clk-qoriq.c 28.5 KB
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/*
 * Copyright 2013 Freescale Semiconductor, Inc.
 *
 * 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.
 *
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 * clock driver for Freescale QorIQ SoCs.
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 */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/fsl/guts.h>
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#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
#include <linux/of.h>
#include <linux/slab.h>

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#define PLL_DIV1	0
#define PLL_DIV2	1
#define PLL_DIV3	2
#define PLL_DIV4	3

#define PLATFORM_PLL	0
#define CGA_PLL1	1
#define CGA_PLL2	2
#define CGA_PLL3	3
#define CGA_PLL4	4	/* only on clockgen-1.0, which lacks CGB */
#define CGB_PLL1	4
#define CGB_PLL2	5

struct clockgen_pll_div {
	struct clk *clk;
	char name[32];
};

struct clockgen_pll {
	struct clockgen_pll_div div[4];
};

#define CLKSEL_VALID	1
#define CLKSEL_80PCT	2	/* Only allowed if PLL <= 80% of max cpu freq */

struct clockgen_sourceinfo {
	u32 flags;	/* CLKSEL_xxx */
	int pll;	/* CGx_PLLn */
	int div;	/* PLL_DIVn */
};

#define NUM_MUX_PARENTS	16

struct clockgen_muxinfo {
	struct clockgen_sourceinfo clksel[NUM_MUX_PARENTS];
};

#define NUM_HWACCEL	5
#define NUM_CMUX	8

struct clockgen;

/*
 * cmux freq must be >= platform pll.
 * If not set, cmux freq must be >= platform pll/2
 */
#define CG_CMUX_GE_PLAT		1
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#define CG_PLL_8BIT		2	/* PLLCnGSR[CFG] is 8 bits, not 6 */
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#define CG_VER3			4	/* version 3 cg: reg layout different */
#define CG_LITTLE_ENDIAN	8
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struct clockgen_chipinfo {
	const char *compat, *guts_compat;
	const struct clockgen_muxinfo *cmux_groups[2];
	const struct clockgen_muxinfo *hwaccel[NUM_HWACCEL];
	void (*init_periph)(struct clockgen *cg);
	int cmux_to_group[NUM_CMUX]; /* -1 terminates if fewer than NUM_CMUX */
	u32 pll_mask;	/* 1 << n bit set if PLL n is valid */
	u32 flags;	/* CG_xxx */
};

struct clockgen {
	struct device_node *node;
	void __iomem *regs;
	struct clockgen_chipinfo info; /* mutable copy */
	struct clk *sysclk;
	struct clockgen_pll pll[6];
	struct clk *cmux[NUM_CMUX];
	struct clk *hwaccel[NUM_HWACCEL];
	struct clk *fman[2];
	struct ccsr_guts __iomem *guts;
};

static struct clockgen clockgen;

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static void cg_out(struct clockgen *cg, u32 val, u32 __iomem *reg)
{
	if (cg->info.flags & CG_LITTLE_ENDIAN)
		iowrite32(val, reg);
	else
		iowrite32be(val, reg);
}

static u32 cg_in(struct clockgen *cg, u32 __iomem *reg)
{
	u32 val;

	if (cg->info.flags & CG_LITTLE_ENDIAN)
		val = ioread32(reg);
	else
		val = ioread32be(reg);

	return val;
}

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static const struct clockgen_muxinfo p2041_cmux_grp1 = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
	}
};

static const struct clockgen_muxinfo p2041_cmux_grp2 = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
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		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
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	}
};

static const struct clockgen_muxinfo p5020_cmux_grp1 = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV1 },
	}
};

static const struct clockgen_muxinfo p5020_cmux_grp2 = {
	{
		[0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
	}
};

static const struct clockgen_muxinfo p5040_cmux_grp1 = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL2, PLL_DIV2 },
	}
};

static const struct clockgen_muxinfo p5040_cmux_grp2 = {
	{
		[0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
	}
};

static const struct clockgen_muxinfo p4080_cmux_grp1 = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		[8] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL3, PLL_DIV1 },
	}
};

static const struct clockgen_muxinfo p4080_cmux_grp2 = {
	{
		[0] = { CLKSEL_VALID | CLKSEL_80PCT, CGA_PLL1, PLL_DIV1 },
		[8] = { CLKSEL_VALID, CGA_PLL3, PLL_DIV1 },
		[9] = { CLKSEL_VALID, CGA_PLL3, PLL_DIV2 },
		[12] = { CLKSEL_VALID, CGA_PLL4, PLL_DIV1 },
		[13] = { CLKSEL_VALID, CGA_PLL4, PLL_DIV2 },
	}
};

static const struct clockgen_muxinfo t1023_cmux = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
	}
};

static const struct clockgen_muxinfo t1040_cmux = {
	{
		[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		[1] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		[4] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		[5] = { CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
	}
};


static const struct clockgen_muxinfo clockgen2_cmux_cga = {
	{
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
		{},
		{ CLKSEL_VALID, CGA_PLL3, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL3, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL3, PLL_DIV4 },
	},
};

static const struct clockgen_muxinfo clockgen2_cmux_cga12 = {
	{
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
	},
};

static const struct clockgen_muxinfo clockgen2_cmux_cgb = {
	{
		{ CLKSEL_VALID, CGB_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGB_PLL1, PLL_DIV4 },
		{},
		{ CLKSEL_VALID, CGB_PLL2, PLL_DIV1 },
		{ CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGB_PLL2, PLL_DIV4 },
	},
};

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static const struct clockgen_muxinfo ls1043a_hwa1 = {
	{
		{},
		{},
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
		{},
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
	},
};

static const struct clockgen_muxinfo ls1043a_hwa2 = {
	{
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
	},
};

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static const struct clockgen_muxinfo t1023_hwa1 = {
	{
		{},
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
	},
};

static const struct clockgen_muxinfo t1023_hwa2 = {
	{
		[6] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
	},
};

static const struct clockgen_muxinfo t2080_hwa1 = {
	{
		{},
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
		{ CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
	},
};

static const struct clockgen_muxinfo t2080_hwa2 = {
	{
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV4 },
		{ CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
	},
};

static const struct clockgen_muxinfo t4240_hwa1 = {
	{
		{ CLKSEL_VALID, PLATFORM_PLL, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV3 },
		{ CLKSEL_VALID, CGA_PLL1, PLL_DIV4 },
		{},
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV2 },
		{ CLKSEL_VALID, CGA_PLL2, PLL_DIV3 },
	},
};

static const struct clockgen_muxinfo t4240_hwa4 = {
	{
		[2] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
		[3] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV3 },
		[4] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV4 },
		[5] = { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
		[6] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
	},
};

static const struct clockgen_muxinfo t4240_hwa5 = {
	{
		[2] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV2 },
		[3] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV3 },
		[4] = { CLKSEL_VALID, CGB_PLL2, PLL_DIV4 },
		[5] = { CLKSEL_VALID, PLATFORM_PLL, PLL_DIV1 },
		[6] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV2 },
		[7] = { CLKSEL_VALID, CGB_PLL1, PLL_DIV3 },
	},
};

#define RCWSR7_FM1_CLK_SEL	0x40000000
#define RCWSR7_FM2_CLK_SEL	0x20000000
#define RCWSR7_HWA_ASYNC_DIV	0x04000000

static void __init p2041_init_periph(struct clockgen *cg)
{
	u32 reg;

	reg = ioread32be(&cg->guts->rcwsr[7]);

	if (reg & RCWSR7_FM1_CLK_SEL)
		cg->fman[0] = cg->pll[CGA_PLL2].div[PLL_DIV2].clk;
	else
		cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
}

static void __init p4080_init_periph(struct clockgen *cg)
{
	u32 reg;

	reg = ioread32be(&cg->guts->rcwsr[7]);

	if (reg & RCWSR7_FM1_CLK_SEL)
		cg->fman[0] = cg->pll[CGA_PLL3].div[PLL_DIV2].clk;
	else
		cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;

	if (reg & RCWSR7_FM2_CLK_SEL)
		cg->fman[1] = cg->pll[CGA_PLL3].div[PLL_DIV2].clk;
	else
		cg->fman[1] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
}

static void __init p5020_init_periph(struct clockgen *cg)
{
	u32 reg;
	int div = PLL_DIV2;

	reg = ioread32be(&cg->guts->rcwsr[7]);
	if (reg & RCWSR7_HWA_ASYNC_DIV)
		div = PLL_DIV4;

	if (reg & RCWSR7_FM1_CLK_SEL)
		cg->fman[0] = cg->pll[CGA_PLL2].div[div].clk;
	else
		cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
}

static void __init p5040_init_periph(struct clockgen *cg)
{
	u32 reg;
	int div = PLL_DIV2;

	reg = ioread32be(&cg->guts->rcwsr[7]);
	if (reg & RCWSR7_HWA_ASYNC_DIV)
		div = PLL_DIV4;

	if (reg & RCWSR7_FM1_CLK_SEL)
		cg->fman[0] = cg->pll[CGA_PLL3].div[div].clk;
	else
		cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;

	if (reg & RCWSR7_FM2_CLK_SEL)
		cg->fman[1] = cg->pll[CGA_PLL3].div[div].clk;
	else
		cg->fman[1] = cg->pll[PLATFORM_PLL].div[PLL_DIV2].clk;
}

static void __init t1023_init_periph(struct clockgen *cg)
{
	cg->fman[0] = cg->hwaccel[1];
}

static void __init t1040_init_periph(struct clockgen *cg)
{
	cg->fman[0] = cg->pll[PLATFORM_PLL].div[PLL_DIV1].clk;
}

static void __init t2080_init_periph(struct clockgen *cg)
{
	cg->fman[0] = cg->hwaccel[0];
}

static void __init t4240_init_periph(struct clockgen *cg)
{
	cg->fman[0] = cg->hwaccel[3];
	cg->fman[1] = cg->hwaccel[4];
}

static const struct clockgen_chipinfo chipinfo[] = {
	{
		.compat = "fsl,b4420-clockgen",
		.guts_compat = "fsl,b4860-device-config",
		.init_periph = t2080_init_periph,
		.cmux_groups = {
			&clockgen2_cmux_cga12, &clockgen2_cmux_cgb
		},
		.hwaccel = {
			&t2080_hwa1
		},
		.cmux_to_group = {
			0, 1, 1, 1, -1
		},
		.pll_mask = 0x3f,
		.flags = CG_PLL_8BIT,
	},
	{
		.compat = "fsl,b4860-clockgen",
		.guts_compat = "fsl,b4860-device-config",
		.init_periph = t2080_init_periph,
		.cmux_groups = {
			&clockgen2_cmux_cga12, &clockgen2_cmux_cgb
		},
		.hwaccel = {
			&t2080_hwa1
		},
		.cmux_to_group = {
			0, 1, 1, 1, -1
		},
		.pll_mask = 0x3f,
		.flags = CG_PLL_8BIT,
	},
	{
		.compat = "fsl,ls1021a-clockgen",
		.cmux_groups = {
			&t1023_cmux
		},
		.cmux_to_group = {
			0, -1
		},
		.pll_mask = 0x03,
	},
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	{
		.compat = "fsl,ls1043a-clockgen",
		.init_periph = t2080_init_periph,
		.cmux_groups = {
			&t1040_cmux
		},
		.hwaccel = {
			&ls1043a_hwa1, &ls1043a_hwa2
		},
		.cmux_to_group = {
			0, -1
		},
		.pll_mask = 0x07,
		.flags = CG_PLL_8BIT,
	},
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	{
		.compat = "fsl,ls2080a-clockgen",
		.cmux_groups = {
			&clockgen2_cmux_cga12, &clockgen2_cmux_cgb
		},
		.cmux_to_group = {
			0, 0, 1, 1, -1
		},
		.pll_mask = 0x37,
		.flags = CG_VER3 | CG_LITTLE_ENDIAN,
	},
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	{
		.compat = "fsl,p2041-clockgen",
		.guts_compat = "fsl,qoriq-device-config-1.0",
		.init_periph = p2041_init_periph,
		.cmux_groups = {
			&p2041_cmux_grp1, &p2041_cmux_grp2
		},
		.cmux_to_group = {
			0, 0, 1, 1, -1
		},
		.pll_mask = 0x07,
	},
	{
		.compat = "fsl,p3041-clockgen",
		.guts_compat = "fsl,qoriq-device-config-1.0",
		.init_periph = p2041_init_periph,
		.cmux_groups = {
			&p2041_cmux_grp1, &p2041_cmux_grp2
		},
		.cmux_to_group = {
			0, 0, 1, 1, -1
		},
		.pll_mask = 0x07,
	},
	{
		.compat = "fsl,p4080-clockgen",
		.guts_compat = "fsl,qoriq-device-config-1.0",
		.init_periph = p4080_init_periph,
		.cmux_groups = {
			&p4080_cmux_grp1, &p4080_cmux_grp2
		},
		.cmux_to_group = {
			0, 0, 0, 0, 1, 1, 1, 1
		},
		.pll_mask = 0x1f,
	},
	{
		.compat = "fsl,p5020-clockgen",
		.guts_compat = "fsl,qoriq-device-config-1.0",
		.init_periph = p5020_init_periph,
		.cmux_groups = {
			&p2041_cmux_grp1, &p2041_cmux_grp2
		},
		.cmux_to_group = {
			0, 1, -1
		},
		.pll_mask = 0x07,
	},
	{
		.compat = "fsl,p5040-clockgen",
		.guts_compat = "fsl,p5040-device-config",
		.init_periph = p5040_init_periph,
		.cmux_groups = {
			&p5040_cmux_grp1, &p5040_cmux_grp2
		},
		.cmux_to_group = {
			0, 0, 1, 1, -1
		},
		.pll_mask = 0x0f,
	},
	{
		.compat = "fsl,t1023-clockgen",
		.guts_compat = "fsl,t1023-device-config",
		.init_periph = t1023_init_periph,
		.cmux_groups = {
			&t1023_cmux
		},
		.hwaccel = {
			&t1023_hwa1, &t1023_hwa2
		},
		.cmux_to_group = {
			0, 0, -1
		},
		.pll_mask = 0x03,
		.flags = CG_PLL_8BIT,
	},
	{
		.compat = "fsl,t1040-clockgen",
		.guts_compat = "fsl,t1040-device-config",
		.init_periph = t1040_init_periph,
		.cmux_groups = {
			&t1040_cmux
		},
		.cmux_to_group = {
			0, 0, 0, 0, -1
		},
		.pll_mask = 0x07,
		.flags = CG_PLL_8BIT,
	},
	{
		.compat = "fsl,t2080-clockgen",
		.guts_compat = "fsl,t2080-device-config",
		.init_periph = t2080_init_periph,
		.cmux_groups = {
			&clockgen2_cmux_cga12
		},
		.hwaccel = {
			&t2080_hwa1, &t2080_hwa2
		},
		.cmux_to_group = {
			0, -1
		},
		.pll_mask = 0x07,
		.flags = CG_PLL_8BIT,
	},
	{
		.compat = "fsl,t4240-clockgen",
		.guts_compat = "fsl,t4240-device-config",
		.init_periph = t4240_init_periph,
		.cmux_groups = {
			&clockgen2_cmux_cga, &clockgen2_cmux_cgb
		},
		.hwaccel = {
			&t4240_hwa1, NULL, NULL, &t4240_hwa4, &t4240_hwa5
		},
		.cmux_to_group = {
			0, 0, 1, -1
		},
		.pll_mask = 0x3f,
		.flags = CG_PLL_8BIT,
	},
	{},
};

struct mux_hwclock {
627
	struct clk_hw hw;
628 629 630 631 632 633
	struct clockgen *cg;
	const struct clockgen_muxinfo *info;
	u32 __iomem *reg;
	u8 parent_to_clksel[NUM_MUX_PARENTS];
	s8 clksel_to_parent[NUM_MUX_PARENTS];
	int num_parents;
634 635
};

636 637
#define to_mux_hwclock(p)	container_of(p, struct mux_hwclock, hw)
#define CLKSEL_MASK		0x78000000
638 639
#define	CLKSEL_SHIFT		27

640
static int mux_set_parent(struct clk_hw *hw, u8 idx)
641
{
642
	struct mux_hwclock *hwc = to_mux_hwclock(hw);
643 644
	u32 clksel;

645 646 647 648
	if (idx >= hwc->num_parents)
		return -EINVAL;

	clksel = hwc->parent_to_clksel[idx];
649
	cg_out(hwc->cg, (clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
650 651 652 653

	return 0;
}

654
static u8 mux_get_parent(struct clk_hw *hw)
655
{
656
	struct mux_hwclock *hwc = to_mux_hwclock(hw);
657
	u32 clksel;
658
	s8 ret;
659

660
	clksel = (cg_in(hwc->cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
661

662 663 664 665 666 667 668
	ret = hwc->clksel_to_parent[clksel];
	if (ret < 0) {
		pr_err("%s: mux at %p has bad clksel\n", __func__, hwc->reg);
		return 0;
	}

	return ret;
669 670
}

671
static const struct clk_ops cmux_ops = {
672 673
	.get_parent = mux_get_parent,
	.set_parent = mux_set_parent,
674 675
};

676 677 678 679 680 681 682 683 684 685 686
/*
 * Don't allow setting for now, as the clock options haven't been
 * sanitized for additional restrictions.
 */
static const struct clk_ops hwaccel_ops = {
	.get_parent = mux_get_parent,
};

static const struct clockgen_pll_div *get_pll_div(struct clockgen *cg,
						  struct mux_hwclock *hwc,
						  int idx)
687
{
688
	int pll, div;
689

690 691
	if (!(hwc->info->clksel[idx].flags & CLKSEL_VALID))
		return NULL;
692

693 694
	pll = hwc->info->clksel[idx].pll;
	div = hwc->info->clksel[idx].div;
695

696 697
	return &cg->pll[pll].div[div];
}
698

699 700 701 702 703 704 705 706 707 708 709 710 711
static struct clk * __init create_mux_common(struct clockgen *cg,
					     struct mux_hwclock *hwc,
					     const struct clk_ops *ops,
					     unsigned long min_rate,
					     unsigned long pct80_rate,
					     const char *fmt, int idx)
{
	struct clk_init_data init = {};
	struct clk *clk;
	const struct clockgen_pll_div *div;
	const char *parent_names[NUM_MUX_PARENTS];
	char name[32];
	int i, j;
712

713
	snprintf(name, sizeof(name), fmt, idx);
714

715 716
	for (i = 0, j = 0; i < NUM_MUX_PARENTS; i++) {
		unsigned long rate;
717

718
		hwc->clksel_to_parent[i] = -1;
719

720 721 722
		div = get_pll_div(cg, hwc, i);
		if (!div)
			continue;
723

724 725 726 727 728 729 730 731 732 733 734 735
		rate = clk_get_rate(div->clk);

		if (hwc->info->clksel[i].flags & CLKSEL_80PCT &&
		    rate > pct80_rate)
			continue;
		if (rate < min_rate)
			continue;

		parent_names[j] = div->name;
		hwc->parent_to_clksel[j] = i;
		hwc->clksel_to_parent[i] = j;
		j++;
736 737
	}

738 739
	init.name = name;
	init.ops = ops;
740
	init.parent_names = parent_names;
741
	init.num_parents = hwc->num_parents = j;
742
	init.flags = 0;
743 744
	hwc->hw.init = &init;
	hwc->cg = cg;
745

746
	clk = clk_register(NULL, &hwc->hw);
747
	if (IS_ERR(clk)) {
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778
		pr_err("%s: Couldn't register %s: %ld\n", __func__, name,
		       PTR_ERR(clk));
		kfree(hwc);
		return NULL;
	}

	return clk;
}

static struct clk * __init create_one_cmux(struct clockgen *cg, int idx)
{
	struct mux_hwclock *hwc;
	const struct clockgen_pll_div *div;
	unsigned long plat_rate, min_rate;
	u64 pct80_rate;
	u32 clksel;

	hwc = kzalloc(sizeof(*hwc), GFP_KERNEL);
	if (!hwc)
		return NULL;

	hwc->reg = cg->regs + 0x20 * idx;
	hwc->info = cg->info.cmux_groups[cg->info.cmux_to_group[idx]];

	/*
	 * Find the rate for the default clksel, and treat it as the
	 * maximum rated core frequency.  If this is an incorrect
	 * assumption, certain clock options (possibly including the
	 * default clksel) may be inappropriately excluded on certain
	 * chips.
	 */
779
	clksel = (cg_in(cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
	div = get_pll_div(cg, hwc, clksel);
	if (!div)
		return NULL;

	pct80_rate = clk_get_rate(div->clk);
	pct80_rate *= 8;
	do_div(pct80_rate, 10);

	plat_rate = clk_get_rate(cg->pll[PLATFORM_PLL].div[PLL_DIV1].clk);

	if (cg->info.flags & CG_CMUX_GE_PLAT)
		min_rate = plat_rate;
	else
		min_rate = plat_rate / 2;

	return create_mux_common(cg, hwc, &cmux_ops, min_rate,
				 pct80_rate, "cg-cmux%d", idx);
}

static struct clk * __init create_one_hwaccel(struct clockgen *cg, int idx)
{
	struct mux_hwclock *hwc;

	hwc = kzalloc(sizeof(*hwc), GFP_KERNEL);
	if (!hwc)
		return NULL;

	hwc->reg = cg->regs + 0x20 * idx + 0x10;
	hwc->info = cg->info.hwaccel[idx];

	return create_mux_common(cg, hwc, &hwaccel_ops, 0, 0,
				 "cg-hwaccel%d", idx);
}

static void __init create_muxes(struct clockgen *cg)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(cg->cmux); i++) {
		if (cg->info.cmux_to_group[i] < 0)
			break;
		if (cg->info.cmux_to_group[i] >=
		    ARRAY_SIZE(cg->info.cmux_groups)) {
			WARN_ON_ONCE(1);
			continue;
		}

		cg->cmux[i] = create_one_cmux(cg, i);
828 829
	}

830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861
	for (i = 0; i < ARRAY_SIZE(cg->hwaccel); i++) {
		if (!cg->info.hwaccel[i])
			continue;

		cg->hwaccel[i] = create_one_hwaccel(cg, i);
	}
}

static void __init clockgen_init(struct device_node *np);

/* Legacy nodes may get probed before the parent clockgen node */
static void __init legacy_init_clockgen(struct device_node *np)
{
	if (!clockgen.node)
		clockgen_init(of_get_parent(np));
}

/* Legacy node */
static void __init core_mux_init(struct device_node *np)
{
	struct clk *clk;
	struct resource res;
	int idx, rc;

	legacy_init_clockgen(np);

	if (of_address_to_resource(np, 0, &res))
		return;

	idx = (res.start & 0xf0) >> 5;
	clk = clockgen.cmux[idx];

862 863
	rc = of_clk_add_provider(np, of_clk_src_simple_get, clk);
	if (rc) {
864 865 866
		pr_err("%s: Couldn't register clk provider for node %s: %d\n",
		       __func__, np->name, rc);
		return;
867
	}
868
}
869

870 871 872 873 874 875 876 877
static struct clk *sysclk_from_fixed(struct device_node *node, const char *name)
{
	u32 rate;

	if (of_property_read_u32(node, "clock-frequency", &rate))
		return ERR_PTR(-ENODEV);

	return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
878 879
}

880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938
static struct clk *sysclk_from_parent(const char *name)
{
	struct clk *clk;
	const char *parent_name;

	clk = of_clk_get(clockgen.node, 0);
	if (IS_ERR(clk))
		return clk;

	/* Register the input clock under the desired name. */
	parent_name = __clk_get_name(clk);
	clk = clk_register_fixed_factor(NULL, name, parent_name,
					0, 1, 1);
	if (IS_ERR(clk))
		pr_err("%s: Couldn't register %s: %ld\n", __func__, name,
		       PTR_ERR(clk));

	return clk;
}

static struct clk * __init create_sysclk(const char *name)
{
	struct device_node *sysclk;
	struct clk *clk;

	clk = sysclk_from_fixed(clockgen.node, name);
	if (!IS_ERR(clk))
		return clk;

	clk = sysclk_from_parent(name);
	if (!IS_ERR(clk))
		return clk;

	sysclk = of_get_child_by_name(clockgen.node, "sysclk");
	if (sysclk) {
		clk = sysclk_from_fixed(sysclk, name);
		if (!IS_ERR(clk))
			return clk;
	}

	pr_err("%s: No input clock\n", __func__);
	return NULL;
}

/* Legacy node */
static void __init sysclk_init(struct device_node *node)
{
	struct clk *clk;

	legacy_init_clockgen(node);

	clk = clockgen.sysclk;
	if (clk)
		of_clk_add_provider(node, of_clk_src_simple_get, clk);
}

#define PLL_KILL BIT(31)

static void __init create_one_pll(struct clockgen *cg, int idx)
939
{
940
	u32 __iomem *reg;
941
	u32 mult;
942 943
	struct clockgen_pll *pll = &cg->pll[idx];
	int i;
944

945
	if (!(cg->info.pll_mask & (1 << idx)))
946 947
		return;

948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974
	if (cg->info.flags & CG_VER3) {
		switch (idx) {
		case PLATFORM_PLL:
			reg = cg->regs + 0x60080;
			break;
		case CGA_PLL1:
			reg = cg->regs + 0x80;
			break;
		case CGA_PLL2:
			reg = cg->regs + 0xa0;
			break;
		case CGB_PLL1:
			reg = cg->regs + 0x10080;
			break;
		case CGB_PLL2:
			reg = cg->regs + 0x100a0;
			break;
		default:
			WARN_ONCE(1, "index %d\n", idx);
			return;
		}
	} else {
		if (idx == PLATFORM_PLL)
			reg = cg->regs + 0xc00;
		else
			reg = cg->regs + 0x800 + 0x20 * (idx - 1);
	}
975

976
	/* Get the multiple of PLL */
977
	mult = cg_in(cg, reg);
978 979

	/* Check if this PLL is disabled */
980
	if (mult & PLL_KILL) {
981 982
		pr_debug("%s(): pll %p disabled\n", __func__, reg);
		return;
983 984
	}

985 986
	if ((cg->info.flags & CG_VER3) ||
	    ((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL))
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
		mult = (mult & GENMASK(8, 1)) >> 1;
	else
		mult = (mult & GENMASK(6, 1)) >> 1;

	for (i = 0; i < ARRAY_SIZE(pll->div); i++) {
		struct clk *clk;

		snprintf(pll->div[i].name, sizeof(pll->div[i].name),
			 "cg-pll%d-div%d", idx, i + 1);

		clk = clk_register_fixed_factor(NULL,
				pll->div[i].name, "cg-sysclk", 0, mult, i + 1);
		if (IS_ERR(clk)) {
			pr_err("%s: %s: register failed %ld\n",
			       __func__, pll->div[i].name, PTR_ERR(clk));
			continue;
		}

		pll->div[i].clk = clk;
1006
	}
1007 1008 1009 1010 1011 1012 1013 1014 1015
}

static void __init create_plls(struct clockgen *cg)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(cg->pll); i++)
		create_one_pll(cg, i);
}
1016

1017 1018 1019 1020 1021 1022 1023 1024 1025 1026
static void __init legacy_pll_init(struct device_node *np, int idx)
{
	struct clockgen_pll *pll;
	struct clk_onecell_data *onecell_data;
	struct clk **subclks;
	int count, rc;

	legacy_init_clockgen(np);

	pll = &clockgen.pll[idx];
1027 1028
	count = of_property_count_strings(np, "clock-output-names");

1029 1030
	BUILD_BUG_ON(ARRAY_SIZE(pll->div) < 4);
	subclks = kcalloc(4, sizeof(struct clk *), GFP_KERNEL);
1031
	if (!subclks)
1032
		return;
1033

1034
	onecell_data = kmalloc(sizeof(*onecell_data), GFP_KERNEL);
1035
	if (!onecell_data)
1036 1037
		goto err_clks;

1038 1039 1040 1041 1042 1043 1044 1045 1046
	if (count <= 3) {
		subclks[0] = pll->div[0].clk;
		subclks[1] = pll->div[1].clk;
		subclks[2] = pll->div[3].clk;
	} else {
		subclks[0] = pll->div[0].clk;
		subclks[1] = pll->div[1].clk;
		subclks[2] = pll->div[2].clk;
		subclks[3] = pll->div[3].clk;
1047 1048 1049 1050 1051 1052 1053
	}

	onecell_data->clks = subclks;
	onecell_data->clk_num = count;

	rc = of_clk_add_provider(np, of_clk_src_onecell_get, onecell_data);
	if (rc) {
1054 1055
		pr_err("%s: Couldn't register clk provider for node %s: %d\n",
		       __func__, np->name, rc);
1056 1057 1058 1059 1060 1061 1062 1063
		goto err_cell;
	}

	return;
err_cell:
	kfree(onecell_data);
err_clks:
	kfree(subclks);
1064 1065
}

1066 1067
/* Legacy node */
static void __init pltfrm_pll_init(struct device_node *np)
1068
{
1069 1070
	legacy_pll_init(np, PLATFORM_PLL);
}
1071

1072 1073 1074 1075 1076 1077 1078
/* Legacy node */
static void __init core_pll_init(struct device_node *np)
{
	struct resource res;
	int idx;

	if (of_address_to_resource(np, 0, &res))
1079
		return;
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089

	if ((res.start & 0xfff) == 0xc00) {
		/*
		 * ls1021a devtree labels the platform PLL
		 * with the core PLL compatible
		 */
		pltfrm_pll_init(np);
	} else {
		idx = (res.start & 0xf0) >> 5;
		legacy_pll_init(np, CGA_PLL1 + idx);
1090
	}
1091
}
1092

1093 1094 1095 1096 1097 1098 1099 1100 1101 1102
static struct clk *clockgen_clk_get(struct of_phandle_args *clkspec, void *data)
{
	struct clockgen *cg = data;
	struct clk *clk;
	struct clockgen_pll *pll;
	u32 type, idx;

	if (clkspec->args_count < 2) {
		pr_err("%s: insufficient phandle args\n", __func__);
		return ERR_PTR(-EINVAL);
1103 1104
	}

1105 1106
	type = clkspec->args[0];
	idx = clkspec->args[1];
1107

1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
	switch (type) {
	case 0:
		if (idx != 0)
			goto bad_args;
		clk = cg->sysclk;
		break;
	case 1:
		if (idx >= ARRAY_SIZE(cg->cmux))
			goto bad_args;
		clk = cg->cmux[idx];
		break;
	case 2:
		if (idx >= ARRAY_SIZE(cg->hwaccel))
			goto bad_args;
		clk = cg->hwaccel[idx];
		break;
	case 3:
		if (idx >= ARRAY_SIZE(cg->fman))
			goto bad_args;
		clk = cg->fman[idx];
		break;
	case 4:
		pll = &cg->pll[PLATFORM_PLL];
		if (idx >= ARRAY_SIZE(pll->div))
			goto bad_args;
		clk = pll->div[idx].clk;
		break;
	default:
		goto bad_args;
	}

	if (!clk)
		return ERR_PTR(-ENOENT);
	return clk;

bad_args:
	pr_err("%s: Bad phandle args %u %u\n", __func__, type, idx);
	return ERR_PTR(-EINVAL);
1146
}
1147

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
#ifdef CONFIG_PPC
#include <asm/mpc85xx.h>

static const u32 a4510_svrs[] __initconst = {
	(SVR_P2040 << 8) | 0x10,	/* P2040 1.0 */
	(SVR_P2040 << 8) | 0x11,	/* P2040 1.1 */
	(SVR_P2041 << 8) | 0x10,	/* P2041 1.0 */
	(SVR_P2041 << 8) | 0x11,	/* P2041 1.1 */
	(SVR_P3041 << 8) | 0x10,	/* P3041 1.0 */
	(SVR_P3041 << 8) | 0x11,	/* P3041 1.1 */
	(SVR_P4040 << 8) | 0x20,	/* P4040 2.0 */
	(SVR_P4080 << 8) | 0x20,	/* P4080 2.0 */
	(SVR_P5010 << 8) | 0x10,	/* P5010 1.0 */
	(SVR_P5010 << 8) | 0x20,	/* P5010 2.0 */
	(SVR_P5020 << 8) | 0x10,	/* P5020 1.0 */
	(SVR_P5021 << 8) | 0x10,	/* P5021 1.0 */
	(SVR_P5040 << 8) | 0x10,	/* P5040 1.0 */
};

#define SVR_SECURITY	0x80000	/* The Security (E) bit */

static bool __init has_erratum_a4510(void)
1170
{
1171 1172 1173 1174 1175 1176 1177 1178
	u32 svr = mfspr(SPRN_SVR);
	int i;

	svr &= ~SVR_SECURITY;

	for (i = 0; i < ARRAY_SIZE(a4510_svrs); i++) {
		if (svr == a4510_svrs[i])
			return true;
1179 1180
	}

1181 1182 1183 1184 1185 1186 1187 1188
	return false;
}
#else
static bool __init has_erratum_a4510(void)
{
	return false;
}
#endif
1189

1190 1191 1192 1193
static void __init clockgen_init(struct device_node *np)
{
	int i, ret;
	bool is_old_ls1021a = false;
1194

1195 1196
	/* May have already been called by a legacy probe */
	if (clockgen.node)
1197 1198
		return;

1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
	clockgen.node = np;
	clockgen.regs = of_iomap(np, 0);
	if (!clockgen.regs &&
	    of_device_is_compatible(of_root, "fsl,ls1021a")) {
		/* Compatibility hack for old, broken device trees */
		clockgen.regs = ioremap(0x1ee1000, 0x1000);
		is_old_ls1021a = true;
	}
	if (!clockgen.regs) {
		pr_err("%s(): %s: of_iomap() failed\n", __func__, np->name);
1209 1210 1211
		return;
	}

1212 1213 1214 1215 1216 1217
	for (i = 0; i < ARRAY_SIZE(chipinfo); i++) {
		if (of_device_is_compatible(np, chipinfo[i].compat))
			break;
		if (is_old_ls1021a &&
		    !strcmp(chipinfo[i].compat, "fsl,ls1021a-clockgen"))
			break;
1218 1219
	}

1220 1221 1222 1223 1224 1225 1226 1227 1228
	if (i == ARRAY_SIZE(chipinfo)) {
		pr_err("%s: unknown clockgen node %s\n", __func__,
		       np->full_name);
		goto err;
	}
	clockgen.info = chipinfo[i];

	if (clockgen.info.guts_compat) {
		struct device_node *guts;
1229

1230 1231 1232 1233 1234 1235 1236 1237
		guts = of_find_compatible_node(NULL, NULL,
					       clockgen.info.guts_compat);
		if (guts) {
			clockgen.guts = of_iomap(guts, 0);
			if (!clockgen.guts) {
				pr_err("%s: Couldn't map %s regs\n", __func__,
				       guts->full_name);
			}
1238
		}
1239

1240 1241
	}

1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255
	if (has_erratum_a4510())
		clockgen.info.flags |= CG_CMUX_GE_PLAT;

	clockgen.sysclk = create_sysclk("cg-sysclk");
	create_plls(&clockgen);
	create_muxes(&clockgen);

	if (clockgen.info.init_periph)
		clockgen.info.init_periph(&clockgen);

	ret = of_clk_add_provider(np, clockgen_clk_get, &clockgen);
	if (ret) {
		pr_err("%s: Couldn't register clk provider for node %s: %d\n",
		       __func__, np->name, ret);
1256 1257 1258
	}

	return;
1259 1260 1261
err:
	iounmap(clockgen.regs);
	clockgen.regs = NULL;
1262 1263
}

1264 1265 1266
CLK_OF_DECLARE(qoriq_clockgen_1, "fsl,qoriq-clockgen-1.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_2, "fsl,qoriq-clockgen-2.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls1021a, "fsl,ls1021a-clockgen", clockgen_init);
1267
CLK_OF_DECLARE(qoriq_clockgen_ls1043a, "fsl,ls1043a-clockgen", clockgen_init);
1268
CLK_OF_DECLARE(qoriq_clockgen_ls2080a, "fsl,ls2080a-clockgen", clockgen_init);
1269 1270

/* Legacy nodes */
1271 1272 1273 1274 1275 1276
CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);
CLK_OF_DECLARE(qoriq_sysclk_2, "fsl,qoriq-sysclk-2.0", sysclk_init);
CLK_OF_DECLARE(qoriq_core_pll_1, "fsl,qoriq-core-pll-1.0", core_pll_init);
CLK_OF_DECLARE(qoriq_core_pll_2, "fsl,qoriq-core-pll-2.0", core_pll_init);
CLK_OF_DECLARE(qoriq_core_mux_1, "fsl,qoriq-core-mux-1.0", core_mux_init);
CLK_OF_DECLARE(qoriq_core_mux_2, "fsl,qoriq-core-mux-2.0", core_mux_init);
1277 1278
CLK_OF_DECLARE(qoriq_pltfrm_pll_1, "fsl,qoriq-platform-pll-1.0", pltfrm_pll_init);
CLK_OF_DECLARE(qoriq_pltfrm_pll_2, "fsl,qoriq-platform-pll-2.0", pltfrm_pll_init);