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ARM: OMAP4+: PRM: register interrupt information from DT 

Allow the PRM interrupt information to be picked up from device tree.
the only exception is for OMAP4 which uses values pre-populated and allows
compatibility with older dtb.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
This commit is contained in:
Nishanth Menon 2014-05-22 15:19:29 -05:00
parent 390ddc19e2
commit a8f83aefcd
1 changed files with 40 additions and 0 deletions
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40
arch/arm/mach-omap2/prm44xx.c
View File

@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of_irq.h>
#include "soc.h"
@ -699,11 +700,50 @@ int __init omap44xx_prm_init(void)
return prm_register(&omap44xx_prm_ll_data);
}
static struct of_device_id omap_prm_dt_match_table[] = {
{ .compatible = "ti,omap4-prm" },
{ .compatible = "ti,omap5-prm" },
{ .compatible = "ti,dra7-prm" },
{ }
};
static int omap44xx_prm_late_init(void)
{
struct device_node *np;
int irq_num;
if (!(prm_features & PRM_HAS_IO_WAKEUP))
return 0;
/* OMAP4+ is DT only now */
if (!of_have_populated_dt())
return 0;
np = of_find_matching_node(NULL, omap_prm_dt_match_table);
if (!np) {
/* Default loaded up with OMAP4 values */
if (!cpu_is_omap44xx())
return 0;
} else {
irq_num = of_irq_get(np, 0);
/*
* Already have OMAP4 IRQ num. For all other platforms, we need
* IRQ numbers from DT
*/
if (irq_num < 0 && !cpu_is_omap44xx()) {
if (irq_num == -EPROBE_DEFER)
return irq_num;
/* Have nothing to do */
return 0;
}
/* Once OMAP4 DT is filled as well */
if (irq_num >= 0)
omap4_prcm_irq_setup.irq = irq_num;
}
omap44xx_prm_enable_io_wakeup();
return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);