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dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared access

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TISCI protocol supports for enabling the device either with exclusive
permissions for the requesting host or with sharing across the hosts.
There are certain devices which are exclusive to Linux context and
there are certain devices that are shared across different host contexts.
So add support for getting this information from DT by increasing
the power-domain cells to 2.

Acked-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Lokesh Vutla 2019-08-26 20:00:40 -07:00 committed by Arnd Bergmann
parent 45b659ee75
commit 7a800c418c
3 changed files with 19 additions and 2 deletions
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11
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
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@ -19,8 +19,15 @@ 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.
- #power-domain-cells: Can be one of the following:
1: Containing the device id of each node
2: First entry should be device id
Second entry should be one of the floowing:
TI_SCI_PD_EXCLUSIVE: To allow device to be
exclusively controlled by
the requesting hosts.
TI_SCI_PD_SHARED: To allow device to be shared
by multiple hosts.
Example (K2G):
-------------

1
MAINTAINERS
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@ -15869,6 +15869,7 @@ 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: drivers/soc/ti/ti_sci_pm_domains.c
F: include/dt-bindings/soc/ti,sci_pm_domain.h
F: Documentation/devicetree/bindings/reset/ti,sci-reset.txt
F: Documentation/devicetree/bindings/clock/ti,sci-clk.txt
F: drivers/clk/keystone/sci-clk.c

9
include/dt-bindings/soc/ti,sci_pm_domain.h Normal file
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@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __DT_BINDINGS_TI_SCI_PM_DOMAIN_H
#define __DT_BINDINGS_TI_SCI_PM_DOMAIN_H
#define TI_SCI_PD_EXCLUSIVE 1
#define TI_SCI_PD_SHARED 0
#endif /* __DT_BINDINGS_TI_SCI_PM_DOMAIN_H */