- .of_match_table = of_match_ptr(tpu_of_table),
- }
-};
-
-static int __init tpu_init(void)
-{
- return platform_driver_register(&tpu_driver);
-}
-
-static void __exit tpu_exit(void)
-{
- platform_driver_unregister(&tpu_driver);
-}
-
-subsys_initcall(tpu_init);
-module_exit(tpu_exit);
-MODULE_AUTHOR("Yoshinori Sato");
-MODULE_DESCRIPTION("H8S Timer Pulse Unit Driver");
-MODULE_LICENSE("GPL v2");
+CLOCKSOURCE_OF_DECLARE(h8300_tpu, "renesas,tpu", h8300_tpu_init);