Message ID | 1515449797-5629-2-git-send-email-jollys@xilinx.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Mon, 08 Jan 2018 14:16:44 -0800 Received: from [172.19.2.91] (helo=xsjjollys50.xilinx.com) by xsj-pvapsmtp01 with esmtp (Exim 4.63) (envelope-from <jollys@xilinx.com>) id 1eYfii-0005dh-Lt; Mon, 08 Jan 2018 14:16:40 -0800 From: Jolly Shah <jolly.shah@xilinx.com> To: <mturquette@baylibre.com>, <sboyd@codeaurora.org>, <michal.simek@xilinx.com>, <linux-clk@vger.kernel.org> Subject: [RFC PATCH 1/2] drivers: clk: Add clk_get_children support Date: Mon, 8 Jan 2018 14:16:36 -0800 Message-ID: <1515449797-5629-2-git-send-email-jollys@xilinx.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1515449797-5629-1-git-send-email-jollys@xilinx.com> References: <1515449797-5629-1-git-send-email-jollys@xilinx.com> X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23582.004 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:149.199.60.100; IPV:NLI; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(346002)(376002)(396003)(39380400002)(39860400002)(2980300002)(438002)(189003)(199004)(9786002)(48376002)(2950100002)(5660300001)(50466002)(47776003)(8936002)(50226002)(305945005)(81156014)(2906002)(8676002)(81166006)(4326008)(107886003)(6666003)(106466001)(77096006)(72206003)(356003)(36386004)(478600001)(36756003)(54906003)(110136005)(76176011)(63266004)(106002)(51416003)(316002)(16586007)(2201001)(7696005)(107986001)(5001870100001)(217873001); 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diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index b56c11f..7488787 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -258,6 +258,34 @@ 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 7c925e6..8191a32a 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -743,6 +743,7 @@ 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_is_enabled(const struct clk_hw *hw); bool __clk_is_enabled(struct clk *clk);