drivers/clk/berlin/bg2q.c - arm/linux-arm64-legacy - Git at Google

 /*
  * Copyright (c) 2014 Marvell Technology Group Ltd.
  *
  * Alexandre Belloni <alexandre.belloni@free-electrons.com>
  * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope 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.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */

 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/slab.h>

 #include <dt-bindings/clock/berlin2q.h>

 #include "berlin2-div.h"
 #include "berlin2-pll.h"
 #include "common.h"

 #define REG_PINMUX0		0x0018
 #define REG_PINMUX5		0x002c
 #define REG_SYSPLLCTL0		0x0030
 #define REG_SYSPLLCTL4		0x0040
 #define REG_CLKENABLE		0x00e8
 #define REG_CLKSELECT0		0x00ec
 #define REG_CLKSELECT1		0x00f0
 #define REG_CLKSELECT2		0x00f4
 #define REG_CLKSWITCH0		0x00f8
 #define REG_CLKSWITCH1		0x00fc
 #define REG_SW_GENERIC0		0x0110
 #define REG_SW_GENERIC3		0x011c
 #define REG_SDIO0XIN_CLKCTL	0x0158
 #define REG_SDIO1XIN_CLKCTL	0x015c

 #define	MAX_CLKS 27
 static struct clk *clks[MAX_CLKS];
 static struct clk_onecell_data clk_data;
 static DEFINE_SPINLOCK(lock);
 static void __iomem *gbase;
 static void __iomem *cpupll_base;

 enum {
 	REFCLK,
 	SYSPLL, CPUPLL,
 	AVPLL_B1, AVPLL_B2, AVPLL_B3, AVPLL_B4,
 	AVPLL_B5, AVPLL_B6, AVPLL_B7, AVPLL_B8,
 };

 static const char *clk_names[] = {
 	[REFCLK]		= "refclk",
 	[SYSPLL]		= "syspll",
 	[CPUPLL]		= "cpupll",
 	[AVPLL_B1]		= "avpll_b1",
 	[AVPLL_B2]		= "avpll_b2",
 	[AVPLL_B3]		= "avpll_b3",
 	[AVPLL_B4]		= "avpll_b4",
 	[AVPLL_B5]		= "avpll_b5",
 	[AVPLL_B6]		= "avpll_b6",
 	[AVPLL_B7]		= "avpll_b7",
 	[AVPLL_B8]		= "avpll_b8",
 };

 static const struct berlin2_pll_map bg2q_pll_map __initconst = {
 	.vcodiv		= {1, 0, 2, 0, 3, 4, 0, 6, 8},
 	.mult		= 1,
 	.fbdiv_shift	= 7,
 	.rfdiv_shift	= 2,
 	.divsel_shift	= 9,
 };

 static const u8 default_parent_ids[] = {
 	SYSPLL, AVPLL_B4, AVPLL_B5, AVPLL_B6, AVPLL_B7, SYSPLL
 };

 static const struct berlin2_div_data bg2q_divs[] __initconst = {
 	{
 		.name = "sys",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = CLK_IGNORE_UNUSED,
 	},
 	{
 		.name = "drmfigo",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "cfg",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "gfx2d",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "zsp",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "perif",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = CLK_IGNORE_UNUSED,
 	},
 	{
 		.name = "pcube",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "vscope",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "nfc_ecc",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "vpp",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "app",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
 			BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
 			BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
 			BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
 			BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
 			BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "sdio0xin",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_SINGLE_DIV(REG_SDIO0XIN_CLKCTL),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 	{
 		.name = "sdio1xin",
 		.parent_ids = default_parent_ids,
 		.num_parents = ARRAY_SIZE(default_parent_ids),
 		.map = {
 			BERLIN2_SINGLE_DIV(REG_SDIO1XIN_CLKCTL),
 		},
 		.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
 		.flags = 0,
 	},
 };

 static const struct berlin2_gate_data bg2q_gates[] __initconst = {
 	{ "gfx2daxi",	"perif",	5 },
 	{ "geth0",	"perif",	8 },
 	{ "sata",	"perif",	9 },
 	{ "ahbapb",	"perif",	10, CLK_IGNORE_UNUSED },
 	{ "usb0",	"perif",	11 },
 	{ "usb1",	"perif",	12 },
 	{ "usb2",	"perif",	13 },
 	{ "usb3",	"perif",	14 },
 	{ "pbridge",	"perif",	15, CLK_IGNORE_UNUSED },
 	{ "sdio",	"perif",	16, CLK_IGNORE_UNUSED },
 	{ "nfc",	"perif",	18 },
 	{ "smemc",	"perif",	19 },
 	{ "pcie",	"perif",	22 },
 };

 static void __init berlin2q_clock_setup(struct device_node *np)
 {
 	const char *parent_names[9];
 	struct clk *clk;
 	int n;

 	gbase = of_iomap(np, 0);
 	if (!gbase) {
 		pr_err("%s: Unable to map global base\n", np->full_name);
 		return;
 	}

 	/* BG2Q CPU PLL is not part of global registers */
 	cpupll_base = of_iomap(np, 1);
 	if (!cpupll_base) {
 		pr_err("%s: Unable to map cpupll base\n", np->full_name);
 		iounmap(gbase);
 		return;
 	}

 	/* overwrite default clock names with DT provided ones */
 	clk = of_clk_get_by_name(np, clk_names[REFCLK]);
 	if (!IS_ERR(clk)) {
 		clk_names[REFCLK] = __clk_get_name(clk);
 		clk_put(clk);
 	}

 	/* simple register PLLs */
 	clk = berlin2_pll_register(&bg2q_pll_map, gbase + REG_SYSPLLCTL0,
 				   clk_names[SYSPLL], clk_names[REFCLK], 0);
 	if (IS_ERR(clk))
 		goto bg2q_fail;

 	clk = berlin2_pll_register(&bg2q_pll_map, cpupll_base,
 				   clk_names[CPUPLL], clk_names[REFCLK], 0);
 	if (IS_ERR(clk))
 		goto bg2q_fail;

 	/* TODO: add BG2Q AVPLL */

 	/*
 	 * TODO: add reference clock bypass switches:
 	 * memPLLSWBypass, cpuPLLSWBypass, and sysPLLSWBypass
 	 */

 	/* clock divider cells */
 	for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
 		const struct berlin2_div_data *dd = &bg2q_divs[n];
 		int k;

 		for (k = 0; k < dd->num_parents; k++)
 			parent_names[k] = clk_names[dd->parent_ids[k]];

 		clks[CLKID_SYS + n] = berlin2_div_register(&dd->map, gbase,
 				dd->name, dd->div_flags, parent_names,
 				dd->num_parents, dd->flags, &lock);
 	}

 	/* clock gate cells */
 	for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
 		const struct berlin2_gate_data *gd = &bg2q_gates[n];

 		clks[CLKID_GFX2DAXI + n] = clk_register_gate(NULL, gd->name,
 			    gd->parent_name, gd->flags, gbase + REG_CLKENABLE,
 			    gd->bit_idx, 0, &lock);
 	}

 	/*
 	 * twdclk is derived from cpu/3
 	 * TODO: use cpupll until cpuclk is not available
 	 */
 	clks[CLKID_TWD] =
 		clk_register_fixed_factor(NULL, "twd", clk_names[CPUPLL],
 					  0, 1, 3);

 	/* check for errors on leaf clocks */
 	for (n = 0; n < MAX_CLKS; n++) {
 		if (!IS_ERR(clks[n]))
 			continue;

 		pr_err("%s: Unable to register leaf clock %d\n",
 		       np->full_name, n);
 		goto bg2q_fail;
 	}

 	/* register clk-provider */
 	clk_data.clks = clks;
 	clk_data.clk_num = MAX_CLKS;
 	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);

 	return;

 bg2q_fail:
 	iounmap(cpupll_base);
 	iounmap(gbase);
 }
 CLK_OF_DECLARE(berlin2q_clock, "marvell,berlin2q-chip-ctrl",
 	       berlin2q_clock_setup);
	/*
	* Copyright (c) 2014 Marvell Technology Group Ltd.
	*
	* Alexandre Belloni <alexandre.belloni@free-electrons.com>
	* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope 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.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include <linux/clk.h>
	#include <linux/clk-provider.h>
	#include <linux/kernel.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/slab.h>

	#include <dt-bindings/clock/berlin2q.h>

	#include "berlin2-div.h"
	#include "berlin2-pll.h"
	#include "common.h"

	#define REG_PINMUX0 0x0018
	#define REG_PINMUX5 0x002c
	#define REG_SYSPLLCTL0 0x0030
	#define REG_SYSPLLCTL4 0x0040
	#define REG_CLKENABLE 0x00e8
	#define REG_CLKSELECT0 0x00ec
	#define REG_CLKSELECT1 0x00f0
	#define REG_CLKSELECT2 0x00f4
	#define REG_CLKSWITCH0 0x00f8
	#define REG_CLKSWITCH1 0x00fc
	#define REG_SW_GENERIC0 0x0110
	#define REG_SW_GENERIC3 0x011c
	#define REG_SDIO0XIN_CLKCTL 0x0158
	#define REG_SDIO1XIN_CLKCTL 0x015c

	#define MAX_CLKS 27
	static struct clk *clks[MAX_CLKS];
	static struct clk_onecell_data clk_data;
	static DEFINE_SPINLOCK(lock);
	static void __iomem *gbase;
	static void __iomem *cpupll_base;

	enum {
	REFCLK,
	SYSPLL, CPUPLL,
	AVPLL_B1, AVPLL_B2, AVPLL_B3, AVPLL_B4,
	AVPLL_B5, AVPLL_B6, AVPLL_B7, AVPLL_B8,
	};

	static const char *clk_names[] = {
	[REFCLK] = "refclk",
	[SYSPLL] = "syspll",
	[CPUPLL] = "cpupll",
	[AVPLL_B1] = "avpll_b1",
	[AVPLL_B2] = "avpll_b2",
	[AVPLL_B3] = "avpll_b3",
	[AVPLL_B4] = "avpll_b4",
	[AVPLL_B5] = "avpll_b5",
	[AVPLL_B6] = "avpll_b6",
	[AVPLL_B7] = "avpll_b7",
	[AVPLL_B8] = "avpll_b8",
	};

	static const struct berlin2_pll_map bg2q_pll_map __initconst = {
	.vcodiv = {1, 0, 2, 0, 3, 4, 0, 6, 8},
	.mult = 1,
	.fbdiv_shift = 7,
	.rfdiv_shift = 2,
	.divsel_shift = 9,
	};

	static const u8 default_parent_ids[] = {
	SYSPLL, AVPLL_B4, AVPLL_B5, AVPLL_B6, AVPLL_B7, SYSPLL
	};

	static const struct berlin2_div_data bg2q_divs[] __initconst = {
	{
	.name = "sys",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
	BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
	BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = CLK_IGNORE_UNUSED,
	},
	{
	.name = "drmfigo",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
	BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
	BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "cfg",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
	BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
	BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "gfx2d",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
	BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
	BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "zsp",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
	BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
	BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "perif",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
	BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
	BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = CLK_IGNORE_UNUSED,
	},
	{
	.name = "pcube",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
	BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
	BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "vscope",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
	BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
	BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "nfc_ecc",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
	BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
	BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "vpp",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
	BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
	BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "app",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
	BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
	BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
	BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
	BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
	BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "sdio0xin",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_SINGLE_DIV(REG_SDIO0XIN_CLKCTL),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	{
	.name = "sdio1xin",
	.parent_ids = default_parent_ids,
	.num_parents = ARRAY_SIZE(default_parent_ids),
	.map = {
	BERLIN2_SINGLE_DIV(REG_SDIO1XIN_CLKCTL),
	},
	.div_flags = BERLIN2_DIV_HAS_GATE \| BERLIN2_DIV_HAS_MUX,
	.flags = 0,
	},
	};

	static const struct berlin2_gate_data bg2q_gates[] __initconst = {
	{ "gfx2daxi", "perif", 5 },
	{ "geth0", "perif", 8 },
	{ "sata", "perif", 9 },
	{ "ahbapb", "perif", 10, CLK_IGNORE_UNUSED },
	{ "usb0", "perif", 11 },
	{ "usb1", "perif", 12 },
	{ "usb2", "perif", 13 },
	{ "usb3", "perif", 14 },
	{ "pbridge", "perif", 15, CLK_IGNORE_UNUSED },
	{ "sdio", "perif", 16, CLK_IGNORE_UNUSED },
	{ "nfc", "perif", 18 },
	{ "smemc", "perif", 19 },
	{ "pcie", "perif", 22 },
	};

	static void __init berlin2q_clock_setup(struct device_node *np)
	{
	const char *parent_names[9];
	struct clk *clk;
	int n;

	gbase = of_iomap(np, 0);
	if (!gbase) {
	pr_err("%s: Unable to map global base\n", np->full_name);
	return;
	}

	/* BG2Q CPU PLL is not part of global registers */
	cpupll_base = of_iomap(np, 1);
	if (!cpupll_base) {
	pr_err("%s: Unable to map cpupll base\n", np->full_name);
	iounmap(gbase);
	return;
	}

	/* overwrite default clock names with DT provided ones */
	clk = of_clk_get_by_name(np, clk_names[REFCLK]);
	if (!IS_ERR(clk)) {
	clk_names[REFCLK] = __clk_get_name(clk);
	clk_put(clk);
	}

	/* simple register PLLs */
	clk = berlin2_pll_register(&bg2q_pll_map, gbase + REG_SYSPLLCTL0,
	clk_names[SYSPLL], clk_names[REFCLK], 0);
	if (IS_ERR(clk))
	goto bg2q_fail;

	clk = berlin2_pll_register(&bg2q_pll_map, cpupll_base,
	clk_names[CPUPLL], clk_names[REFCLK], 0);
	if (IS_ERR(clk))
	goto bg2q_fail;

	/* TODO: add BG2Q AVPLL */

	/*
	* TODO: add reference clock bypass switches:
	* memPLLSWBypass, cpuPLLSWBypass, and sysPLLSWBypass
	*/

	/* clock divider cells */
	for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
	const struct berlin2_div_data *dd = &bg2q_divs[n];
	int k;

	for (k = 0; k < dd->num_parents; k++)
	parent_names[k] = clk_names[dd->parent_ids[k]];

	clks[CLKID_SYS + n] = berlin2_div_register(&dd->map, gbase,
	dd->name, dd->div_flags, parent_names,
	dd->num_parents, dd->flags, &lock);
	}

	/* clock gate cells */
	for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
	const struct berlin2_gate_data *gd = &bg2q_gates[n];

	clks[CLKID_GFX2DAXI + n] = clk_register_gate(NULL, gd->name,
	gd->parent_name, gd->flags, gbase + REG_CLKENABLE,
	gd->bit_idx, 0, &lock);
	}

	/*
	* twdclk is derived from cpu/3
	* TODO: use cpupll until cpuclk is not available
	*/
	clks[CLKID_TWD] =
	clk_register_fixed_factor(NULL, "twd", clk_names[CPUPLL],
	0, 1, 3);

	/* check for errors on leaf clocks */
	for (n = 0; n < MAX_CLKS; n++) {
	if (!IS_ERR(clks[n]))
	continue;

	pr_err("%s: Unable to register leaf clock %d\n",
	np->full_name, n);
	goto bg2q_fail;
	}

	/* register clk-provider */
	clk_data.clks = clks;
	clk_data.clk_num = MAX_CLKS;
	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);

	return;

	bg2q_fail:
	iounmap(cpupll_base);
	iounmap(gbase);
	}
	CLK_OF_DECLARE(berlin2q_clock, "marvell,berlin2q-chip-ctrl",
	berlin2q_clock_setup);