On Mon, Sep 26, 2011 at 8:15 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > On Mon, 26 Sep 2011, Munegowda, Keshava wrote: > >> On Sat, Sep 24, 2011 at 12:45 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: >> > On Fri, 23 Sep 2011, Munegowda, Keshava wrote: >> > >> >> On Thu, Sep 22, 2011 at 11:31 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: >> >> > >> >> > On Thu, 22 Sep 2011, Keshava Munegowda wrote: >> >> >> 4. usb_tll_hs hwmod of usbhs with the TLL base address and irq. >> >> >> >> >> >> Signed-off-by: Keshava Munegowda <keshava_mgowda@xxxxxx> >> >> >> Reviewed-by: Partha Basak <parthab@xxxxxxxxxxxx> >> >> >> --- >> >> >> arch/arm/mach-omap2/omap_hwmod_3xxx_data.c | 271 ++++++++++++++++++++++++++++ >> >> >> 1 files changed, 271 insertions(+), 0 deletions(-) >> >> >> >> >> >> diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c >> >> >> index 59fdb9f..d79f728 100644 >> >> >> --- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c >> >> >> +++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c >> > >> >> >> +static struct omap_hwmod_ocp_if omap34xx_f128m_cfg__usb_host_hs = { >> >> >> + .clk = "usbhost_120m_fck", >> >> > >> >> > This doesn't look right. This is an interface structure record, so it >> >> > should be associated with an interface clock. Is the hardware really >> >> > using the functional clock as the interface clock? Or, as seems more >> >> > likely... >> >> >> >> >> >> Agreed, how about: >> >> >> >> main clock: usbhost_120m_fck >> >> optional f clock: usbhost_48m_fck >> > >> > Assuming the interface clock is enabled, which one of these clocks is >> > needed for UHH register accesses to complete successfully? >> >> it is usbhost_48m_fck ; >> so, >> main clock: usbhost_48m_fck >> optional clock : usbhost_120m_fck >> >> do you agree? > > Yes. Thanks paul, But In USB Host case, there is a challenge! I need both usbhost_48m_fck and usbhost_120m_fck to be turned on when I invoke pm_runtime_get_sync ; so there are couple of options to do this 1. use clk_get with hard coded usbhost_120m_fck name in usbhs driver enable this clock after invoking pm_runtime_get_sync 2. add an additional flag in hwmod ; so that pm_runtime_get_sync will enable main clock as well as optional clocks please comment on these two approaches.. regards keshava -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html