clk: qcom: Revert sync_state based clk_disable_unused

Revert the postponement of clk_disable_unused() for clock providers that
implement sync_state, and the change to drivers implementing this, until
agreement on the implementation has been reached.

This reverts:
29e3141 ("clk: qcom: Remove need for clk_ignore_unused on sc8280xp")
99c0f7d ("clk: qcom: sdm845: Use generic clk_sync_state_disable_unused callback")
26b36df ("clk: Add generic sync_state callback for disabling unused clocks")

Requested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: andersson

drivers/clk/clk.c

@@ -1302,26 +1302,14 @@ static void clk_core_disable_unprepare(struct clk_core *core)
 	clk_core_unprepare_lock(core);
 }
 
-static void clk_unprepare_unused_subtree(struct clk_core *core,
-						struct device *dev)
+static void __init clk_unprepare_unused_subtree(struct clk_core *core)
 {
-	bool from_sync_state = !!dev;
 	struct clk_core *child;
 
 	lockdep_assert_held(&prepare_lock);
 
 	hlist_for_each_entry(child, &core->children, child_node)
-		clk_unprepare_unused_subtree(child, dev);
-
-	if (from_sync_state && core->dev != dev)
-		return;
-
-	/*
-	 * clock will be unprepared on sync_state,
-	 * so leave as is for now
-	 */
-	if (!from_sync_state && dev_has_sync_state(core->dev))
-		return;
+		clk_unprepare_unused_subtree(child);
 
 	if (core->prepare_count)
 		return;
@@ -1344,27 +1332,15 @@ static void clk_unprepare_unused_subtree(struct clk_core *core,
 	clk_pm_runtime_put(core);
 }
 
-static void clk_disable_unused_subtree(struct clk_core *core,
-					struct device *dev)
+static void __init clk_disable_unused_subtree(struct clk_core *core)
 {
-	bool from_sync_state = !!dev;
 	struct clk_core *child;
 	unsigned long flags;
 
 	lockdep_assert_held(&prepare_lock);
 
 	hlist_for_each_entry(child, &core->children, child_node)
-		clk_disable_unused_subtree(child, dev);
-
-	if (from_sync_state && core->dev != dev)
-		return;
-
-	/*
-	 * clock will be disabled on sync_state,
-	 * so leave as is for now
-	 */
-	if (!from_sync_state && dev_has_sync_state(core->dev))
-		return;
+		clk_disable_unused_subtree(child);
 
 	if (core->flags & CLK_OPS_PARENT_ENABLE)
 		clk_core_prepare_enable(core->parent);
@@ -1402,54 +1378,43 @@ static void clk_disable_unused_subtree(struct clk_core *core,
 		clk_core_disable_unprepare(core->parent);
 }
 
-static bool clk_ignore_unused;
+static bool clk_ignore_unused __initdata;
 static int __init clk_ignore_unused_setup(char *__unused)
 {
 	clk_ignore_unused = true;
 	return 1;
 }
 __setup("clk_ignore_unused", clk_ignore_unused_setup);
 
-static void __clk_disable_unused(struct device *dev)
+static int __init clk_disable_unused(void)
 {
 	struct clk_core *core;
 
 	if (clk_ignore_unused) {
 		pr_warn("clk: Not disabling unused clocks\n");
-		return;
+		return 0;
 	}
 
 	clk_prepare_lock();
 
 	hlist_for_each_entry(core, &clk_root_list, child_node)
-		clk_disable_unused_subtree(core, dev);
+		clk_disable_unused_subtree(core);
 
 	hlist_for_each_entry(core, &clk_orphan_list, child_node)
-		clk_disable_unused_subtree(core, dev);
+		clk_disable_unused_subtree(core);
 
 	hlist_for_each_entry(core, &clk_root_list, child_node)
-		clk_unprepare_unused_subtree(core, dev);
+		clk_unprepare_unused_subtree(core);
 
 	hlist_for_each_entry(core, &clk_orphan_list, child_node)
-		clk_unprepare_unused_subtree(core, dev);
+		clk_unprepare_unused_subtree(core);
 
 	clk_prepare_unlock();
-}
-
-static int __init clk_disable_unused(void)
-{
-	__clk_disable_unused(NULL);
 
 	return 0;
 }
 late_initcall_sync(clk_disable_unused);
 
-void clk_sync_state_disable_unused(struct device *dev)
-{
-	__clk_disable_unused(dev);
-}
-EXPORT_SYMBOL_GPL(clk_sync_state_disable_unused);
-
 static int clk_core_determine_round_nolock(struct clk_core *core,
 					   struct clk_rate_request *req)
 {

drivers/clk/qcom/camcc-sdm845.c

@@ -1743,7 +1743,6 @@ static struct platform_driver cam_cc_sdm845_driver = {
 	.driver	= {
 		.name = "sdm845-camcc",
 		.of_match_table = cam_cc_sdm845_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

drivers/clk/qcom/dispcc-sc8280xp.c

@@ -3199,7 +3199,6 @@ static struct platform_driver disp_cc_sc8280xp_driver = {
 	.driver = {
 		.name = "disp_cc-sc8280xp",
 		.of_match_table = disp_cc_sc8280xp_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

drivers/clk/qcom/dispcc-sdm845.c

@@ -869,7 +869,6 @@ static struct platform_driver disp_cc_sdm845_driver = {
 	.driver		= {
 		.name	= "disp_cc-sdm845",
 		.of_match_table = disp_cc_sdm845_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

drivers/clk/qcom/gcc-sc8280xp.c

@@ -7441,7 +7441,6 @@ static struct platform_driver gcc_sc8280xp_driver = {
 	.driver = {
 		.name = "gcc-sc8280xp",
 		.of_match_table = gcc_sc8280xp_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

drivers/clk/qcom/gcc-sdm845.c

@@ -4020,7 +4020,6 @@ static struct platform_driver gcc_sdm845_driver = {
 	.driver		= {
 		.name	= "gcc-sdm845",
 		.of_match_table = gcc_sdm845_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

drivers/clk/qcom/gpucc-sdm845.c

@@ -200,7 +200,6 @@ static struct platform_driver gpu_cc_sdm845_driver = {
 	.driver = {
 		.name = "sdm845-gpucc",
 		.of_match_table = gpu_cc_sdm845_match_table,
-		.sync_state = clk_sync_state_disable_unused,
 	},
 };
 

include/linux/clk-provider.h

@@ -720,7 +720,6 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
 		void __iomem *reg, u8 shift, u8 width,
 		u8 clk_divider_flags, const struct clk_div_table *table,
 		spinlock_t *lock);
-void clk_sync_state_disable_unused(struct device *dev);
 /**
  * clk_register_divider - register a divider clock with the clock framework
  * @dev: device registering this clock