linux-kernel - Re: [PATCH 4.4 038/134] ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg

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Date:   Tue, 20 Mar 2018 07:52:51 +0800
From:   Dan Rue <dan.rue@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Tero Kristo <t-kristo@...com>, Roger Quadros <rogerq@...com>,
        Tony Lindgren <tony@...mide.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: Re: [PATCH 4.4 038/134] ARM: DRA7: hwmod_data: Prevent
 wait_target_disable error for usb_otg_ss

On Mon, Mar 19, 2018 at 07:05:21PM +0100, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Roger Quadros <rogerq@...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@...com>
> Signed-off-by: Roger Quadros <rogerq@...com>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

This fails to build for me on arm32 with default config.

#
# make -j10 -k -s ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=build-arm multi_v7_defconfig
#
#
# make -j10 -k -s ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=build-arm
#
../arch/arm/mach-omap2/omap_hwmod_7xx_data.c:2243:12: error: 'HWMOD_CLKDM_NOAUTO' undeclared here (not in a function)
  .flags  = HWMOD_CLKDM_NOAUTO,
            ^
../scripts/Makefile.build:269: recipe for target 'arch/arm/mach-omap2/omap_hwmod_7xx_data.o' failed
make[2]: *** [arch/arm/mach-omap2/omap_hwmod_7xx_data.o] Error 1
make[2]: Target '__build' not remade because of errors.
/home/buildslave/workspace/kernel-single-defconfig-builder/defconfig/multi_v7_defconfig/label/builder/Makefile:969: recipe for target 'arch/arm/mach-omap2' failed
make[1]: *** [arch/arm/mach-omap2] Error 2
make[1]: Target '_all' not remade because of errors.
Makefile:152: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
make: Target '_all' not remade because of errors.

Dan

> ---
>  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
> @@ -2240,6 +2240,7 @@ 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,
> @@ -2261,6 +2262,7 @@ 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,
> 
>