diff options
| author | Nicolas Ferre <nicolas.ferre@atmel.com> | 2012-01-19 10:13:40 +0100 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2012-03-01 13:38:48 +0100 |
| commit | 3a61a5dae49bf3d1afb7f75c8acb3607f26565af (patch) | |
| tree | 53616025b0d6ff2af767b3f3ca62704774ce09e5 /drivers/misc/atmel_tclib.c | |
| parent | 298312971b2fe8b922a1a15e0a6f5b4da89677d8 (diff) | |
| download | lwn-3a61a5dae49bf3d1afb7f75c8acb3607f26565af.tar.gz lwn-3a61a5dae49bf3d1afb7f75c8acb3607f26565af.zip | |
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/atmel_tclib.c')
| -rw-r--r-- | drivers/misc/atmel_tclib.c | 27 |
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) |