* [PATCH] soc: xilinx: Set CAP_UNUSABLE requirement for versal while powering down domain
@ 2019-08-08 19:00 Jolly Shah
2019-08-14 7:32 ` Michal Simek
0 siblings, 1 reply; 2+ messages in thread
From: Jolly Shah @ 2019-08-08 19:00 UTC (permalink / raw)
To: matthias.bgg, andy.gross, shawnguo, geert+renesas,
bjorn.andersson, sean.wang, m.szyprowski, michal.simek
Cc: Tejas Patel, Jolly Shah, rajanv, linux-kernel, linux-arm-kernel
From: Tejas Patel <tejas.patel@xilinx.com>
For "0" requirement which is used to inform firmware that
device is not required currently by master, Versal LibPM disables
clock, power it down and reset the device. genpd_power_off()
is being called during runtime suspend also. So, if any device
goes to runtime suspend state during resumes it needs to be
re-initialized again. It is possible that drivers do not
reinitialize device upon resume from runtime suspend every time.
In LibPM new PM_CAP_UNUSABLE capability is added, which disables
clock only and avoids power down and reset.
So, set CAPABILITY_UNUSABLE requirement during zynqmp_gpd_power_off()
if platform is other than zynqmp.
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
---
drivers/soc/xilinx/zynqmp_pm_domains.c | 10 ++++++++--
include/linux/firmware/xlnx-zynqmp.h | 3 ++-
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/soc/xilinx/zynqmp_pm_domains.c b/drivers/soc/xilinx/zynqmp_pm_domains.c
index 600f57c..23d90cb 100644
--- a/drivers/soc/xilinx/zynqmp_pm_domains.c
+++ b/drivers/soc/xilinx/zynqmp_pm_domains.c
@@ -2,7 +2,7 @@
/*
* ZynqMP Generic PM domain support
*
- * Copyright (C) 2015-2018 Xilinx, Inc.
+ * Copyright (C) 2015-2019 Xilinx, Inc.
*
* Davorin Mista <davorin.mista@aggios.com>
* Jolly Shah <jollys@xilinx.com>
@@ -25,6 +25,8 @@
static const struct zynqmp_eemi_ops *eemi_ops;
+static int min_capability;
+
/**
* struct zynqmp_pm_domain - Wrapper around struct generic_pm_domain
* @gpd: Generic power domain
@@ -106,7 +108,7 @@ static int zynqmp_gpd_power_off(struct generic_pm_domain *domain)
int ret;
struct pm_domain_data *pdd, *tmp;
struct zynqmp_pm_domain *pd;
- u32 capabilities = 0;
+ u32 capabilities = min_capability;
bool may_wakeup;
if (!eemi_ops->set_requirement)
@@ -283,6 +285,10 @@ static int zynqmp_gpd_probe(struct platform_device *pdev)
if (!domains)
return -ENOMEM;
+ if (!of_device_is_compatible(dev->parent->of_node,
+ "xlnx,zynqmp-firmware"))
+ min_capability = ZYNQMP_PM_CAPABILITY_UNUSABLE;
+
for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++, pd++) {
pd->node_id = 0;
pd->gpd.name = kasprintf(GFP_KERNEL, "domain%d", i);
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 778abbb..b8a7c22 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -2,7 +2,7 @@
/*
* Xilinx Zynq MPSoC Firmware layer
*
- * Copyright (C) 2014-2018 Xilinx
+ * Copyright (C) 2014-2019 Xilinx
*
* Michal Simek <michal.simek@xilinx.com>
* Davorin Mista <davorin.mista@aggios.com>
@@ -46,6 +46,7 @@
#define ZYNQMP_PM_CAPABILITY_ACCESS 0x1U
#define ZYNQMP_PM_CAPABILITY_CONTEXT 0x2U
#define ZYNQMP_PM_CAPABILITY_WAKEUP 0x4U
+#define ZYNQMP_PM_CAPABILITY_UNUSABLE 0x8U
/*
* Firmware FPGA Manager flags
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] soc: xilinx: Set CAP_UNUSABLE requirement for versal while powering down domain
2019-08-08 19:00 [PATCH] soc: xilinx: Set CAP_UNUSABLE requirement for versal while powering down domain Jolly Shah
@ 2019-08-14 7:32 ` Michal Simek
0 siblings, 0 replies; 2+ messages in thread
From: Michal Simek @ 2019-08-14 7:32 UTC (permalink / raw)
To: Jolly Shah, matthias.bgg, andy.gross, shawnguo, geert+renesas,
bjorn.andersson, sean.wang, m.szyprowski, michal.simek
Cc: Tejas Patel, Jolly Shah, rajanv, linux-kernel, linux-arm-kernel
On 08. 08. 19 21:00, Jolly Shah wrote:
> From: Tejas Patel <tejas.patel@xilinx.com>
>
> For "0" requirement which is used to inform firmware that
> device is not required currently by master, Versal LibPM disables
This could be the first time when LibPM is mentioned in connection to
Versal. That's why you should also say what's that and when it runs to
make it clear.
> clock, power it down and reset the device. genpd_power_off()
> is being called during runtime suspend also. So, if any device
> goes to runtime suspend state during resumes it needs to be
> re-initialized again. It is possible that drivers do not
> reinitialize device upon resume from runtime suspend every time.
>
> In LibPM new PM_CAP_UNUSABLE capability is added, which disables
> clock only and avoids power down and reset.
> So, set CAPABILITY_UNUSABLE requirement during zynqmp_gpd_power_off()
> if platform is other than zynqmp.
>
> Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
> Signed-off-by: Jolly Shah <jollys@xilinx.com>
> ---
> drivers/soc/xilinx/zynqmp_pm_domains.c | 10 ++++++++--
> include/linux/firmware/xlnx-zynqmp.h | 3 ++-
> 2 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/soc/xilinx/zynqmp_pm_domains.c b/drivers/soc/xilinx/zynqmp_pm_domains.c
> index 600f57c..23d90cb 100644
> --- a/drivers/soc/xilinx/zynqmp_pm_domains.c
> +++ b/drivers/soc/xilinx/zynqmp_pm_domains.c
> @@ -2,7 +2,7 @@
> /*
> * ZynqMP Generic PM domain support
> *
> - * Copyright (C) 2015-2018 Xilinx, Inc.
> + * Copyright (C) 2015-2019 Xilinx, Inc.
> *
> * Davorin Mista <davorin.mista@aggios.com>
> * Jolly Shah <jollys@xilinx.com>
> @@ -25,6 +25,8 @@
>
> static const struct zynqmp_eemi_ops *eemi_ops;
>
> +static int min_capability;
> +
> /**
> * struct zynqmp_pm_domain - Wrapper around struct generic_pm_domain
> * @gpd: Generic power domain
> @@ -106,7 +108,7 @@ static int zynqmp_gpd_power_off(struct generic_pm_domain *domain)
> int ret;
> struct pm_domain_data *pdd, *tmp;
> struct zynqmp_pm_domain *pd;
> - u32 capabilities = 0;
> + u32 capabilities = min_capability;
> bool may_wakeup;
>
> if (!eemi_ops->set_requirement)
> @@ -283,6 +285,10 @@ static int zynqmp_gpd_probe(struct platform_device *pdev)
> if (!domains)
> return -ENOMEM;
>
> + if (!of_device_is_compatible(dev->parent->of_node,
> + "xlnx,zynqmp-firmware"))
> + min_capability = ZYNQMP_PM_CAPABILITY_UNUSABLE;
> +
> for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++, pd++) {
> pd->node_id = 0;
> pd->gpd.name = kasprintf(GFP_KERNEL, "domain%d", i);
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index 778abbb..b8a7c22 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -2,7 +2,7 @@
> /*
> * Xilinx Zynq MPSoC Firmware layer
> *
> - * Copyright (C) 2014-2018 Xilinx
> + * Copyright (C) 2014-2019 Xilinx
> *
> * Michal Simek <michal.simek@xilinx.com>
> * Davorin Mista <davorin.mista@aggios.com>
> @@ -46,6 +46,7 @@
> #define ZYNQMP_PM_CAPABILITY_ACCESS 0x1U
> #define ZYNQMP_PM_CAPABILITY_CONTEXT 0x2U
> #define ZYNQMP_PM_CAPABILITY_WAKEUP 0x4U
> +#define ZYNQMP_PM_CAPABILITY_UNUSABLE 0x8U
Please align it with other macros (or fix that macros).
Other then two small nits patch is fine.
Thanks,
Michal
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-08-14 7:33 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-08 19:00 [PATCH] soc: xilinx: Set CAP_UNUSABLE requirement for versal while powering down domain Jolly Shah
2019-08-14 7:32 ` Michal Simek
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).