diff options
author | Paul Walmsley <paul@pwsan.com> | 2012-10-21 01:01:10 -0600 |
---|---|---|
committer | Paul Walmsley <paul@pwsan.com> | 2012-10-21 01:01:10 -0600 |
commit | 498153995b9ff41279be54fc56facb92f5cad793 (patch) | |
tree | 82736e204351bcd198d5dcec3c41deeab1b6779f /arch/arm/mach-omap2/prm2xxx_3xxx.c | |
parent | 139563ad27e7baad7935b8113940f0d804cf513b (diff) | |
download | linux-498153995b9ff41279be54fc56facb92f5cad793.tar.bz2 |
ARM: OMAP2+: powerdomain/PRM: move the low-level powerdomain functions into PRM
Move the low-level SoC-specific powerdomain control functions into
prm*.c. For example, OMAP2xxx low-level powerdomain functions go into
prm2xxx.c. Then remove the unnecessary powerdomain*xxx*.c files.
The objective is to centralize low-level PRM register accesses into
the prm*.[ch] files, and then to export an OMAP SoC-independent API to
higher-level OMAP power management code.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Acked-by: Rajendra Nayak <rnayak@ti.com>
Reviewed-by: Russ Dill <Russ.Dill@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/prm2xxx_3xxx.c')
-rw-r--r-- | arch/arm/mach-omap2/prm2xxx_3xxx.c | 112 |
1 files changed, 111 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.c b/arch/arm/mach-omap2/prm2xxx_3xxx.c index 0d6cc543987d..bdddf5ca67c4 100644 --- a/arch/arm/mach-omap2/prm2xxx_3xxx.c +++ b/arch/arm/mach-omap2/prm2xxx_3xxx.c @@ -17,7 +17,7 @@ #include <linux/io.h> #include "common.h" - +#include "powerdomain.h" #include "prm2xxx_3xxx.h" #include "prm-regbits-24xx.h" @@ -98,3 +98,113 @@ int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift) return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0; } + +/* Powerdomain low-level functions */ + +/* Common functions across OMAP2 and OMAP3 */ +int omap2_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) +{ + omap2_prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK, + (pwrst << OMAP_POWERSTATE_SHIFT), + pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL); + return 0; +} + +int omap2_pwrdm_read_next_pwrst(struct powerdomain *pwrdm) +{ + return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL, + OMAP_POWERSTATE_MASK); +} + +int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm) +{ + return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs, + OMAP2_PM_PWSTST, + OMAP_POWERSTATEST_MASK); +} + +int omap2_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_onstate_mask(bank); + + omap2_prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL); + + return 0; +} + +int omap2_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + omap2_prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL); + + return 0; +} + +int omap2_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_stst_mask(bank); + + return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST, + m); +} + +int omap2_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL, m); +} + +int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) +{ + u32 v; + + v = pwrst << __ffs(OMAP_LOGICRETSTATE_MASK); + omap2_prm_rmw_mod_reg_bits(OMAP_LOGICRETSTATE_MASK, v, pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL); + + return 0; +} + +int omap2_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 ((omap2_prm_read_mod_reg(pwrdm->prcm_offs, OMAP2_PM_PWSTST) & + 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; +} + |