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Commit 89ae37eb authored by Osvaldo Banuelos's avatar Osvaldo Banuelos
Browse files

clk: msm: clock-osm: support MEM-ACC threshold voltage for Silver cluster 



Add support for configuring the memory accelerator (MEM-ACC)
threshold voltage for the Silver cluster. This threshold
voltage is used to resolve the MEM-ACC crossover virtual corner
number required by the OSM sequence to program MEM-ACC settings
based on a voltage threshold.

CRs-Fixed: 1113780
Change-Id: Iba58a23ae0d30429da629afa9d5f9cb34e025543
Signed-off-by: default avatarOsvaldo Banuelos <osvaldob@codeaurora.org>
parent 1f1d9440

Documentation/devicetree/bindings/arm/msm/qcom,osm.txt

+10 −0
Original line number Diff line number Diff line
@@ -281,6 +281,16 @@ Properties: 
		    performance mode with a total of 4 tuples corresponding

		    to each supported performance mode.



- qcom,pwrcl-apcs-mem-acc-threshold-voltage

	Usage:      optional

	Value type: <u32>

	Definition: Specifies the highest MEM ACC threshold voltage in

		    microvolts for the Power cluster.  This voltage is

		    used to determine which MEM ACC setting is used for the

		    highest frequencies.  If specified, the voltage must match

		    the MEM ACC threshold voltage specified for the

		    corresponding CPRh device.



- qcom,perfcl-apcs-mem-acc-val

	Usage:      required if qcom,osm-no-tz is specified

	Value type: <prop-encoded-array>

drivers/clk/msm/clock-osm.c

+13 −3
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016, The Linux Foundation. All rights reserved.

 * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -83,6 +83,7 @@ enum clk_osm_trace_packet_id { 
#define VERSION_REG 0x0



#define OSM_TABLE_SIZE 40

#define MAX_VIRTUAL_CORNER (OSM_TABLE_SIZE - 1)

#define MAX_CLUSTER_CNT 2

#define CORE_COUNT_VAL(val) ((val & GENMASK(18, 16)) >> 16)

#define SINGLE_CORE 1
@@ -1662,6 +1663,14 @@ static int clk_osm_resolve_crossover_corners(struct clk_osm *c, 
				break;

			}

		}



		/*

		 * This assumes the OSM table uses corners

		 * 0 to MAX_VIRTUAL_CORNER - 1.

		 */

		if (!c->mem_acc_threshold_vc)

			c->mem_acc_threshold_vc =

				MAX_VIRTUAL_CORNER;

	}



	return 0;
@@ -3232,9 +3241,10 @@ static int cpu_clock_osm_driver_probe(struct platform_device *pdev) 
		return rc;

	}



	rc = clk_osm_resolve_crossover_corners(&pwrcl_clk, pdev, NULL);

	rc = clk_osm_resolve_crossover_corners(&pwrcl_clk, pdev,

			       "qcom,pwrcl-apcs-mem-acc-threshold-voltage");

	if (rc)

		dev_info(&pdev->dev, "No APM crossover corner programmed\n");

		dev_info(&pdev->dev, "No MEM-ACC crossover corner programmed\n");



	rc = clk_osm_resolve_crossover_corners(&perfcl_clk, pdev,

				"qcom,perfcl-apcs-mem-acc-threshold-voltage");