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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR02MB3821 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180228_142811_310800_A12C0805 X-CRM114-Status: GOOD ( 14.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Tejas Patel , Shubhrajyoti Datta , linux-kernel@vger.kernel.org, Jolly Shah , rajanv@xilinx.com, Jolly Shah , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jolly Shah This API helps to determine the users for any clock. Signed-off-by: Jolly Shah Signed-off-by: Tejas Patel Signed-off-by: Shubhrajyoti Datta --- 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);