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OMAP3: PM: Force IVA2 into idle during bootup
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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94434535bd
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@ -352,6 +352,54 @@ static struct platform_suspend_ops omap_pm_ops = {
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.valid = suspend_valid_only_mem,
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};
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/**
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* omap3_iva_idle(): ensure IVA is in idle so it can be put into
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* retention
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*
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* In cases where IVA2 is activated by bootcode, it may prevent
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* full-chip retention or off-mode because it is not idle. This
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* function forces the IVA2 into idle state so it can go
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* into retention/off and thus allow full-chip retention/off.
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*
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**/
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static void __init omap3_iva_idle(void)
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{
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/* ensure IVA2 clock is disabled */
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cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
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/* if no clock activity, nothing else to do */
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if (!(cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
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OMAP3430_CLKACTIVITY_IVA2_MASK))
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return;
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/* Reset IVA2 */
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prm_write_mod_reg(OMAP3430_RST1_IVA2 |
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OMAP3430_RST2_IVA2 |
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OMAP3430_RST3_IVA2,
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OMAP3430_IVA2_MOD, RM_RSTCTRL);
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/* Enable IVA2 clock */
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cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2,
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OMAP3430_IVA2_MOD, CM_FCLKEN);
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/* Set IVA2 boot mode to 'idle' */
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omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
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OMAP343X_CONTROL_IVA2_BOOTMOD);
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/* Un-reset IVA2 */
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prm_write_mod_reg(0, OMAP3430_IVA2_MOD, RM_RSTCTRL);
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/* Disable IVA2 clock */
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cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
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/* Reset IVA2 */
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prm_write_mod_reg(OMAP3430_RST1_IVA2 |
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OMAP3430_RST2_IVA2 |
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OMAP3430_RST3_IVA2,
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OMAP3430_IVA2_MOD, RM_RSTCTRL);
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}
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static void __init prcm_setup_regs(void)
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{
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/* reset modem */
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@ -511,6 +559,8 @@ static void __init prcm_setup_regs(void)
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* it is selected to mpu wakeup goup */
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prm_write_mod_reg(OMAP3430_IO_EN | OMAP3430_WKUP_EN,
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OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
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omap3_iva_idle();
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}
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static int __init pwrdms_setup(struct powerdomain *pwrdm)
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@ -189,6 +189,11 @@
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#define OMAP2_PBIASLITEPWRDNZ0 (1 << 1)
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#define OMAP2_PBIASLITEVMODE0 (1 << 0)
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/* CONTROL_IVA2_BOOTMOD bits */
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#define OMAP3_IVA2_BOOTMOD_SHIFT 0
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#define OMAP3_IVA2_BOOTMOD_MASK (0xf << 0)
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#define OMAP3_IVA2_BOOTMOD_IDLE (0x1 << 0)
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#ifndef __ASSEMBLY__
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#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
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extern void __iomem *omap_ctrl_base_get(void);
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