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

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>

diff --git a/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt b/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
index f7b00a7..f541d1f 100644 (file)
--- a/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
+++ b/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
@@ -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):
 -------------

diff --git a/MAINTAINERS b/MAINTAINERS
index 6426db5..fe74064 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15853,6 +15853,7 @@ 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

diff --git a/include/dt-bindings/soc/ti,sci_pm_domain.h b/include/dt-bindings/soc/ti,sci_pm_domain.h
new file mode 100644 (file)
index 0000000..8f2a736
--- /dev/null
+++ b/include/dt-bindings/soc/ti,sci_pm_domain.h
@@ -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 */