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Commit fe8fee69 authored by Olof Johansson's avatar Olof Johansson
Browse files

Merge tag 'arm-soc-pmdomain' of... 

Merge tag 'arm-soc-pmdomain' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers

ARM SOC PM domain support for 4.12

Dave Gerlach (5):
      PM / Domains: Add generic data pointer to genpd data struct
      PM / Domains: Do not check if simple providers have phandle cells
      dt-bindings: Add TI SCI PM Domains
      soc: ti: Add ti_sci_pm_domains driver
      ARM: keystone: Drop PM domain support for k2g

* tag 'arm-soc-pmdomain' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone

:
  ARM: keystone: Drop PM domain support for k2g
  soc: ti: Add ti_sci_pm_domains driver
  dt-bindings: Add TI SCI PM Domains
  PM / Domains: Do not check if simple providers have phandle cells
  PM / Domains: Add generic data pointer to genpd data struct

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents 1dfe4616 ae3874cc

Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt

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+57 −0
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Texas Instruments TI-SCI Generic Power Domain

---------------------------------------------



Some TI SoCs contain a system controller (like the PMMC, etc...) that is

responsible for controlling the state of the IPs that are present.

Communication between the host processor running an OS and the system

controller happens through a protocol known as TI-SCI [1].



[1] Documentation/devicetree/bindings/arm/keystone/ti,sci.txt



PM Domain Node

==============

The PM domain node represents the global PM domain managed by the PMMC, which

in this case is the implementation as documented by the generic PM domain

bindings in Documentation/devicetree/bindings/power/power_domain.txt.  Because

this relies on the TI SCI protocol to communicate with the PMMC it must be a

child of the pmmc node.



Required Properties:

--------------------

- compatible: should be "ti,sci-pm-domain"

- #power-domain-cells: Must be 1 so that an id can be provided in each

		       device node.



Example (K2G):

-------------

	pmmc: pmmc {

		compatible = "ti,k2g-sci";

		...



		k2g_pds: power-controller {

			compatible = "ti,sci-pm-domain";

			#power-domain-cells = <1>;

		};

	};



PM Domain Consumers

===================

Hardware blocks belonging to a PM domain should contain a "power-domains"

property that is a phandle pointing to the corresponding PM domain node

along with an index representing the device id to be passed to the PMMC

for device control.



Required Properties:

--------------------

- power-domains: phandle pointing to the corresponding PM domain node

		 and an ID representing the device.



See dt-bindings/genpd/k2g.h for the list of valid identifiers for k2g.



Example (K2G):

--------------------

	uart0: serial@02530c00 {

		compatible = "ns16550a";

		...

		power-domains = <&k2g_pds K2G_DEV_UART0>;

	};

MAINTAINERS

+3 −0
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@@ -12384,6 +12384,9 @@ S: Maintained 
F:	Documentation/devicetree/bindings/arm/keystone/ti,sci.txt

F:	drivers/firmware/ti_sci*

F:	include/linux/soc/ti/ti_sci_protocol.h

F:	Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt

F:	include/dt-bindings/genpd/k2g.h

F:	drivers/soc/ti/ti_sci_pm_domains.c



THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER

M:	Hans Verkuil <hverkuil@xs4all.nl>

arch/arm/mach-keystone/Kconfig

+1 −0
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@@ -10,6 +10,7 @@ config ARCH_KEYSTONE 
	select ARCH_SUPPORTS_BIG_ENDIAN

	select ZONE_DMA if ARM_LPAE

	select PINCTRL

	select PM_GENERIC_DOMAINS if PM

	help

	  Support for boards based on the Texas Instruments Keystone family of

	  SoCs.

arch/arm/mach-keystone/pm_domain.c

+3 −1
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@@ -32,7 +32,9 @@ static struct pm_clk_notifier_block platform_domain_notifier = { 
};



static const struct of_device_id of_keystone_table[] = {

	{.compatible = "ti,keystone"},

	{.compatible = "ti,k2hk"},

	{.compatible = "ti,k2e"},

	{.compatible = "ti,k2l"},

	{ /* end of list */ },

};

drivers/base/power/domain.c

+0 −2
Original line number Diff line number Diff line
@@ -1622,8 +1622,6 @@ static struct generic_pm_domain *genpd_xlate_simple( 
					struct of_phandle_args *genpdspec,

					void *data)

{

	if (genpdspec->args_count != 0)

		return ERR_PTR(-EINVAL);

	return data;

}