From: Vikram Pandita Date: Sat, 18 Jul 2009 00:33:09 +0000 (-0500) Subject: OMAP3: PM: USBHOST: clear wakeup events on both hosts X-Git-Tag: 2.1b_release~10674^2^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=71a807757394205cdb1465d68a4f0be50fd6f04b;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git OMAP3: PM: USBHOST: clear wakeup events on both hosts USBHOST module has 2 fclocks (for HOST1 and HOST2), only one iclock and only a single bit in the WKST register to indicate a wakeup event. Because of the single WKST bit, we cannot know whether a wakeup event was on HOST1 or HOST2, so enable both fclocks before clearing the wakeup event to ensure both hosts can properly clear the event. Signed-off-by: Vikram Pandita Signed-off-by: Kevin Hilman --- diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index d9440a1..cf6ea9f 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -63,7 +63,7 @@ static struct powerdomain *mpu_pwrdm; */ static int prcm_clear_mod_irqs(s16 module, u8 regs) { - u32 wkst, fclk, iclk; + u32 wkst, fclk, iclk, clken; u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1; u16 fclk_off = (regs == 3) ? OMAP3430ES2_CM_FCLKEN3 : CM_FCLKEN1; u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1; @@ -77,8 +77,15 @@ static int prcm_clear_mod_irqs(s16 module, u8 regs) iclk = cm_read_mod_reg(module, iclk_off); fclk = cm_read_mod_reg(module, fclk_off); while (wkst) { - cm_set_mod_reg_bits(wkst, module, iclk_off); - cm_set_mod_reg_bits(wkst, module, fclk_off); + clken = wkst; + cm_set_mod_reg_bits(clken, module, iclk_off); + /* + * For USBHOST, we don't know whether HOST1 or + * HOST2 woke us up, so enable both f-clocks + */ + if (module == OMAP3430ES2_USBHOST_MOD) + clken |= 1 << OMAP3430ES2_EN_USBHOST2_SHIFT; + cm_set_mod_reg_bits(clken, module, fclk_off); prm_write_mod_reg(wkst, module, wkst_off); wkst = prm_read_mod_reg(module, wkst_off); c++;