v4.19.13 snapshot.
diff --git a/drivers/clk/versatile/Kconfig b/drivers/clk/versatile/Kconfig
new file mode 100644
index 0000000..8aa875f
--- /dev/null
+++ b/drivers/clk/versatile/Kconfig
@@ -0,0 +1,32 @@
+config ICST
+ bool
+
+config COMMON_CLK_VERSATILE
+ bool "Clock driver for ARM Reference designs"
+ depends on ARCH_INTEGRATOR || ARCH_REALVIEW || \
+ ARCH_VERSATILE || ARCH_VEXPRESS || ARM64 || \
+ COMPILE_TEST
+ select REGMAP_MMIO
+ ---help---
+ Supports clocking on ARM Reference designs:
+ - Integrator/AP and Integrator/CP
+ - RealView PB1176, EB, PB11MP and PBX
+ - Versatile Express
+
+config CLK_SP810
+ bool "Clock driver for ARM SP810 System Controller"
+ depends on COMMON_CLK_VERSATILE
+ default y if ARCH_VEXPRESS
+ ---help---
+ Supports clock muxing (REFCLK/TIMCLK to TIMERCLKEN0-3) capabilities
+ of the ARM SP810 System Controller cell.
+
+config CLK_VEXPRESS_OSC
+ bool "Clock driver for Versatile Express OSC clock generators"
+ depends on COMMON_CLK_VERSATILE
+ depends on VEXPRESS_CONFIG
+ default y if ARCH_VEXPRESS
+ ---help---
+ Simple regmap-based driver driving clock generators on Versatile
+ Express platforms hidden behind its configuration infrastructure,
+ commonly known as OSCs.
diff --git a/drivers/clk/versatile/Makefile b/drivers/clk/versatile/Makefile
new file mode 100644
index 0000000..58b54b8
--- /dev/null
+++ b/drivers/clk/versatile/Makefile
@@ -0,0 +1,5 @@
+# Makefile for Versatile-specific clocks
+obj-$(CONFIG_ICST) += icst.o clk-icst.o clk-versatile.o
+obj-$(CONFIG_INTEGRATOR_IMPD1) += clk-impd1.o
+obj-$(CONFIG_CLK_SP810) += clk-sp810.o
+obj-$(CONFIG_CLK_VEXPRESS_OSC) += clk-vexpress-osc.o
diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-icst.c
new file mode 100644
index 0000000..dafe7a4
--- /dev/null
+++ b/drivers/clk/versatile/clk-icst.c
@@ -0,0 +1,578 @@
+/*
+ * Driver for the ICST307 VCO clock found in the ARM Reference designs.
+ * We wrap the custom interface from <asm/hardware/icst.h> into the generic
+ * clock framework.
+ *
+ * Copyright (C) 2012-2015 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * TODO: when all ARM reference designs are migrated to generic clocks, the
+ * ICST clock code from the ARM tree should probably be merged into this
+ * file.
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include "icst.h"
+#include "clk-icst.h"
+
+/* Magic unlocking token used on all Versatile boards */
+#define VERSATILE_LOCK_VAL 0xA05F
+
+#define VERSATILE_AUX_OSC_BITS 0x7FFFF
+#define INTEGRATOR_AP_CM_BITS 0xFF
+#define INTEGRATOR_AP_SYS_BITS 0xFF
+#define INTEGRATOR_CP_CM_CORE_BITS 0x7FF
+#define INTEGRATOR_CP_CM_MEM_BITS 0x7FF000
+
+#define INTEGRATOR_AP_PCI_25_33_MHZ BIT(8)
+
+/**
+ * enum icst_control_type - the type of ICST control register
+ */
+enum icst_control_type {
+ ICST_VERSATILE, /* The standard type, all control bits available */
+ ICST_INTEGRATOR_AP_CM, /* Only 8 bits of VDW available */
+ ICST_INTEGRATOR_AP_SYS, /* Only 8 bits of VDW available */
+ ICST_INTEGRATOR_AP_PCI, /* Odd bit pattern storage */
+ ICST_INTEGRATOR_CP_CM_CORE, /* Only 8 bits of VDW and 3 bits of OD */
+ ICST_INTEGRATOR_CP_CM_MEM, /* Only 8 bits of VDW and 3 bits of OD */
+};
+
+/**
+ * struct clk_icst - ICST VCO clock wrapper
+ * @hw: corresponding clock hardware entry
+ * @vcoreg: VCO register address
+ * @lockreg: VCO lock register address
+ * @params: parameters for this ICST instance
+ * @rate: current rate
+ * @ctype: the type of control register for the ICST
+ */
+struct clk_icst {
+ struct clk_hw hw;
+ struct regmap *map;
+ u32 vcoreg_off;
+ u32 lockreg_off;
+ struct icst_params *params;
+ unsigned long rate;
+ enum icst_control_type ctype;
+};
+
+#define to_icst(_hw) container_of(_hw, struct clk_icst, hw)
+
+/**
+ * vco_get() - get ICST VCO settings from a certain ICST
+ * @icst: the ICST clock to get
+ * @vco: the VCO struct to return the value in
+ */
+static int vco_get(struct clk_icst *icst, struct icst_vco *vco)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(icst->map, icst->vcoreg_off, &val);
+ if (ret)
+ return ret;
+
+ /*
+ * The Integrator/AP core clock can only access the low eight
+ * bits of the v PLL divider. Bit 8 is tied low and always zero,
+ * r is hardwired to 22 and output divider s is hardwired to 1
+ * (divide by 2) according to the document
+ * "Integrator CM926EJ-S, CM946E-S, CM966E-S, CM1026EJ-S and
+ * CM1136JF-S User Guide" ARM DUI 0138E, page 3-13 thru 3-14.
+ */
+ if (icst->ctype == ICST_INTEGRATOR_AP_CM) {
+ vco->v = val & INTEGRATOR_AP_CM_BITS;
+ vco->r = 22;
+ vco->s = 1;
+ return 0;
+ }
+
+ /*
+ * The Integrator/AP system clock on the base board can only
+ * access the low eight bits of the v PLL divider. Bit 8 is tied low
+ * and always zero, r is hardwired to 46, and the output divider is
+ * hardwired to 3 (divide by 4) according to the document
+ * "Integrator AP ASIC Development Motherboard" ARM DUI 0098B,
+ * page 3-16.
+ */
+ if (icst->ctype == ICST_INTEGRATOR_AP_SYS) {
+ vco->v = val & INTEGRATOR_AP_SYS_BITS;
+ vco->r = 46;
+ vco->s = 3;
+ return 0;
+ }
+
+ /*
+ * The Integrator/AP PCI clock is using an odd pattern to create
+ * the child clock, basically a single bit called DIVX/Y is used
+ * to select between two different hardwired values: setting the
+ * bit to 0 yields v = 17, r = 22 and OD = 1, whereas setting the
+ * bit to 1 yields v = 14, r = 14 and OD = 1 giving the frequencies
+ * 33 or 25 MHz respectively.
+ */
+ if (icst->ctype == ICST_INTEGRATOR_AP_PCI) {
+ bool divxy = !!(val & INTEGRATOR_AP_PCI_25_33_MHZ);
+
+ vco->v = divxy ? 17 : 14;
+ vco->r = divxy ? 22 : 14;
+ vco->s = 1;
+ return 0;
+ }
+
+ /*
+ * The Integrator/CP core clock can access the low eight bits
+ * of the v PLL divider. Bit 8 is tied low and always zero,
+ * r is hardwired to 22 and the output divider s is accessible
+ * in bits 8 thru 10 according to the document
+ * "Integrator/CM940T, CM920T, CM740T, and CM720T User Guide"
+ * ARM DUI 0157A, page 3-20 thru 3-23 and 4-10.
+ */
+ if (icst->ctype == ICST_INTEGRATOR_CP_CM_CORE) {
+ vco->v = val & 0xFF;
+ vco->r = 22;
+ vco->s = (val >> 8) & 7;
+ return 0;
+ }
+
+ if (icst->ctype == ICST_INTEGRATOR_CP_CM_MEM) {
+ vco->v = (val >> 12) & 0xFF;
+ vco->r = 22;
+ vco->s = (val >> 20) & 7;
+ return 0;
+ }
+
+ vco->v = val & 0x1ff;
+ vco->r = (val >> 9) & 0x7f;
+ vco->s = (val >> 16) & 03;
+ return 0;
+}
+
+/**
+ * vco_set() - commit changes to an ICST VCO
+ * @icst: the ICST clock to set
+ * @vco: the VCO struct to set the changes from
+ */
+static int vco_set(struct clk_icst *icst, struct icst_vco vco)
+{
+ u32 mask;
+ u32 val;
+ int ret;
+
+ /* Mask the bits used by the VCO */
+ switch (icst->ctype) {
+ case ICST_INTEGRATOR_AP_CM:
+ mask = INTEGRATOR_AP_CM_BITS;
+ val = vco.v & 0xFF;
+ if (vco.v & 0x100)
+ pr_err("ICST error: tried to set bit 8 of VDW\n");
+ if (vco.s != 1)
+ pr_err("ICST error: tried to use VOD != 1\n");
+ if (vco.r != 22)
+ pr_err("ICST error: tried to use RDW != 22\n");
+ break;
+ case ICST_INTEGRATOR_AP_SYS:
+ mask = INTEGRATOR_AP_SYS_BITS;
+ val = vco.v & 0xFF;
+ if (vco.v & 0x100)
+ pr_err("ICST error: tried to set bit 8 of VDW\n");
+ if (vco.s != 3)
+ pr_err("ICST error: tried to use VOD != 1\n");
+ if (vco.r != 46)
+ pr_err("ICST error: tried to use RDW != 22\n");
+ break;
+ case ICST_INTEGRATOR_CP_CM_CORE:
+ mask = INTEGRATOR_CP_CM_CORE_BITS; /* Uses 12 bits */
+ val = (vco.v & 0xFF) | vco.s << 8;
+ if (vco.v & 0x100)
+ pr_err("ICST error: tried to set bit 8 of VDW\n");
+ if (vco.r != 22)
+ pr_err("ICST error: tried to use RDW != 22\n");
+ break;
+ case ICST_INTEGRATOR_CP_CM_MEM:
+ mask = INTEGRATOR_CP_CM_MEM_BITS; /* Uses 12 bits */
+ val = ((vco.v & 0xFF) << 12) | (vco.s << 20);
+ if (vco.v & 0x100)
+ pr_err("ICST error: tried to set bit 8 of VDW\n");
+ if (vco.r != 22)
+ pr_err("ICST error: tried to use RDW != 22\n");
+ break;
+ default:
+ /* Regular auxilary oscillator */
+ mask = VERSATILE_AUX_OSC_BITS;
+ val = vco.v | (vco.r << 9) | (vco.s << 16);
+ break;
+ }
+
+ pr_debug("ICST: new val = 0x%08x\n", val);
+
+ /* This magic unlocks the VCO so it can be controlled */
+ ret = regmap_write(icst->map, icst->lockreg_off, VERSATILE_LOCK_VAL);
+ if (ret)
+ return ret;
+ ret = regmap_update_bits(icst->map, icst->vcoreg_off, mask, val);
+ if (ret)
+ return ret;
+ /* This locks the VCO again */
+ ret = regmap_write(icst->map, icst->lockreg_off, 0);
+ if (ret)
+ return ret;
+ return 0;
+}
+
+static unsigned long icst_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_icst *icst = to_icst(hw);
+ struct icst_vco vco;
+ int ret;
+
+ if (parent_rate)
+ icst->params->ref = parent_rate;
+ ret = vco_get(icst, &vco);
+ if (ret) {
+ pr_err("ICST: could not get VCO setting\n");
+ return 0;
+ }
+ icst->rate = icst_hz(icst->params, vco);
+ return icst->rate;
+}
+
+static long icst_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct clk_icst *icst = to_icst(hw);
+ struct icst_vco vco;
+
+ if (icst->ctype == ICST_INTEGRATOR_AP_CM ||
+ icst->ctype == ICST_INTEGRATOR_CP_CM_CORE) {
+ if (rate <= 12000000)
+ return 12000000;
+ if (rate >= 160000000)
+ return 160000000;
+ /* Slam to closest megahertz */
+ return DIV_ROUND_CLOSEST(rate, 1000000) * 1000000;
+ }
+
+ if (icst->ctype == ICST_INTEGRATOR_CP_CM_MEM) {
+ if (rate <= 6000000)
+ return 6000000;
+ if (rate >= 66000000)
+ return 66000000;
+ /* Slam to closest 0.5 megahertz */
+ return DIV_ROUND_CLOSEST(rate, 500000) * 500000;
+ }
+
+ if (icst->ctype == ICST_INTEGRATOR_AP_SYS) {
+ /* Divides between 3 and 50 MHz in steps of 0.25 MHz */
+ if (rate <= 3000000)
+ return 3000000;
+ if (rate >= 50000000)
+ return 5000000;
+ /* Slam to closest 0.25 MHz */
+ return DIV_ROUND_CLOSEST(rate, 250000) * 250000;
+ }
+
+ if (icst->ctype == ICST_INTEGRATOR_AP_PCI) {
+ /*
+ * If we're below or less than halfway from 25 to 33 MHz
+ * select 25 MHz
+ */
+ if (rate <= 25000000 || rate < 29000000)
+ return 25000000;
+ /* Else just return the default frequency */
+ return 33000000;
+ }
+
+ vco = icst_hz_to_vco(icst->params, rate);
+ return icst_hz(icst->params, vco);
+}
+
+static int icst_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_icst *icst = to_icst(hw);
+ struct icst_vco vco;
+
+ if (icst->ctype == ICST_INTEGRATOR_AP_PCI) {
+ /* This clock is especially primitive */
+ unsigned int val;
+ int ret;
+
+ if (rate == 25000000) {
+ val = 0;
+ } else if (rate == 33000000) {
+ val = INTEGRATOR_AP_PCI_25_33_MHZ;
+ } else {
+ pr_err("ICST: cannot set PCI frequency %lu\n",
+ rate);
+ return -EINVAL;
+ }
+ ret = regmap_write(icst->map, icst->lockreg_off,
+ VERSATILE_LOCK_VAL);
+ if (ret)
+ return ret;
+ ret = regmap_update_bits(icst->map, icst->vcoreg_off,
+ INTEGRATOR_AP_PCI_25_33_MHZ,
+ val);
+ if (ret)
+ return ret;
+ /* This locks the VCO again */
+ ret = regmap_write(icst->map, icst->lockreg_off, 0);
+ if (ret)
+ return ret;
+ return 0;
+ }
+
+ if (parent_rate)
+ icst->params->ref = parent_rate;
+ vco = icst_hz_to_vco(icst->params, rate);
+ icst->rate = icst_hz(icst->params, vco);
+ return vco_set(icst, vco);
+}
+
+static const struct clk_ops icst_ops = {
+ .recalc_rate = icst_recalc_rate,
+ .round_rate = icst_round_rate,
+ .set_rate = icst_set_rate,
+};
+
+static struct clk *icst_clk_setup(struct device *dev,
+ const struct clk_icst_desc *desc,
+ const char *name,
+ const char *parent_name,
+ struct regmap *map,
+ enum icst_control_type ctype)
+{
+ struct clk *clk;
+ struct clk_icst *icst;
+ struct clk_init_data init;
+ struct icst_params *pclone;
+
+ icst = kzalloc(sizeof(*icst), GFP_KERNEL);
+ if (!icst)
+ return ERR_PTR(-ENOMEM);
+
+ pclone = kmemdup(desc->params, sizeof(*pclone), GFP_KERNEL);
+ if (!pclone) {
+ kfree(icst);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.ops = &icst_ops;
+ init.flags = 0;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ icst->map = map;
+ icst->hw.init = &init;
+ icst->params = pclone;
+ icst->vcoreg_off = desc->vco_offset;
+ icst->lockreg_off = desc->lock_offset;
+ icst->ctype = ctype;
+
+ clk = clk_register(dev, &icst->hw);
+ if (IS_ERR(clk)) {
+ kfree(pclone);
+ kfree(icst);
+ }
+
+ return clk;
+}
+
+struct clk *icst_clk_register(struct device *dev,
+ const struct clk_icst_desc *desc,
+ const char *name,
+ const char *parent_name,
+ void __iomem *base)
+{
+ struct regmap_config icst_regmap_conf = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ };
+ struct regmap *map;
+
+ map = regmap_init_mmio(dev, base, &icst_regmap_conf);
+ if (IS_ERR(map)) {
+ pr_err("could not initialize ICST regmap\n");
+ return ERR_CAST(map);
+ }
+ return icst_clk_setup(dev, desc, name, parent_name, map,
+ ICST_VERSATILE);
+}
+EXPORT_SYMBOL_GPL(icst_clk_register);
+
+#ifdef CONFIG_OF
+/*
+ * In a device tree, an memory-mapped ICST clock appear as a child
+ * of a syscon node. Assume this and probe it only as a child of a
+ * syscon.
+ */
+
+static const struct icst_params icst525_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 8,
+ .vd_max = 263,
+ .rd_min = 3,
+ .rd_max = 65,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct icst_params icst307_params = {
+ .vco_max = ICST307_VCO_MAX,
+ .vco_min = ICST307_VCO_MIN,
+ .vd_min = 4 + 8,
+ .vd_max = 511 + 8,
+ .rd_min = 1 + 2,
+ .rd_max = 127 + 2,
+ .s2div = icst307_s2div,
+ .idx2s = icst307_idx2s,
+};
+
+/**
+ * The core modules on the Integrator/AP and Integrator/CP have
+ * especially crippled ICST525 control.
+ */
+static const struct icst_params icst525_apcp_cm_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ /* Minimum 12 MHz, VDW = 4 */
+ .vd_min = 12,
+ /*
+ * Maximum 160 MHz, VDW = 152 for all core modules, but
+ * CM926EJ-S, CM1026EJ-S and CM1136JF-S can actually
+ * go to 200 MHz (max VDW = 192).
+ */
+ .vd_max = 192,
+ /* r is hardcoded to 22 and this is the actual divisor, +2 */
+ .rd_min = 24,
+ .rd_max = 24,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct icst_params icst525_ap_sys_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ /* Minimum 3 MHz, VDW = 4 */
+ .vd_min = 3,
+ /* Maximum 50 MHz, VDW = 192 */
+ .vd_max = 50,
+ /* r is hardcoded to 46 and this is the actual divisor, +2 */
+ .rd_min = 48,
+ .rd_max = 48,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct icst_params icst525_ap_pci_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ /* Minimum 25 MHz */
+ .vd_min = 25,
+ /* Maximum 33 MHz */
+ .vd_max = 33,
+ /* r is hardcoded to 14 or 22 and this is the actual divisors +2 */
+ .rd_min = 16,
+ .rd_max = 24,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static void __init of_syscon_icst_setup(struct device_node *np)
+{
+ struct device_node *parent;
+ struct regmap *map;
+ struct clk_icst_desc icst_desc;
+ const char *name = np->name;
+ const char *parent_name;
+ struct clk *regclk;
+ enum icst_control_type ctype;
+
+ /* We do not release this reference, we are using it perpetually */
+ parent = of_get_parent(np);
+ if (!parent) {
+ pr_err("no parent node for syscon ICST clock\n");
+ return;
+ }
+ map = syscon_node_to_regmap(parent);
+ if (IS_ERR(map)) {
+ pr_err("no regmap for syscon ICST clock parent\n");
+ return;
+ }
+
+ if (of_property_read_u32(np, "vco-offset", &icst_desc.vco_offset)) {
+ pr_err("no VCO register offset for ICST clock\n");
+ return;
+ }
+ if (of_property_read_u32(np, "lock-offset", &icst_desc.lock_offset)) {
+ pr_err("no lock register offset for ICST clock\n");
+ return;
+ }
+
+ if (of_device_is_compatible(np, "arm,syscon-icst525")) {
+ icst_desc.params = &icst525_params;
+ ctype = ICST_VERSATILE;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst307")) {
+ icst_desc.params = &icst307_params;
+ ctype = ICST_VERSATILE;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst525-integratorap-cm")) {
+ icst_desc.params = &icst525_apcp_cm_params;
+ ctype = ICST_INTEGRATOR_AP_CM;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst525-integratorap-sys")) {
+ icst_desc.params = &icst525_ap_sys_params;
+ ctype = ICST_INTEGRATOR_AP_SYS;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst525-integratorap-pci")) {
+ icst_desc.params = &icst525_ap_pci_params;
+ ctype = ICST_INTEGRATOR_AP_PCI;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst525-integratorcp-cm-core")) {
+ icst_desc.params = &icst525_apcp_cm_params;
+ ctype = ICST_INTEGRATOR_CP_CM_CORE;
+ } else if (of_device_is_compatible(np, "arm,syscon-icst525-integratorcp-cm-mem")) {
+ icst_desc.params = &icst525_apcp_cm_params;
+ ctype = ICST_INTEGRATOR_CP_CM_MEM;
+ } else {
+ pr_err("unknown ICST clock %s\n", name);
+ return;
+ }
+
+ /* Parent clock name is not the same as node parent */
+ parent_name = of_clk_get_parent_name(np, 0);
+
+ regclk = icst_clk_setup(NULL, &icst_desc, name, parent_name, map, ctype);
+ if (IS_ERR(regclk)) {
+ pr_err("error setting up syscon ICST clock %s\n", name);
+ return;
+ }
+ of_clk_add_provider(np, of_clk_src_simple_get, regclk);
+ pr_debug("registered syscon ICST clock %s\n", name);
+}
+
+CLK_OF_DECLARE(arm_syscon_icst525_clk,
+ "arm,syscon-icst525", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_icst307_clk,
+ "arm,syscon-icst307", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_integratorap_cm_clk,
+ "arm,syscon-icst525-integratorap-cm", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_integratorap_sys_clk,
+ "arm,syscon-icst525-integratorap-sys", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_integratorap_pci_clk,
+ "arm,syscon-icst525-integratorap-pci", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_integratorcp_cm_core_clk,
+ "arm,syscon-icst525-integratorcp-cm-core", of_syscon_icst_setup);
+CLK_OF_DECLARE(arm_syscon_integratorcp_cm_mem_clk,
+ "arm,syscon-icst525-integratorcp-cm-mem", of_syscon_icst_setup);
+#endif
diff --git a/drivers/clk/versatile/clk-icst.h b/drivers/clk/versatile/clk-icst.h
new file mode 100644
index 0000000..e36ca1a
--- /dev/null
+++ b/drivers/clk/versatile/clk-icst.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/**
+ * struct clk_icst_desc - descriptor for the ICST VCO
+ * @params: ICST parameters
+ * @vco_offset: offset to the ICST VCO from the provided memory base
+ * @lock_offset: offset to the ICST VCO locking register from the provided
+ * memory base
+ */
+struct clk_icst_desc {
+ const struct icst_params *params;
+ u32 vco_offset;
+ u32 lock_offset;
+};
+
+struct clk *icst_clk_register(struct device *dev,
+ const struct clk_icst_desc *desc,
+ const char *name,
+ const char *parent_name,
+ void __iomem *base);
diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
new file mode 100644
index 0000000..401558b
--- /dev/null
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -0,0 +1,180 @@
+/*
+ * Clock driver for the ARM Integrator/IM-PD1 board
+ * Copyright (C) 2012-2013 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_data/clk-integrator.h>
+
+#include "icst.h"
+#include "clk-icst.h"
+
+#define IMPD1_OSC1 0x00
+#define IMPD1_OSC2 0x04
+#define IMPD1_LOCK 0x08
+
+struct impd1_clk {
+ char *pclkname;
+ struct clk *pclk;
+ char *vco1name;
+ struct clk *vco1clk;
+ char *vco2name;
+ struct clk *vco2clk;
+ struct clk *mmciclk;
+ char *uartname;
+ struct clk *uartclk;
+ char *spiname;
+ struct clk *spiclk;
+ char *scname;
+ struct clk *scclk;
+ struct clk_lookup *clks[15];
+};
+
+/* One entry for each connected IM-PD1 LM */
+static struct impd1_clk impd1_clks[4];
+
+/*
+ * There are two VCO's on the IM-PD1
+ */
+
+static const struct icst_params impd1_vco1_params = {
+ .ref = 24000000, /* 24 MHz */
+ .vco_max = ICST525_VCO_MAX_3V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 12,
+ .vd_max = 519,
+ .rd_min = 3,
+ .rd_max = 120,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct clk_icst_desc impd1_icst1_desc = {
+ .params = &impd1_vco1_params,
+ .vco_offset = IMPD1_OSC1,
+ .lock_offset = IMPD1_LOCK,
+};
+
+static const struct icst_params impd1_vco2_params = {
+ .ref = 24000000, /* 24 MHz */
+ .vco_max = ICST525_VCO_MAX_3V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 12,
+ .vd_max = 519,
+ .rd_min = 3,
+ .rd_max = 120,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct clk_icst_desc impd1_icst2_desc = {
+ .params = &impd1_vco2_params,
+ .vco_offset = IMPD1_OSC2,
+ .lock_offset = IMPD1_LOCK,
+};
+
+/**
+ * integrator_impd1_clk_init() - set up the integrator clock tree
+ * @base: base address of the logic module (LM)
+ * @id: the ID of this LM
+ */
+void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
+{
+ struct impd1_clk *imc;
+ struct clk *clk;
+ struct clk *pclk;
+ int i;
+
+ if (id > 3) {
+ pr_crit("no more than 4 LMs can be attached\n");
+ return;
+ }
+ imc = &impd1_clks[id];
+
+ /* Register the fixed rate PCLK */
+ imc->pclkname = kasprintf(GFP_KERNEL, "lm%x-pclk", id);
+ pclk = clk_register_fixed_rate(NULL, imc->pclkname, NULL, 0, 0);
+ imc->pclk = pclk;
+
+ imc->vco1name = kasprintf(GFP_KERNEL, "lm%x-vco1", id);
+ clk = icst_clk_register(NULL, &impd1_icst1_desc, imc->vco1name, NULL,
+ base);
+ imc->vco1clk = clk;
+ imc->clks[0] = clkdev_alloc(pclk, "apb_pclk", "lm%x:01000", id);
+ imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
+
+ /* VCO2 is also called "CLK2" */
+ imc->vco2name = kasprintf(GFP_KERNEL, "lm%x-vco2", id);
+ clk = icst_clk_register(NULL, &impd1_icst2_desc, imc->vco2name, NULL,
+ base);
+ imc->vco2clk = clk;
+
+ /* MMCI uses CLK2 right off */
+ imc->clks[2] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00700", id);
+ imc->clks[3] = clkdev_alloc(clk, NULL, "lm%x:00700", id);
+
+ /* UART reference clock divides CLK2 by a fixed factor 4 */
+ imc->uartname = kasprintf(GFP_KERNEL, "lm%x-uartclk", id);
+ clk = clk_register_fixed_factor(NULL, imc->uartname, imc->vco2name,
+ CLK_IGNORE_UNUSED, 1, 4);
+ imc->uartclk = clk;
+ imc->clks[4] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00100", id);
+ imc->clks[5] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
+ imc->clks[6] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00200", id);
+ imc->clks[7] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
+
+ /* SPI PL022 clock divides CLK2 by a fixed factor 64 */
+ imc->spiname = kasprintf(GFP_KERNEL, "lm%x-spiclk", id);
+ clk = clk_register_fixed_factor(NULL, imc->spiname, imc->vco2name,
+ CLK_IGNORE_UNUSED, 1, 64);
+ imc->clks[8] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00300", id);
+ imc->clks[9] = clkdev_alloc(clk, NULL, "lm%x:00300", id);
+
+ /* The GPIO blocks and AACI have only PCLK */
+ imc->clks[10] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00400", id);
+ imc->clks[11] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00500", id);
+ imc->clks[12] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00800", id);
+
+ /* Smart Card clock divides CLK2 by a fixed factor 4 */
+ imc->scname = kasprintf(GFP_KERNEL, "lm%x-scclk", id);
+ clk = clk_register_fixed_factor(NULL, imc->scname, imc->vco2name,
+ CLK_IGNORE_UNUSED, 1, 4);
+ imc->scclk = clk;
+ imc->clks[13] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00600", id);
+ imc->clks[14] = clkdev_alloc(clk, NULL, "lm%x:00600", id);
+
+ for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+ clkdev_add(imc->clks[i]);
+}
+EXPORT_SYMBOL_GPL(integrator_impd1_clk_init);
+
+void integrator_impd1_clk_exit(unsigned int id)
+{
+ int i;
+ struct impd1_clk *imc;
+
+ if (id > 3)
+ return;
+ imc = &impd1_clks[id];
+
+ for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+ clkdev_drop(imc->clks[i]);
+ clk_unregister(imc->spiclk);
+ clk_unregister(imc->uartclk);
+ clk_unregister(imc->vco2clk);
+ clk_unregister(imc->vco1clk);
+ clk_unregister(imc->pclk);
+ kfree(imc->scname);
+ kfree(imc->spiname);
+ kfree(imc->uartname);
+ kfree(imc->vco2name);
+ kfree(imc->vco1name);
+ kfree(imc->pclkname);
+}
+EXPORT_SYMBOL_GPL(integrator_impd1_clk_exit);
diff --git a/drivers/clk/versatile/clk-sp810.c b/drivers/clk/versatile/clk-sp810.c
new file mode 100644
index 0000000..1fe1e8d
--- /dev/null
+++ b/drivers/clk/versatile/clk-sp810.c
@@ -0,0 +1,144 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * Copyright (C) 2013 ARM Limited
+ */
+
+#include <linux/amba/sp810.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#define to_clk_sp810_timerclken(_hw) \
+ container_of(_hw, struct clk_sp810_timerclken, hw)
+
+struct clk_sp810;
+
+struct clk_sp810_timerclken {
+ struct clk_hw hw;
+ struct clk *clk;
+ struct clk_sp810 *sp810;
+ int channel;
+};
+
+struct clk_sp810 {
+ struct device_node *node;
+ void __iomem *base;
+ spinlock_t lock;
+ struct clk_sp810_timerclken timerclken[4];
+};
+
+static u8 clk_sp810_timerclken_get_parent(struct clk_hw *hw)
+{
+ struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw);
+ u32 val = readl(timerclken->sp810->base + SCCTRL);
+
+ return !!(val & (1 << SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel)));
+}
+
+static int clk_sp810_timerclken_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw);
+ struct clk_sp810 *sp810 = timerclken->sp810;
+ u32 val, shift = SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel);
+ unsigned long flags = 0;
+
+ if (WARN_ON(index > 1))
+ return -EINVAL;
+
+ spin_lock_irqsave(&sp810->lock, flags);
+
+ val = readl(sp810->base + SCCTRL);
+ val &= ~(1 << shift);
+ val |= index << shift;
+ writel(val, sp810->base + SCCTRL);
+
+ spin_unlock_irqrestore(&sp810->lock, flags);
+
+ return 0;
+}
+
+static const struct clk_ops clk_sp810_timerclken_ops = {
+ .get_parent = clk_sp810_timerclken_get_parent,
+ .set_parent = clk_sp810_timerclken_set_parent,
+};
+
+static struct clk *clk_sp810_timerclken_of_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ struct clk_sp810 *sp810 = data;
+
+ if (WARN_ON(clkspec->args_count != 1 ||
+ clkspec->args[0] >= ARRAY_SIZE(sp810->timerclken)))
+ return NULL;
+
+ return sp810->timerclken[clkspec->args[0]].clk;
+}
+
+static void __init clk_sp810_of_setup(struct device_node *node)
+{
+ struct clk_sp810 *sp810 = kzalloc(sizeof(*sp810), GFP_KERNEL);
+ const char *parent_names[2];
+ int num = ARRAY_SIZE(parent_names);
+ char name[12];
+ struct clk_init_data init;
+ static int instance;
+ int i;
+ bool deprecated;
+
+ if (!sp810)
+ return;
+
+ if (of_clk_parent_fill(node, parent_names, num) != num) {
+ pr_warn("Failed to obtain parent clocks for SP810!\n");
+ kfree(sp810);
+ return;
+ }
+
+ sp810->node = node;
+ sp810->base = of_iomap(node, 0);
+ spin_lock_init(&sp810->lock);
+
+ init.name = name;
+ init.ops = &clk_sp810_timerclken_ops;
+ init.flags = CLK_IS_BASIC;
+ init.parent_names = parent_names;
+ init.num_parents = num;
+
+ deprecated = !of_find_property(node, "assigned-clock-parents", NULL);
+
+ for (i = 0; i < ARRAY_SIZE(sp810->timerclken); i++) {
+ snprintf(name, sizeof(name), "sp810_%d_%d", instance, i);
+
+ sp810->timerclken[i].sp810 = sp810;
+ sp810->timerclken[i].channel = i;
+ sp810->timerclken[i].hw.init = &init;
+
+ /*
+ * If DT isn't setting the parent, force it to be
+ * the 1 MHz clock without going through the framework.
+ * We do this before clk_register() so that it can determine
+ * the parent and setup the tree properly.
+ */
+ if (deprecated)
+ init.ops->set_parent(&sp810->timerclken[i].hw, 1);
+
+ sp810->timerclken[i].clk = clk_register(NULL,
+ &sp810->timerclken[i].hw);
+ WARN_ON(IS_ERR(sp810->timerclken[i].clk));
+ }
+
+ of_clk_add_provider(node, clk_sp810_timerclken_of_get, sp810);
+ instance++;
+}
+CLK_OF_DECLARE(sp810, "arm,sp810", clk_sp810_of_setup);
diff --git a/drivers/clk/versatile/clk-versatile.c b/drivers/clk/versatile/clk-versatile.c
new file mode 100644
index 0000000..d6960de
--- /dev/null
+++ b/drivers/clk/versatile/clk-versatile.c
@@ -0,0 +1,100 @@
+/*
+ * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and
+ * Versatile PB boards.
+ * Copyright (C) 2012 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "icst.h"
+#include "clk-icst.h"
+
+#define INTEGRATOR_HDR_LOCK_OFFSET 0x14
+
+#define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c
+#define VERSATILE_SYS_LOCK_OFFSET 0x20
+
+/* Base offset for the core module */
+static void __iomem *cm_base;
+
+static const struct icst_params cp_auxosc_params = {
+ .vco_max = ICST525_VCO_MAX_5V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 8,
+ .vd_max = 263,
+ .rd_min = 3,
+ .rd_max = 65,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct clk_icst_desc cm_auxosc_desc __initconst = {
+ .params = &cp_auxosc_params,
+ .vco_offset = 0x1c,
+ .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,
+};
+
+static const struct icst_params versatile_auxosc_params = {
+ .vco_max = ICST307_VCO_MAX,
+ .vco_min = ICST307_VCO_MIN,
+ .vd_min = 4 + 8,
+ .vd_max = 511 + 8,
+ .rd_min = 1 + 2,
+ .rd_max = 127 + 2,
+ .s2div = icst307_s2div,
+ .idx2s = icst307_idx2s,
+};
+
+static const struct clk_icst_desc versatile_auxosc_desc __initconst = {
+ .params = &versatile_auxosc_params,
+ .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET,
+ .lock_offset = VERSATILE_SYS_LOCK_OFFSET,
+};
+static void __init cm_osc_setup(struct device_node *np,
+ const struct clk_icst_desc *desc)
+{
+ struct clk *clk = ERR_PTR(-EINVAL);
+ const char *clk_name = np->name;
+ const char *parent_name;
+
+ if (!cm_base) {
+ /* Remap the core module base if not done yet */
+ struct device_node *parent;
+
+ parent = of_get_parent(np);
+ if (!parent) {
+ pr_err("no parent on core module clock\n");
+ return;
+ }
+ cm_base = of_iomap(parent, 0);
+ if (!cm_base) {
+ pr_err("could not remap core module base\n");
+ return;
+ }
+ }
+
+ parent_name = of_clk_get_parent_name(np, 0);
+ clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base);
+ if (!IS_ERR(clk))
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
+}
+
+static void __init of_integrator_cm_osc_setup(struct device_node *np)
+{
+ cm_osc_setup(np, &cm_auxosc_desc);
+}
+CLK_OF_DECLARE(integrator_cm_auxosc_clk,
+ "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);
+
+static void __init of_versatile_cm_osc_setup(struct device_node *np)
+{
+ cm_osc_setup(np, &versatile_auxosc_desc);
+}
+CLK_OF_DECLARE(versatile_cm_auxosc_clk,
+ "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup);
diff --git a/drivers/clk/versatile/clk-vexpress-osc.c b/drivers/clk/versatile/clk-vexpress-osc.c
new file mode 100644
index 0000000..dd08ecb
--- /dev/null
+++ b/drivers/clk/versatile/clk-vexpress-osc.c
@@ -0,0 +1,131 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * Copyright (C) 2012 ARM Limited
+ */
+
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/vexpress.h>
+
+struct vexpress_osc {
+ struct regmap *reg;
+ struct clk_hw hw;
+ unsigned long rate_min;
+ unsigned long rate_max;
+};
+
+#define to_vexpress_osc(osc) container_of(osc, struct vexpress_osc, hw)
+
+static unsigned long vexpress_osc_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct vexpress_osc *osc = to_vexpress_osc(hw);
+ u32 rate;
+
+ regmap_read(osc->reg, 0, &rate);
+
+ return rate;
+}
+
+static long vexpress_osc_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct vexpress_osc *osc = to_vexpress_osc(hw);
+
+ if (osc->rate_min && rate < osc->rate_min)
+ rate = osc->rate_min;
+
+ if (osc->rate_max && rate > osc->rate_max)
+ rate = osc->rate_max;
+
+ return rate;
+}
+
+static int vexpress_osc_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct vexpress_osc *osc = to_vexpress_osc(hw);
+
+ return regmap_write(osc->reg, 0, rate);
+}
+
+static const struct clk_ops vexpress_osc_ops = {
+ .recalc_rate = vexpress_osc_recalc_rate,
+ .round_rate = vexpress_osc_round_rate,
+ .set_rate = vexpress_osc_set_rate,
+};
+
+
+static int vexpress_osc_probe(struct platform_device *pdev)
+{
+ struct clk_init_data init;
+ struct vexpress_osc *osc;
+ struct clk *clk;
+ u32 range[2];
+
+ osc = devm_kzalloc(&pdev->dev, sizeof(*osc), GFP_KERNEL);
+ if (!osc)
+ return -ENOMEM;
+
+ osc->reg = devm_regmap_init_vexpress_config(&pdev->dev);
+ if (IS_ERR(osc->reg))
+ return PTR_ERR(osc->reg);
+
+ if (of_property_read_u32_array(pdev->dev.of_node, "freq-range", range,
+ ARRAY_SIZE(range)) == 0) {
+ osc->rate_min = range[0];
+ osc->rate_max = range[1];
+ }
+
+ if (of_property_read_string(pdev->dev.of_node, "clock-output-names",
+ &init.name) != 0)
+ init.name = dev_name(&pdev->dev);
+
+ init.ops = &vexpress_osc_ops;
+ init.flags = 0;
+ init.num_parents = 0;
+
+ osc->hw.init = &init;
+
+ clk = clk_register(NULL, &osc->hw);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ of_clk_add_provider(pdev->dev.of_node, of_clk_src_simple_get, clk);
+ clk_hw_set_rate_range(&osc->hw, osc->rate_min, osc->rate_max);
+
+ dev_dbg(&pdev->dev, "Registered clock '%s'\n", init.name);
+
+ return 0;
+}
+
+static const struct of_device_id vexpress_osc_of_match[] = {
+ { .compatible = "arm,vexpress-osc", },
+ {}
+};
+
+static struct platform_driver vexpress_osc_driver = {
+ .driver = {
+ .name = "vexpress-osc",
+ .of_match_table = vexpress_osc_of_match,
+ },
+ .probe = vexpress_osc_probe,
+};
+
+static int __init vexpress_osc_init(void)
+{
+ return platform_driver_register(&vexpress_osc_driver);
+}
+core_initcall(vexpress_osc_init);
diff --git a/drivers/clk/versatile/icst.c b/drivers/clk/versatile/icst.c
new file mode 100644
index 0000000..de2af63
--- /dev/null
+++ b/drivers/clk/versatile/icst.c
@@ -0,0 +1,105 @@
+/*
+ * linux/arch/arm/common/icst307.c
+ *
+ * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Support functions for calculating clocks/divisors for the ICST307
+ * clock generators. See http://www.idt.com/ for more information
+ * on these devices.
+ *
+ * This is an almost identical implementation to the ICST525 clock generator.
+ * The s2div and idx2s files are different
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <asm/div64.h>
+#include "icst.h"
+
+/*
+ * Divisors for each OD setting.
+ */
+const unsigned char icst307_s2div[8] = { 10, 2, 8, 4, 5, 7, 3, 6 };
+const unsigned char icst525_s2div[8] = { 10, 2, 8, 4, 5, 7, 9, 6 };
+EXPORT_SYMBOL(icst307_s2div);
+EXPORT_SYMBOL(icst525_s2div);
+
+unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco)
+{
+ u64 dividend = p->ref * 2 * (u64)(vco.v + 8);
+ u32 divisor = (vco.r + 2) * p->s2div[vco.s];
+
+ do_div(dividend, divisor);
+ return (unsigned long)dividend;
+}
+
+EXPORT_SYMBOL(icst_hz);
+
+/*
+ * Ascending divisor S values.
+ */
+const unsigned char icst307_idx2s[8] = { 1, 6, 3, 4, 7, 5, 2, 0 };
+const unsigned char icst525_idx2s[8] = { 1, 3, 4, 7, 5, 2, 6, 0 };
+EXPORT_SYMBOL(icst307_idx2s);
+EXPORT_SYMBOL(icst525_idx2s);
+
+struct icst_vco
+icst_hz_to_vco(const struct icst_params *p, unsigned long freq)
+{
+ struct icst_vco vco = { .s = 1, .v = p->vd_max, .r = p->rd_max };
+ unsigned long f;
+ unsigned int i = 0, rd, best = (unsigned int)-1;
+
+ /*
+ * First, find the PLL output divisor such
+ * that the PLL output is within spec.
+ */
+ do {
+ f = freq * p->s2div[p->idx2s[i]];
+
+ if (f > p->vco_min && f <= p->vco_max)
+ break;
+ i++;
+ } while (i < 8);
+
+ if (i >= 8)
+ return vco;
+
+ vco.s = p->idx2s[i];
+
+ /*
+ * Now find the closest divisor combination
+ * which gives a PLL output of 'f'.
+ */
+ for (rd = p->rd_min; rd <= p->rd_max; rd++) {
+ unsigned long fref_div, f_pll;
+ unsigned int vd;
+ int f_diff;
+
+ fref_div = (2 * p->ref) / rd;
+
+ vd = (f + fref_div / 2) / fref_div;
+ if (vd < p->vd_min || vd > p->vd_max)
+ continue;
+
+ f_pll = fref_div * vd;
+ f_diff = f_pll - f;
+ if (f_diff < 0)
+ f_diff = -f_diff;
+
+ if ((unsigned)f_diff < best) {
+ vco.v = vd - 8;
+ vco.r = rd - 2;
+ if (f_diff == 0)
+ break;
+ best = f_diff;
+ }
+ }
+
+ return vco;
+}
+
+EXPORT_SYMBOL(icst_hz_to_vco);
diff --git a/drivers/clk/versatile/icst.h b/drivers/clk/versatile/icst.h
new file mode 100644
index 0000000..7519bba
--- /dev/null
+++ b/drivers/clk/versatile/icst.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Support functions for calculating clocks/divisors for the ICST
+ * clock generators. See http://www.idt.com/ for more information
+ * on these devices.
+ */
+#ifndef ICST_H
+#define ICST_H
+
+struct icst_params {
+ unsigned long ref;
+ unsigned long vco_max; /* inclusive */
+ unsigned long vco_min; /* exclusive */
+ unsigned short vd_min; /* inclusive */
+ unsigned short vd_max; /* inclusive */
+ unsigned char rd_min; /* inclusive */
+ unsigned char rd_max; /* inclusive */
+ const unsigned char *s2div; /* chip specific s2div array */
+ const unsigned char *idx2s; /* chip specific idx2s array */
+};
+
+struct icst_vco {
+ unsigned short v;
+ unsigned char r;
+ unsigned char s;
+};
+
+unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
+struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
+
+/*
+ * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
+ * This frequency is pre-output divider.
+ */
+#define ICST307_VCO_MIN 6000000
+#define ICST307_VCO_MAX 200000000
+
+extern const unsigned char icst307_s2div[];
+extern const unsigned char icst307_idx2s[];
+
+/*
+ * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
+ * This frequency is pre-output divider.
+ */
+#define ICST525_VCO_MIN 10000000
+#define ICST525_VCO_MAX_3V 200000000
+#define ICST525_VCO_MAX_5V 320000000
+
+extern const unsigned char icst525_s2div[];
+extern const unsigned char icst525_idx2s[];
+
+#endif