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OMAP3: PM: Enable IO / IO-CHAIN wakeups for PER

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IO events can also come from GPIO modules, which reside in the PER domain.
It is possible for the PER to enter RET while CORE is still in ON.
If GPIO 2-6 are enabled for IO-pad wakeups, the PER domain will not
wakeup in this case, unless we enable it.

Signed-off-by: Mike Chan <mike@android.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Mike Chan 2010-05-03 16:04:06 -07:00 committed by Kevin Hilman
parent 7a44ad2fce
commit 40742fa82e
1 changed files with 11 additions and 5 deletions
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16
arch/arm/mach-omap2/pm34xx.c
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@ -379,9 +379,16 @@ void omap_sram_idle(void)
if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON)
pwrdm_set_next_pwrst(neon_pwrdm, mpu_next_state);
/* PER */
/* Enable IO-PAD and IO-CHAIN wakeups */
per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
if (per_next_state < PWRDM_POWER_ON ||
core_next_state < PWRDM_POWER_ON) {
prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
omap3_enable_io_chain();
}
/* PER */
if (per_next_state < PWRDM_POWER_ON) {
omap_uart_prepare_idle(2);
omap2_gpio_prepare_for_retention();
@ -406,10 +413,8 @@ void omap_sram_idle(void)
omap3_core_save_context();
omap3_prcm_save_context();
}
/* Enable IO-PAD and IO-CHAIN wakeups */
prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
omap3_enable_io_chain();
}
omap3_intc_prepare_idle();
/*
@ -471,7 +476,8 @@ void omap_sram_idle(void)
}
/* Disable IO-PAD and IO-CHAIN wakeup */
if (core_next_state < PWRDM_POWER_ON) {
if (per_next_state < PWRDM_POWER_ON ||
core_next_state < PWRDM_POWER_ON) {
prm_clear_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
omap3_disable_io_chain();
}