| Subject | Re: [PATCH 3.18 22/68] ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg_ss | From | Roger Quadros <> | Date | Wed, 21 Mar 2018 12:37:47 +0200 |
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Hi Greg,
On 19/03/18 20:06, Greg Kroah-Hartman wrote: > 3.18-stable review patch. If anyone has any objections, please let me know. >
Please drop this from 3.18-stable as well. Thanks.
> ------------------ > > From: Roger Quadros <rogerq@ti.com> > > > [ Upstream commit e2d54fe76997301b49311bde7ba8ef52b47896f9 ] > > It seems that if L3_INIT clkdomain is kept in HW_AUTO while usb_otg_ss > is in use then there are random chances that the usb_otg_ss module > will fail to completely idle. i.e. IDLEST = 0x2 instead of 0x3. > > Preventing L3_INIT from HW_AUTO while usb_otg_ss module is in use > fixes this issue. > > We don't know yet if usb_otg_ss instances 3 and 4 are affected by this > issue or not so don't add this flag for those instances. > > Cc: Tero Kristo <t-kristo@ti.com> > Signed-off-by: Roger Quadros <rogerq@ti.com> > Signed-off-by: Tony Lindgren <tony@atomide.com> > Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > --- > arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 2 ++ > 1 file changed, 2 insertions(+) > > --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c > +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c > @@ -2106,6 +2106,7 @@ static struct omap_hwmod dra7xx_usb_otg_ > .class = &dra7xx_usb_otg_ss_hwmod_class, > .clkdm_name = "l3init_clkdm", > .main_clk = "dpll_core_h13x2_ck", > + .flags = HWMOD_CLKDM_NOAUTO, > .prcm = { > .omap4 = { > .clkctrl_offs = DRA7XX_CM_L3INIT_USB_OTG_SS1_CLKCTRL_OFFSET, > @@ -2127,6 +2128,7 @@ static struct omap_hwmod dra7xx_usb_otg_ > .class = &dra7xx_usb_otg_ss_hwmod_class, > .clkdm_name = "l3init_clkdm", > .main_clk = "dpll_core_h13x2_ck", > + .flags = HWMOD_CLKDM_NOAUTO, > .prcm = { > .omap4 = { > .clkctrl_offs = DRA7XX_CM_L3INIT_USB_OTG_SS2_CLKCTRL_OFFSET, > >
-- cheers, -roger
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