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@xxxxxx>
>
>
> [ 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@xxxxxx>
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> 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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