[mirror_ubuntu-bionic-kernel.git] / drivers / clk / versatile / clk-impd1.c

/*
 * 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 "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);
Commit	Line	Data
70ee6577 LW	1	/*
70ee6577 LW	2	* Clock driver for the ARM Integrator/IM-PD1 board
8e048b99	3	* Copyright (C) 2012-2013 Linus Walleij
70ee6577 LW	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*/
	9	#include <linux/clk-provider.h>
70ee6577 LW	10	#include <linux/clkdev.h>
	11	#include <linux/err.h>
	12	#include <linux/io.h>
	13	#include <linux/platform_data/clk-integrator.h>
	14
70ee6577 LW	15	#include "clk-icst.h"
70ee6577 LW	16
cc0cc4ca LW	17	#define IMPD1_OSC1 0x00
	18	#define IMPD1_OSC2 0x04
	19	#define IMPD1_LOCK 0x08
	20
70ee6577	21	struct impd1_clk {
222cb1bf LW	22	char *pclkname;
222cb1bf LW	23	struct clk *pclk;
8e048b99 LW	24	char *vco1name;
	25	struct clk *vco1clk;
	26	char *vco2name;
	27	struct clk *vco2clk;
	28	struct clk *mmciclk;
	29	char *uartname;
70ee6577	30	struct clk *uartclk;
8e048b99 LW	31	char *spiname;
	32	struct clk *spiclk;
	33	char *scname;
	34	struct clk *scclk;
222cb1bf	35	struct clk_lookup *clks[15];
70ee6577 LW	36	};
70ee6577 LW	37
8e048b99	38	/* One entry for each connected IM-PD1 LM */
70ee6577 LW	39	static struct impd1_clk impd1_clks[4];
	40
	41	/*
8e048b99	42	* There are two VCO's on the IM-PD1
70ee6577 LW	43	*/
70ee6577 LW	44
8e048b99	45	static const struct icst_params impd1_vco1_params = {
70ee6577 LW	46	.ref = 24000000, /* 24 MHz */
	47	.vco_max = ICST525_VCO_MAX_3V,
	48	.vco_min = ICST525_VCO_MIN,
	49	.vd_min = 12,
	50	.vd_max = 519,
	51	.rd_min = 3,
	52	.rd_max = 120,
	53	.s2div = icst525_s2div,
	54	.idx2s = icst525_idx2s,
	55	};
	56
	57	static const struct clk_icst_desc impd1_icst1_desc = {
8e048b99	58	.params = &impd1_vco1_params,
70ee6577 LW	59	.vco_offset = IMPD1_OSC1,
	60	.lock_offset = IMPD1_LOCK,
	61	};
	62
8e048b99 LW	63	static const struct icst_params impd1_vco2_params = {
	64	.ref = 24000000, /* 24 MHz */
	65	.vco_max = ICST525_VCO_MAX_3V,
	66	.vco_min = ICST525_VCO_MIN,
	67	.vd_min = 12,
	68	.vd_max = 519,
	69	.rd_min = 3,
	70	.rd_max = 120,
	71	.s2div = icst525_s2div,
	72	.idx2s = icst525_idx2s,
	73	};
	74
	75	static const struct clk_icst_desc impd1_icst2_desc = {
	76	.params = &impd1_vco2_params,
	77	.vco_offset = IMPD1_OSC2,
	78	.lock_offset = IMPD1_LOCK,
	79	};
	80
70ee6577 LW	81	/**
	82	* integrator_impd1_clk_init() - set up the integrator clock tree
	83	* @base: base address of the logic module (LM)
	84	* @id: the ID of this LM
	85	*/
	86	void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
	87	{
	88	struct impd1_clk *imc;
	89	struct clk *clk;
222cb1bf	90	struct clk *pclk;
70ee6577 LW	91	int i;
	92
	93	if (id > 3) {
	94	pr_crit("no more than 4 LMs can be attached\n");
	95	return;
	96	}
	97	imc = &impd1_clks[id];
	98
222cb1bf LW	99	/* Register the fixed rate PCLK */
222cb1bf LW	100	imc->pclkname = kasprintf(GFP_KERNEL, "lm%x-pclk", id);
ac82a8b5	101	pclk = clk_register_fixed_rate(NULL, imc->pclkname, NULL, 0, 0);
222cb1bf LW	102	imc->pclk = pclk;
222cb1bf LW	103
8e048b99	104	imc->vco1name = kasprintf(GFP_KERNEL, "lm%x-vco1", id);
bf6edb4b LW	105	clk = icst_clk_register(NULL, &impd1_icst1_desc, imc->vco1name, NULL,
bf6edb4b LW	106	base);
ae6e694e	107	imc->vco1clk = clk;
222cb1bf LW	108	imc->clks[0] = clkdev_alloc(pclk, "apb_pclk", "lm%x:01000", id);
222cb1bf LW	109	imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
70ee6577	110
8e048b99 LW	111	/* VCO2 is also called "CLK2" */
8e048b99 LW	112	imc->vco2name = kasprintf(GFP_KERNEL, "lm%x-vco2", id);
bf6edb4b LW	113	clk = icst_clk_register(NULL, &impd1_icst2_desc, imc->vco2name, NULL,
bf6edb4b LW	114	base);
8e048b99 LW	115	imc->vco2clk = clk;
	116
	117	/* MMCI uses CLK2 right off */
222cb1bf LW	118	imc->clks[2] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00700", id);
222cb1bf LW	119	imc->clks[3] = clkdev_alloc(clk, NULL, "lm%x:00700", id);
8e048b99 LW	120
	121	/* UART reference clock divides CLK2 by a fixed factor 4 */
	122	imc->uartname = kasprintf(GFP_KERNEL, "lm%x-uartclk", id);
	123	clk = clk_register_fixed_factor(NULL, imc->uartname, imc->vco2name,
	124	CLK_IGNORE_UNUSED, 1, 4);
70ee6577	125	imc->uartclk = clk;
222cb1bf LW	126	imc->clks[4] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00100", id);
	127	imc->clks[5] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
	128	imc->clks[6] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00200", id);
	129	imc->clks[7] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
8e048b99 LW	130
	131	/* SPI PL022 clock divides CLK2 by a fixed factor 64 */
	132	imc->spiname = kasprintf(GFP_KERNEL, "lm%x-spiclk", id);
	133	clk = clk_register_fixed_factor(NULL, imc->spiname, imc->vco2name,
	134	CLK_IGNORE_UNUSED, 1, 64);
222cb1bf LW	135	imc->clks[8] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00300", id);
	136	imc->clks[9] = clkdev_alloc(clk, NULL, "lm%x:00300", id);
	137
	138	/* The GPIO blocks and AACI have only PCLK */
	139	imc->clks[10] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00400", id);
	140	imc->clks[11] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00500", id);
	141	imc->clks[12] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00800", id);
8e048b99 LW	142
	143	/* Smart Card clock divides CLK2 by a fixed factor 4 */
	144	imc->scname = kasprintf(GFP_KERNEL, "lm%x-scclk", id);
	145	clk = clk_register_fixed_factor(NULL, imc->scname, imc->vco2name,
	146	CLK_IGNORE_UNUSED, 1, 4);
	147	imc->scclk = clk;
222cb1bf LW	148	imc->clks[13] = clkdev_alloc(pclk, "apb_pclk", "lm%x:00600", id);
222cb1bf LW	149	imc->clks[14] = clkdev_alloc(clk, NULL, "lm%x:00600", id);
70ee6577 LW	150
	151	for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
	152	clkdev_add(imc->clks[i]);
	153	}
a218d7fa	154	EXPORT_SYMBOL_GPL(integrator_impd1_clk_init);
70ee6577 LW	155
	156	void integrator_impd1_clk_exit(unsigned int id)
	157	{
	158	int i;
	159	struct impd1_clk *imc;
	160
	161	if (id > 3)
	162	return;
	163	imc = &impd1_clks[id];
	164
	165	for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
	166	clkdev_drop(imc->clks[i]);
8e048b99	167	clk_unregister(imc->spiclk);
70ee6577	168	clk_unregister(imc->uartclk);
8e048b99 LW	169	clk_unregister(imc->vco2clk);
8e048b99 LW	170	clk_unregister(imc->vco1clk);
222cb1bf	171	clk_unregister(imc->pclk);
8e048b99 LW	172	kfree(imc->scname);
	173	kfree(imc->spiname);
	174	kfree(imc->uartname);
	175	kfree(imc->vco2name);
	176	kfree(imc->vco1name);
222cb1bf	177	kfree(imc->pclkname);
70ee6577	178	}
a218d7fa	179	EXPORT_SYMBOL_GPL(integrator_impd1_clk_exit);