Commit 15b08d93 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Paul Walmsley
Browse files

OMAP4: clockdomain: Add wkup/sleep dependency support 



Add OMAP4 platform specific implementation to support clkdm
wkup and sleep dependencies a.k.a static dependencies.

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: removed comment about PRM; zero-prefixed STATICDEP
 register offset; fixed loop termination condition in
 omap4_clkdm_clear_all_wkup_sleep_deps(); thanks to Kevin Hilman for finding
 and helping fix this bug]
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
parent 04eb7773

arch/arm/mach-omap2/clockdomain44xx.c

+60 −0
Original line number Diff line number Diff line
@@ -12,8 +12,60 @@ 
 * published by the Free Software Foundation.

 */



#include <linux/kernel.h>

#include "clockdomain.h"

#include "cminst44xx.h"

#include "cm44xx.h"



static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1,

					struct clockdomain *clkdm2)

{

	omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit),

					clkdm1->prcm_partition,

					clkdm1->cm_inst, clkdm1->clkdm_offs +

					OMAP4_CM_STATICDEP);

	return 0;

}



static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1,

					struct clockdomain *clkdm2)

{

	omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit),

					clkdm1->prcm_partition,

					clkdm1->cm_inst, clkdm1->clkdm_offs +

					OMAP4_CM_STATICDEP);

	return 0;

}



static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1,

					struct clockdomain *clkdm2)

{

	return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition,

					clkdm1->cm_inst, clkdm1->clkdm_offs +

					OMAP4_CM_STATICDEP,

					(1 << clkdm2->dep_bit));

}



static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)

{

	struct clkdm_dep *cd;

	u32 mask = 0;



	for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {

		if (!omap_chip_is(cd->omap_chip))

			continue;

		if (!cd->clkdm)

			continue; /* only happens if data is erroneous */



		mask |= 1 << cd->clkdm->dep_bit;

		atomic_set(&cd->wkdep_usecount, 0);

	}



	omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition,

					clkdm->cm_inst, clkdm->clkdm_offs +

					OMAP4_CM_STATICDEP);

	return 0;

}



static int omap4_clkdm_sleep(struct clockdomain *clkdm)

{
@@ -68,6 +120,14 @@ static int omap4_clkdm_clk_disable(struct clockdomain *clkdm) 
}



struct clkdm_ops omap4_clkdm_operations = {

	.clkdm_add_wkdep	= omap4_clkdm_add_wkup_sleep_dep,

	.clkdm_del_wkdep	= omap4_clkdm_del_wkup_sleep_dep,

	.clkdm_read_wkdep	= omap4_clkdm_read_wkup_sleep_dep,

	.clkdm_clear_all_wkdeps	= omap4_clkdm_clear_all_wkup_sleep_deps,

	.clkdm_add_sleepdep	= omap4_clkdm_add_wkup_sleep_dep,

	.clkdm_del_sleepdep	= omap4_clkdm_del_wkup_sleep_dep,

	.clkdm_read_sleepdep	= omap4_clkdm_read_wkup_sleep_dep,

	.clkdm_clear_all_sleepdeps	= omap4_clkdm_clear_all_wkup_sleep_deps,

	.clkdm_sleep		= omap4_clkdm_sleep,

	.clkdm_wakeup		= omap4_clkdm_wakeup,

	.clkdm_allow_idle	= omap4_clkdm_allow_idle,

arch/arm/mach-omap2/cm44xx.h

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include "cm.h"



#define OMAP4_CM_CLKSTCTRL				0x0000

#define OMAP4_CM_STATICDEP				0x0004



/* Function prototypes */

# ifndef __ASSEMBLER__

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