From: rnayak@ti.com (Rajendra Nayak)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/3] OMAP4: clockdomain: Add wkup/sleep dependency support
Date: Mon, 7 Feb 2011 18:47:11 +0530 [thread overview]
Message-ID: <1297084631-27474-4-git-send-email-rnayak@ti.com> (raw)
In-Reply-To: <1297084631-27474-3-git-send-email-rnayak@ti.com>
Add OMAP4 platform specific implementation to support clkdm
wkup and sleep dependencies a.k.a static dependencies.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
---
arch/arm/mach-omap2/clockdomain44xx.c | 59 +++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/cm44xx.h | 1 +
2 files changed, 60 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/clockdomain44xx.c b/arch/arm/mach-omap2/clockdomain44xx.c
index c0ccc47..87e690f 100644
--- a/arch/arm/mach-omap2/clockdomain44xx.c
+++ b/arch/arm/mach-omap2/clockdomain44xx.c
@@ -12,8 +12,59 @@
* 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; cd++) {
+ if (!omap_chip_is(cd->omap_chip))
+ continue;
+
+ /* PRM accesses are slow, so minimize them */
+ 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 +119,14 @@ 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,
diff --git a/arch/arm/mach-omap2/cm44xx.h b/arch/arm/mach-omap2/cm44xx.h
index 48fc3f4..4d0cfd3 100644
--- a/arch/arm/mach-omap2/cm44xx.h
+++ b/arch/arm/mach-omap2/cm44xx.h
@@ -21,6 +21,7 @@
#include "cm.h"
#define OMAP4_CM_CLKSTCTRL 0x0000
+#define OMAP4_CM_STATICDEP 0x4
/* Function prototypes */
# ifndef __ASSEMBLER__
--
1.7.0.4
next prev parent reply other threads:[~2011-02-07 13:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-07 13:17 [PATCH 0/3] OMAP4 static dependency support Rajendra Nayak
2011-02-07 13:17 ` [PATCH 1/3] OMAP4: clockdomain: Add clkdm static dependency srcs Rajendra Nayak
2011-02-07 13:17 ` [PATCH 2/3] OMAP4: CM: Add CM accesor api for bitwise control Rajendra Nayak
2011-02-07 13:17 ` Rajendra Nayak [this message]
2011-02-08 23:52 ` [PATCH 3/3] OMAP4: clockdomain: Add wkup/sleep dependency support Paul Walmsley
2011-02-11 2:06 ` Paul Walmsley
2011-02-11 4:04 ` Rajendra Nayak
2011-02-11 4:37 ` Paul Walmsley
2011-02-11 5:04 ` Rajendra Nayak
2011-02-11 5:14 ` Paul Walmsley
2011-02-11 5:21 ` Rajendra Nayak
2011-02-12 22:56 ` Paul Walmsley
2011-02-14 12:12 ` Rajendra Nayak
2011-02-14 16:48 ` Paul Walmsley
2011-02-12 23:07 ` Paul Walmsley
2011-02-08 23:49 ` [PATCH 0/3] OMAP4 static " Paul Walmsley
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