diff options
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain44xx.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/powerdomain44xx.c b/arch/arm/mach-omap2/powerdomain44xx.c index aeac6f35ca10..aceb4f464c9b 100644 --- a/arch/arm/mach-omap2/powerdomain44xx.c +++ b/arch/arm/mach-omap2/powerdomain44xx.c @@ -1,7 +1,7 @@ /* * OMAP4 powerdomain control * - * Copyright (C) 2009-2010 Texas Instruments, Inc. + * Copyright (C) 2009-2010, 2012 Texas Instruments, Inc. * Copyright (C) 2007-2009 Nokia Corporation * * Derived from mach-omap2/powerdomain.c written by Paul Walmsley @@ -151,6 +151,34 @@ static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm) return v; } +/** + * omap4_pwrdm_read_prev_logic_pwrst - read the previous logic powerstate + * @pwrdm: struct powerdomain * to read the state for + * + * Reads the previous logic powerstate for a powerdomain. This + * function must determine the previous logic powerstate by first + * checking the previous powerstate for the domain. If that was OFF, + * then logic has been lost. If previous state was RETENTION, the + * function reads the setting for the next retention logic state to + * see the actual value. In every other case, the logic is + * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET + * depending whether the logic was retained or not. + */ +static int omap4_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) +{ + int state; + + state = omap4_pwrdm_read_prev_pwrst(pwrdm); + + if (state == PWRDM_POWER_OFF) + return PWRDM_POWER_OFF; + + if (state != PWRDM_POWER_RET) + return PWRDM_POWER_RET; + + return omap4_pwrdm_read_logic_retst(pwrdm); +} + static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) { u32 m, v; @@ -179,6 +207,35 @@ static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) return v; } +/** + * omap4_pwrdm_read_prev_mem_pwrst - reads the previous memory powerstate + * @pwrdm: struct powerdomain * to read mem powerstate for + * @bank: memory bank index + * + * Reads the previous memory powerstate for a powerdomain. This + * function must determine the previous memory powerstate by first + * checking the previous powerstate for the domain. If that was OFF, + * then logic has been lost. If previous state was RETENTION, the + * function reads the setting for the next memory retention state to + * see the actual value. In every other case, the logic is + * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET + * depending whether logic was retained or not. + */ +static int omap4_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + int state; + + state = omap4_pwrdm_read_prev_pwrst(pwrdm); + + if (state == PWRDM_POWER_OFF) + return PWRDM_POWER_OFF; + + if (state != PWRDM_POWER_RET) + return PWRDM_POWER_RET; + + return omap4_pwrdm_read_mem_retst(pwrdm, bank); +} + static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm) { u32 c = 0; @@ -217,9 +274,11 @@ struct pwrdm_ops omap4_pwrdm_operations = { .pwrdm_clear_all_prev_pwrst = omap4_pwrdm_clear_all_prev_pwrst, .pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst, .pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst, + .pwrdm_read_prev_logic_pwrst = omap4_pwrdm_read_prev_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_read_prev_mem_pwrst = omap4_pwrdm_read_prev_mem_pwrst, .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, |