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authorNicolas Ferre <nicolas.ferre@atmel.com>2012-01-19 10:13:40 +0100
committerNicolas Ferre <nicolas.ferre@atmel.com>2012-03-01 13:38:48 +0100
commit3a61a5dae49bf3d1afb7f75c8acb3607f26565af (patch)
tree53616025b0d6ff2af767b3f3ca62704774ce09e5 /drivers/misc
parent298312971b2fe8b922a1a15e0a6f5b4da89677d8 (diff)
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>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/atmel_tclib.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index 7a6512a148d4..de6dea7c5d52 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 @@ struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
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 @@ void atmel_tc_free(struct atmel_tc *tc)
}
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 int __init tc_probe(struct platform_device *pdev)
}
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)