Commit 8cb0ac99 authored by Paul Walmsley's avatar Paul Walmsley Committed by Kevin Hilman
Browse files

OMAP3: PM: PRCM interrupt: only handle selected PRCM interrupts 



Clearing wakeup sources is now only done when the PRM indicates a
wakeup source interrupt.  Since we don't handle any other types of
PRCM interrupts right now, warn if we get any other type of PRCM
interrupt.  Either code needs to be added to the PRCM interrupt
handler to react to these, or these other interrupts should be masked
off at init.

Updated after Jon Hunter's PRCM IRQ rework by Kevin Hilman.

Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 5d805978

arch/arm/mach-omap2/pm34xx.c

+37 −9
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ static struct powerdomain *mpu_pwrdm; 
 * that any peripheral wake-up events occurring while attempting to

 * clear the PM_WKST_x are detected and cleared.

 */

static void prcm_clear_mod_irqs(s16 module, u8 regs)

static int prcm_clear_mod_irqs(s16 module, u8 regs)

{

	u32 wkst, fclk, iclk;

	u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1;
@@ -69,6 +69,7 @@ static void prcm_clear_mod_irqs(s16 module, u8 regs) 
	u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1;

	u16 grpsel_off = (regs == 3) ?

		OMAP3430ES2_PM_MPUGRPSEL3 : OMAP3430_PM_MPUGRPSEL;

	int c = 0;



	wkst = prm_read_mod_reg(module, wkst_off);

	wkst &= prm_read_mod_reg(module, grpsel_off);
@@ -80,10 +81,28 @@ static void prcm_clear_mod_irqs(s16 module, u8 regs) 
			cm_set_mod_reg_bits(wkst, module, fclk_off);

			prm_write_mod_reg(wkst, module, wkst_off);

			wkst = prm_read_mod_reg(module, wkst_off);

			c++;

		}

		cm_write_mod_reg(iclk, module, iclk_off);

		cm_write_mod_reg(fclk, module, fclk_off);

	}



	return c;

}



static int _prcm_int_handle_wakeup(void)

{

	int c;



	c = prcm_clear_mod_irqs(WKUP_MOD, 1);

	c += prcm_clear_mod_irqs(CORE_MOD, 1);

	c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1);

	if (omap_rev() > OMAP3430_REV_ES1_0) {

		c += prcm_clear_mod_irqs(CORE_MOD, 3);

		c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);

	}



	return c;

}



/*
@@ -106,18 +125,27 @@ static void prcm_clear_mod_irqs(s16 module, u8 regs) 
static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)

{

	u32 irqstatus_mpu;

	int c = 0;



	do {

		prcm_clear_mod_irqs(WKUP_MOD, 1);

		prcm_clear_mod_irqs(CORE_MOD, 1);

		prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1);

		if (omap_rev() > OMAP3430_REV_ES1_0) {

			prcm_clear_mod_irqs(CORE_MOD, 3);

			prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);

		}



		irqstatus_mpu = prm_read_mod_reg(OCP_MOD,

					OMAP3_PRM_IRQSTATUS_MPU_OFFSET);



		if (irqstatus_mpu & (OMAP3430_WKUP_ST | OMAP3430_IO_ST)) {

			c = _prcm_int_handle_wakeup();



			/*

			 * Is the MPU PRCM interrupt handler racing with the

			 * IVA2 PRCM interrupt handler ?

			 */

			WARN(c == 0, "prcm: WARNING: PRCM indicated MPU wakeup "

			     "but no wakeup sources are marked\n");

		} else {

			/* XXX we need to expand our PRCM interrupt handler */

			WARN(1, "prcm: WARNING: PRCM interrupt received, but "

			     "no code to handle it (%08x)\n", irqstatus_mpu);

		}



		prm_write_mod_reg(irqstatus_mpu, OCP_MOD,

					OMAP3_PRM_IRQSTATUS_MPU_OFFSET);

CRA Git | Maintained and supported by SUSTech CRA and CCSE