Merge tag 'omap-cleanup-a-for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.8/cleanup-prcm

The first set of OMAP PRM/CM-related cleanup patches for 3.8.
Prepares for the future move of the PRM/CM code to drivers/.  Also
includes some prcm.[ch] cleanup patches from the WDTIMER cleanup
series that don't need external acks.

Basic test logs for this branch on top of v3.7-rc2 are here:

http://www.pwsan.com/omap/testlogs/prcm_cleanup_a_3.8/20121021123719/

But due to the number of unrelated regressions present in v3.7-rc[12],
it's not particularly usable as a testing base.  With reverts, fixes,
and workarounds applied as documented in:

http://www.pwsan.com/omap/testlogs/test_v3.7-rc2/20121020134755/README.txt

the following test logs were obtained:

http://www.pwsan.com/omap/testlogs/prcm_cleanup_a_3.8/20121020231757/

which indicate that the series tests cleanly.

Conflicts:
	arch/arm/mach-omap2/Makefile
	arch/arm/mach-omap2/clockdomain2xxx_3xxx.c
	arch/arm/mach-omap2/pm24xx.c

1 files changed, 202 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c
index 624ade5c3c33..53ec9cbaa3d3 100644
--- a/arch/arm/mach-omap2/prm33xx.c
+++ b/arch/arm/mach-omap2/prm33xx.c
@@ -22,6 +22,7 @@
 #include "../plat-omap/common.h"
 
 #include "common.h"
+#include "powerdomain.h"
 #include "prm33xx.h"
 #include "prm-regbits-33xx.h"
 
@@ -133,3 +134,204 @@ int am33xx_prm_deassert_hardreset(u8 shift, s16 inst,
 
         return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0;
 }
+
+static int am33xx_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
+{
+        am33xx_prm_rmw_reg_bits(OMAP_POWERSTATE_MASK,
+                                (pwrst << OMAP_POWERSTATE_SHIFT),
+                                pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+        return 0;
+}
+
+static int am33xx_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
+{
+        u32 v;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs,  pwrdm->pwrstctrl_offs);
+        v &= OMAP_POWERSTATE_MASK;
+        v >>= OMAP_POWERSTATE_SHIFT;
+
+        return v;
+}
+
+static int am33xx_pwrdm_read_pwrst(struct powerdomain *pwrdm)
+{
+        u32 v;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+        v &= OMAP_POWERSTATEST_MASK;
+        v >>= OMAP_POWERSTATEST_SHIFT;
+
+        return v;
+}
+
+static int am33xx_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
+{
+        u32 v;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+        v &= AM33XX_LASTPOWERSTATEENTERED_MASK;
+        v >>= AM33XX_LASTPOWERSTATEENTERED_SHIFT;
+
+        return v;
+}
+
+static int am33xx_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+        am33xx_prm_rmw_reg_bits(AM33XX_LOWPOWERSTATECHANGE_MASK,
+                                (1 << AM33XX_LOWPOWERSTATECHANGE_SHIFT),
+                                pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+        return 0;
+}
+
+static int am33xx_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
+{
+        am33xx_prm_rmw_reg_bits(AM33XX_LASTPOWERSTATEENTERED_MASK,
+                                AM33XX_LASTPOWERSTATEENTERED_MASK,
+                                pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+        return 0;
+}
+
+static int am33xx_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
+{
+        u32 m;
+
+        m = pwrdm->logicretstate_mask;
+        if (!m)
+                return -EINVAL;
+
+        am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+                                pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+        return 0;
+}
+
+static int am33xx_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
+{
+        u32 v;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+        v &= AM33XX_LOGICSTATEST_MASK;
+        v >>= AM33XX_LOGICSTATEST_SHIFT;
+
+        return v;
+}
+
+static int am33xx_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
+{
+        u32 v, m;
+
+        m = pwrdm->logicretstate_mask;
+        if (!m)
+                return -EINVAL;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+        v &= m;
+        v >>= __ffs(m);
+
+        return v;
+}
+
+static int am33xx_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
+                u8 pwrst)
+{
+        u32 m;
+
+        m = pwrdm->mem_on_mask[bank];
+        if (!m)
+                return -EINVAL;
+
+        am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+                                pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+        return 0;
+}
+
+static int am33xx_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
+                                        u8 pwrst)
+{
+        u32 m;
+
+        m = pwrdm->mem_ret_mask[bank];
+        if (!m)
+                return -EINVAL;
+
+        am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+                                pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+        return 0;
+}
+
+static int am33xx_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+        u32 m, v;
+
+        m = pwrdm->mem_pwrst_mask[bank];
+        if (!m)
+                return -EINVAL;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+        v &= m;
+        v >>= __ffs(m);
+
+        return v;
+}
+
+static int am33xx_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
+{
+        u32 m, v;
+
+        m = pwrdm->mem_retst_mask[bank];
+        if (!m)
+                return -EINVAL;
+
+        v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+        v &= m;
+        v >>= __ffs(m);
+
+        return v;
+}
+
+static int am33xx_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 ((am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs)
+                        & OMAP_INTRANSITION_MASK) &&
+                        (c++ < PWRDM_TRANSITION_BAILOUT))
+                udelay(1);
+
+        if (c > PWRDM_TRANSITION_BAILOUT) {
+                pr_err("powerdomain: %s: waited too long to complete transition\n",
+                       pwrdm->name);
+                return -EAGAIN;
+        }
+
+        pr_debug("powerdomain: completed transition in %d loops\n", c);
+
+        return 0;
+}
+
+struct pwrdm_ops am33xx_pwrdm_operations = {
+        .pwrdm_set_next_pwrst           = am33xx_pwrdm_set_next_pwrst,
+        .pwrdm_read_next_pwrst          = am33xx_pwrdm_read_next_pwrst,
+        .pwrdm_read_pwrst               = am33xx_pwrdm_read_pwrst,
+        .pwrdm_read_prev_pwrst          = am33xx_pwrdm_read_prev_pwrst,
+        .pwrdm_set_logic_retst          = am33xx_pwrdm_set_logic_retst,
+        .pwrdm_read_logic_pwrst         = am33xx_pwrdm_read_logic_pwrst,
+        .pwrdm_read_logic_retst         = am33xx_pwrdm_read_logic_retst,
+        .pwrdm_clear_all_prev_pwrst     = am33xx_pwrdm_clear_all_prev_pwrst,
+        .pwrdm_set_lowpwrstchange       = am33xx_pwrdm_set_lowpwrstchange,
+        .pwrdm_read_mem_pwrst           = am33xx_pwrdm_read_mem_pwrst,
+        .pwrdm_read_mem_retst           = am33xx_pwrdm_read_mem_retst,
+        .pwrdm_set_mem_onst             = am33xx_pwrdm_set_mem_onst,
+        .pwrdm_set_mem_retst            = am33xx_pwrdm_set_mem_retst,
+        .pwrdm_wait_transition          = am33xx_pwrdm_wait_transition,
+};