Merge tag 'tegra-for-3.7-common-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc

From Stephen Warren:

ARM: tegra: switch to the common clock framework

This branch contains a few bug-fixes, followed by a conversion of Tegra's
clock driver to the common clock framework, followed by various bug fixes
found after the conversion.

* tag 'tegra-for-3.7-common-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ARM: Tegra: Add smp_twd clock for Tegra20
  ARM: tegra: cpu-tegra: explicitly manage re-parenting
  ARM: tegra: fix overflow in tegra20_pll_clk_round_rate()
  ARM: tegra: Fix data type for io address
  ARM: tegra: remove tegra_timer from tegra_list_clks
  ARM: tegra30: clocks: fix the wrong tegra_audio_sync_clk_ops name
  ARM: tegra: clocks: separate tegra_clk_32k_ops from Tegra20 and Tegra30
  ARM: tegra: Remove duplicate code
  ARM: tegra: Port tegra to generic clock framework
  ARM: tegra: Add clk_tegra structure and helper functions
  ARM: tegra: Rename tegra20 clock file
  ARM: tegra20: Separate out clk ops and clk data
  ARM: tegra30: Separate out clk ops and clk data
  ARM: tegra: fix U16 divider range check
  ARM: tegra: turn on UART A clock at boot

1 files changed, 1555 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/tegra20_clocks.c b/arch/arm/mach-tegra/tegra20_clocks.c
new file mode 100644
index 000000000000..840ab262272a
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra20_clocks.c
@@ -0,0 +1,1555 @@
+/*
+ * arch/arm/mach-tegra/tegra20_clocks.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2010-2012 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+
+#include <mach/iomap.h>
+#include <mach/suspend.h>
+
+#include "clock.h"
+#include "fuse.h"
+#include "tegra2_emc.h"
+
+#define RST_DEVICES			0x004
+#define RST_DEVICES_SET			0x300
+#define RST_DEVICES_CLR			0x304
+#define RST_DEVICES_NUM			3
+
+#define CLK_OUT_ENB			0x010
+#define CLK_OUT_ENB_SET			0x320
+#define CLK_OUT_ENB_CLR			0x324
+#define CLK_OUT_ENB_NUM			3
+
+#define CLK_MASK_ARM			0x44
+#define MISC_CLK_ENB			0x48
+
+#define OSC_CTRL			0x50
+#define OSC_CTRL_OSC_FREQ_MASK		(3<<30)
+#define OSC_CTRL_OSC_FREQ_13MHZ		(0<<30)
+#define OSC_CTRL_OSC_FREQ_19_2MHZ	(1<<30)
+#define OSC_CTRL_OSC_FREQ_12MHZ		(2<<30)
+#define OSC_CTRL_OSC_FREQ_26MHZ		(3<<30)
+#define OSC_CTRL_MASK			(0x3f2 | OSC_CTRL_OSC_FREQ_MASK)
+
+#define OSC_FREQ_DET			0x58
+#define OSC_FREQ_DET_TRIG		(1<<31)
+
+#define OSC_FREQ_DET_STATUS		0x5C
+#define OSC_FREQ_DET_BUSY		(1<<31)
+#define OSC_FREQ_DET_CNT_MASK		0xFFFF
+
+#define PERIPH_CLK_SOURCE_I2S1		0x100
+#define PERIPH_CLK_SOURCE_EMC		0x19c
+#define PERIPH_CLK_SOURCE_OSC		0x1fc
+#define PERIPH_CLK_SOURCE_NUM \
+	((PERIPH_CLK_SOURCE_OSC - PERIPH_CLK_SOURCE_I2S1) / 4)
+
+#define PERIPH_CLK_SOURCE_MASK		(3<<30)
+#define PERIPH_CLK_SOURCE_SHIFT		30
+#define PERIPH_CLK_SOURCE_PWM_MASK	(7<<28)
+#define PERIPH_CLK_SOURCE_PWM_SHIFT	28
+#define PERIPH_CLK_SOURCE_ENABLE	(1<<28)
+#define PERIPH_CLK_SOURCE_DIVU71_MASK	0xFF
+#define PERIPH_CLK_SOURCE_DIVU16_MASK	0xFFFF
+#define PERIPH_CLK_SOURCE_DIV_SHIFT	0
+
+#define SDMMC_CLK_INT_FB_SEL		(1 << 23)
+#define SDMMC_CLK_INT_FB_DLY_SHIFT	16
+#define SDMMC_CLK_INT_FB_DLY_MASK	(0xF << SDMMC_CLK_INT_FB_DLY_SHIFT)
+
+#define PLL_BASE			0x0
+#define PLL_BASE_BYPASS			(1<<31)
+#define PLL_BASE_ENABLE			(1<<30)
+#define PLL_BASE_REF_ENABLE		(1<<29)
+#define PLL_BASE_OVERRIDE		(1<<28)
+#define PLL_BASE_DIVP_MASK		(0x7<<20)
+#define PLL_BASE_DIVP_SHIFT		20
+#define PLL_BASE_DIVN_MASK		(0x3FF<<8)
+#define PLL_BASE_DIVN_SHIFT		8
+#define PLL_BASE_DIVM_MASK		(0x1F)
+#define PLL_BASE_DIVM_SHIFT		0
+
+#define PLL_OUT_RATIO_MASK		(0xFF<<8)
+#define PLL_OUT_RATIO_SHIFT		8
+#define PLL_OUT_OVERRIDE		(1<<2)
+#define PLL_OUT_CLKEN			(1<<1)
+#define PLL_OUT_RESET_DISABLE		(1<<0)
+
+#define PLL_MISC(c) (((c)->flags & PLL_ALT_MISC_REG) ? 0x4 : 0xc)
+
+#define PLL_MISC_DCCON_SHIFT		20
+#define PLL_MISC_CPCON_SHIFT		8
+#define PLL_MISC_CPCON_MASK		(0xF<<PLL_MISC_CPCON_SHIFT)
+#define PLL_MISC_LFCON_SHIFT		4
+#define PLL_MISC_LFCON_MASK		(0xF<<PLL_MISC_LFCON_SHIFT)
+#define PLL_MISC_VCOCON_SHIFT		0
+#define PLL_MISC_VCOCON_MASK		(0xF<<PLL_MISC_VCOCON_SHIFT)
+
+#define PLLU_BASE_POST_DIV		(1<<20)
+
+#define PLLD_MISC_CLKENABLE		(1<<30)
+#define PLLD_MISC_DIV_RST		(1<<23)
+#define PLLD_MISC_DCCON_SHIFT		12
+
+#define PLLE_MISC_READY			(1 << 15)
+
+#define PERIPH_CLK_TO_ENB_REG(c)	((c->u.periph.clk_num / 32) * 4)
+#define PERIPH_CLK_TO_ENB_SET_REG(c)	((c->u.periph.clk_num / 32) * 8)
+#define PERIPH_CLK_TO_ENB_BIT(c)	(1 << (c->u.periph.clk_num % 32))
+
+#define SUPER_CLK_MUX			0x00
+#define SUPER_STATE_SHIFT		28
+#define SUPER_STATE_MASK		(0xF << SUPER_STATE_SHIFT)
+#define SUPER_STATE_STANDBY		(0x0 << SUPER_STATE_SHIFT)
+#define SUPER_STATE_IDLE		(0x1 << SUPER_STATE_SHIFT)
+#define SUPER_STATE_RUN			(0x2 << SUPER_STATE_SHIFT)
+#define SUPER_STATE_IRQ			(0x3 << SUPER_STATE_SHIFT)
+#define SUPER_STATE_FIQ			(0x4 << SUPER_STATE_SHIFT)
+#define SUPER_SOURCE_MASK		0xF
+#define	SUPER_FIQ_SOURCE_SHIFT		12
+#define	SUPER_IRQ_SOURCE_SHIFT		8
+#define	SUPER_RUN_SOURCE_SHIFT		4
+#define	SUPER_IDLE_SOURCE_SHIFT		0
+
+#define SUPER_CLK_DIVIDER		0x04
+
+#define BUS_CLK_DISABLE			(1<<3)
+#define BUS_CLK_DIV_MASK		0x3
+
+#define PMC_CTRL			0x0
+ #define PMC_CTRL_BLINK_ENB		(1 << 7)
+
+#define PMC_DPD_PADS_ORIDE		0x1c
+ #define PMC_DPD_PADS_ORIDE_BLINK_ENB	(1 << 20)
+
+#define PMC_BLINK_TIMER_DATA_ON_SHIFT	0
+#define PMC_BLINK_TIMER_DATA_ON_MASK	0x7fff
+#define PMC_BLINK_TIMER_ENB		(1 << 15)
+#define PMC_BLINK_TIMER_DATA_OFF_SHIFT	16
+#define PMC_BLINK_TIMER_DATA_OFF_MASK	0xffff
+
+static void __iomem *reg_clk_base = IO_ADDRESS(TEGRA_CLK_RESET_BASE);
+static void __iomem *reg_pmc_base = IO_ADDRESS(TEGRA_PMC_BASE);
+
+/*
+ * Some clocks share a register with other clocks.  Any clock op that
+ * non-atomically modifies a register used by another clock must lock
+ * clock_register_lock first.
+ */
+static DEFINE_SPINLOCK(clock_register_lock);
+
+/*
+ * Some peripheral clocks share an enable bit, so refcount the enable bits
+ * in registers CLK_ENABLE_L, CLK_ENABLE_H, and CLK_ENABLE_U
+ */
+static int tegra_periph_clk_enable_refcount[3 * 32];
+
+#define clk_writel(value, reg) \
+	__raw_writel(value, reg_clk_base + (reg))
+#define clk_readl(reg) \
+	__raw_readl(reg_clk_base + (reg))
+#define pmc_writel(value, reg) \
+	__raw_writel(value, reg_pmc_base + (reg))
+#define pmc_readl(reg) \
+	__raw_readl(reg_pmc_base + (reg))
+
+static unsigned long clk_measure_input_freq(void)
+{
+	u32 clock_autodetect;
+	clk_writel(OSC_FREQ_DET_TRIG | 1, OSC_FREQ_DET);
+	do {} while (clk_readl(OSC_FREQ_DET_STATUS) & OSC_FREQ_DET_BUSY);
+	clock_autodetect = clk_readl(OSC_FREQ_DET_STATUS);
+	if (clock_autodetect >= 732 - 3 && clock_autodetect <= 732 + 3) {
+		return 12000000;
+	} else if (clock_autodetect >= 794 - 3 && clock_autodetect <= 794 + 3) {
+		return 13000000;
+	} else if (clock_autodetect >= 1172 - 3 && clock_autodetect <= 1172 + 3) {
+		return 19200000;
+	} else if (clock_autodetect >= 1587 - 3 && clock_autodetect <= 1587 + 3) {
+		return 26000000;
+	} else {
+		pr_err("%s: Unexpected clock autodetect value %d",
+						__func__, clock_autodetect);
+		BUG();
+		return 0;
+	}
+}
+
+static int clk_div71_get_divider(unsigned long parent_rate, unsigned long rate)
+{
+	s64 divider_u71 = parent_rate * 2;
+	divider_u71 += rate - 1;
+	do_div(divider_u71, rate);
+
+	if (divider_u71 - 2 < 0)
+		return 0;
+
+	if (divider_u71 - 2 > 255)
+		return -EINVAL;
+
+	return divider_u71 - 2;
+}
+
+static int clk_div16_get_divider(unsigned long parent_rate, unsigned long rate)
+{
+	s64 divider_u16;
+
+	divider_u16 = parent_rate;
+	divider_u16 += rate - 1;
+	do_div(divider_u16, rate);
+
+	if (divider_u16 - 1 < 0)
+		return 0;
+
+	if (divider_u16 - 1 > 0xFFFF)
+		return -EINVAL;
+
+	return divider_u16 - 1;
+}
+
+static unsigned long tegra_clk_fixed_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	return to_clk_tegra(hw)->fixed_rate;
+}
+
+struct clk_ops tegra_clk_32k_ops = {
+	.recalc_rate = tegra_clk_fixed_recalc_rate,
+};
+
+/* clk_m functions */
+static unsigned long tegra20_clk_m_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	if (!to_clk_tegra(hw)->fixed_rate)
+		to_clk_tegra(hw)->fixed_rate = clk_measure_input_freq();
+	return to_clk_tegra(hw)->fixed_rate;
+}
+
+static void tegra20_clk_m_init(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 osc_ctrl = clk_readl(OSC_CTRL);
+	u32 auto_clock_control = osc_ctrl & ~OSC_CTRL_OSC_FREQ_MASK;
+
+	switch (c->fixed_rate) {
+	case 12000000:
+		auto_clock_control |= OSC_CTRL_OSC_FREQ_12MHZ;
+		break;
+	case 13000000:
+		auto_clock_control |= OSC_CTRL_OSC_FREQ_13MHZ;
+		break;
+	case 19200000:
+		auto_clock_control |= OSC_CTRL_OSC_FREQ_19_2MHZ;
+		break;
+	case 26000000:
+		auto_clock_control |= OSC_CTRL_OSC_FREQ_26MHZ;
+		break;
+	default:
+		BUG();
+	}
+	clk_writel(auto_clock_control, OSC_CTRL);
+}
+
+struct clk_ops tegra_clk_m_ops = {
+	.init = tegra20_clk_m_init,
+	.recalc_rate = tegra20_clk_m_recalc_rate,
+};
+
+/* super clock functions */
+/* "super clocks" on tegra have two-stage muxes and a clock skipping
+ * super divider.  We will ignore the clock skipping divider, since we
+ * can't lower the voltage when using the clock skip, but we can if we
+ * lower the PLL frequency.
+ */
+static int tegra20_super_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+
+	val = clk_readl(c->reg + SUPER_CLK_MUX);
+	BUG_ON(((val & SUPER_STATE_MASK) != SUPER_STATE_RUN) &&
+		((val & SUPER_STATE_MASK) != SUPER_STATE_IDLE));
+	c->state = ON;
+	return c->state;
+}
+
+static int tegra20_super_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	clk_writel(0, c->reg + SUPER_CLK_DIVIDER);
+	return 0;
+}
+
+static void tegra20_super_clk_disable(struct clk_hw *hw)
+{
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	/* oops - don't disable the CPU clock! */
+	BUG();
+}
+
+static u8 tegra20_super_clk_get_parent(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	int val = clk_readl(c->reg + SUPER_CLK_MUX);
+	int source;
+	int shift;
+
+	BUG_ON(((val & SUPER_STATE_MASK) != SUPER_STATE_RUN) &&
+		((val & SUPER_STATE_MASK) != SUPER_STATE_IDLE));
+	shift = ((val & SUPER_STATE_MASK) == SUPER_STATE_IDLE) ?
+		SUPER_IDLE_SOURCE_SHIFT : SUPER_RUN_SOURCE_SHIFT;
+	source = (val >> shift) & SUPER_SOURCE_MASK;
+	return source;
+}
+
+static int tegra20_super_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg + SUPER_CLK_MUX);
+	int shift;
+
+	BUG_ON(((val & SUPER_STATE_MASK) != SUPER_STATE_RUN) &&
+		((val & SUPER_STATE_MASK) != SUPER_STATE_IDLE));
+	shift = ((val & SUPER_STATE_MASK) == SUPER_STATE_IDLE) ?
+		SUPER_IDLE_SOURCE_SHIFT : SUPER_RUN_SOURCE_SHIFT;
+	val &= ~(SUPER_SOURCE_MASK << shift);
+	val |= index << shift;
+
+	clk_writel(val, c->reg);
+
+	return 0;
+}
+
+/* FIX ME: Need to switch parents to change the source PLL rate */
+static unsigned long tegra20_super_clk_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	return prate;
+}
+
+static long tegra20_super_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	return *prate;
+}
+
+static int tegra20_super_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	return 0;
+}
+
+struct clk_ops tegra_super_ops = {
+	.is_enabled = tegra20_super_clk_is_enabled,
+	.enable = tegra20_super_clk_enable,
+	.disable = tegra20_super_clk_disable,
+	.set_parent = tegra20_super_clk_set_parent,
+	.get_parent = tegra20_super_clk_get_parent,
+	.set_rate = tegra20_super_clk_set_rate,
+	.round_rate = tegra20_super_clk_round_rate,
+	.recalc_rate = tegra20_super_clk_recalc_rate,
+};
+
+static unsigned long tegra20_twd_clk_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u64 rate = parent_rate;
+
+	if (c->mul != 0 && c->div != 0) {
+		rate *= c->mul;
+		rate += c->div - 1; /* round up */
+		do_div(rate, c->div);
+	}
+
+	return rate;
+}
+
+struct clk_ops tegra_twd_ops = {
+	.recalc_rate = tegra20_twd_clk_recalc_rate,
+};
+
+static u8 tegra20_cop_clk_get_parent(struct clk_hw *hw)
+{
+	return 0;
+}
+
+struct clk_ops tegra_cop_ops = {
+	.get_parent = tegra20_cop_clk_get_parent,
+};
+
+/* virtual cop clock functions. Used to acquire the fake 'cop' clock to
+ * reset the COP block (i.e. AVP) */
+void tegra2_cop_clk_reset(struct clk_hw *hw, bool assert)
+{
+	unsigned long reg = assert ? RST_DEVICES_SET : RST_DEVICES_CLR;
+
+	pr_debug("%s %s\n", __func__, assert ? "assert" : "deassert");
+	clk_writel(1 << 1, reg);
+}
+
+/* bus clock functions */
+static int tegra20_bus_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+
+	c->state = ((val >> c->reg_shift) & BUS_CLK_DISABLE) ? OFF : ON;
+	return c->state;
+}
+
+static int tegra20_bus_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&clock_register_lock, flags);
+
+	val = clk_readl(c->reg);
+	val &= ~(BUS_CLK_DISABLE << c->reg_shift);
+	clk_writel(val, c->reg);
+
+	spin_unlock_irqrestore(&clock_register_lock, flags);
+
+	return 0;
+}
+
+static void tegra20_bus_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&clock_register_lock, flags);
+
+	val = clk_readl(c->reg);
+	val |= BUS_CLK_DISABLE << c->reg_shift;
+	clk_writel(val, c->reg);
+
+	spin_unlock_irqrestore(&clock_register_lock, flags);
+}
+
+static unsigned long tegra20_bus_clk_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+	u64 rate = prate;
+
+	c->div = ((val >> c->reg_shift) & BUS_CLK_DIV_MASK) + 1;
+	c->mul = 1;
+
+	if (c->mul != 0 && c->div != 0) {
+		rate *= c->mul;
+		rate += c->div - 1; /* round up */
+		do_div(rate, c->div);
+	}
+	return rate;
+}
+
+static int tegra20_bus_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	int ret = -EINVAL;
+	unsigned long flags;
+	u32 val;
+	int i;
+
+	spin_lock_irqsave(&clock_register_lock, flags);
+
+	val = clk_readl(c->reg);
+	for (i = 1; i <= 4; i++) {
+		if (rate == parent_rate / i) {
+			val &= ~(BUS_CLK_DIV_MASK << c->reg_shift);
+			val |= (i - 1) << c->reg_shift;
+			clk_writel(val, c->reg);
+			c->div = i;
+			c->mul = 1;
+			ret = 0;
+			break;
+		}
+	}
+
+	spin_unlock_irqrestore(&clock_register_lock, flags);
+
+	return ret;
+}
+
+static long tegra20_bus_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	unsigned long parent_rate = *prate;
+	s64 divider;
+
+	if (rate >= parent_rate)
+		return rate;
+
+	divider = parent_rate;
+	divider += rate - 1;
+	do_div(divider, rate);
+
+	if (divider < 0)
+		return divider;
+
+	if (divider > 4)
+		divider = 4;
+	do_div(parent_rate, divider);
+
+	return parent_rate;
+}
+
+struct clk_ops tegra_bus_ops = {
+	.is_enabled = tegra20_bus_clk_is_enabled,
+	.enable = tegra20_bus_clk_enable,
+	.disable = tegra20_bus_clk_disable,
+	.set_rate = tegra20_bus_clk_set_rate,
+	.round_rate = tegra20_bus_clk_round_rate,
+	.recalc_rate = tegra20_bus_clk_recalc_rate,
+};
+
+/* Blink output functions */
+static int tegra20_blink_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+
+	val = pmc_readl(PMC_CTRL);
+	c->state = (val & PMC_CTRL_BLINK_ENB) ? ON : OFF;
+	return c->state;
+}
+
+static unsigned long tegra20_blink_clk_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u64 rate = prate;
+	u32 val;
+
+	c->mul = 1;
+	val = pmc_readl(c->reg);
+
+	if (val & PMC_BLINK_TIMER_ENB) {
+		unsigned int on_off;
+
+		on_off = (val >> PMC_BLINK_TIMER_DATA_ON_SHIFT) &
+			PMC_BLINK_TIMER_DATA_ON_MASK;
+		val >>= PMC_BLINK_TIMER_DATA_OFF_SHIFT;
+		val &= PMC_BLINK_TIMER_DATA_OFF_MASK;
+		on_off += val;
+		/* each tick in the blink timer is 4 32KHz clocks */
+		c->div = on_off * 4;
+	} else {
+		c->div = 1;
+	}
+
+	if (c->mul != 0 && c->div != 0) {
+		rate *= c->mul;
+		rate += c->div - 1; /* round up */
+		do_div(rate, c->div);
+	}
+	return rate;
+}
+
+static int tegra20_blink_clk_enable(struct clk_hw *hw)
+{
+	u32 val;
+
+	val = pmc_readl(PMC_DPD_PADS_ORIDE);
+	pmc_writel(val | PMC_DPD_PADS_ORIDE_BLINK_ENB, PMC_DPD_PADS_ORIDE);
+
+	val = pmc_readl(PMC_CTRL);
+	pmc_writel(val | PMC_CTRL_BLINK_ENB, PMC_CTRL);
+
+	return 0;
+}
+
+static void tegra20_blink_clk_disable(struct clk_hw *hw)
+{
+	u32 val;
+
+	val = pmc_readl(PMC_CTRL);
+	pmc_writel(val & ~PMC_CTRL_BLINK_ENB, PMC_CTRL);
+
+	val = pmc_readl(PMC_DPD_PADS_ORIDE);
+	pmc_writel(val & ~PMC_DPD_PADS_ORIDE_BLINK_ENB, PMC_DPD_PADS_ORIDE);
+}
+
+static int tegra20_blink_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+
+	if (rate >= parent_rate) {
+		c->div = 1;
+		pmc_writel(0, c->reg);
+	} else {
+		unsigned int on_off;
+		u32 val;
+
+		on_off = DIV_ROUND_UP(parent_rate / 8, rate);
+		c->div = on_off * 8;
+
+		val = (on_off & PMC_BLINK_TIMER_DATA_ON_MASK) <<
+			PMC_BLINK_TIMER_DATA_ON_SHIFT;
+		on_off &= PMC_BLINK_TIMER_DATA_OFF_MASK;
+		on_off <<= PMC_BLINK_TIMER_DATA_OFF_SHIFT;
+		val |= on_off;
+		val |= PMC_BLINK_TIMER_ENB;
+		pmc_writel(val, c->reg);
+	}
+
+	return 0;
+}
+
+static long tegra20_blink_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	int div;
+	int mul;
+	long round_rate = *prate;
+
+	mul = 1;
+
+	if (rate >= *prate) {
+		div = 1;
+	} else {
+		div = DIV_ROUND_UP(*prate / 8, rate);
+		div *= 8;
+	}
+
+	round_rate *= mul;
+	round_rate += div - 1;
+	do_div(round_rate, div);
+
+	return round_rate;
+}
+
+struct clk_ops tegra_blink_clk_ops = {
+	.is_enabled = tegra20_blink_clk_is_enabled,
+	.enable = tegra20_blink_clk_enable,
+	.disable = tegra20_blink_clk_disable,
+	.set_rate = tegra20_blink_clk_set_rate,
+	.round_rate = tegra20_blink_clk_round_rate,
+	.recalc_rate = tegra20_blink_clk_recalc_rate,
+};
+
+/* PLL Functions */
+static int tegra20_pll_clk_wait_for_lock(struct clk_tegra *c)
+{
+	udelay(c->u.pll.lock_delay);
+	return 0;
+}
+
+static int tegra20_pll_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg + PLL_BASE);
+
+	c->state = (val & PLL_BASE_ENABLE) ? ON : OFF;
+	return c->state;
+}
+
+static unsigned long tegra20_pll_clk_recalc_rate(struct clk_hw *hw,
+				unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg + PLL_BASE);
+	u64 rate = prate;
+
+	if (c->flags & PLL_FIXED && !(val & PLL_BASE_OVERRIDE)) {
+		const struct clk_pll_freq_table *sel;
+		for (sel = c->u.pll.freq_table; sel->input_rate != 0; sel++) {
+			if (sel->input_rate == prate &&
+				sel->output_rate == c->u.pll.fixed_rate) {
+				c->mul = sel->n;
+				c->div = sel->m * sel->p;
+				break;
+			}
+		}
+		pr_err("Clock %s has unknown fixed frequency\n",
+			__clk_get_name(hw->clk));
+		BUG();
+	} else if (val & PLL_BASE_BYPASS) {
+		c->mul = 1;
+		c->div = 1;
+	} else {
+		c->mul = (val & PLL_BASE_DIVN_MASK) >> PLL_BASE_DIVN_SHIFT;
+		c->div = (val & PLL_BASE_DIVM_MASK) >> PLL_BASE_DIVM_SHIFT;
+		if (c->flags & PLLU)
+			c->div *= (val & PLLU_BASE_POST_DIV) ? 1 : 2;
+		else
+			c->div *= (val & PLL_BASE_DIVP_MASK) ? 2 : 1;
+	}
+
+	if (c->mul != 0 && c->div != 0) {
+		rate *= c->mul;
+		rate += c->div - 1; /* round up */
+		do_div(rate, c->div);
+	}
+	return rate;
+}
+
+static int tegra20_pll_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	val = clk_readl(c->reg + PLL_BASE);
+	val &= ~PLL_BASE_BYPASS;
+	val |= PLL_BASE_ENABLE;
+	clk_writel(val, c->reg + PLL_BASE);
+
+	tegra20_pll_clk_wait_for_lock(c);
+
+	return 0;
+}
+
+static void tegra20_pll_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	val = clk_readl(c->reg);
+	val &= ~(PLL_BASE_BYPASS | PLL_BASE_ENABLE);
+	clk_writel(val, c->reg);
+}
+
+static int tegra20_pll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long input_rate = parent_rate;
+	const struct clk_pll_freq_table *sel;
+	u32 val;
+
+	pr_debug("%s: %s %lu\n", __func__, __clk_get_name(hw->clk), rate);
+
+	if (c->flags & PLL_FIXED) {
+		int ret = 0;
+		if (rate != c->u.pll.fixed_rate) {
+			pr_err("%s: Can not change %s fixed rate %lu to %lu\n",
+				__func__, __clk_get_name(hw->clk),
+				c->u.pll.fixed_rate, rate);
+			ret = -EINVAL;
+		}
+		return ret;
+	}
+
+	for (sel = c->u.pll.freq_table; sel->input_rate != 0; sel++) {
+		if (sel->input_rate == input_rate && sel->output_rate == rate) {
+			c->mul = sel->n;
+			c->div = sel->m * sel->p;
+
+			val = clk_readl(c->reg + PLL_BASE);
+			if (c->flags & PLL_FIXED)
+				val |= PLL_BASE_OVERRIDE;
+			val &= ~(PLL_BASE_DIVP_MASK | PLL_BASE_DIVN_MASK |
+				 PLL_BASE_DIVM_MASK);
+			val |= (sel->m << PLL_BASE_DIVM_SHIFT) |
+				(sel->n << PLL_BASE_DIVN_SHIFT);
+			BUG_ON(sel->p < 1 || sel->p > 2);
+			if (c->flags & PLLU) {
+				if (sel->p == 1)
+					val |= PLLU_BASE_POST_DIV;
+			} else {
+				if (sel->p == 2)
+					val |= 1 << PLL_BASE_DIVP_SHIFT;
+			}
+			clk_writel(val, c->reg + PLL_BASE);
+
+			if (c->flags & PLL_HAS_CPCON) {
+				val = clk_readl(c->reg + PLL_MISC(c));
+				val &= ~PLL_MISC_CPCON_MASK;
+				val |= sel->cpcon << PLL_MISC_CPCON_SHIFT;
+				clk_writel(val, c->reg + PLL_MISC(c));
+			}
+
+			if (c->state == ON)
+				tegra20_pll_clk_enable(hw);
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+static long tegra20_pll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	const struct clk_pll_freq_table *sel;
+	unsigned long input_rate = *prate;
+	u64 output_rate = *prate;
+	int mul;
+	int div;
+
+	if (c->flags & PLL_FIXED)
+		return c->u.pll.fixed_rate;
+
+	for (sel = c->u.pll.freq_table; sel->input_rate != 0; sel++)
+		if (sel->input_rate == input_rate && sel->output_rate == rate) {
+			mul = sel->n;
+			div = sel->m * sel->p;
+			break;
+		}
+
+	if (sel->input_rate == 0)
+		return -EINVAL;
+
+	output_rate *= mul;
+	output_rate += div - 1; /* round up */
+	do_div(output_rate, div);
+
+	return output_rate;
+}
+
+struct clk_ops tegra_pll_ops = {
+	.is_enabled = tegra20_pll_clk_is_enabled,
+	.enable = tegra20_pll_clk_enable,
+	.disable = tegra20_pll_clk_disable,
+	.set_rate = tegra20_pll_clk_set_rate,
+	.recalc_rate = tegra20_pll_clk_recalc_rate,
+	.round_rate = tegra20_pll_clk_round_rate,
+};
+
+static void tegra20_pllx_clk_init(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+
+	if (tegra_sku_id == 7)
+		c->max_rate = 750000000;
+}
+
+struct clk_ops tegra_pllx_ops = {
+	.init = tegra20_pllx_clk_init,
+	.is_enabled = tegra20_pll_clk_is_enabled,
+	.enable = tegra20_pll_clk_enable,
+	.disable = tegra20_pll_clk_disable,
+	.set_rate = tegra20_pll_clk_set_rate,
+	.recalc_rate = tegra20_pll_clk_recalc_rate,
+	.round_rate = tegra20_pll_clk_round_rate,
+};
+
+static int tegra20_plle_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	mdelay(1);
+
+	val = clk_readl(c->reg + PLL_BASE);
+	if (!(val & PLLE_MISC_READY))
+		return -EBUSY;
+
+	val = clk_readl(c->reg + PLL_BASE);
+	val |= PLL_BASE_ENABLE | PLL_BASE_BYPASS;
+	clk_writel(val, c->reg + PLL_BASE);
+
+	return 0;
+}
+
+struct clk_ops tegra_plle_ops = {
+	.is_enabled = tegra20_pll_clk_is_enabled,
+	.enable = tegra20_plle_clk_enable,
+	.set_rate = tegra20_pll_clk_set_rate,
+	.recalc_rate = tegra20_pll_clk_recalc_rate,
+	.round_rate = tegra20_pll_clk_round_rate,
+};
+
+/* Clock divider ops */
+static int tegra20_pll_div_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+
+	val >>= c->reg_shift;
+	c->state = (val & PLL_OUT_CLKEN) ? ON : OFF;
+	if (!(val & PLL_OUT_RESET_DISABLE))
+		c->state = OFF;
+	return c->state;
+}
+
+static unsigned long tegra20_pll_div_clk_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u64 rate = prate;
+	u32 val = clk_readl(c->reg);
+	u32 divu71;
+
+	val >>= c->reg_shift;
+
+	if (c->flags & DIV_U71) {
+		divu71 = (val & PLL_OUT_RATIO_MASK) >> PLL_OUT_RATIO_SHIFT;
+		c->div = (divu71 + 2);
+		c->mul = 2;
+	} else if (c->flags & DIV_2) {
+		c->div = 2;
+		c->mul = 1;
+	} else {
+		c->div = 1;
+		c->mul = 1;
+	}
+
+	rate *= c->mul;
+	rate += c->div - 1; /* round up */
+	do_div(rate, c->div);
+
+	return rate;
+}
+
+static int tegra20_pll_div_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	u32 new_val;
+	u32 val;
+
+	pr_debug("%s: %s\n", __func__, __clk_get_name(hw->clk));
+
+	if (c->flags & DIV_U71) {
+		spin_lock_irqsave(&clock_register_lock, flags);
+		val = clk_readl(c->reg);
+		new_val = val >> c->reg_shift;
+		new_val &= 0xFFFF;
+
+		new_val |= PLL_OUT_CLKEN | PLL_OUT_RESET_DISABLE;
+
+		val &= ~(0xFFFF << c->reg_shift);
+		val |= new_val << c->reg_shift;
+		clk_writel(val, c->reg);
+		spin_unlock_irqrestore(&clock_register_lock, flags);
+		return 0;
+	} else if (c->flags & DIV_2) {
+		BUG_ON(!(c->flags & PLLD));
+		spin_lock_irqsave(&clock_register_lock, flags);
+		val = clk_readl(c->reg);
+		val &= ~PLLD_MISC_DIV_RST;
+		clk_writel(val, c->reg);
+		spin_unlock_irqrestore(&clock_register_lock, flags);
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static void tegra20_pll_div_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	u32 new_val;
+	u32 val;
+
+	pr_debug("%s: %s\n", __func__, __clk_get_name(hw->clk));
+
+	if (c->flags & DIV_U71) {
+		spin_lock_irqsave(&clock_register_lock, flags);
+		val = clk_readl(c->reg);
+		new_val = val >> c->reg_shift;
+		new_val &= 0xFFFF;
+
+		new_val &= ~(PLL_OUT_CLKEN | PLL_OUT_RESET_DISABLE);
+
+		val &= ~(0xFFFF << c->reg_shift);
+		val |= new_val << c->reg_shift;
+		clk_writel(val, c->reg);
+		spin_unlock_irqrestore(&clock_register_lock, flags);
+	} else if (c->flags & DIV_2) {
+		BUG_ON(!(c->flags & PLLD));
+		spin_lock_irqsave(&clock_register_lock, flags);
+		val = clk_readl(c->reg);
+		val |= PLLD_MISC_DIV_RST;
+		clk_writel(val, c->reg);
+		spin_unlock_irqrestore(&clock_register_lock, flags);
+	}
+}
+
+static int tegra20_pll_div_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	int divider_u71;
+	u32 new_val;
+	u32 val;
+
+	pr_debug("%s: %s %lu\n", __func__, __clk_get_name(hw->clk), rate);
+
+	if (c->flags & DIV_U71) {
+		divider_u71 = clk_div71_get_divider(parent_rate, rate);
+		if (divider_u71 >= 0) {
+			spin_lock_irqsave(&clock_register_lock, flags);
+			val = clk_readl(c->reg);
+			new_val = val >> c->reg_shift;
+			new_val &= 0xFFFF;
+			if (c->flags & DIV_U71_FIXED)
+				new_val |= PLL_OUT_OVERRIDE;
+			new_val &= ~PLL_OUT_RATIO_MASK;
+			new_val |= divider_u71 << PLL_OUT_RATIO_SHIFT;
+
+			val &= ~(0xFFFF << c->reg_shift);
+			val |= new_val << c->reg_shift;
+			clk_writel(val, c->reg);
+			c->div = divider_u71 + 2;
+			c->mul = 2;
+			spin_unlock_irqrestore(&clock_register_lock, flags);
+			return 0;
+		}
+	} else if (c->flags & DIV_2) {
+		if (parent_rate == rate * 2)
+			return 0;
+	}
+	return -EINVAL;
+}
+
+static long tegra20_pll_div_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long parent_rate = *prate;
+	int divider;
+
+	pr_debug("%s: %s %lu\n", __func__, __clk_get_name(hw->clk), rate);
+
+	if (c->flags & DIV_U71) {
+		divider = clk_div71_get_divider(parent_rate, rate);
+		if (divider < 0)
+			return divider;
+		return DIV_ROUND_UP(parent_rate * 2, divider + 2);
+	} else if (c->flags & DIV_2) {
+		return DIV_ROUND_UP(parent_rate, 2);
+	}
+	return -EINVAL;
+}
+
+struct clk_ops tegra_pll_div_ops = {
+	.is_enabled = tegra20_pll_div_clk_is_enabled,
+	.enable = tegra20_pll_div_clk_enable,
+	.disable = tegra20_pll_div_clk_disable,
+	.set_rate = tegra20_pll_div_clk_set_rate,
+	.round_rate = tegra20_pll_div_clk_round_rate,
+	.recalc_rate = tegra20_pll_div_clk_recalc_rate,
+};
+
+/* Periph clk ops */
+
+static int tegra20_periph_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+
+	c->state = ON;
+
+	if (!c->u.periph.clk_num)
+		goto out;
+
+	if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
+			PERIPH_CLK_TO_ENB_BIT(c)))
+		c->state = OFF;
+
+	if (!(c->flags & PERIPH_NO_RESET))
+		if (clk_readl(RST_DEVICES + PERIPH_CLK_TO_ENB_REG(c)) &
+				PERIPH_CLK_TO_ENB_BIT(c))
+			c->state = OFF;
+
+out:
+	return c->state;
+}
+
+static int tegra20_periph_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+	u32 val;
+
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	if (!c->u.periph.clk_num)
+		return 0;
+
+	tegra_periph_clk_enable_refcount[c->u.periph.clk_num]++;
+	if (tegra_periph_clk_enable_refcount[c->u.periph.clk_num] > 1)
+		return 0;
+
+	spin_lock_irqsave(&clock_register_lock, flags);
+
+	clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+		CLK_OUT_ENB_SET + PERIPH_CLK_TO_ENB_SET_REG(c));
+	if (!(c->flags & PERIPH_NO_RESET) && !(c->flags & PERIPH_MANUAL_RESET))
+		clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+			RST_DEVICES_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
+	if (c->flags & PERIPH_EMC_ENB) {
+		/* The EMC peripheral clock has 2 extra enable bits */
+		/* FIXME: Do they need to be disabled? */
+		val = clk_readl(c->reg);
+		val |= 0x3 << 24;
+		clk_writel(val, c->reg);
+	}
+
+	spin_unlock_irqrestore(&clock_register_lock, flags);
+
+	return 0;
+}
+
+static void tegra20_periph_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long flags;
+
+	pr_debug("%s on clock %s\n", __func__, __clk_get_name(hw->clk));
+
+	if (!c->u.periph.clk_num)
+		return;
+
+	tegra_periph_clk_enable_refcount[c->u.periph.clk_num]--;
+
+	if (tegra_periph_clk_enable_refcount[c->u.periph.clk_num] > 0)
+		return;
+
+	spin_lock_irqsave(&clock_register_lock, flags);
+
+	clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+		CLK_OUT_ENB_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
+
+	spin_unlock_irqrestore(&clock_register_lock, flags);
+}
+
+void tegra2_periph_clk_reset(struct clk_hw *hw, bool assert)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long base = assert ? RST_DEVICES_SET : RST_DEVICES_CLR;
+
+	pr_debug("%s %s on clock %s\n", __func__,
+		assert ? "assert" : "deassert", __clk_get_name(hw->clk));
+
+	BUG_ON(!c->u.periph.clk_num);
+
+	if (!(c->flags & PERIPH_NO_RESET))
+		clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+			   base + PERIPH_CLK_TO_ENB_SET_REG(c));
+}
+
+static int tegra20_periph_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+	u32 mask;
+	u32 shift;
+
+	pr_debug("%s: %s %d\n", __func__, __clk_get_name(hw->clk), index);
+
+	if (c->flags & MUX_PWM) {
+		shift = PERIPH_CLK_SOURCE_PWM_SHIFT;
+		mask = PERIPH_CLK_SOURCE_PWM_MASK;
+	} else {
+		shift = PERIPH_CLK_SOURCE_SHIFT;
+		mask = PERIPH_CLK_SOURCE_MASK;
+	}
+
+	val = clk_readl(c->reg);
+	val &= ~mask;
+	val |= (index) << shift;
+
+	clk_writel(val, c->reg);
+
+	return 0;
+}
+
+static u8 tegra20_periph_clk_get_parent(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+	u32 mask;
+	u32 shift;
+
+	if (c->flags & MUX_PWM) {
+		shift = PERIPH_CLK_SOURCE_PWM_SHIFT;
+		mask = PERIPH_CLK_SOURCE_PWM_MASK;
+	} else {
+		shift = PERIPH_CLK_SOURCE_SHIFT;
+		mask = PERIPH_CLK_SOURCE_MASK;
+	}
+
+	if (c->flags & MUX)
+		return (val & mask) >> shift;
+	else
+		return 0;
+}
+
+static unsigned long tegra20_periph_clk_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long rate = prate;
+	u32 val = clk_readl(c->reg);
+
+	if (c->flags & DIV_U71) {
+		u32 divu71 = val & PERIPH_CLK_SOURCE_DIVU71_MASK;
+		c->div = divu71 + 2;
+		c->mul = 2;
+	} else if (c->flags & DIV_U16) {
+		u32 divu16 = val & PERIPH_CLK_SOURCE_DIVU16_MASK;
+		c->div = divu16 + 1;
+		c->mul = 1;
+	} else {
+		c->div = 1;
+		c->mul = 1;
+		return rate;
+	}
+
+	if (c->mul != 0 && c->div != 0) {
+		rate *= c->mul;
+		rate += c->div - 1; /* round up */
+		do_div(rate, c->div);
+	}
+
+	return rate;
+}
+
+static int tegra20_periph_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+	int divider;
+
+	val = clk_readl(c->reg);
+
+	if (c->flags & DIV_U71) {
+		divider = clk_div71_get_divider(parent_rate, rate);
+
+		if (divider >= 0) {
+			val = clk_readl(c->reg);
+			val &= ~PERIPH_CLK_SOURCE_DIVU71_MASK;
+			val |= divider;
+			clk_writel(val, c->reg);
+			c->div = divider + 2;
+			c->mul = 2;
+			return 0;
+		}
+	} else if (c->flags & DIV_U16) {
+		divider = clk_div16_get_divider(parent_rate, rate);
+		if (divider >= 0) {
+			val = clk_readl(c->reg);
+			val &= ~PERIPH_CLK_SOURCE_DIVU16_MASK;
+			val |= divider;
+			clk_writel(val, c->reg);
+			c->div = divider + 1;
+			c->mul = 1;
+			return 0;
+		}
+	} else if (parent_rate <= rate) {
+		c->div = 1;
+		c->mul = 1;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static long tegra20_periph_clk_round_rate(struct clk_hw *hw,
+	unsigned long rate, unsigned long *prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	unsigned long parent_rate = __clk_get_rate(__clk_get_parent(hw->clk));
+	int divider;
+
+	pr_debug("%s: %s %lu\n", __func__, __clk_get_name(hw->clk), rate);
+
+	if (prate)
+		parent_rate = *prate;
+
+	if (c->flags & DIV_U71) {
+		divider = clk_div71_get_divider(parent_rate, rate);
+		if (divider < 0)
+			return divider;
+
+		return DIV_ROUND_UP(parent_rate * 2, divider + 2);
+	} else if (c->flags & DIV_U16) {
+		divider = clk_div16_get_divider(parent_rate, rate);
+		if (divider < 0)
+			return divider;
+		return DIV_ROUND_UP(parent_rate, divider + 1);
+	}
+	return -EINVAL;
+}
+
+struct clk_ops tegra_periph_clk_ops = {
+	.is_enabled = tegra20_periph_clk_is_enabled,
+	.enable = tegra20_periph_clk_enable,
+	.disable = tegra20_periph_clk_disable,
+	.set_parent = tegra20_periph_clk_set_parent,
+	.get_parent = tegra20_periph_clk_get_parent,
+	.set_rate = tegra20_periph_clk_set_rate,
+	.round_rate = tegra20_periph_clk_round_rate,
+	.recalc_rate = tegra20_periph_clk_recalc_rate,
+};
+
+/* External memory controller clock ops */
+static void tegra20_emc_clk_init(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	c->max_rate = __clk_get_rate(hw->clk);
+}
+
+static long tegra20_emc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	long emc_rate;
+	long clk_rate;
+
+	/*
+	 * The slowest entry in the EMC clock table that is at least as
+	 * fast as rate.
+	 */
+	emc_rate = tegra_emc_round_rate(rate);
+	if (emc_rate < 0)
+		return c->max_rate;
+
+	/*
+	 * The fastest rate the PLL will generate that is at most the
+	 * requested rate.
+	 */
+	clk_rate = tegra20_periph_clk_round_rate(hw, emc_rate, NULL);
+
+	/*
+	 * If this fails, and emc_rate > clk_rate, it's because the maximum
+	 * rate in the EMC tables is larger than the maximum rate of the EMC
+	 * clock. The EMC clock's max rate is the rate it was running when the
+	 * kernel booted. Such a mismatch is probably due to using the wrong
+	 * BCT, i.e. using a Tegra20 BCT with an EMC table written for Tegra25.
+	 */
+	WARN_ONCE(emc_rate != clk_rate,
+		"emc_rate %ld != clk_rate %ld",
+		emc_rate, clk_rate);
+
+	return emc_rate;
+}
+
+static int tegra20_emc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	int ret;
+
+	/*
+	 * The Tegra2 memory controller has an interlock with the clock
+	 * block that allows memory shadowed registers to be updated,
+	 * and then transfer them to the main registers at the same
+	 * time as the clock update without glitches.
+	 */
+	ret = tegra_emc_set_rate(rate);
+	if (ret < 0)
+		return ret;
+
+	ret = tegra20_periph_clk_set_rate(hw, rate, parent_rate);
+	udelay(1);
+
+	return ret;
+}
+
+struct clk_ops tegra_emc_clk_ops = {
+	.init = tegra20_emc_clk_init,
+	.is_enabled = tegra20_periph_clk_is_enabled,
+	.enable = tegra20_periph_clk_enable,
+	.disable = tegra20_periph_clk_disable,
+	.set_parent = tegra20_periph_clk_set_parent,
+	.get_parent = tegra20_periph_clk_get_parent,
+	.set_rate = tegra20_emc_clk_set_rate,
+	.round_rate = tegra20_emc_clk_round_rate,
+	.recalc_rate = tegra20_periph_clk_recalc_rate,
+};
+
+/* Clock doubler ops */
+static int tegra20_clk_double_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+
+	c->state = ON;
+
+	if (!c->u.periph.clk_num)
+		goto out;
+
+	if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
+			PERIPH_CLK_TO_ENB_BIT(c)))
+		c->state = OFF;
+
+out:
+	return c->state;
+};
+
+static unsigned long tegra20_clk_double_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u64 rate = prate;
+
+	c->mul = 2;
+	c->div = 1;
+
+	rate *= c->mul;
+	rate += c->div - 1; /* round up */
+	do_div(rate, c->div);
+
+	return rate;
+}
+
+static long tegra20_clk_double_round_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long *prate)
+{
+	unsigned long output_rate = *prate;
+
+	do_div(output_rate, 2);
+	return output_rate;
+}
+
+static int tegra20_clk_double_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	if (rate != 2 * parent_rate)
+		return -EINVAL;
+	return 0;
+}
+
+struct clk_ops tegra_clk_double_ops = {
+	.is_enabled = tegra20_clk_double_is_enabled,
+	.enable = tegra20_periph_clk_enable,
+	.disable = tegra20_periph_clk_disable,
+	.set_rate = tegra20_clk_double_set_rate,
+	.recalc_rate = tegra20_clk_double_recalc_rate,
+	.round_rate = tegra20_clk_double_round_rate,
+};
+
+/* Audio sync clock ops */
+static int tegra20_audio_sync_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+
+	c->state = (val & (1<<4)) ? OFF : ON;
+	return c->state;
+}
+
+static int tegra20_audio_sync_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+
+	clk_writel(0, c->reg);
+	return 0;
+}
+
+static void tegra20_audio_sync_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	clk_writel(1, c->reg);
+}
+
+static u8 tegra20_audio_sync_clk_get_parent(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val = clk_readl(c->reg);
+	int source;
+
+	source = val & 0xf;
+	return source;
+}
+
+static int tegra20_audio_sync_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	u32 val;
+
+	val = clk_readl(c->reg);
+	val &= ~0xf;
+	val |= index;
+
+	clk_writel(val, c->reg);
+
+	return 0;
+}
+
+struct clk_ops tegra_audio_sync_clk_ops = {
+	.is_enabled = tegra20_audio_sync_clk_is_enabled,
+	.enable = tegra20_audio_sync_clk_enable,
+	.disable = tegra20_audio_sync_clk_disable,
+	.set_parent = tegra20_audio_sync_clk_set_parent,
+	.get_parent = tegra20_audio_sync_clk_get_parent,
+};
+
+/* cdev1 and cdev2 (dap_mclk1 and dap_mclk2) ops */
+
+static int tegra20_cdev_clk_is_enabled(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	/* We could un-tristate the cdev1 or cdev2 pingroup here; this is
+	 * currently done in the pinmux code. */
+	c->state = ON;
+
+	BUG_ON(!c->u.periph.clk_num);
+
+	if (!(clk_readl(CLK_OUT_ENB + PERIPH_CLK_TO_ENB_REG(c)) &
+			PERIPH_CLK_TO_ENB_BIT(c)))
+		c->state = OFF;
+	return c->state;
+}
+
+static int tegra20_cdev_clk_enable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	BUG_ON(!c->u.periph.clk_num);
+
+	clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+		CLK_OUT_ENB_SET + PERIPH_CLK_TO_ENB_SET_REG(c));
+	return 0;
+}
+
+static void tegra20_cdev_clk_disable(struct clk_hw *hw)
+{
+	struct clk_tegra *c = to_clk_tegra(hw);
+	BUG_ON(!c->u.periph.clk_num);
+
+	clk_writel(PERIPH_CLK_TO_ENB_BIT(c),
+		CLK_OUT_ENB_CLR + PERIPH_CLK_TO_ENB_SET_REG(c));
+}
+
+static unsigned long tegra20_cdev_recalc_rate(struct clk_hw *hw,
+			unsigned long prate)
+{
+	return to_clk_tegra(hw)->fixed_rate;
+}
+
+struct clk_ops tegra_cdev_clk_ops = {
+	.is_enabled = tegra20_cdev_clk_is_enabled,
+	.enable = tegra20_cdev_clk_enable,
+	.disable = tegra20_cdev_clk_disable,
+	.recalc_rate = tegra20_cdev_recalc_rate,
+};