[PATCH V5 0/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[PATCH V5 0/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[LI Qingwu]

Changes in V5:
  Add Reviewed-by: Abel Vesa.

LI Qingwu (1):
  clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

 drivers/clk/imx/clk-imx8mp.c | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.25.1


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[PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[LI Qingwu]

Defined IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV in imx8mp-clock.h
but never assigned. It will cause the system to hang if using them.
Alias IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV to IMX8MP_CLK_M7_CORE
for backward compatibility.

Fixes: 8c83a8ff4dd9 (clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code)
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
---
 drivers/clk/imx/clk-imx8mp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
index 652ae58c2735..601eea7ab99d 100644
--- a/drivers/clk/imx/clk-imx8mp.c
+++ b/drivers/clk/imx/clk-imx8mp.c
@@ -522,6 +522,8 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
 	hws[IMX8MP_CLK_A53_SRC] = hws[IMX8MP_CLK_A53_DIV];
 	hws[IMX8MP_CLK_A53_CG] = hws[IMX8MP_CLK_A53_DIV];
 	hws[IMX8MP_CLK_M7_CORE] = imx8m_clk_hw_composite_core("m7_core", imx8mp_m7_sels, ccm_base + 0x8080);
+	hws[IMX8MP_CLK_M7_DIV] = hws[IMX8MP_CLK_M7_CORE];
+	hws[IMX8MP_CLK_M7_SRC] = hws[IMX8MP_CLK_M7_CORE];
 	hws[IMX8MP_CLK_ML_CORE] = imx8m_clk_hw_composite_core("ml_core", imx8mp_ml_sels, ccm_base + 0x8100);
 	hws[IMX8MP_CLK_GPU3D_CORE] = imx8m_clk_hw_composite_core("gpu3d_core", imx8mp_gpu3d_core_sels, ccm_base + 0x8180);
 	hws[IMX8MP_CLK_GPU3D_SHADER_CORE] = imx8m_clk_hw_composite("gpu3d_shader_core", imx8mp_gpu3d_shader_sels, ccm_base + 0x8200);
-- 
2.25.1


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Re: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[Abel Vesa]

On 23-01-11 11:10:30, LI Qingwu wrote:
> Defined IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV in imx8mp-clock.h
> but never assigned. It will cause the system to hang if using them.
> Alias IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV to IMX8MP_CLK_M7_CORE
> for backward compatibility.
> 
> Fixes: 8c83a8ff4dd9 (clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code)
> Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
> Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>

Stephen, can you please pick this up yourself?

Thanks!

> ---
>  drivers/clk/imx/clk-imx8mp.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
> index 652ae58c2735..601eea7ab99d 100644
> --- a/drivers/clk/imx/clk-imx8mp.c
> +++ b/drivers/clk/imx/clk-imx8mp.c
> @@ -522,6 +522,8 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
>  	hws[IMX8MP_CLK_A53_SRC] = hws[IMX8MP_CLK_A53_DIV];
>  	hws[IMX8MP_CLK_A53_CG] = hws[IMX8MP_CLK_A53_DIV];
>  	hws[IMX8MP_CLK_M7_CORE] = imx8m_clk_hw_composite_core("m7_core", imx8mp_m7_sels, ccm_base + 0x8080);
> +	hws[IMX8MP_CLK_M7_DIV] = hws[IMX8MP_CLK_M7_CORE];
> +	hws[IMX8MP_CLK_M7_SRC] = hws[IMX8MP_CLK_M7_CORE];
>  	hws[IMX8MP_CLK_ML_CORE] = imx8m_clk_hw_composite_core("ml_core", imx8mp_ml_sels, ccm_base + 0x8100);
>  	hws[IMX8MP_CLK_GPU3D_CORE] = imx8m_clk_hw_composite_core("gpu3d_core", imx8mp_gpu3d_core_sels, ccm_base + 0x8180);
>  	hws[IMX8MP_CLK_GPU3D_SHADER_CORE] = imx8m_clk_hw_composite("gpu3d_shader_core", imx8mp_gpu3d_shader_sels, ccm_base + 0x8200);
> -- 
> 2.25.1
> 

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Re: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[Stephen Boyd]

Quoting Abel Vesa (2023-01-16 06:28:33)
> On 23-01-11 11:10:30, LI Qingwu wrote:
> > Defined IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV in imx8mp-clock.h
> > but never assigned. It will cause the system to hang if using them.
> > Alias IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV to IMX8MP_CLK_M7_CORE
> > for backward compatibility.
> > 
> > Fixes: 8c83a8ff4dd9 (clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code)
> > Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
> > Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> > Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
> 
> Stephen, can you please pick this up yourself?
> 

Is it needed for clk-fixes? When did the system start hanging?

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Re: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[Abel Vesa]

On 23-01-18 11:00:36, Stephen Boyd wrote:
> Quoting Abel Vesa (2023-01-16 06:28:33)
> > On 23-01-11 11:10:30, LI Qingwu wrote:
> > > Defined IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV in imx8mp-clock.h
> > > but never assigned. It will cause the system to hang if using them.
> > > Alias IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV to IMX8MP_CLK_M7_CORE
> > > for backward compatibility.
> > > 
> > > Fixes: 8c83a8ff4dd9 (clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code)
> > > Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
> > > Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> > > Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
> > 
> > Stephen, can you please pick this up yourself?
> > 
> 
> Is it needed for clk-fixes? When did the system start hanging?

Li, Peng, can you provide some details here?

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RE: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[LI Qingwu]

> -----Original Message-----
> From: Abel Vesa <abel.vesa@linaro.org>
> Sent: Sunday, January 29, 2023 2:39 AM
> To: Stephen Boyd <sboyd@kernel.org>; LI Qingwu
> <Qing-wu.Li@leica-geosystems.com.cn>; Peng Fan <peng.fan@nxp.com>
> Cc: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>; abelvesa@kernel.org;
> mturquette@baylibre.com; shawnguo@kernel.org; s.hauer@pengutronix.de;
> kernel@pengutronix.de; festevam@gmail.com; linux-imx@nxp.com;
> linux-clk@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.kernel.org; 18701859600@163.com;
> GEO-CHHER-bsp-development <bsp-development.geo@leica-geosystems.com>;
> Marco Felsch <m.felsch@pengutronix.de>
> Subject: Re: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE
> 
> [Some people who received this message don't often get email from
> abel.vesa@linaro.org. Learn why this is important at
> https://aka.ms/LearnAboutSenderIdentification ]
> 
> This email is not from Hexagon's Office 365 instance. Please be careful while
> clicking links, opening attachments, or replying to this email.
> 
> 
> On 23-01-18 11:00:36, Stephen Boyd wrote:
> > Quoting Abel Vesa (2023-01-16 06:28:33)
> > > On 23-01-11 11:10:30, LI Qingwu wrote:
> > > > Defined IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV in
> imx8mp-clock.h
> > > > but never assigned. It will cause the system to hang if using them.
> > > > Alias IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV to
> > > > IMX8MP_CLK_M7_CORE for backward compatibility.
> > > >
> > > > Fixes: 8c83a8ff4dd9 (clk: imx8mp: use imx8m_clk_hw_composite_core
> > > > to simplify code)
> > > > Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
> > > > Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> > > > Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
> > >
> > > Stephen, can you please pick this up yourself?
> > >
> >
> > Is it needed for clk-fixes? When did the system start hanging?
> 
> Li, Peng, can you provide some details here?

Since IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV were not assigned,
if using any one of them in device tree, Linux system hanging after start M7 core.

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RE: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[LI Qingwu]

> -----Original Message-----
> From: Stephen Boyd <sboyd@kernel.org>
> Sent: Tuesday, January 31, 2023 6:35 AM
> To: Abel Vesa <abel.vesa@linaro.org>; LI Qingwu 
> <qing-wu.li@leica-geosystems.com.cn>; Peng Fan <peng.fan@nxp.com>
> Cc: abelvesa@ <kernel.org abelvesa@kernel.org>; mturquette@ 
> <baylibre.com mturquette@baylibre.com>; shawnguo@ <kernel.org 
> shawnguo@kernel.org>; s.hauer@ <pengutronix.de 
> s.hauer@pengutronix.de>; kernel@ <pengutronix.de 
> kernel@pengutronix.de>; festevam@ <gmail.com festevam@gmail.com>; 
> linux-imx@ <nxp.com linux-imx@nxp.com>; linux-clk@ <vger.kernel.org 
> linux-clk@vger.kernel.org>; linux-arm-kernel@ <lists.infradead.org 
> linux-arm-kernel@lists.infradead.org>; linux-kernel@ <vger.kernel.org 
> linux-kernel@vger.kernel.org>; 18701859600@ <163.com 
> 18701859600@163.com>; GEO-CHHER-bsp-development 
> <bsp-development.geo@leica-geosystems.com>; Marco Felsch 
> <m.felsch@pengutronix.de>
> Subject: RE: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE
> 
> This email is not from Hexagon’s Office 365 instance. Please be 
> careful while clicking links, opening attachments, or replying to this email.
> 
> 
> Quoting LI Qingwu (2023-01-29 23:44:22)
> >
> > > > Is it needed for clk-fixes? When did the system start hanging?
> > >
> > > Li, Peng, can you provide some details here?
> >
> > Since IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV were not assigned, if 
> > using any one of them in device tree, Linux system hanging after 
> > start M7
> core.
> 
>  $ git grep -e IMX8MP_CLK_M7_SRC -o -e IMX8MP_CLK_M7_DIV 
> include/dt-bindings/clock/imx8mp-clock.h:IMX8MP_CLK_M7_SRC
>  include/dt-bindings/clock/imx8mp-clock.h:IMX8MP_CLK_M7_DIV
> 
> so we're OK to let Abel apply this?

Just check it's OK to apply or not? Why ?
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Re: [PATCH V5 1/1] clk: imx8mp: Alias M7 SRC/DIV to M7 CORE

[Abel Vesa]

On 23-01-30 14:34:30, Stephen Boyd wrote:
> Quoting LI Qingwu (2023-01-29 23:44:22)
> > 
> > > > Is it needed for clk-fixes? When did the system start hanging?
> > > 
> > > Li, Peng, can you provide some details here?
> > 
> > Since IMX8MP_CLK_M7_SRC and IMX8MP_CLK_M7_DIV were not assigned,
> > if using any one of them in device tree, Linux system hanging after start M7 core.
> 
>  $ git grep -e IMX8MP_CLK_M7_SRC -o -e IMX8MP_CLK_M7_DIV
>  include/dt-bindings/clock/imx8mp-clock.h:IMX8MP_CLK_M7_SRC
>  include/dt-bindings/clock/imx8mp-clock.h:IMX8MP_CLK_M7_DIV
> 
> so we're OK to let Abel apply this?

Replying here as the CC emails in Li's next-in-thread email are all messed up and
the reply I sent there bounced back.

As Stephen pointed out, in upstream, there is no current user for those
two clock IDs. So I suppose we can keep the Fixes tag, but currently,
on upstream, there is no chance a consumer could hang as there is no
consumer yet for these clocks.

Stephen, I'll add this to my 6.4 material, again, since there is no
actual comsumer yet, if that's OK with you.


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