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/*
* Clock driver for the ARM Integrator/AP and Integrator/CP 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/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/platform_data/clk-integrator.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include "clk-icst.h"
/*
* Implementation of the ARM Integrator/AP and Integrator/CP clock tree.
* Inspired by portions of:
* plat-versatile/clock.c and plat-versatile/include/plat/clock.h
*/
static const struct icst_params cp_auxvco_params = {
.ref = 24000000,
.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 __initdata cp_icst_desc = {
.params = &cp_auxvco_params,
.vco_offset = 0x1c,
.lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,
};
/*
* integrator_clk_init() - set up the integrator clock tree
* @is_cp: pass true if it's the Integrator/CP else AP is assumed
*/
void __init integrator_clk_init(bool is_cp)
{
struct clk *clk;
/* APB clock dummy */
clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
clk_register_clkdev(clk, "apb_pclk", NULL);
/* UART reference clock */
clk = clk_register_fixed_rate(NULL, "uartclk", NULL, CLK_IS_ROOT,
14745600);
clk_register_clkdev(clk, NULL, "uart0");
clk_register_clkdev(clk, NULL, "uart1");
if (is_cp)
clk_register_clkdev(clk, NULL, "mmci");
/* 24 MHz clock */
clk = clk_register_fixed_rate(NULL, "clk24mhz", NULL, CLK_IS_ROOT,
24000000);
clk_register_clkdev(clk, NULL, "kmi0");
clk_register_clkdev(clk, NULL, "kmi1");
if (!is_cp)
clk_register_clkdev(clk, NULL, "ap_timer");
if (!is_cp)
return;
/* 1 MHz clock */
clk = clk_register_fixed_rate(NULL, "clk1mhz", NULL, CLK_IS_ROOT,
1000000);
clk_register_clkdev(clk, NULL, "sp804");
/* ICST VCO clock used on the Integrator/CP CLCD */
clk = icst_clk_register(NULL, &cp_icst_desc,
__io_address(INTEGRATOR_HDR_BASE));
clk_register_clkdev(clk, NULL, "clcd");
}
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