From 63c20c7c0b5cb7606f4c22751329776f490bec66 Mon Sep 17 00:00:00 2001
From: Taniya Das <tdas@codeaurora.org>
Date: Wed, 15 Jun 2016 12:15:01 +0530
Subject: [PATCH] clk: Add support to set custom flags with clk_set_flags

The new API clk_set_flags could be used by hardware specific clock drivers
or clients for specific hardware requirements. These flags could be custom
defined as per hardware needs.

Change-Id: Ia67373ee2b8934c898052c68338fa86cb16070dd
Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
 drivers/clk/clk.c            | 12 ++++++++++++
 include/linux/clk-provider.h |  3 +++
 include/linux/clk.h          | 10 ++++++++++
 3 files changed, 25 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 820a939fb6bb..1cff20e70fba 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1982,6 +1982,18 @@ bool clk_is_match(const struct clk *p, const struct clk *q)
 }
 EXPORT_SYMBOL_GPL(clk_is_match);
 
+int clk_set_flags(struct clk *clk, unsigned long flags)
+{
+	if (!clk)
+		return 0;
+
+	if (!clk->core->ops->set_flags)
+		return -EINVAL;
+
+	return clk->core->ops->set_flags(clk->core->hw, flags);
+}
+EXPORT_SYMBOL_GPL(clk_set_flags);
+
 /***        debugfs support        ***/
 
 #ifdef CONFIG_DEBUG_FS
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index a39c0c530778..1f8224748b7d 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -177,6 +177,8 @@ struct clk_rate_request {
  *		directory is provided as an argument.  Called with
  *		prepare_lock held.  Returns 0 on success, -EERROR otherwise.
  *
+ * @set_flags: Set custom flags which deal with hardware specifics. Returns 0
+ *	       on success, -EERROR otherwise.
  *
  * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
  * implementations to split any work between atomic (enable) and sleepable
@@ -217,6 +219,7 @@ struct clk_ops {
 	int		(*set_phase)(struct clk_hw *hw, int degrees);
 	void		(*init)(struct clk_hw *hw);
 	int		(*debug_init)(struct clk_hw *hw, struct dentry *dentry);
+	int		(*set_flags)(struct clk_hw *hw, unsigned int flags);
 };
 
 /**
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 123c02788807..1325b23ff3e8 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -420,6 +420,16 @@ struct clk *clk_get_parent(struct clk *clk);
  */
 struct clk *clk_get_sys(const char *dev_id, const char *con_id);
 
+/**
+ * clk_set_flags - set the custom HW specific flags for this clock
+ * @clk: clock source
+ * @flags: custom flags which would be hardware specific, defined for specific
+ *	   hardware.
+ *
+ * Returns success 0 or negative errno.
+ */
+int clk_set_flags(struct clk *clk, unsigned long flags);
+
 #else /* !CONFIG_HAVE_CLK */
 
 static inline struct clk *clk_get(struct device *dev, const char *id)