This is a note to let you know that I've just added the patch titled
ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg_ss
to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: arm-dra7-hwmod_data-prevent-wait_target_disable-error-for-usb_otg_ss.patch and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Mar 19 10:11:52 CET 2018
From: Roger Quadros rogerq@ti.com Date: Mon, 13 Mar 2017 13:53:16 +0200 Subject: ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg_ss
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,
Patches currently in stable-queue which might be from rogerq@ti.com are
queue-3.18/arm-dra7-hwmod_data-prevent-wait_target_disable-error-for-usb_otg_ss.patch