OMAP: powerdomain: Arch specific funcs for mem control

Define the following architecture specific funtions for omap2/3/4
.pwrdm_set_mem_onst
.pwrdm_set_mem_retst
.pwrdm_read_mem_pwrst
.pwrdm_read_prev_mem_pwrst
.pwrdm_read_mem_retst
.pwrdm_clear_all_prev_pwrst
.pwrdm_enable_hdwr_sar
.pwrdm_disable_hdwr_sar
.pwrdm_wait_transition
.pwrdm_set_lowpwrstchange

Convert the platform-independent framework to call these functions.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: rearranged Makefile changes]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/powerdomain44xx.c b/arch/arm/mach-omap2/powerdomain44xx.c
index 996790acebc9..123a25f3b96f 100644
--- a/arch/arm/mach-omap2/powerdomain44xx.c
+++ b/arch/arm/mach-omap2/powerdomain44xx.c
@@ -47,6 +47,14 @@ static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
 				OMAP4430_LASTPOWERSTATEENTERED_MASK);
 }
 
+static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+	prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
+				(1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
+				pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
+	return 0;
+}
+
 static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
 {
 	u32 v;
@@ -58,6 +66,32 @@ static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
 	return 0;
 }
 
+static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
+								u8 pwrst)
+{
+	u32 m;
+
+	m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);
+
+	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
+				OMAP4_PM_PWSTCTRL);
+
+	return 0;
+}
+
+static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
+								u8 pwrst)
+{
+	u32 m;
+
+	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
+
+	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
+				OMAP4_PM_PWSTCTRL);
+
+	return 0;
+}
+
 static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
 {
 	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
@@ -70,12 +104,63 @@ static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
 				OMAP4430_LOGICRETSTATE_MASK);
 }
 
+static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+	u32 m;
+
+	m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
+
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST, m);
+}
+
+static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
+{
+	u32 m;
+
+	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
+
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL, m);
+}
+
+static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
+{
+	u32 c = 0;
+
+	/*
+	 * REVISIT: pwrdm_wait_transition() may be better implemented
+	 * via a callback and a periodic timer check -- how long do we expect
+	 * powerdomain transitions to take?
+	 */
+
+	/* XXX Is this udelay() value meaningful? */
+	while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP4_PM_PWSTST) &
+		OMAP_INTRANSITION_MASK) &&
+		(c++ < PWRDM_TRANSITION_BAILOUT))
+			udelay(1);
+
+	if (c > PWRDM_TRANSITION_BAILOUT) {
+		printk(KERN_ERR "powerdomain: waited too long for "
+			"powerdomain %s to complete transition\n", pwrdm->name);
+		return -EAGAIN;
+	}
+
+	pr_debug("powerdomain: completed transition in %d loops\n", c);
+
+	return 0;
+}
+
 struct pwrdm_ops omap4_pwrdm_operations = {
 	.pwrdm_set_next_pwrst	= omap4_pwrdm_set_next_pwrst,
 	.pwrdm_read_next_pwrst	= omap4_pwrdm_read_next_pwrst,
 	.pwrdm_read_pwrst	= omap4_pwrdm_read_pwrst,
 	.pwrdm_read_prev_pwrst	= omap4_pwrdm_read_prev_pwrst,
+	.pwrdm_set_lowpwrstchange	= omap4_pwrdm_set_lowpwrstchange,
 	.pwrdm_set_logic_retst	= omap4_pwrdm_set_logic_retst,
 	.pwrdm_read_logic_pwrst	= omap4_pwrdm_read_logic_pwrst,
 	.pwrdm_read_logic_retst	= omap4_pwrdm_read_logic_retst,
+	.pwrdm_read_mem_pwrst	= omap4_pwrdm_read_mem_pwrst,
+	.pwrdm_read_mem_retst	= omap4_pwrdm_read_mem_retst,
+	.pwrdm_set_mem_onst	= omap4_pwrdm_set_mem_onst,
+	.pwrdm_set_mem_retst	= omap4_pwrdm_set_mem_retst,
+	.pwrdm_wait_transition	= omap4_pwrdm_wait_transition,
 };