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Subject[PATCH v5 02/44] clk: davinci: New driver for davinci PLL clocks
Date
This adds a new driver for mach-davinci PLL clocks. This is porting the
code from arch/arm/mach-davinci/clock.c to the common clock framework.
Additionally, it adds device tree support for these clocks.

The ifeq ($(CONFIG_COMMON_CLK), y) in the Makefile is needed to prevent
compile errors until the clock code in arch/arm/mach-davinci is removed.

Note: although there are similar clocks for TI Keystone we are not able
to share the code for a few reasons. The keystone clocks are device tree
only and use legacy one-node-per-clock bindings. Also the register
layouts are a bit different, which would add even more if/else mess
to the keystone clocks. And the keystone PLL driver doesn't support
setting clock rates.

Signed-off-by: David Lechner <david@lechnology.com>
---
MAINTAINERS | 6 +
drivers/clk/Makefile | 1 +
drivers/clk/davinci/Makefile | 5 +
drivers/clk/davinci/pll.c | 564 +++++++++++++++++++++++++++++++++++++++++++
drivers/clk/davinci/pll.h | 61 +++++
5 files changed, 637 insertions(+)
create mode 100644 drivers/clk/davinci/Makefile
create mode 100644 drivers/clk/davinci/pll.c
create mode 100644 drivers/clk/davinci/pll.h

diff --git a/MAINTAINERS b/MAINTAINERS
index a6e86e2..1db0cf0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13554,6 +13554,12 @@ F: arch/arm/mach-davinci/
F: drivers/i2c/busses/i2c-davinci.c
F: arch/arm/boot/dts/da850*

+TI DAVINCI SERIES CLOCK DRIVER
+M: David Lechner <david@lechnology.com>
+S: Maintained
+F: Documentation/devicetree/bindings/clock/ti/davinci/
+F: drivers/clk/davinci/
+
TI DAVINCI SERIES GPIO DRIVER
M: Keerthy <j-keerthy@ti.com>
L: linux-gpio@vger.kernel.org
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f7f761b..c865fd0 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_ARCH_ARTPEC) += axis/
obj-$(CONFIG_ARC_PLAT_AXS10X) += axs10x/
obj-y += bcm/
obj-$(CONFIG_ARCH_BERLIN) += berlin/
+obj-$(CONFIG_ARCH_DAVINCI) += davinci/
obj-$(CONFIG_H8300) += h8300/
obj-$(CONFIG_ARCH_HISI) += hisilicon/
obj-y += imgtec/
diff --git a/drivers/clk/davinci/Makefile b/drivers/clk/davinci/Makefile
new file mode 100644
index 0000000..d9673bd
--- /dev/null
+++ b/drivers/clk/davinci/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+ifeq ($(CONFIG_COMMON_CLK), y)
+obj-y += pll.o
+endif
diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c
new file mode 100644
index 0000000..46f9c18
--- /dev/null
+++ b/drivers/clk/davinci/pll.c
@@ -0,0 +1,564 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLL clock driver for TI Davinci SoCs
+ *
+ * Copyright (C) 2017 David Lechner <david@lechnology.com>
+ *
+ * Based on drivers/clk/keystone/pll.c
+ * Copyright (C) 2013 Texas Instruments Inc.
+ * Murali Karicheri <m-karicheri2@ti.com>
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * And on arch/arm/mach-davinci/clock.c
+ * Copyright (C) 2006-2007 Texas Instruments.
+ * Copyright (C) 2008-2009 Deep Root Systems, LLC
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+#include "pll.h"
+
+#define REVID 0x000
+#define PLLCTL 0x100
+#define OCSEL 0x104
+#define PLLSECCTL 0x108
+#define PLLM 0x110
+#define PREDIV 0x114
+#define PLLDIV1 0x118
+#define PLLDIV2 0x11c
+#define PLLDIV3 0x120
+#define OSCDIV 0x124
+#define POSTDIV 0x128
+#define BPDIV 0x12c
+#define PLLCMD 0x138
+#define PLLSTAT 0x13c
+#define ALNCTL 0x140
+#define DCHANGE 0x144
+#define CKEN 0x148
+#define CKSTAT 0x14c
+#define SYSTAT 0x150
+#define PLLDIV4 0x160
+#define PLLDIV5 0x164
+#define PLLDIV6 0x168
+#define PLLDIV7 0x16c
+#define PLLDIV8 0x170
+#define PLLDIV9 0x174
+
+#define PLLCTL_PLLEN BIT(0)
+#define PLLCTL_PLLPWRDN BIT(1)
+#define PLLCTL_PLLRST BIT(3)
+#define PLLCTL_PLLDIS BIT(4)
+#define PLLCTL_PLLENSRC BIT(5)
+#define PLLCTL_CLKMODE BIT(8)
+
+#define PLLM_MASK 0x1f
+#define PREDIV_RATIO_MASK 0x1f
+#define PREDIV_PREDEN BIT(15)
+#define PLLDIV_RATIO_WIDTH 5
+#define PLLDIV_ENABLE_SHIFT 15
+#define OSCDIV_RATIO_WIDTH 5
+#define POSTDIV_RATIO_MASK 0x1f
+#define POSTDIV_POSTDEN BIT(15)
+#define BPDIV_RATIO_SHIFT 0
+#define BPDIV_RATIO_WIDTH 5
+#define CKEN_OBSCLK_SHIFT 1
+#define CKEN_AUXEN_SHIFT 0
+
+/*
+ * OMAP-L138 system reference guide recommends a wait for 4 OSCIN/CLKIN
+ * cycles to ensure that the PLLC has switched to bypass mode. Delay of 1us
+ * ensures we are good for all > 4MHz OSCIN/CLKIN inputs. Typically the input
+ * is ~25MHz. Units are micro seconds.
+ */
+#define PLL_BYPASS_TIME 1
+/* From OMAP-L138 datasheet table 6-4. Units are micro seconds */
+#define PLL_RESET_TIME 1
+/*
+ * From OMAP-L138 datasheet table 6-4; assuming prediv = 1, sqrt(pllm) = 4
+ * Units are micro seconds.
+ */
+#define PLL_LOCK_TIME 20
+
+/**
+ * struct davinci_pll_clk - Main PLL clock
+ * @hw: clk_hw for the pll
+ * @base: Base memory address
+ * @parent_rate: Saved parent rate used by some child clocks
+ */
+struct davinci_pll_clk {
+ struct clk_hw hw;
+ void __iomem *base;
+};
+
+#define to_davinci_pll_clk(_hw) container_of((_hw), struct davinci_pll_clk, hw)
+
+static unsigned long davinci_pll_clk_recalc(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct davinci_pll_clk *pll = to_davinci_pll_clk(hw);
+ unsigned long rate = parent_rate;
+ u32 prediv, mult, postdiv;
+
+ prediv = readl(pll->base + PREDIV) & PREDIV_RATIO_MASK;
+ mult = readl(pll->base + PLLM) & PLLM_MASK;
+ postdiv = readl(pll->base + POSTDIV) & POSTDIV_RATIO_MASK;
+
+ rate /= prediv + 1;
+ rate *= mult + 1;
+ rate /= postdiv + 1;
+
+ return rate;
+}
+
+/**
+ * davinci_pll_get_best_rate - Calculate PLL output closest to a given rate
+ * @rate: The target rate
+ * @parent_rate: The PLL input clock rate
+ * @mult: Pointer to hold the multiplier value (optional)
+ * @postdiv: Pointer to hold the postdiv value (optional)
+ *
+ * Returns: The closest rate less than or equal to @rate that the PLL can
+ * generate. @mult and @postdiv will contain the values required to generate
+ * that rate.
+ */
+static long davinci_pll_get_best_rate(u32 rate, u32 parent_rate, u32 *mult,
+ u32 *postdiv)
+{
+ u32 r, m, d;
+ u32 best_rate = 0;
+ u32 best_mult = 0;
+ u32 best_postdiv = 0;
+
+ for (d = 1; d <= 4; d++) {
+ for (m = min(32U, rate * d / parent_rate); m > 0; m--) {
+ r = parent_rate * m / d;
+
+ if (r < best_rate)
+ break;
+
+ if (r > best_rate && r <= rate) {
+ best_rate = r;
+ best_mult = m;
+ best_postdiv = d;
+ }
+
+ if (best_rate == rate)
+ goto out;
+ }
+ }
+
+out:
+ if (mult)
+ *mult = best_mult;
+ if (postdiv)
+ *postdiv = best_postdiv;
+
+ return best_rate;
+}
+
+static long davinci_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return davinci_pll_get_best_rate(rate, *parent_rate, NULL, NULL);
+}
+
+/**
+ * __davinci_pll_set_rate - set the output rate of a given PLL.
+ *
+ * Note: Currently tested to work with OMAP-L138 only.
+ *
+ * @pll: pll whose rate needs to be changed.
+ * @prediv: The pre divider value. Passing 0 disables the pre-divider.
+ * @pllm: The multiplier value. Passing 0 leads to multiply-by-one.
+ * @postdiv: The post divider value. Passing 0 disables the post-divider.
+ */
+static void __davinci_pll_set_rate(struct davinci_pll_clk *pll, u32 prediv,
+ u32 mult, u32 postdiv)
+{
+ u32 ctrl, locktime;
+
+ /*
+ * PLL lock time required per OMAP-L138 datasheet is
+ * (2000 * prediv)/sqrt(pllm) OSCIN cycles. We approximate sqrt(pllm)
+ * as 4 and OSCIN cycle as 25 MHz.
+ */
+ if (prediv) {
+ locktime = ((2000 * prediv) / 100);
+ prediv = (prediv - 1) | PREDIV_PREDEN;
+ } else {
+ locktime = PLL_LOCK_TIME;
+ }
+ if (postdiv)
+ postdiv = (postdiv - 1) | POSTDIV_POSTDEN;
+ if (mult)
+ mult = mult - 1;
+
+ ctrl = readl(pll->base + PLLCTL);
+
+ /* Switch the PLL to bypass mode */
+ ctrl &= ~(PLLCTL_PLLENSRC | PLLCTL_PLLEN);
+ writel(ctrl, pll->base + PLLCTL);
+
+ udelay(PLL_BYPASS_TIME);
+
+ /* Reset and enable PLL */
+ ctrl &= ~(PLLCTL_PLLRST | PLLCTL_PLLDIS);
+ writel(ctrl, pll->base + PLLCTL);
+
+ writel(prediv, pll->base + PREDIV);
+ writel(mult, pll->base + PLLM);
+ writel(postdiv, pll->base + POSTDIV);
+
+ udelay(PLL_RESET_TIME);
+
+ /* Bring PLL out of reset */
+ ctrl |= PLLCTL_PLLRST;
+ writel(ctrl, pll->base + PLLCTL);
+
+ udelay(locktime);
+
+ /* Remove PLL from bypass mode */
+ ctrl |= PLLCTL_PLLEN;
+ writel(ctrl, pll->base + PLLCTL);
+}
+
+static int davinci_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct davinci_pll_clk *pll = to_davinci_pll_clk(hw);
+ u32 mult, postdiv;
+
+ davinci_pll_get_best_rate(rate, parent_rate, &mult, &postdiv);
+ __davinci_pll_set_rate(pll, 1, mult, postdiv);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+
+#define DEBUG_REG(n) \
+{ \
+ .name = #n, \
+ .offset = n, \
+}
+
+static const struct debugfs_reg32 davinci_pll_regs[] = {
+ DEBUG_REG(REVID),
+ DEBUG_REG(PLLCTL),
+ DEBUG_REG(OCSEL),
+ DEBUG_REG(PLLSECCTL),
+ DEBUG_REG(PLLM),
+ DEBUG_REG(PREDIV),
+ DEBUG_REG(PLLDIV1),
+ DEBUG_REG(PLLDIV2),
+ DEBUG_REG(PLLDIV3),
+ DEBUG_REG(OSCDIV),
+ DEBUG_REG(POSTDIV),
+ DEBUG_REG(BPDIV),
+ DEBUG_REG(PLLCMD),
+ DEBUG_REG(PLLSTAT),
+ DEBUG_REG(ALNCTL),
+ DEBUG_REG(DCHANGE),
+ DEBUG_REG(CKEN),
+ DEBUG_REG(CKSTAT),
+ DEBUG_REG(SYSTAT),
+ DEBUG_REG(PLLDIV4),
+ DEBUG_REG(PLLDIV5),
+ DEBUG_REG(PLLDIV6),
+ DEBUG_REG(PLLDIV7),
+ DEBUG_REG(PLLDIV8),
+ DEBUG_REG(PLLDIV9),
+};
+
+static int davinci_pll_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct davinci_pll_clk *pll = to_davinci_pll_clk(hw);
+ struct debugfs_regset32 *regset;
+ struct dentry *d;
+
+ regset = kzalloc(sizeof(regset), GFP_KERNEL);
+ if (!regset)
+ return -ENOMEM;
+
+ regset->regs = davinci_pll_regs;
+ regset->nregs = ARRAY_SIZE(davinci_pll_regs);
+ regset->base = pll->base;
+
+ d = debugfs_create_regset32("registers", 0400, dentry, regset);
+ if (IS_ERR(d)) {
+ kfree(regset);
+ return PTR_ERR(d);
+ }
+
+ return 0;
+}
+#else
+#define davinci_pll_debug_init NULL
+#endif
+
+static const struct clk_ops davinci_pll_clk_ops = {
+ .recalc_rate = davinci_pll_clk_recalc,
+ .round_rate = davinci_pll_round_rate,
+ .set_rate = davinci_pll_set_rate,
+ .debug_init = davinci_pll_debug_init,
+};
+
+/**
+ * davinci_pll_clk_register - Register a PLL clock
+ * @name: The clock name
+ * @parent_name: The parent clock name
+ * @base: The PLL's memory region
+ */
+struct clk *davinci_pll_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base)
+{
+ struct clk_init_data init;
+ struct davinci_pll_clk *pll;
+ struct clk *clk;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &davinci_pll_clk_ops;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ init.flags = 0;
+
+ pll->base = base;
+ pll->hw.init = &init;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (IS_ERR(clk))
+ kfree(pll);
+
+ return clk;
+}
+
+struct davinci_pll_aux_clk {
+ struct clk_hw hw;
+ struct davinci_pll_clk *pll;
+};
+
+/**
+ * davinci_pll_aux_clk_register - Register bypass clock (AUXCLK)
+ * @name: The clock name
+ * @parent_name: The parent clock name (usually "ref_clk" since this bypasses
+ * the PLL)
+ * @base: The PLL memory region
+ */
+struct clk *davinci_pll_aux_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base)
+{
+ return clk_register_gate(NULL, name, parent_name, 0, base + CKEN,
+ CKEN_AUXEN_SHIFT, 0, NULL);
+}
+
+/**
+ * davinci_pll_bpdiv_clk_register - Register bypass divider clock (SYSCLKBP)
+ * @name: The clock name
+ * @parent_name: The parent clock name (usually "ref_clk" since this bypasses
+ * the PLL)
+ * @base: The PLL memory region
+ */
+struct clk *davinci_pll_bpdiv_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base)
+{
+ return clk_register_divider(NULL, name, parent_name, 0, base + BPDIV,
+ BPDIV_RATIO_SHIFT, BPDIV_RATIO_WIDTH,
+ CLK_DIVIDER_READ_ONLY, NULL);
+}
+
+/**
+ * davinci_pll_obs_clk_register - Register oscillator divider clock (OBSCLK)
+ * @name: The clock name
+ * @parent_names: The parent clock names
+ * @num_parents: The number of paren clocks
+ * @base: The PLL memory region
+ * @table: A table of values cooresponding to the parent clocks (see OCSEL
+ * register in SRM for values)
+ */
+struct clk *davinci_pll_obs_clk_register(const char *name,
+ const char * const *parent_names,
+ u8 num_parents,
+ void __iomem *base,
+ u32 *table)
+{
+ struct clk_mux *mux;
+ struct clk_gate *gate;
+ struct clk_divider *divider;
+ struct clk *clk;
+
+ mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+ if (!mux)
+ return ERR_PTR(-ENOMEM);
+
+ mux->reg = base + OCSEL;
+ mux->table = table;
+
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate) {
+ kfree(mux);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ gate->reg = base + CKEN;
+ gate->bit_idx = CKEN_OBSCLK_SHIFT;
+
+ divider = kzalloc(sizeof(*divider), GFP_KERNEL);
+ if (!divider) {
+ kfree(gate);
+ kfree(mux);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ divider->reg = base + OSCDIV;
+ divider->width = OSCDIV_RATIO_WIDTH;
+
+ clk = clk_register_composite(NULL, name, parent_names, num_parents,
+ &mux->hw, &clk_mux_ops,
+ &divider->hw, &clk_divider_ops,
+ &gate->hw, &clk_gate_ops, 0);
+ if (IS_ERR(clk)) {
+ kfree(divider);
+ kfree(gate);
+ kfree(mux);
+ }
+
+ return clk;
+}
+
+struct clk *
+davinci_pll_divclk_register(const struct davinci_pll_divclk_info *info,
+ void __iomem *base)
+{
+ const struct clk_ops *divider_ops = &clk_divider_ops;
+ struct clk_gate *gate;
+ struct clk_divider *divider;
+ struct clk *clk;
+ u32 reg;
+ u32 flags = 0;
+
+ /* PLLDIVn registers are not entirely consecutive */
+ if (info->id < 4)
+ reg = PLLDIV1 + 4 * (info->id - 1);
+ else
+ reg = PLLDIV4 + 4 * (info->id - 4);
+
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate)
+ return ERR_PTR(-ENOMEM);
+
+ gate->reg = base + reg;
+ gate->bit_idx = PLLDIV_ENABLE_SHIFT;
+
+ divider = kzalloc(sizeof(*divider), GFP_KERNEL);
+ if (!divider) {
+ kfree(gate);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ divider->reg = base + reg;
+ divider->width = PLLDIV_RATIO_WIDTH;
+ divider->flags = 0;
+
+ if (info->flags & DIVCLK_FIXED_DIV) {
+ flags |= CLK_DIVIDER_READ_ONLY;
+ divider_ops = &clk_divider_ro_ops;
+ }
+
+ /* Only the ARM clock can change the parent PLL rate */
+ if (info->flags & DIVCLK_ARM_RATE)
+ flags |= CLK_SET_RATE_PARENT;
+
+ if (info->flags & DIVCLK_ALWAYS_ENABLED)
+ flags |= CLK_IS_CRITICAL;
+
+ clk = clk_register_composite(NULL, info->name, &info->parent_name, 1,
+ NULL, NULL, &divider->hw, divider_ops,
+ &gate->hw, &clk_gate_ops, flags);
+ if (IS_ERR(clk)) {
+ kfree(divider);
+ kfree(gate);
+ }
+
+ return clk;
+}
+
+#ifdef CONFIG_OF
+#define MAX_NAME_SIZE 20
+
+void of_davinci_pll_init(struct device_node *node, const char *name,
+ const struct davinci_pll_divclk_info *info,
+ u8 max_divclk_id)
+{
+ struct device_node *child;
+ const char *parent_name;
+ void __iomem *base;
+ struct clk *clk;
+
+ base = of_iomap(node, 0);
+ if (!base) {
+ pr_err("%s: ioremap failed\n", __func__);
+ return;
+ }
+
+ parent_name = of_clk_get_parent_name(node, 0);
+
+ clk = davinci_pll_clk_register(name, parent_name, base);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register %s (%ld)\n", __func__, name,
+ PTR_ERR(clk));
+ return;
+ }
+
+ child = of_get_child_by_name(node, "sysclk");
+ if (child && of_device_is_available(child)) {
+ struct clk_onecell_data *clk_data;
+
+ clk_data = clk_alloc_onecell_data(max_divclk_id + 1);
+ if (!clk_data) {
+ pr_err("%s: out of memory\n", __func__);
+ return;
+ }
+
+ for (; info->name; info++) {
+ clk = davinci_pll_divclk_register(info, base);
+ if (IS_ERR(clk))
+ pr_warn("%s: failed to register %s (%ld)\n",
+ __func__, info->name, PTR_ERR(clk));
+ else
+ clk_data->clks[info->id] = clk;
+ }
+ of_clk_add_provider(child, of_clk_src_onecell_get, clk_data);
+ }
+ of_node_put(child);
+
+ child = of_get_child_by_name(node, "auxclk");
+ if (child && of_device_is_available(child)) {
+ char child_name[MAX_NAME_SIZE];
+
+ snprintf(child_name, MAX_NAME_SIZE, "%s_aux_clk", name);
+
+ clk = davinci_pll_aux_clk_register(child_name, parent_name, base);
+ if (IS_ERR(clk))
+ pr_warn("%s: failed to register %s (%ld)\n", __func__,
+ child_name, PTR_ERR(clk));
+ else
+ of_clk_add_provider(child, of_clk_src_simple_get, clk);
+ }
+ of_node_put(child);
+}
+#endif
diff --git a/drivers/clk/davinci/pll.h b/drivers/clk/davinci/pll.h
new file mode 100644
index 0000000..259678b
--- /dev/null
+++ b/drivers/clk/davinci/pll.h
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Clock driver for TI Davinci PSC controllers
+ *
+ * Copyright (C) 2017 David Lechner <david@lechnology.com>
+ */
+
+#ifndef __CLK_DAVINCI_PLL_H___
+#define __CLK_DAVINCI_PLL_H___
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+#define DIVCLK_ARM_RATE BIT(0) /* Controls ARM rate */
+#define DIVCLK_FIXED_DIV BIT(1) /* Fixed divider */
+#define DIVCLK_ALWAYS_ENABLED BIT(2) /* Or bad things happen */
+
+struct davinci_pll_divclk_info {
+ const char *name;
+ const char *parent_name;
+ u32 id;
+ u32 flags;
+};
+
+#define DIVCLK(i, n, p, f) \
+{ \
+ .name = #n, \
+ .parent_name = #p, \
+ .id = (i), \
+ .flags = (f), \
+}
+
+struct clk;
+
+struct clk *davinci_pll_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base);
+struct clk *davinci_pll_aux_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base);
+struct clk *davinci_pll_bpdiv_clk_register(const char *name,
+ const char *parent_name,
+ void __iomem *base);
+struct clk *davinci_pll_obs_clk_register(const char *name,
+ const char * const *parent_names,
+ u8 num_parents,
+ void __iomem *base,
+ u32 *table);
+struct clk *
+davinci_pll_divclk_register(const struct davinci_pll_divclk_info *info,
+ void __iomem *base);
+
+#ifdef CONFIG_OF
+struct device_node;
+
+void of_davinci_pll_init(struct device_node *node, const char *name,
+ const struct davinci_pll_divclk_info *info,
+ u8 max_divclk_id);
+#endif
+
+#endif /* __CLK_DAVINCI_PLL_H___ */
--
2.7.4
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