From 5e339ed58edda5a4c473973d224e464d74b66a0c Mon Sep 17 00:00:00 2001
From: Choonghoon Park <choong.park@samsung.com>
Date: Mon, 19 Mar 2018 09:42:04 +0900
Subject: [PATCH] cpufreq: acme: add API for ready callback.

Change-Id: I9b6e9041354be94b2be2a59905af7d4769aaf646
---
 drivers/cpufreq/exynos-acme.c | 26 ++++++++++++++++++++++++--
 drivers/cpufreq/exynos-acme.h | 20 ++++++++++++++++++++
 2 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/exynos-acme.c b/drivers/cpufreq/exynos-acme.c
index 0d239f6a8ee9..8bccc3485d99 100644
--- a/drivers/cpufreq/exynos-acme.c
+++ b/drivers/cpufreq/exynos-acme.c
@@ -16,7 +16,6 @@
 #include <linux/cpu.h>
 #include <linux/cpumask.h>
 #include <linux/cpufreq.h>
-#include <linux/pm_qos.h>
 #include <linux/debug-snapshot.h>
 #include <linux/pm_opp.h>
 #include <linux/cpu_cooling.h>
@@ -24,7 +23,6 @@
 #include <linux/ems.h>
 
 #include <soc/samsung/cal-if.h>
-#include <soc/samsung/exynos-dm.h>
 #include <soc/samsung/ect_parser.h>
 #include <soc/samsung/exynos-cpuhp.h>
 #include <soc/samsung/exynos-cpupm.h>
@@ -37,6 +35,11 @@
  */
 LIST_HEAD(domains);
 
+/*
+ * list head of units which have cpufreq policy dependancy
+ */
+LIST_HEAD(ready_list);
+
 /*********************************************************************
  *                          HELPER FUNCTION                          *
  *********************************************************************/
@@ -302,6 +305,17 @@ static int update_freq(struct exynos_cpufreq_domain *domain,
 	return ret;
 }
 
+/*********************************************************************
+ *                   	EXYNOS CPUFREQ DRIVER API                    *
+ *********************************************************************/
+void exynos_cpufreq_ready_list_add(struct exynos_cpufreq_ready_block *rb)
+{
+	if (!rb)
+		return;
+
+	list_add(&rb->list, &ready_list);
+}
+
 /*********************************************************************
  *                   EXYNOS CPUFREQ DRIVER INTERFACE                 *
  *********************************************************************/
@@ -485,6 +499,14 @@ static int exynos_cpufreq_resume(struct cpufreq_policy *policy)
 
 static void exynos_cpufreq_ready(struct cpufreq_policy *policy)
 {
+	struct exynos_cpufreq_ready_block *ready_block;
+
+	list_for_each_entry(ready_block, &ready_list, list) {
+		if (ready_block->update)
+			ready_block->update(policy);
+		if (ready_block->get_target)
+			ready_block->get_target(policy, exynos_cpufreq_target);
+	}
 }
 
 static int exynos_cpufreq_exit(struct cpufreq_policy *policy)
diff --git a/drivers/cpufreq/exynos-acme.h b/drivers/cpufreq/exynos-acme.h
index d4e1e5ee307f..69a5a6e164e4 100644
--- a/drivers/cpufreq/exynos-acme.h
+++ b/drivers/cpufreq/exynos-acme.h
@@ -8,11 +8,26 @@
  * Exynos ACME(A Cpufreq that Meets Every chipset) driver implementation
  */
 
+#include <linux/pm_qos.h>
+#include <soc/samsung/exynos-dm.h>
+
 struct exynos_cpufreq_dm {
 	struct list_head		list;
 	struct exynos_dm_constraint	c;
 };
 
+typedef int (*target_fn)(struct cpufreq_policy *policy,
+			        unsigned int target_freq,
+			        unsigned int relation);
+
+struct exynos_cpufreq_ready_block {
+	struct list_head		list;
+
+	/* callback function to update policy-dependant data */
+	int (*update)(struct cpufreq_policy *policy);
+	int (*get_target)(struct cpufreq_policy *policy, target_fn target);
+};
+
 struct exynos_cpufreq_domain {
 	/* list of domain */
 	struct list_head		list;
@@ -73,3 +88,8 @@ struct exynos_cpufreq_domain {
  * two frequencies in nanoseconds
  */
 #define TRANSITION_LATENCY	5000000
+
+/*
+ * Exynos CPUFreq API
+ */
+extern void exynos_cpufreq_ready_list_add(struct exynos_cpufreq_ready_block *rb);
-- 
2.20.1