799d0dddf6
The QorIQ LS2088A processor is built on the Layerscape architecture combining eight ARM A72 processor cores with advanced, high-performance datapath acceleration and network, peripheral interfaces required for networking, telecom, wireless infrastructure, aerospace applications and general-purpose embedded applications. Features summary: - Eight 64-bit ARM v8 Cortex-A72 CPUs - Two 64-bit DDR4 SDRAM memory controller with ECC - One 32-bit DDR3 SDRAM memory controller with ECC - Data path acceleration architecture 2.0 (DPAA2) - Ethernet interfaces - IFC, 4 PCIe, 2 SATA, 2 USB, 1 SDXC, 2 DUARTs etc Signed-off-by: Yutang Jiang <yutang.jiang@nxp.com>
84 lines
2.6 KiB
Diff
84 lines
2.6 KiB
Diff
From df2373ca941741f3f66750241a048ad4e2ff2c91 Mon Sep 17 00:00:00 2001
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From: Zhao Qiang <qiang.zhao@nxp.com>
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Date: Thu, 24 Nov 2016 11:47:45 +0800
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Subject: [PATCH 236/238] clk: add API of clks
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Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
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---
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drivers/clk/clk.c | 19 +++++++++++++++++++
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include/linux/clk-provider.h | 1 +
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include/linux/clk.h | 9 +++++++++
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3 files changed, 29 insertions(+)
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diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
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index f13c3f4..0f6bcf5 100644
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--- a/drivers/clk/clk.c
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+++ b/drivers/clk/clk.c
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@@ -359,6 +359,19 @@ static struct clk_core *clk_core_get_parent_by_index(struct clk_core *core,
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return core->parents[index];
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}
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+struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
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+{
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+ struct clk_core *parent;
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+
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+ if (!clk)
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+ return NULL;
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+
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+ parent = clk_core_get_parent_by_index(clk->core, index);
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+
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+ return !parent ? NULL : parent->hw->clk;
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+}
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+EXPORT_SYMBOL_GPL(clk_get_parent_by_index);
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+
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struct clk_hw *
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clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index)
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{
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@@ -2033,6 +2046,12 @@ static const struct file_operations clk_summary_fops = {
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.release = single_release,
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};
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+unsigned int clk_get_num_parents(struct clk *clk)
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+{
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+ return !clk ? 0 : clk->core->num_parents;
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+}
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+EXPORT_SYMBOL_GPL(clk_get_num_parents);
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+
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static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
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{
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if (!c)
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diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
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index 7cd0171..77dfd61 100644
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--- a/include/linux/clk-provider.h
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+++ b/include/linux/clk-provider.h
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@@ -650,6 +650,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
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struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
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struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
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unsigned int index);
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+struct clk *clk_get_parent_by_index(struct clk *clk, u8 index);
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unsigned int __clk_get_enable_count(struct clk *clk);
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unsigned long clk_hw_get_rate(const struct clk_hw *hw);
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unsigned long __clk_get_flags(struct clk *clk);
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diff --git a/include/linux/clk.h b/include/linux/clk.h
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index 0df4a51..1df90e3 100644
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--- a/include/linux/clk.h
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+++ b/include/linux/clk.h
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@@ -392,6 +392,15 @@ int clk_set_parent(struct clk *clk, struct clk *parent);
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struct clk *clk_get_parent(struct clk *clk);
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/**
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+ * clk_get_num_parents - get number of possible parents
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+ * @clk: clock source
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+ *
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+ * Returns the number of possible parents of this clock,
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+ * which can then be enumerated using clk_get_parent_by_index().
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+ */
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+unsigned int clk_get_num_parents(struct clk *clk);
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+
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+/**
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* clk_get_sys - get a clock based upon the device name
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* @dev_id: device name
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* @con_id: connection ID
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--
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1.7.9.5
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