+++ /dev/null
-/*
- * r7a72100 clock framework support
- *
- * Copyright (C) 2013 Renesas Solutions Corp.
- * Copyright (C) 2012 Phil Edworthy
- * Copyright (C) 2011 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/sh_clk.h>
-#include <linux/clkdev.h>
-
-#include "common.h"
-#include "r7s72100.h"
-
-/* Frequency Control Registers */
-#define FRQCR 0xfcfe0010
-#define FRQCR2 0xfcfe0014
-/* Standby Control Registers */
-#define STBCR3 0xfcfe0420
-#define STBCR4 0xfcfe0424
-#define STBCR7 0xfcfe0430
-#define STBCR9 0xfcfe0438
-#define STBCR10 0xfcfe043c
-
-#define PLL_RATE 30
-
-static struct clk_mapping cpg_mapping = {
- .phys = 0xfcfe0000,
- .len = 0x1000,
-};
-
-/* Fixed 32 KHz root clock for RTC */
-static struct clk r_clk = {
- .rate = 32768,
-};
-
-/*
- * Default rate for the root input clock, reset this with clk_set_rate()
- * from the platform code.
- */
-static struct clk extal_clk = {
- .rate = 13330000,
- .mapping = &cpg_mapping,
-};
-
-static unsigned long pll_recalc(struct clk *clk)
-{
- return clk->parent->rate * PLL_RATE;
-}
-
-static struct sh_clk_ops pll_clk_ops = {
- .recalc = pll_recalc,
-};
-
-static struct clk pll_clk = {
- .ops = &pll_clk_ops,
- .parent = &extal_clk,
- .flags = CLK_ENABLE_ON_INIT,
-};
-
-static unsigned long bus_recalc(struct clk *clk)
-{
- return clk->parent->rate / 3;
-}
-
-static struct sh_clk_ops bus_clk_ops = {
- .recalc = bus_recalc,
-};
-
-static struct clk bus_clk = {
- .ops = &bus_clk_ops,
- .parent = &pll_clk,
- .flags = CLK_ENABLE_ON_INIT,
-};
-
-static unsigned long peripheral0_recalc(struct clk *clk)
-{
- return clk->parent->rate / 12;
-}
-
-static struct sh_clk_ops peripheral0_clk_ops = {
- .recalc = peripheral0_recalc,
-};
-
-static struct clk peripheral0_clk = {
- .ops = &peripheral0_clk_ops,
- .parent = &pll_clk,
- .flags = CLK_ENABLE_ON_INIT,
-};
-
-static unsigned long peripheral1_recalc(struct clk *clk)
-{
- return clk->parent->rate / 6;
-}
-
-static struct sh_clk_ops peripheral1_clk_ops = {
- .recalc = peripheral1_recalc,
-};
-
-static struct clk peripheral1_clk = {
- .ops = &peripheral1_clk_ops,
- .parent = &pll_clk,
- .flags = CLK_ENABLE_ON_INIT,
-};
-
-struct clk *main_clks[] = {
- &r_clk,
- &extal_clk,
- &pll_clk,
- &bus_clk,
- &peripheral0_clk,
- &peripheral1_clk,
-};
-
-static int div2[] = { 1, 3, 0, 3 }; /* 1, 2/3, reserve, 1/3 */
-static int multipliers[] = { 1, 2, 1, 1 };
-
-static struct clk_div_mult_table div4_div_mult_table = {
- .divisors = div2,
- .nr_divisors = ARRAY_SIZE(div2),
- .multipliers = multipliers,
- .nr_multipliers = ARRAY_SIZE(multipliers),
-};
-
-static struct clk_div4_table div4_table = {
- .div_mult_table = &div4_div_mult_table,
-};
-
-enum { DIV4_I,
- DIV4_NR };
-
-#define DIV4(_reg, _bit, _mask, _flags) \
- SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
-
-/* The mask field specifies the div2 entries that are valid */
-struct clk div4_clks[DIV4_NR] = {
- [DIV4_I] = DIV4(FRQCR, 8, 0xB, CLK_ENABLE_REG_16BIT
- | CLK_ENABLE_ON_INIT),
-};
-
-enum {
- MSTP107, MSTP106, MSTP105, MSTP104, MSTP103,
- MSTP97, MSTP96, MSTP95, MSTP94,
- MSTP74,
- MSTP47, MSTP46, MSTP45, MSTP44, MSTP43, MSTP42, MSTP41, MSTP40,
- MSTP33, MSTP_NR
-};
-
-static struct clk mstp_clks[MSTP_NR] = {
- [MSTP107] = SH_CLK_MSTP8(&peripheral1_clk, STBCR10, 7, 0), /* RSPI0 */
- [MSTP106] = SH_CLK_MSTP8(&peripheral1_clk, STBCR10, 6, 0), /* RSPI1 */
- [MSTP105] = SH_CLK_MSTP8(&peripheral1_clk, STBCR10, 5, 0), /* RSPI2 */
- [MSTP104] = SH_CLK_MSTP8(&peripheral1_clk, STBCR10, 4, 0), /* RSPI3 */
- [MSTP103] = SH_CLK_MSTP8(&peripheral1_clk, STBCR10, 3, 0), /* RSPI4 */
- [MSTP97] = SH_CLK_MSTP8(&peripheral0_clk, STBCR9, 7, 0), /* RIIC0 */
- [MSTP96] = SH_CLK_MSTP8(&peripheral0_clk, STBCR9, 6, 0), /* RIIC1 */
- [MSTP95] = SH_CLK_MSTP8(&peripheral0_clk, STBCR9, 5, 0), /* RIIC2 */
- [MSTP94] = SH_CLK_MSTP8(&peripheral0_clk, STBCR9, 4, 0), /* RIIC3 */
- [MSTP74] = SH_CLK_MSTP8(&peripheral1_clk, STBCR7, 4, 0), /* Ether */
- [MSTP47] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 7, 0), /* SCIF0 */
- [MSTP46] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 6, 0), /* SCIF1 */
- [MSTP45] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 5, 0), /* SCIF2 */
- [MSTP44] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 4, 0), /* SCIF3 */
- [MSTP43] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 3, 0), /* SCIF4 */
- [MSTP42] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 2, 0), /* SCIF5 */
- [MSTP41] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 1, 0), /* SCIF6 */
- [MSTP40] = SH_CLK_MSTP8(&peripheral1_clk, STBCR4, 0, 0), /* SCIF7 */
- [MSTP33] = SH_CLK_MSTP8(&peripheral0_clk, STBCR3, 3, 0), /* MTU2 */
-};
-
-static struct clk_lookup lookups[] = {
- /* main clocks */
- CLKDEV_CON_ID("rclk", &r_clk),
- CLKDEV_CON_ID("extal", &extal_clk),
- CLKDEV_CON_ID("pll_clk", &pll_clk),
- CLKDEV_CON_ID("peripheral_clk", &peripheral1_clk),
-
- /* DIV4 clocks */
- CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
-
- /* MSTP clocks */
- CLKDEV_DEV_ID("rspi-rz.0", &mstp_clks[MSTP107]),
- CLKDEV_DEV_ID("rspi-rz.1", &mstp_clks[MSTP106]),
- CLKDEV_DEV_ID("rspi-rz.2", &mstp_clks[MSTP105]),
- CLKDEV_DEV_ID("rspi-rz.3", &mstp_clks[MSTP104]),
- CLKDEV_DEV_ID("rspi-rz.4", &mstp_clks[MSTP103]),
- CLKDEV_DEV_ID("r7s72100-ether", &mstp_clks[MSTP74]),
-
- /* ICK */
- CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP47]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP46]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP45]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[MSTP44]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.4", &mstp_clks[MSTP43]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.5", &mstp_clks[MSTP42]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.6", &mstp_clks[MSTP41]),
- CLKDEV_ICK_ID("sci_fck", "sh-sci.7", &mstp_clks[MSTP40]),
- CLKDEV_ICK_ID("fck", "sh-mtu2", &mstp_clks[MSTP33]),
-};
-
-void __init r7s72100_clock_init(void)
-{
- int k, ret = 0;
-
- for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
- ret = clk_register(main_clks[k]);
-
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
- if (!ret)
- ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
-
- if (!ret)
- ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
-
- if (!ret)
- shmobile_clk_init();
- else
- panic("failed to setup rza1 clocks\n");
-}
projects / linux-beck.git / commitdiff