power: reset: msm: Define reg-names for the qcom,pshold device

Since the qcom,pshold device now supports up to two
distinct register definitions, add the 'reg-names' property
to assign names to the memory resources, rather than
relying on resource numbering.

Change-Id: Ie0bc5eae0119901239efae05357ae107a112b87a
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>

Documentation/devicetree/bindings/power_supply/msm-poweroff.txt

@@ -8,13 +8,19 @@ settings.
 Required Properties:
 -compatible: "qcom,pshold"
 -reg: Specifies the physical address of the ps-hold register
+      This value must correspond to "pshold-base" as defined in reg-names
+-reg-names: must contain "pshold-base"
+	    may also contain "tcsr-boot-misc-detect"
 
 Optional Properties:
 -reg: A secondary reg address/size pair may be provided, to specify the address
       of the TCSR_BOOT_MISC_DETECT register. This address is typically used to
       configure the type of reset desired. Omitting this address implies that
       the reset type shall be configured by means of a call to the secure
-      environment.
+      environment. This value must correspond to "tcsr-boot-misc-detect" as
+      defined in reg-names
+-reg-names: must contain "tcsr-boot-misc-detect" if the secondary address/size
+      pair described above is defined.
 
 Example:
 

drivers/power/reset/msm-poweroff.c

@@ -402,12 +402,13 @@ static int msm_restart_probe(struct platform_device *pdev)
 		}
 	}
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pshold-base");
 	msm_ps_hold = devm_ioremap_resource(dev, mem);
 	if (IS_ERR(msm_ps_hold))
 		return PTR_ERR(msm_ps_hold);
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "tcsr-boot-misc-detect");
 	if (mem)
 		tcsr_boot_misc_detect = mem->start;