ARM: at91/tc: add device tree support to atmel_tclib
Device tree support added to atmel_tclib: the generic Timer Counter
library. This is used by the clocksource/clockevent driver tcb_clksrc.
The current DT enabled platforms are also modified to use it:
- .dtsi files are modified to add Timer Counter Block entries
- alias are created to allow identification of each block
- clkdev lookup tables are added for clocks identification.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index 7a6512a..de6dea7 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -6,8 +6,10 @@
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
+#include <linux/module.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/of.h>
/*
* This is a thin library to solve the problem of how to portably allocate
@@ -48,7 +50,13 @@
spin_lock(&tc_list_lock);
list_for_each_entry(tc, &tc_list, node) {
- if (tc->pdev->id == block) {
+ 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) {
pdev = tc->pdev;
break;
}
@@ -105,6 +113,18 @@
}
EXPORT_SYMBOL_GPL(atmel_tc_free);
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_tcb_dt_ids[] = {
+ {
+ .compatible = "atmel,at91rm9200-tcb",
+ }, {
+ /* sentinel */
+ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_tcb_dt_ids);
+#endif
+
static int __init tc_probe(struct platform_device *pdev)
{
struct atmel_tc *tc;
@@ -154,7 +174,10 @@
}
static struct platform_driver tc_driver = {
- .driver.name = "atmel_tcb",
+ .driver = {
+ .name = "atmel_tcb",
+ .of_match_table = of_match_ptr(atmel_tcb_dt_ids),
+ },
};
static int __init tc_init(void)