mmc: sdhci-msm: add PM QoS properties for IRQ and cpu group voting

Add the necessary device tree properties and parsing in the driver
to support PM QoS voting for IRQ and CPU groups for CMDQ / legacy modes.

Change-Id: I1a94978ca66823d2ce78ee230cf36b4ebb72e6d8
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>
[subhashj@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 25f9ad7b89d9..6c8c13f335df 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -45,6 +45,26 @@ Optional Properties:
 				    the driver will construct one based on the card
 				    supported max and min frequencies.
 				    The frequencies must be ordered from lowest to highest.
+	- qcom,pm-qos-irq-type - the PM QoS request type to be used for IRQ voting.
+	  Can be either "affine_cores" or "affine_irq". If not specified, will default
+	  to "affine_cores". Use "affine_irq" setting in case an IRQ balancer is active,
+	  and IRQ affinity changes during runtime.
+	- qcom,pm-qos-irq-cpu - specifies the CPU for which IRQ voting shall be done.
+	  If "affine_cores" was specified for property 'qcom,pm-qos-irq-type'
+	  then this property must be defined, and is not relevant otherwise.
+	- qcom,pm-qos-irq-latency - a tuple defining two latency values with which
+	  PM QoS IRQ voting shall be done. The first value is the latecy to be used
+	  when load is high (performance mode) and the second is for low loads
+	  (power saving mode).
+	- qcom,pm-qos-cpu-groups - defines cpu groups mapping.
+	  Each cell represnets a group, which is a cpu bitmask defining which cpus belong
+	  to that group.
+	- qcom,pm-qos-<mode>-latency-us - where <mode> is either "cmdq" or "legacy".
+	  An array of latency value tuples, each tuple corresponding to a cpu group in the order
+	  defined in property 'qcom,pm-qos-cpu-groups'. The first value is the latecy to be used
+	  when load is high (performance mode) and the second is for low loads
+	  (power saving mode). These values will be used for cpu group voting for
+	  command-queueing mode or legacy respectively.
 
 In the following, <supply> can be vdd (flash core voltage) or vdd-io (I/O voltage).
 	- qcom,<supply>-always-on - specifies whether supply should be kept "on" always.
@@ -122,6 +142,13 @@ Example:
 			<&msmgpio 36 0>, /* DATA2 */
 			<&msmgpio 35 0>; /* DATA3 */
 		qcom,gpio-names = "CLK", "CMD", "DAT0", "DAT1", "DAT2", "DAT3";
+
+		qcom,pm-qos-irq-type = "affine_cores";
+		qcom,pm-qos-irq-cpu = <0>;
+		qcom,pm-qos-irq-latency = <500 100>;
+		qcom,pm-qos-cpu-groups = <0x03 0x0c>;
+		qcom,pm-qos-cmdq-latency-us = <50 100>, <50 100>;
+		qcom,pm-qos-legacy-latency-us = <50 100>, <50 100>;
 	};
 
 	sdhc_2: qcom,sdhc@f98a4900 {
@@ -145,4 +172,7 @@ Example:
 		qcom,pad-pull-off = <0x0 0x3 0x3>; /* no-pull, pull-up, pull-up */
 		qcom,pad-drv-on = <0x7 0x4 0x4>; /* 16mA, 10mA, 10mA */
 		qcom,pad-drv-off = <0x0 0x0 0x0>; /* 2mA, 2mA, 2mA */
+
+		qcom,pm-qos-irq-type = "affine_irq";
+		qcom,pm-qos-irq-latency = <120 200>;
 	};