[PATCH 05/23] ARM i.MX: initial clk support
Sascha Hauer
s.hauer at pengutronix.de
Mon Sep 24 07:04:34 EDT 2012
This adds the basic i.MX common clk support and some pll and pfd
drivers.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/mach-imx/Makefile | 1 +
arch/arm/mach-imx/clk-pfd.c | 148 ++++++++++++
arch/arm/mach-imx/clk-pllv1.c | 94 ++++++++
arch/arm/mach-imx/clk-pllv2.c | 164 +++++++++++++
arch/arm/mach-imx/clk-pllv3.c | 386 +++++++++++++++++++++++++++++++
arch/arm/mach-imx/clk.h | 66 ++++++
arch/arm/mach-imx/include/mach/clkdev.h | 7 +
7 files changed, 866 insertions(+)
create mode 100644 arch/arm/mach-imx/clk-pfd.c
create mode 100644 arch/arm/mach-imx/clk-pllv1.c
create mode 100644 arch/arm/mach-imx/clk-pllv2.c
create mode 100644 arch/arm/mach-imx/clk-pllv3.c
create mode 100644 arch/arm/mach-imx/clk.h
create mode 100644 arch/arm/mach-imx/include/mach/clkdev.h
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 2b595bc..f6d487f 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_IMX_IIM) += iim.o
obj-$(CONFIG_NAND_IMX) += nand.o
obj-$(CONFIG_ARCH_IMX_EXTERNAL_BOOT_NAND) += external-nand-boot.o
pbl-$(CONFIG_ARCH_IMX_EXTERNAL_BOOT_NAND) += external-nand-boot.o
+obj-$(CONFIG_COMMON_CLK) += clk-pllv1.o clk-pllv2.o clk-pllv3.o clk-pfd.o
obj-y += speed.o
obj-y += devices.o
obj-y += boot.o
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
new file mode 100644
index 0000000..8f6d5ad
--- /dev/null
+++ b/arch/arm/mach-imx/clk-pfd.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <malloc.h>
+#include <asm-generic/div64.h>
+
+#include "clk.h"
+
+/**
+ * struct clk_pfd - IMX PFD clock
+ * @clk_hw: clock source
+ * @reg: PFD register address
+ * @idx: the index of PFD encoded in the register
+ *
+ * PFD clock found on i.MX6 series. Each register for PFD has 4 clk_pfd
+ * data encoded, and member idx is used to specify the one. And each
+ * register has SET, CLR and TOG registers at offset 0x4 0x8 and 0xc.
+ */
+struct clk_pfd {
+ struct clk clk;
+ void __iomem *reg;
+ u8 idx;
+ const char *parent;
+};
+
+#define to_clk_pfd(_clk) container_of(_clk, struct clk_pfd, clk)
+
+#define SET 0x4
+#define CLR 0x8
+#define OTG 0xc
+
+static int clk_pfd_enable(struct clk *clk)
+{
+ struct clk_pfd *pfd = to_clk_pfd(clk);
+ writel(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + CLR);
+
+ return 0;
+}
+
+static void clk_pfd_disable(struct clk *clk)
+{
+ struct clk_pfd *pfd = to_clk_pfd(clk);
+
+ writel(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + SET);
+}
+
+static unsigned long clk_pfd_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pfd *pfd = to_clk_pfd(clk);
+ u64 tmp = parent_rate;
+ u8 frac = (readl(pfd->reg) >> (pfd->idx * 8)) & 0x3f;
+
+ tmp *= 18;
+ do_div(tmp, frac);
+
+ return tmp;
+}
+
+static long clk_pfd_round_rate(struct clk *clk, unsigned long rate,
+ unsigned long *prate)
+{
+ u64 tmp = *prate;
+ u8 frac;
+
+ tmp = tmp * 18 + rate / 2;
+ do_div(tmp, rate);
+ frac = tmp;
+ if (frac < 12)
+ frac = 12;
+ else if (frac > 35)
+ frac = 35;
+ tmp = *prate;
+ tmp *= 18;
+ do_div(tmp, frac);
+
+ return tmp;
+}
+
+static int clk_pfd_set_rate(struct clk *clk, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_pfd *pfd = to_clk_pfd(clk);
+ u64 tmp = parent_rate;
+ u8 frac;
+
+ tmp = tmp * 18 + rate / 2;
+ do_div(tmp, rate);
+ frac = tmp;
+ if (frac < 12)
+ frac = 12;
+ else if (frac > 35)
+ frac = 35;
+
+ writel(0x3f << (pfd->idx * 8), pfd->reg + CLR);
+ writel(frac << (pfd->idx * 8), pfd->reg + SET);
+
+ return 0;
+}
+
+static const struct clk_ops clk_pfd_ops = {
+ .enable = clk_pfd_enable,
+ .disable = clk_pfd_disable,
+ .recalc_rate = clk_pfd_recalc_rate,
+ .round_rate = clk_pfd_round_rate,
+ .set_rate = clk_pfd_set_rate,
+};
+
+struct clk *imx_clk_pfd(const char *name, const char *parent,
+ void __iomem *reg, u8 idx)
+{
+ struct clk_pfd *pfd;
+ int ret;
+
+ pfd = xzalloc(sizeof(*pfd));
+
+ pfd->reg = reg;
+ pfd->idx = idx;
+ pfd->parent = parent;
+ pfd->clk.name = name;
+ pfd->clk.ops = &clk_pfd_ops;
+ pfd->clk.parent_names = &pfd->parent;
+ pfd->clk.num_parents = 1;
+
+ ret = clk_register(&pfd->clk);
+ if (ret) {
+ free(pfd);
+ return ERR_PTR(ret);
+ }
+
+ return &pfd->clk;
+}
diff --git a/arch/arm/mach-imx/clk-pllv1.c b/arch/arm/mach-imx/clk-pllv1.c
new file mode 100644
index 0000000..6785da0
--- /dev/null
+++ b/arch/arm/mach-imx/clk-pllv1.c
@@ -0,0 +1,94 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <malloc.h>
+#include <asm-generic/div64.h>
+
+#include "clk.h"
+
+struct clk_pllv1 {
+ struct clk clk;
+ void __iomem *reg;
+ const char *parent;
+};
+
+static unsigned long clk_pllv1_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pllv1 *pll = container_of(clk, struct clk_pllv1, clk);
+ unsigned long long ll;
+ int mfn_abs;
+ unsigned int mfi, mfn, mfd, pd;
+ u32 reg_val = readl(pll->reg);
+ unsigned long freq = parent_rate;
+
+ mfi = (reg_val >> 10) & 0xf;
+ mfn = reg_val & 0x3ff;
+ mfd = (reg_val >> 16) & 0x3ff;
+ pd = (reg_val >> 26) & 0xf;
+
+ mfi = mfi <= 5 ? 5 : mfi;
+
+ mfn_abs = mfn;
+
+#if !defined CONFIG_ARCH_MX1 && !defined CONFIG_ARCH_MX21
+ if (mfn >= 0x200) {
+ mfn |= 0xFFFFFE00;
+ mfn_abs = -mfn;
+ }
+#endif
+
+ freq *= 2;
+ freq /= pd + 1;
+
+ ll = (unsigned long long)freq * mfn_abs;
+
+ do_div(ll, mfd + 1);
+ if (mfn < 0)
+ ll = -ll;
+ ll = (freq * mfi) + ll;
+
+ return ll;
+}
+
+struct clk_ops clk_pllv1_ops = {
+ .recalc_rate = clk_pllv1_recalc_rate,
+};
+
+struct clk *imx_clk_pllv1(const char *name, const char *parent,
+ void __iomem *base)
+{
+ struct clk_pllv1 *pll = xzalloc(sizeof(*pll));
+ int ret;
+
+ pll->parent = parent;
+ pll->reg = base;
+ pll->clk.ops = &clk_pllv1_ops;
+ pll->clk.name = name;
+ pll->clk.parent_names = &pll->parent;
+ pll->clk.num_parents = 1;
+
+ ret = clk_register(&pll->clk);
+ if (ret) {
+ free(pll);
+ return ERR_PTR(ret);
+ }
+
+ return &pll->clk;
+}
diff --git a/arch/arm/mach-imx/clk-pllv2.c b/arch/arm/mach-imx/clk-pllv2.c
new file mode 100644
index 0000000..6907269
--- /dev/null
+++ b/arch/arm/mach-imx/clk-pllv2.c
@@ -0,0 +1,164 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <mach/imx-regs.h>
+#include <malloc.h>
+#include <asm-generic/div64.h>
+
+#include "clk.h"
+
+/* PLL Register Offsets */
+#define MXC_PLL_DP_CTL 0x00
+#define MXC_PLL_DP_CONFIG 0x04
+#define MXC_PLL_DP_OP 0x08
+#define MXC_PLL_DP_MFD 0x0C
+#define MXC_PLL_DP_MFN 0x10
+#define MXC_PLL_DP_MFNMINUS 0x14
+#define MXC_PLL_DP_MFNPLUS 0x18
+#define MXC_PLL_DP_HFS_OP 0x1C
+#define MXC_PLL_DP_HFS_MFD 0x20
+#define MXC_PLL_DP_HFS_MFN 0x24
+#define MXC_PLL_DP_MFN_TOGC 0x28
+#define MXC_PLL_DP_DESTAT 0x2c
+
+/* PLL Register Bit definitions */
+#define MXC_PLL_DP_CTL_MUL_CTRL 0x2000
+#define MXC_PLL_DP_CTL_DPDCK0_2_EN 0x1000
+#define MXC_PLL_DP_CTL_DPDCK0_2_OFFSET 12
+#define MXC_PLL_DP_CTL_ADE 0x800
+#define MXC_PLL_DP_CTL_REF_CLK_DIV 0x400
+#define MXC_PLL_DP_CTL_REF_CLK_SEL_MASK (3 << 8)
+#define MXC_PLL_DP_CTL_REF_CLK_SEL_OFFSET 8
+#define MXC_PLL_DP_CTL_HFSM 0x80
+#define MXC_PLL_DP_CTL_PRE 0x40
+#define MXC_PLL_DP_CTL_UPEN 0x20
+#define MXC_PLL_DP_CTL_RST 0x10
+#define MXC_PLL_DP_CTL_RCP 0x8
+#define MXC_PLL_DP_CTL_PLM 0x4
+#define MXC_PLL_DP_CTL_BRM0 0x2
+#define MXC_PLL_DP_CTL_LRF 0x1
+
+#define MXC_PLL_DP_CONFIG_BIST 0x8
+#define MXC_PLL_DP_CONFIG_SJC_CE 0x4
+#define MXC_PLL_DP_CONFIG_AREN 0x2
+#define MXC_PLL_DP_CONFIG_LDREQ 0x1
+
+#define MXC_PLL_DP_OP_MFI_OFFSET 4
+#define MXC_PLL_DP_OP_MFI_MASK (0xF << 4)
+#define MXC_PLL_DP_OP_PDF_OFFSET 0
+#define MXC_PLL_DP_OP_PDF_MASK 0xF
+
+#define MXC_PLL_DP_MFD_OFFSET 0
+#define MXC_PLL_DP_MFD_MASK 0x07FFFFFF
+
+#define MXC_PLL_DP_MFN_OFFSET 0x0
+#define MXC_PLL_DP_MFN_MASK 0x07FFFFFF
+
+#define MXC_PLL_DP_MFN_TOGC_TOG_DIS (1 << 17)
+#define MXC_PLL_DP_MFN_TOGC_TOG_EN (1 << 16)
+#define MXC_PLL_DP_MFN_TOGC_CNT_OFFSET 0x0
+#define MXC_PLL_DP_MFN_TOGC_CNT_MASK 0xFFFF
+
+#define MXC_PLL_DP_DESTAT_TOG_SEL (1 << 31)
+#define MXC_PLL_DP_DESTAT_MFN 0x07FFFFFF
+
+#define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
+
+struct clk_pllv2 {
+ struct clk clk;
+ void __iomem *reg;
+ const char *parent;
+};
+
+static unsigned long __clk_pllv2_recalc_rate(unsigned long parent_rate,
+ u32 dp_ctl, u32 dp_op, u32 dp_mfd, u32 dp_mfn)
+{
+ long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
+ unsigned long dbl;
+ uint64_t temp;
+
+ dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
+
+ pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
+ mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
+ mfi = (mfi <= 5) ? 5 : mfi;
+ mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
+ mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
+ /* Sign extend to 32-bits */
+ if (mfn >= 0x04000000) {
+ mfn |= 0xFC000000;
+ mfn_abs = -mfn;
+ }
+
+ ref_clk = 2 * parent_rate;
+ if (dbl != 0)
+ ref_clk *= 2;
+
+ ref_clk /= (pdf + 1);
+ temp = (u64) ref_clk * mfn_abs;
+ do_div(temp, mfd + 1);
+ if (mfn < 0)
+ temp = -temp;
+ temp = (ref_clk * mfi) + temp;
+
+ return temp;
+}
+
+static unsigned long clk_pllv2_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ u32 dp_op, dp_mfd, dp_mfn, dp_ctl;
+ void __iomem *pllbase;
+ struct clk_pllv2 *pll = container_of(clk, struct clk_pllv2, clk);
+
+ pllbase = pll->reg;
+
+ dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
+ dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
+ dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
+ dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
+
+ return __clk_pllv2_recalc_rate(parent_rate, dp_ctl, dp_op, dp_mfd, dp_mfn);
+}
+
+struct clk_ops clk_pllv2_ops = {
+ .recalc_rate = clk_pllv2_recalc_rate,
+};
+
+struct clk *imx_clk_pllv2(const char *name, const char *parent,
+ void __iomem *base)
+{
+ struct clk_pllv2 *pll = xzalloc(sizeof(*pll));
+ int ret;
+
+ pll->parent = parent;
+ pll->reg = base;
+ pll->clk.ops = &clk_pllv2_ops;
+ pll->clk.name = name;
+ pll->clk.parent_names = &pll->parent;
+ pll->clk.num_parents = 1;
+
+ ret = clk_register(&pll->clk);
+ if (ret) {
+ free(pll);
+ return ERR_PTR(ret);
+ }
+
+ return &pll->clk;
+}
diff --git a/arch/arm/mach-imx/clk-pllv3.c b/arch/arm/mach-imx/clk-pllv3.c
new file mode 100644
index 0000000..a99eec5
--- /dev/null
+++ b/arch/arm/mach-imx/clk-pllv3.c
@@ -0,0 +1,386 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <mach/imx-regs.h>
+#include <malloc.h>
+#include <clock.h>
+#include <asm-generic/div64.h>
+
+#include "clk.h"
+
+#define PLL_NUM_OFFSET 0x10
+#define PLL_DENOM_OFFSET 0x20
+
+#define BM_PLL_POWER (0x1 << 12)
+#define BM_PLL_ENABLE (0x1 << 13)
+#define BM_PLL_BYPASS (0x1 << 16)
+#define BM_PLL_LOCK (0x1 << 31)
+
+struct clk_pllv3 {
+ struct clk clk;
+ void __iomem *base;
+ bool powerup_set;
+ u32 gate_mask;
+ u32 div_mask;
+ const char *parent;
+};
+
+#define to_clk_pllv3(_clk) container_of(_clk, struct clk_pllv3, clk)
+
+static int clk_pllv3_enable(struct clk *clk)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 val;
+ int ret;
+
+ val = readl(pll->base);
+ val &= ~BM_PLL_BYPASS;
+ if (pll->powerup_set)
+ val |= BM_PLL_POWER;
+ else
+ val &= ~BM_PLL_POWER;
+ writel(val, pll->base);
+
+ /* Wait for PLL to lock */
+ ret = wait_on_timeout(10 * MSECOND, !(readl(pll->base) & BM_PLL_LOCK));
+ if (ret)
+ return ret;
+
+ val = readl(pll->base);
+ val |= pll->gate_mask;
+ writel(val, pll->base);
+
+ return 0;
+}
+
+static void clk_pllv3_disable(struct clk *clk)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 val;
+
+ val = readl(pll->base);
+ val &= ~pll->gate_mask;
+ writel(val, pll->base);
+
+ val |= BM_PLL_BYPASS;
+ if (pll->powerup_set)
+ val &= ~BM_PLL_POWER;
+ else
+ val |= BM_PLL_POWER;
+ writel(val, pll->base);
+}
+
+static unsigned long clk_pllv3_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 div = readl(pll->base) & pll->div_mask;
+
+ return (div == 1) ? parent_rate * 22 : parent_rate * 20;
+}
+
+static long clk_pllv3_round_rate(struct clk *clk, unsigned long rate,
+ unsigned long *prate)
+{
+ unsigned long parent_rate = *prate;
+
+ return (rate >= parent_rate * 22) ? parent_rate * 22 :
+ parent_rate * 20;
+}
+
+static int clk_pllv3_set_rate(struct clk *clk, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 val, div;
+
+ if (rate == parent_rate * 22)
+ div = 1;
+ else if (rate == parent_rate * 20)
+ div = 0;
+ else
+ return -EINVAL;
+
+ val = readl(pll->base);
+ val &= ~pll->div_mask;
+ val |= div;
+ writel(val, pll->base);
+
+ return 0;
+}
+
+static const struct clk_ops clk_pllv3_ops = {
+ .enable = clk_pllv3_enable,
+ .disable = clk_pllv3_disable,
+ .recalc_rate = clk_pllv3_recalc_rate,
+ .round_rate = clk_pllv3_round_rate,
+ .set_rate = clk_pllv3_set_rate,
+};
+
+static unsigned long clk_pllv3_sys_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 div = readl(pll->base) & pll->div_mask;
+
+ return parent_rate * div / 2;
+}
+
+static long clk_pllv3_sys_round_rate(struct clk *clk, unsigned long rate,
+ unsigned long *prate)
+{
+ unsigned long parent_rate = *prate;
+ unsigned long min_rate = parent_rate * 54 / 2;
+ unsigned long max_rate = parent_rate * 108 / 2;
+ u32 div;
+
+ if (rate > max_rate)
+ rate = max_rate;
+ else if (rate < min_rate)
+ rate = min_rate;
+ div = rate * 2 / parent_rate;
+
+ return parent_rate * div / 2;
+}
+
+static int clk_pllv3_sys_set_rate(struct clk *clk, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ unsigned long min_rate = parent_rate * 54 / 2;
+ unsigned long max_rate = parent_rate * 108 / 2;
+ u32 val, div;
+
+ if (rate < min_rate || rate > max_rate)
+ return -EINVAL;
+
+ div = rate * 2 / parent_rate;
+ val = readl(pll->base);
+ val &= ~pll->div_mask;
+ val |= div;
+ writel(val, pll->base);
+
+ return 0;
+}
+
+static const struct clk_ops clk_pllv3_sys_ops = {
+ .enable = clk_pllv3_enable,
+ .disable = clk_pllv3_disable,
+ .recalc_rate = clk_pllv3_sys_recalc_rate,
+ .round_rate = clk_pllv3_sys_round_rate,
+ .set_rate = clk_pllv3_sys_set_rate,
+};
+
+static unsigned long clk_pllv3_av_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 mfn = readl(pll->base + PLL_NUM_OFFSET);
+ u32 mfd = readl(pll->base + PLL_DENOM_OFFSET);
+ u32 div = readl(pll->base) & pll->div_mask;
+
+ return (parent_rate * div) + ((parent_rate / mfd) * mfn);
+}
+
+static long clk_pllv3_av_round_rate(struct clk *clk, unsigned long rate,
+ unsigned long *prate)
+{
+ unsigned long parent_rate = *prate;
+ unsigned long min_rate = parent_rate * 27;
+ unsigned long max_rate = parent_rate * 54;
+ u32 div;
+ u32 mfn, mfd = 1000000;
+ u64 temp64;
+
+ if (rate > max_rate)
+ rate = max_rate;
+ else if (rate < min_rate)
+ rate = min_rate;
+
+ div = rate / parent_rate;
+ temp64 = (u64) (rate - div * parent_rate);
+ temp64 *= mfd;
+ do_div(temp64, parent_rate);
+ mfn = temp64;
+
+ return parent_rate * div + parent_rate / mfd * mfn;
+}
+
+static int clk_pllv3_av_set_rate(struct clk *clk, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ unsigned long min_rate = parent_rate * 27;
+ unsigned long max_rate = parent_rate * 54;
+ u32 val, div;
+ u32 mfn, mfd = 1000000;
+ u64 temp64;
+
+ if (rate < min_rate || rate > max_rate)
+ return -EINVAL;
+
+ div = rate / parent_rate;
+ temp64 = (u64) (rate - div * parent_rate);
+ temp64 *= mfd;
+ do_div(temp64, parent_rate);
+ mfn = temp64;
+
+ val = readl(pll->base);
+ val &= ~pll->div_mask;
+ val |= div;
+ writel(val, pll->base);
+ writel(mfn, pll->base + PLL_NUM_OFFSET);
+ writel(mfd, pll->base + PLL_DENOM_OFFSET);
+
+ return 0;
+}
+
+static const struct clk_ops clk_pllv3_av_ops = {
+ .enable = clk_pllv3_enable,
+ .disable = clk_pllv3_disable,
+ .recalc_rate = clk_pllv3_av_recalc_rate,
+ .round_rate = clk_pllv3_av_round_rate,
+ .set_rate = clk_pllv3_av_set_rate,
+};
+
+static unsigned long clk_pllv3_enet_recalc_rate(struct clk *clk,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 div = readl(pll->base) & pll->div_mask;
+
+ switch (div) {
+ case 0:
+ return 25000000;
+ case 1:
+ return 50000000;
+ case 2:
+ return 100000000;
+ case 3:
+ return 125000000;
+ }
+
+ return 0;
+}
+
+static long clk_pllv3_enet_round_rate(struct clk *clk, unsigned long rate,
+ unsigned long *prate)
+{
+ if (rate >= 125000000)
+ rate = 125000000;
+ else if (rate >= 100000000)
+ rate = 100000000;
+ else if (rate >= 50000000)
+ rate = 50000000;
+ else
+ rate = 25000000;
+ return rate;
+}
+
+static int clk_pllv3_enet_set_rate(struct clk *clk, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_pllv3 *pll = to_clk_pllv3(clk);
+ u32 val, div;
+
+ switch (rate) {
+ case 25000000:
+ div = 0;
+ break;
+ case 50000000:
+ div = 1;
+ break;
+ case 100000000:
+ div = 2;
+ break;
+ case 125000000:
+ div = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val = readl(pll->base);
+ val &= ~pll->div_mask;
+ val |= div;
+ writel(val, pll->base);
+
+ return 0;
+}
+
+static const struct clk_ops clk_pllv3_enet_ops = {
+ .enable = clk_pllv3_enable,
+ .disable = clk_pllv3_disable,
+ .recalc_rate = clk_pllv3_enet_recalc_rate,
+ .round_rate = clk_pllv3_enet_round_rate,
+ .set_rate = clk_pllv3_enet_set_rate,
+};
+
+static const struct clk_ops clk_pllv3_mlb_ops = {
+ .enable = clk_pllv3_enable,
+ .disable = clk_pllv3_disable,
+};
+
+struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
+ const char *parent, void __iomem *base,
+ u32 gate_mask, u32 div_mask)
+{
+ struct clk_pllv3 *pll;
+ const struct clk_ops *ops;
+ int ret;
+
+ pll = xzalloc(sizeof(*pll));
+
+ switch (type) {
+ case IMX_PLLV3_SYS:
+ ops = &clk_pllv3_sys_ops;
+ break;
+ case IMX_PLLV3_USB:
+ ops = &clk_pllv3_ops;
+ pll->powerup_set = true;
+ break;
+ case IMX_PLLV3_AV:
+ ops = &clk_pllv3_av_ops;
+ break;
+ case IMX_PLLV3_ENET:
+ ops = &clk_pllv3_enet_ops;
+ break;
+ case IMX_PLLV3_MLB:
+ ops = &clk_pllv3_mlb_ops;
+ break;
+ default:
+ ops = &clk_pllv3_ops;
+ }
+ pll->base = base;
+ pll->gate_mask = gate_mask;
+ pll->div_mask = div_mask;
+ pll->parent = parent;
+ pll->clk.ops = ops;
+ pll->clk.name = name;
+ pll->clk.parent_names = &pll->parent;
+ pll->clk.num_parents = 1;
+
+ ret = clk_register(&pll->clk);
+ if (ret) {
+ free(pll);
+ return ERR_PTR(ret);
+ }
+
+ return &pll->clk;
+}
diff --git a/arch/arm/mach-imx/clk.h b/arch/arm/mach-imx/clk.h
new file mode 100644
index 0000000..5024a25
--- /dev/null
+++ b/arch/arm/mach-imx/clk.h
@@ -0,0 +1,66 @@
+#ifndef __IMX_CLK_H
+#define __IMX_CLK_H
+
+static inline struct clk *imx_clk_divider(const char *name, const char *parent,
+ void __iomem *reg, u8 shift, u8 width)
+{
+ return clk_divider(name, parent, reg, shift, width);
+}
+
+static inline struct clk *imx_clk_fixed_factor(const char *name,
+ const char *parent, unsigned int mult, unsigned int div)
+{
+ return clk_fixed_factor(name, parent, mult, div);
+}
+
+static inline struct clk *imx_clk_mux(const char *name, void __iomem *reg,
+ u8 shift, u8 width, const char **parents, int num_parents)
+{
+ return clk_mux(name, reg, shift, width, parents, num_parents);
+}
+
+struct clk *imx_clk_pllv1(const char *name, const char *parent,
+ void __iomem *base);
+
+struct clk *imx_clk_pllv2(const char *name, const char *parent,
+ void __iomem *base);
+
+enum imx_pllv3_type {
+ IMX_PLLV3_GENERIC,
+ IMX_PLLV3_SYS,
+ IMX_PLLV3_USB,
+ IMX_PLLV3_AV,
+ IMX_PLLV3_ENET,
+ IMX_PLLV3_MLB,
+};
+
+struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
+ const char *parent, void __iomem *base,
+ u32 gate_mask, u32 div_mask);
+
+struct clk *imx_clk_pfd(const char *name, const char *parent,
+ void __iomem *reg, u8 idx);
+
+static inline struct clk *imx_clk_busy_divider(const char *name, const char *parent,
+ void __iomem *reg, u8 shift, u8 width,
+ void __iomem *busy_reg, u8 busy_shift)
+{
+ /*
+ * For now we do not support rate setting, so just fall back to
+ * regular divider.
+ */
+ return imx_clk_divider(name, parent, reg, shift, width);
+}
+
+static inline struct clk *imx_clk_busy_mux(const char *name, void __iomem *reg, u8 shift,
+ u8 width, void __iomem *busy_reg, u8 busy_shift,
+ const char **parents, int num_parents)
+{
+ /*
+ * For now we do not support mux switching, so just fall back to
+ * regular mux.
+ */
+ return imx_clk_mux(name, reg, shift, width, parents, num_parents);
+}
+
+#endif /* __IMX_CLK_H */
diff --git a/arch/arm/mach-imx/include/mach/clkdev.h b/arch/arm/mach-imx/include/mach/clkdev.h
new file mode 100644
index 0000000..04b37a8
--- /dev/null
+++ b/arch/arm/mach-imx/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
--
1.7.10.4
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