From: Jolly Shah <jolly.shah@xilinx.com>
To: <mturquette@baylibre.com>, <sboyd@codeaurora.org>,
<michal.simek@xilinx.com>, <robh+dt@kernel.org>,
<mark.rutland@arm.com>, <linux-clk@vger.kernel.org>
Cc: <rajanv@xilinx.com>, <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
Jolly Shah <jolly.shah@xilinx.com>,
Jolly Shah <jollys@xilinx.com>, Tejas Patel <tejasp@xilinx.com>,
Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Subject: [PATCH 1/3] drivers: clk: Add clk_get_children support
Date: Wed, 28 Feb 2018 14:27:39 -0800 [thread overview]
Message-ID: <1519856861-31384-2-git-send-email-jollys@xilinx.com> (raw)
In-Reply-To: <1519856861-31384-1-git-send-email-jollys@xilinx.com>
From: Jolly Shah <jolly.shah@xilinx.com>
This API helps to determine the users for any clock.
Signed-off-by: Jolly Shah <jollys@xilinx.com>
Signed-off-by: Tejas Patel <tejasp@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
---
drivers/clk/clk.c | 28 ++++++++++++++++++++++++++++
include/linux/clk-provider.h | 1 +
2 files changed, 29 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 0f686a9..947a18b 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -274,6 +274,34 @@ struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw)
}
EXPORT_SYMBOL_GPL(clk_hw_get_parent);
+static unsigned int sibling;
+
+static void clk_show_subtree(struct clk_core *c,
+ int level)
+{
+ struct clk_core *child;
+
+ if (!c)
+ return;
+
+ if (level == 1)
+ sibling++;
+
+ hlist_for_each_entry(child, &c->children, child_node)
+ clk_show_subtree(child, level + 1);
+}
+
+unsigned int clk_get_children(char *name)
+{
+ struct clk_core *core;
+ struct clk *pclk = __clk_lookup(name);
+
+ sibling = 0;
+ core = pclk->core;
+ clk_show_subtree(core, 0);
+ return sibling;
+}
+
static struct clk_core *__clk_lookup_subtree(const char *name,
struct clk_core *core)
{
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index f711be6..e94dfb2 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -745,6 +745,7 @@ unsigned int __clk_get_enable_count(struct clk *clk);
unsigned long clk_hw_get_rate(const struct clk_hw *hw);
unsigned long __clk_get_flags(struct clk *clk);
unsigned long clk_hw_get_flags(const struct clk_hw *hw);
+unsigned int clk_get_children(char *name);
bool clk_hw_is_prepared(const struct clk_hw *hw);
bool clk_hw_rate_is_protected(const struct clk_hw *hw);
bool clk_hw_is_enabled(const struct clk_hw *hw);
--
2.7.4
next prev parent reply other threads:[~2018-02-28 22:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-28 22:27 [PATCH 0/3] drivers: clk: Add ZynqMp clock driver support Jolly Shah
2018-02-28 22:27 ` Jolly Shah [this message]
2018-03-19 18:21 ` [PATCH 1/3] drivers: clk: Add clk_get_children support Stephen Boyd
2018-03-20 19:29 ` Jolly Shah
2018-02-28 22:27 ` [PATCH 2/3] dt-bindings: clock: Add bindings for ZynqMP clock driver Jolly Shah
2018-03-06 1:45 ` Rob Herring
2018-03-07 22:47 ` Jolly Shah
2018-03-08 1:20 ` Rob Herring
2018-03-13 18:39 ` Jolly Shah
2018-03-19 18:23 ` Stephen Boyd
2018-03-20 19:15 ` Jolly Shah
2018-02-28 22:27 ` [PATCH 3/3] drivers: clk: Add " Jolly Shah
2018-03-03 3:32 ` kbuild test robot
2018-03-05 10:37 ` Sudeep Holla
2018-03-19 20:09 ` Stephen Boyd
2018-03-21 19:59 ` Jolly Shah
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