* Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> [091014 15:15]:
> From: Rajendra Nayak <rnayak@xxxxxx>
Might be worth checking the descriptions in the whole series :)
> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
> Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/mach-omap2/pm34xx.c | 64 +++++++++++++++++++++++++++++++++++------
> 1 files changed, 54 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index 9dbb5a0..7eab539 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -49,7 +49,10 @@ static LIST_HEAD(pwrst_list);
>
> static void (*_omap_sram_idle)(u32 *addr, int save_state);
>
> -static struct powerdomain *mpu_pwrdm;
> +static struct powerdomain *mpu_pwrdm, *neon_pwrdm;
> +static struct powerdomain *core_pwrdm, *per_pwrdm;
> +
> +static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
>
> /*
> * PRCM Interrupt Handler Helper Function
> @@ -169,13 +172,22 @@ static void omap_sram_idle(void)
> /* save_state = 1 => Only L1 and logic lost */
> /* save_state = 2 => Only L2 lost */
> /* save_state = 3 => L1, L2 and logic lost */
> - int save_state = 0, mpu_next_state;
> + int save_state = 0;
> + int mpu_next_state = PWRDM_POWER_ON;
> + int per_next_state = PWRDM_POWER_ON;
> + int core_next_state = PWRDM_POWER_ON;
>
> if (!_omap_sram_idle)
> return;
>
> + pwrdm_clear_all_prev_pwrst(mpu_pwrdm);
> + pwrdm_clear_all_prev_pwrst(neon_pwrdm);
> + pwrdm_clear_all_prev_pwrst(core_pwrdm);
> + pwrdm_clear_all_prev_pwrst(per_pwrdm);
> +
> mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
> switch (mpu_next_state) {
> + case PWRDM_POWER_ON:
> case PWRDM_POWER_RET:
> /* No need to save context */
> save_state = 0;
> @@ -187,18 +199,37 @@ static void omap_sram_idle(void)
> }
> pwrdm_pre_transition();
>
> - omap2_gpio_prepare_for_retention();
> - omap_uart_prepare_idle(0);
> - omap_uart_prepare_idle(1);
> - omap_uart_prepare_idle(2);
> + /* NEON control */
> + if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON)
> + set_pwrdm_state(neon_pwrdm, mpu_next_state);
> +
> + /* CORE & PER */
> + core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
> + if (core_next_state < PWRDM_POWER_ON) {
> + omap2_gpio_prepare_for_retention();
> + omap_uart_prepare_idle(0);
> + omap_uart_prepare_idle(1);
> + /* PER changes only with core */
> + per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
> + if (per_next_state < PWRDM_POWER_ON)
> + omap_uart_prepare_idle(2);
> + /* Enable IO-PAD wakeup */
> + prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
> + }
>
> _omap_sram_idle(NULL, save_state);
> cpu_init();
>
> - omap_uart_resume_idle(2);
> - omap_uart_resume_idle(1);
> - omap_uart_resume_idle(0);
> - omap2_gpio_resume_after_retention();
> + if (core_next_state < PWRDM_POWER_ON) {
> + if (per_next_state < PWRDM_POWER_ON)
> + omap_uart_resume_idle(2);
> + omap_uart_resume_idle(1);
> + omap_uart_resume_idle(0);
> +
> + /* Disable IO-PAD wakeup */
> + prm_clear_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
> + omap2_gpio_resume_after_retention();
> + }
>
> pwrdm_post_transition();
>
> @@ -791,6 +822,10 @@ static int __init omap3_pm_init(void)
> goto err2;
> }
>
> + neon_pwrdm = pwrdm_lookup("neon_pwrdm");
> + per_pwrdm = pwrdm_lookup("per_pwrdm");
> + core_pwrdm = pwrdm_lookup("core_pwrdm");
> +
> omap_push_sram_idle();
> #ifdef CONFIG_SUSPEND
> suspend_set_ops(&omap_pm_ops);
> @@ -798,6 +833,15 @@ static int __init omap3_pm_init(void)
>
> pm_idle = omap3_pm_idle;
>
> + pwrdm_add_wkdep(neon_pwrdm, mpu_pwrdm);
> + /*
> + * REVISIT: This wkdep is only necessary when GPIO2-6 are enabled for
> + * IO-pad wakeup. Otherwise it will unnecessarily waste power
> + * waking up PER with every CORE wakeup - see
> + * http://marc.info/?l=linux-omap&m=121852150710062&w=2
> + */
> + pwrdm_add_wkdep(per_pwrdm, core_pwrdm);
> +
> err1:
> return ret;
> err2:
> --
> 1.6.4.3
>
>
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