[PATCH 0/2] MPM pin mappings for MSM8226 and MSM8974

[PATCH 0/2] MPM pin mappings for MSM8226 and MSM8974

[Matti Lehtimäki]

This series adds the MPM wakeirq mappings for MSM8226 and MSM8974.

Matti Lehtimäki (2):
  pinctrl: qcom: msm8226: Add MPM pin mappings
  pinctrl: qcom: msm8974: Add MPM pin mappings

 drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
 drivers/pinctrl/qcom/pinctrl-msm8x74.c | 12 ++++++++++++
 2 files changed, 24 insertions(+)

-- 
2.39.2

[PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Matti Lehtimäki]

Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
through MPM-connected pins.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
---
 drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c b/drivers/pinctrl/qcom/pinctrl-msm8226.c
index 994619840a70..1e46a9ab382f 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
@@ -612,6 +612,16 @@ static const struct msm_pingroup msm8226_groups[] = {
 
 #define NUM_GPIO_PINGROUPS 117
 
+static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
+	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 },
+	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, { 35, 14 },
+	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 }, { 48, 20 },
+	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 }, { 62, 26 },
+	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 }, { 68, 32 },
+	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 },
+	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 55 },
+};
+
 static const struct msm_pinctrl_soc_data msm8226_pinctrl = {
 	.pins = msm8226_pins,
 	.npins = ARRAY_SIZE(msm8226_pins),
@@ -620,6 +630,8 @@ static const struct msm_pinctrl_soc_data msm8226_pinctrl = {
 	.groups = msm8226_groups,
 	.ngroups = ARRAY_SIZE(msm8226_groups),
 	.ngpios = NUM_GPIO_PINGROUPS,
+	.wakeirq_map = msm8226_mpm_map,
+	.nwakeirq_map = ARRAY_SIZE(msm8226_mpm_map),
 };
 
 static int msm8226_pinctrl_probe(struct platform_device *pdev)
-- 
2.39.2

[PATCH 2/2] pinctrl: qcom: msm8974: Add MPM pin mappings

[Matti Lehtimäki]

Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
through MPM-connected pins.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
---
 drivers/pinctrl/qcom/pinctrl-msm8x74.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm8x74.c b/drivers/pinctrl/qcom/pinctrl-msm8x74.c
index d5fe62992849..238c83f6ec4f 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm8x74.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm8x74.c
@@ -1045,6 +1045,16 @@ static const struct msm_pingroup msm8x74_groups[] = {
 
 #define NUM_GPIO_PINGROUPS 146
 
+static const struct msm_gpio_wakeirq_map msm8x74_mpm_map[] = {
+	{ 1, 4 }, { 5, 5 }, { 9, 6 }, { 18, 7 }, { 20, 8 }, { 24, 9 },
+	{ 27, 10 }, { 28, 11 }, { 34, 12 }, { 35, 13 }, { 37, 14 }, { 42, 15 },
+	{ 44, 16 }, { 46, 17 }, { 50, 18 }, { 54, 19 }, { 59, 20 }, { 61, 21 },
+	{ 62, 22 }, { 64, 23 }, { 65, 24 }, { 66, 25 }, { 67, 26 }, { 68, 27 },
+	{ 71, 28 }, { 72, 29 }, { 73, 30 }, { 74, 31 }, { 75, 32 }, { 77, 33 },
+	{ 79, 34 }, { 80, 35 }, { 82, 36 }, { 86, 37 }, { 92, 38 }, { 93, 39 },
+	{ 95, 40 }, { 102, 3 }, { 144, 41 },
+};
+
 static const struct msm_pinctrl_soc_data msm8x74_pinctrl = {
 	.pins = msm8x74_pins,
 	.npins = ARRAY_SIZE(msm8x74_pins),
@@ -1053,6 +1063,8 @@ static const struct msm_pinctrl_soc_data msm8x74_pinctrl = {
 	.groups = msm8x74_groups,
 	.ngroups = ARRAY_SIZE(msm8x74_groups),
 	.ngpios = NUM_GPIO_PINGROUPS,
+	.wakeirq_map = msm8x74_mpm_map,
+	.nwakeirq_map = ARRAY_SIZE(msm8x74_mpm_map),
 };
 
 static int msm8x74_pinctrl_probe(struct platform_device *pdev)
-- 
2.39.2

Re: [PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Luca Weiss]

Hi Matti,

On Samstag, 23. September 2023 00:40:26 CEST Matti Lehtimäki wrote:
> Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
> through MPM-connected pins.
> 
> Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> ---
>  drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> b/drivers/pinctrl/qcom/pinctrl-msm8226.c index 994619840a70..1e46a9ab382f
> 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
> @@ -612,6 +612,16 @@ static const struct msm_pingroup msm8226_groups[] = {
> 
>  #define NUM_GPIO_PINGROUPS 117
> 
> +static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
> +	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 },

I'm not really convinced this is the correct order of values...

Let's look at downstream:

  qcom,gpio-map = <3  1>,
                  <4  4 >,
                  <5  5 >,
                  <6  9 >,
                  [...]

From Documentation/devicetree/bindings/arm/msm/mpm.txt downstream:

  Each tuple represents a MPM pin and which GIC interrupt is routed to it.

So first is pin number, second is interrupt number.

And check mainline: 

  /**
   * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
   * @gpio:          The GPIOs that are wakeup capable
   * @wakeirq:       The interrupt at the always-on interrupt controller
   */
  struct msm_gpio_wakeirq_map {
  	unsigned int gpio;
  	unsigned int wakeirq;
  };

So here we also have the order pin-interrupt, not the reverse order.

Therefore I believe the order in this patch is incorrect, and it should rather 
be:

  { 3, 1 }, { 4, 4 }, { 5, 5 }, { 6, 9 }, { 7, 13 }, { 8, 17 },
  [...]

Or do you think I'm missing something?

Regards
Luca

> +	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, { 35, 14 
},
> +	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 }, { 48, 20 
},
> +	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 }, { 62, 26 
},
> +	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 }, { 68, 32 
},
> +	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 },
> +	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 55 },
> +};
> +
>  static const struct msm_pinctrl_soc_data msm8226_pinctrl = {
>  	.pins = msm8226_pins,
>  	.npins = ARRAY_SIZE(msm8226_pins),
> @@ -620,6 +630,8 @@ static const struct msm_pinctrl_soc_data msm8226_pinctrl
> = { .groups = msm8226_groups,
>  	.ngroups = ARRAY_SIZE(msm8226_groups),
>  	.ngpios = NUM_GPIO_PINGROUPS,
> +	.wakeirq_map = msm8226_mpm_map,
> +	.nwakeirq_map = ARRAY_SIZE(msm8226_mpm_map),
>  };
> 
>  static int msm8226_pinctrl_probe(struct platform_device *pdev)

Re: [PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Stephan Gerhold]

On Sat, Sep 23, 2023 at 11:32:47AM +0200, Luca Weiss wrote:
> Hi Matti,
> 
> On Samstag, 23. September 2023 00:40:26 CEST Matti Lehtimäki wrote:
> > Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
> > through MPM-connected pins.
> > 
> > Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> > ---
> >  drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > b/drivers/pinctrl/qcom/pinctrl-msm8226.c index 994619840a70..1e46a9ab382f
> > 100644
> > --- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > +++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > @@ -612,6 +612,16 @@ static const struct msm_pingroup msm8226_groups[] = {
> > 
> >  #define NUM_GPIO_PINGROUPS 117
> > 
> > +static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
> > +	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 },
> 
> I'm not really convinced this is the correct order of values...
> 
> Let's look at downstream:
> 
>   qcom,gpio-map = <3  1>,
>                   <4  4 >,
>                   <5  5 >,
>                   <6  9 >,
>                   [...]
> 
> From Documentation/devicetree/bindings/arm/msm/mpm.txt downstream:
> 
>   Each tuple represents a MPM pin and which GIC interrupt is routed to it.
> 
> So first is pin number, second is interrupt number.
> 
> And check mainline: 
> 
>   /**
>    * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
>    * @gpio:          The GPIOs that are wakeup capable
>    * @wakeirq:       The interrupt at the always-on interrupt controller
>    */
>   struct msm_gpio_wakeirq_map {
>   	unsigned int gpio;
>   	unsigned int wakeirq;
>   };
> 
> So here we also have the order pin-interrupt, not the reverse order.
> 
> Therefore I believe the order in this patch is incorrect, and it should rather 
> be:
> 
>   { 3, 1 }, { 4, 4 }, { 5, 5 }, { 6, 9 }, { 7, 13 }, { 8, 17 },
>   [...]
> 
> Or do you think I'm missing something?
> 

Yes :)

Let's look at the later entries:

> > +	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, { 35, 14 
> },
> > +	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 }, { 48, 20 
> },
> > +	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 }, { 62, 26 
> },
> > +	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 }, { 68, 32 
> },
> > +	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 },
> > +	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 55 },
> > +};
> > +

For example: { 113, 55 }, i.e. { .gpio = 113, .wakeirq = 55 }.

MSM8226 has GPIOs 0-116 and 64 MPM pins/interrupts. The order in this
patch is the only one that can be correct because the definition would
be invalid the other way around. 113 must be the GPIO number because it
is larger than the 64 available MPM interrupt pins. :)

Thanks,
Stephan

Re: [PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Luca Weiss]

On Samstag, 23. September 2023 12:00:52 CEST Stephan Gerhold wrote:
> On Sat, Sep 23, 2023 at 11:32:47AM +0200, Luca Weiss wrote:
> > Hi Matti,
> > 
> > On Samstag, 23. September 2023 00:40:26 CEST Matti Lehtimäki wrote:
> > > Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
> > > through MPM-connected pins.
> > > 
> > > Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> > > ---
> > > 
> > >  drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
> > >  1 file changed, 12 insertions(+)
> > > 
> > > diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > b/drivers/pinctrl/qcom/pinctrl-msm8226.c index
> > > 994619840a70..1e46a9ab382f
> > > 100644
> > > --- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > +++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > @@ -612,6 +612,16 @@ static const struct msm_pingroup msm8226_groups[] =
> > > {
> > > 
> > >  #define NUM_GPIO_PINGROUPS 117
> > > 
> > > +static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
> > > +	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 },
> > 
> > I'm not really convinced this is the correct order of values...
> > 
> > Let's look at downstream:
> >   qcom,gpio-map = <3  1>,
> >   
> >                   <4  4 >,
> >                   <5  5 >,
> >                   <6  9 >,
> >                   [...]
> > 
> > From Documentation/devicetree/bindings/arm/msm/mpm.txt downstream:
> >   Each tuple represents a MPM pin and which GIC interrupt is routed to it.
> > 
> > So first is pin number, second is interrupt number.
> > 
> > And check mainline:
> >   /**
> >   
> >    * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
> >    * @gpio:          The GPIOs that are wakeup capable
> >    * @wakeirq:       The interrupt at the always-on interrupt controller
> >    */
> >   
> >   struct msm_gpio_wakeirq_map {
> >   
> >   	unsigned int gpio;
> >   	unsigned int wakeirq;
> >   
> >   };
> > 
> > So here we also have the order pin-interrupt, not the reverse order.
> > 
> > Therefore I believe the order in this patch is incorrect, and it should
> > rather> 
> > be:
> >   { 3, 1 }, { 4, 4 }, { 5, 5 }, { 6, 9 }, { 7, 13 }, { 8, 17 },
> >   [...]
> > 
> > Or do you think I'm missing something?
> 
> Yes :)
> 
> Let's look at the later entries:
> > > +	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, { 35, 14
> > 
> > },
> > 
> > > +	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 }, { 48, 20
> > 
> > },
> > 
> > > +	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 }, { 62, 26
> > 
> > },
> > 
> > > +	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 }, { 68, 32
> > 
> > },
> > 
> > > +	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 },
> > > +	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 55 },
> > > +};
> > > +
> 
> For example: { 113, 55 }, i.e. { .gpio = 113, .wakeirq = 55 }.
> 
> MSM8226 has GPIOs 0-116 and 64 MPM pins/interrupts. The order in this
> patch is the only one that can be correct because the definition would
> be invalid the other way around. 113 must be the GPIO number because it
> is larger than the 64 available MPM interrupt pins. :)

So basically you're saying downstream is wrong / buggy?

From qcom,gpio-map = [...], <55 113>; it's taking the properties like this
(drivers/soc/qcom/mpm-of.c):

  unsigned long pin = be32_to_cpup(list++);
  irq_hw_number_t hwirq = be32_to_cpup(list++);

Your explanation does make sense I guess but somewhere the link downstream -> 
mainline must be broken, no?

Regards
Luca


> 
> Thanks,
> Stephan

Re: [PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Stephan Gerhold]

On Sat, Sep 23, 2023 at 01:19:46PM +0200, Luca Weiss wrote:
> On Samstag, 23. September 2023 12:00:52 CEST Stephan Gerhold wrote:
> > On Sat, Sep 23, 2023 at 11:32:47AM +0200, Luca Weiss wrote:
> > > Hi Matti,
> > > 
> > > On Samstag, 23. September 2023 00:40:26 CEST Matti Lehtimäki wrote:
> > > > Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
> > > > through MPM-connected pins.
> > > > 
> > > > Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> > > > ---
> > > > 
> > > >  drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
> > > >  1 file changed, 12 insertions(+)
> > > > 
> > > > diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > b/drivers/pinctrl/qcom/pinctrl-msm8226.c index
> > > > 994619840a70..1e46a9ab382f
> > > > 100644
> > > > --- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > +++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > @@ -612,6 +612,16 @@ static const struct msm_pingroup msm8226_groups[] =
> > > > {
> > > > 
> > > >  #define NUM_GPIO_PINGROUPS 117
> > > > 
> > > > +static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
> > > > +	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 },
> > > 
> > > I'm not really convinced this is the correct order of values...
> > > 
> > > Let's look at downstream:
> > >   qcom,gpio-map = <3  1>,
> > >   
> > >                   <4  4 >,
> > >                   <5  5 >,
> > >                   <6  9 >,
> > >                   [...]
> > > 
> > > From Documentation/devicetree/bindings/arm/msm/mpm.txt downstream:
> > >   Each tuple represents a MPM pin and which GIC interrupt is routed to it.
> > > 
> > > So first is pin number, second is interrupt number.
> > > 
> > > And check mainline:
> > >   /**
> > >   
> > >    * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
> > >    * @gpio:          The GPIOs that are wakeup capable
> > >    * @wakeirq:       The interrupt at the always-on interrupt controller
> > >    */
> > >   
> > >   struct msm_gpio_wakeirq_map {
> > >   
> > >   	unsigned int gpio;
> > >   	unsigned int wakeirq;
> > >   
> > >   };
> > > 
> > > So here we also have the order pin-interrupt, not the reverse order.
> > > 
> > > Therefore I believe the order in this patch is incorrect, and it should
> > > rather> 
> > > be:
> > >   { 3, 1 }, { 4, 4 }, { 5, 5 }, { 6, 9 }, { 7, 13 }, { 8, 17 },
> > >   [...]
> > > 
> > > Or do you think I'm missing something?
> > 
> > Yes :)
> > 
> > Let's look at the later entries:
> > > > +	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, { 35, 14
> > > 
> > > },
> > > 
> > > > +	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 }, { 48, 20
> > > 
> > > },
> > > 
> > > > +	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 }, { 62, 26
> > > 
> > > },
> > > 
> > > > +	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 }, { 68, 32
> > > 
> > > },
> > > 
> > > > +	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 },
> > > > +	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 55 },
> > > > +};
> > > > +
> > 
> > For example: { 113, 55 }, i.e. { .gpio = 113, .wakeirq = 55 }.
> > 
> > MSM8226 has GPIOs 0-116 and 64 MPM pins/interrupts. The order in this
> > patch is the only one that can be correct because the definition would
> > be invalid the other way around. 113 must be the GPIO number because it
> > is larger than the 64 available MPM interrupt pins. :)
> 
> So basically you're saying downstream is wrong / buggy?
> 

"Misleading" or "confusing" would be the words I would use. :-)

> From qcom,gpio-map = [...], <55 113>; it's taking the properties like this
> (drivers/soc/qcom/mpm-of.c):
> 
>   unsigned long pin = be32_to_cpup(list++);
>   irq_hw_number_t hwirq = be32_to_cpup(list++);
> 
> Your explanation does make sense I guess but somewhere the link downstream -> 
> mainline must be broken, no?
> 

After staring at mpm-of.c for a while I would say that there:
 - downstream "pin" = MPM pin = mainline "wakeirq"
   - because this is used as index to msm_mpm_irqs_m2a, which has a size
     of MSM_MPM_NR_MPM_IRQS (64)
 - downstream "hwirq" = GPIO / GIC IRQ = mainline "gpio"

This means for <55 113>: pin = wakeirq = 55 and hwirq = gpio = 113.
Which matches the definition in this patch:
  { .gpio = 113, .wakeirq = 55 } = { 113, 55 }

Stephan

Re: [PATCH 1/2] pinctrl: qcom: msm8226: Add MPM pin mappings

[Luca Weiss]

On Samstag, 23. September 2023 13:35:25 CEST Stephan Gerhold wrote:
> On Sat, Sep 23, 2023 at 01:19:46PM +0200, Luca Weiss wrote:
> > On Samstag, 23. September 2023 12:00:52 CEST Stephan Gerhold wrote:
> > > On Sat, Sep 23, 2023 at 11:32:47AM +0200, Luca Weiss wrote:
> > > > Hi Matti,
> > > > 
> > > > On Samstag, 23. September 2023 00:40:26 CEST Matti Lehtimäki wrote:
> > > > > Add pin <-> wakeirq mappings to allow for waking up the AP from
> > > > > sleep
> > > > > through MPM-connected pins.
> > > > > 
> > > > > Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> > > > > ---
> > > > > 
> > > > >  drivers/pinctrl/qcom/pinctrl-msm8226.c | 12 ++++++++++++
> > > > >  1 file changed, 12 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > > b/drivers/pinctrl/qcom/pinctrl-msm8226.c index
> > > > > 994619840a70..1e46a9ab382f
> > > > > 100644
> > > > > --- a/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > > +++ b/drivers/pinctrl/qcom/pinctrl-msm8226.c
> > > > > @@ -612,6 +612,16 @@ static const struct msm_pingroup
> > > > > msm8226_groups[] =
> > > > > {
> > > > > 
> > > > >  #define NUM_GPIO_PINGROUPS 117
> > > > > 
> > > > > +static const struct msm_gpio_wakeirq_map msm8226_mpm_map[] = {
> > > > > +	{ 1, 3 }, { 4, 4 }, { 5, 5 }, { 9, 6 }, { 13, 7 }, { 17, 8 
},
> > > > 
> > > > I'm not really convinced this is the correct order of values...
> > > > 
> > > > Let's look at downstream:
> > > >   qcom,gpio-map = <3  1>,
> > > >   
> > > >                   <4  4 >,
> > > >                   <5  5 >,
> > > >                   <6  9 >,
> > > >                   [...]
> > > > 
> > > > From Documentation/devicetree/bindings/arm/msm/mpm.txt downstream:
> > > >   Each tuple represents a MPM pin and which GIC interrupt is routed to
> > > >   it.
> > > > 
> > > > So first is pin number, second is interrupt number.
> > > > 
> > > > And check mainline:
> > > >   /**
> > > >   
> > > >    * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
> > > >    * @gpio:          The GPIOs that are wakeup capable
> > > >    * @wakeirq:       The interrupt at the always-on interrupt
> > > >    controller
> > > >    */
> > > >   
> > > >   struct msm_gpio_wakeirq_map {
> > > >   
> > > >   	unsigned int gpio;
> > > >   	unsigned int wakeirq;
> > > >   
> > > >   };
> > > > 
> > > > So here we also have the order pin-interrupt, not the reverse order.
> > > > 
> > > > Therefore I believe the order in this patch is incorrect, and it
> > > > should
> > > > rather>
> > > > 
> > > > be:
> > > >   { 3, 1 }, { 4, 4 }, { 5, 5 }, { 6, 9 }, { 7, 13 }, { 8, 17 },
> > > >   [...]
> > > > 
> > > > Or do you think I'm missing something?
> > > 
> > > Yes :)
> > > 
> > > Let's look at the later entries:
> > > > > +	{ 21, 9 }, { 27, 10 }, { 29, 11 }, { 31, 12 }, { 33, 13 }, 
{ 35,
> > > > > 14
> > > > 
> > > > },
> > > > 
> > > > > +	{ 37, 15 }, { 38, 16 }, { 39, 17 }, { 41, 18 }, { 46, 19 
}, { 48,
> > > > > 20
> > > > 
> > > > },
> > > > 
> > > > > +	{ 49, 21 }, { 50, 22 }, { 51, 23 }, { 52, 24 }, { 54, 25 
}, { 62,
> > > > > 26
> > > > 
> > > > },
> > > > 
> > > > > +	{ 63, 27 }, { 64, 28 }, { 65, 29 }, { 66, 30 }, { 67, 31 
}, { 68,
> > > > > 32
> > > > 
> > > > },
> > > > 
> > > > > +	{ 69, 33 }, { 71, 34 }, { 72, 35 }, { 106, 36 }, { 107, 37 
},
> > > > > +	{ 108, 38 }, { 109, 39 }, { 110, 40 }, { 111, 54 }, { 113, 
55 },
> > > > > +};
> > > > > +
> > > 
> > > For example: { 113, 55 }, i.e. { .gpio = 113, .wakeirq = 55 }.
> > > 
> > > MSM8226 has GPIOs 0-116 and 64 MPM pins/interrupts. The order in this
> > > patch is the only one that can be correct because the definition would
> > > be invalid the other way around. 113 must be the GPIO number because it
> > > is larger than the 64 available MPM interrupt pins. :)
> > 
> > So basically you're saying downstream is wrong / buggy?
> 
> "Misleading" or "confusing" would be the words I would use. :-)

;)

> 
> > From qcom,gpio-map = [...], <55 113>; it's taking the properties like this
> > 
> > (drivers/soc/qcom/mpm-of.c):
> >   unsigned long pin = be32_to_cpup(list++);
> >   irq_hw_number_t hwirq = be32_to_cpup(list++);
> > 
> > Your explanation does make sense I guess but somewhere the link downstream
> > -> mainline must be broken, no?
> 
> After staring at mpm-of.c for a while I would say that there:
>  - downstream "pin" = MPM pin = mainline "wakeirq"
>    - because this is used as index to msm_mpm_irqs_m2a, which has a size
>      of MSM_MPM_NR_MPM_IRQS (64)
>  - downstream "hwirq" = GPIO / GIC IRQ = mainline "gpio"
> 
> This means for <55 113>: pin = wakeirq = 55 and hwirq = gpio = 113.
> Which matches the definition in this patch:
>   { .gpio = 113, .wakeirq = 55 } = { 113, 55 }

Fun, thanks for digging into it!

@Matti: I think I see one missing entry here "<41  115>," on downstream, so
{ 115, 41 } appears to be missing in this patch? Or is there a reason you 
omitted that one? The rest looks correct :)

Regards
Luca


> 
> Stephan

Re: [PATCH 2/2] pinctrl: qcom: msm8974: Add MPM pin mappings

[Luca Weiss]

On Samstag, 23. September 2023 00:40:27 CEST Matti Lehtimäki wrote:
> Add pin <-> wakeirq mappings to allow for waking up the AP from sleep
> through MPM-connected pins.
> 
> Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>

Based on the discussion in the 8226 patch, this looks correct, compared with 
downstream arch/arm/boot/dts/msm8974pro-pm.dtsi.

Reviewed-by: Luca Weiss <luca@z3ntu.xyz>

> ---
>  drivers/pinctrl/qcom/pinctrl-msm8x74.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm8x74.c
> b/drivers/pinctrl/qcom/pinctrl-msm8x74.c index d5fe62992849..238c83f6ec4f
> 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm8x74.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm8x74.c
> @@ -1045,6 +1045,16 @@ static const struct msm_pingroup msm8x74_groups[] = {
> 
>  #define NUM_GPIO_PINGROUPS 146
> 
> +static const struct msm_gpio_wakeirq_map msm8x74_mpm_map[] = {
> +	{ 1, 4 }, { 5, 5 }, { 9, 6 }, { 18, 7 }, { 20, 8 }, { 24, 9 },
> +	{ 27, 10 }, { 28, 11 }, { 34, 12 }, { 35, 13 }, { 37, 14 }, { 42, 15 
},
> +	{ 44, 16 }, { 46, 17 }, { 50, 18 }, { 54, 19 }, { 59, 20 }, { 61, 21 
},
> +	{ 62, 22 }, { 64, 23 }, { 65, 24 }, { 66, 25 }, { 67, 26 }, { 68, 27 
},
> +	{ 71, 28 }, { 72, 29 }, { 73, 30 }, { 74, 31 }, { 75, 32 }, { 77, 33 
},
> +	{ 79, 34 }, { 80, 35 }, { 82, 36 }, { 86, 37 }, { 92, 38 }, { 93, 39 
},
> +	{ 95, 40 }, { 102, 3 }, { 144, 41 },
> +};
> +
>  static const struct msm_pinctrl_soc_data msm8x74_pinctrl = {
>  	.pins = msm8x74_pins,
>  	.npins = ARRAY_SIZE(msm8x74_pins),
> @@ -1053,6 +1063,8 @@ static const struct msm_pinctrl_soc_data
> msm8x74_pinctrl = { .groups = msm8x74_groups,
>  	.ngroups = ARRAY_SIZE(msm8x74_groups),
>  	.ngpios = NUM_GPIO_PINGROUPS,
> +	.wakeirq_map = msm8x74_mpm_map,
> +	.nwakeirq_map = ARRAY_SIZE(msm8x74_mpm_map),
>  };
> 
>  static int msm8x74_pinctrl_probe(struct platform_device *pdev)