- 根目录:
- arch
- arm
- mach-omap1
- clock_data.c
/*
* linux/arch/arm/mach-omap1/clock_data.c
*
* Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
* Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, 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.
*
* To do:
* - Clocks that are only available on some chips should be marked with the
* chips that they are present on.
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/mach-types.h> /* for machine_is_* */
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/clkdev_omap.h>
#include <plat/sram.h> /* for omap_sram_reprogram_clock() */
#include <plat/usb.h> /* for OTG_BASE */
#include "clock.h"
/* Some ARM_IDLECT1 bit shifts - used in struct arm_idlect1_clk */
#define IDL_CLKOUT_ARM_SHIFT 12
#define IDLTIM_ARM_SHIFT 9
#define IDLAPI_ARM_SHIFT 8
#define IDLIF_ARM_SHIFT 6
#define IDLLB_ARM_SHIFT 4 /* undocumented? */
#define OMAP1510_IDLLCD_ARM_SHIFT 3 /* undocumented? */
#define IDLPER_ARM_SHIFT 2
#define IDLXORP_ARM_SHIFT 1
#define IDLWDT_ARM_SHIFT 0
/* Some MOD_CONF_CTRL_0 bit shifts - used in struct clk.enable_bit */
#define CONF_MOD_UART3_CLK_MODE_R 31
#define CONF_MOD_UART2_CLK_MODE_R 30
#define CONF_MOD_UART1_CLK_MODE_R 29
#define CONF_MOD_MMC_SD_CLK_REQ_R 23
#define CONF_MOD_MCBSP3_AUXON 20
/* Some MOD_CONF_CTRL_1 bit shifts - used in struct clk.enable_bit */
#define CONF_MOD_SOSSI_CLK_EN_R 16
/* Some OTG_SYSCON_2-specific bit fields */
#define OTG_SYSCON_2_UHOST_EN_SHIFT 8
/* Some SOFT_REQ_REG bit fields - used in struct clk.enable_bit */
#define SOFT_MMC2_DPLL_REQ_SHIFT 13
#define SOFT_MMC_DPLL_REQ_SHIFT 12
#define SOFT_UART3_DPLL_REQ_SHIFT 11
#define SOFT_UART2_DPLL_REQ_SHIFT 10
#define SOFT_UART1_DPLL_REQ_SHIFT 9
#define SOFT_USB_OTG_DPLL_REQ_SHIFT 8
#define SOFT_CAM_DPLL_REQ_SHIFT 7
#define SOFT_COM_MCKO_REQ_SHIFT 6
#define SOFT_PERIPH_REQ_SHIFT 5 /* sys_ck gate for UART2 ? */
#define USB_REQ_EN_SHIFT 4
#define SOFT_USB_REQ_SHIFT 3 /* sys_ck gate for USB host? */
#define SOFT_SDW_REQ_SHIFT 2 /* sys_ck gate for Bluetooth? */
#define SOFT_COM_REQ_SHIFT 1 /* sys_ck gate for com proc? */
#define SOFT_DPLL_REQ_SHIFT 0
/*
* Omap1 clocks
*/
static struct clk ck_ref = {
.name = "ck_ref",
.ops = &clkops_null,
.rate = 12000000,
};
static struct clk ck_dpll1 = {
.name = "ck_dpll1",
.ops = &clkops_null,
.parent = &ck_ref,
};
/*
* FIXME: This clock seems to be necessary but no-one has asked for its
* activation. [ FIX: SoSSI, SSR ]
*/
static struct arm_idlect1_clk ck_dpll1out = {
.clk = {
.name = "ck_dpll1out",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.flags = CLOCK_IDLE_CONTROL | ENABLE_REG_32BIT |
ENABLE_ON_INIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_CKOUT_ARM,
.recalc = &followparent_recalc,
},
.idlect_shift = IDL_CLKOUT_ARM_SHIFT,
};
static struct clk sossi_ck = {
.name = "ck_sossi",
.ops = &clkops_generic,
.parent = &ck_dpll1out.clk,
.flags = CLOCK_NO_IDLE_PARENT | ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_1),
.enable_bit = CONF_MOD_SOSSI_CLK_EN_R,
.recalc = &omap1_sossi_recalc,
.set_rate = &omap1_set_sossi_rate,
};
static struct clk arm_ck = {
.name = "arm_ck",
.ops = &clkops_null,
.parent = &ck_dpll1,
.rate_offset = CKCTL_ARMDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
};
static struct arm_idlect1_clk armper_ck = {
.clk = {
.name = "armper_ck",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_PERCK,
.rate_offset = CKCTL_PERDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
},
.idlect_shift = IDLPER_ARM_SHIFT,
};
/*
* FIXME: This clock seems to be necessary but no-one has asked for its
* activation. [ GPIO code for 1510 ]
*/
static struct clk arm_gpio_ck = {
.name = "ick",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.flags = ENABLE_ON_INIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_GPIOCK,
.recalc = &followparent_recalc,
};
static struct arm_idlect1_clk armxor_ck = {
.clk = {
.name = "armxor_ck",
.ops = &clkops_generic,
.parent = &ck_ref,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_XORPCK,
.recalc = &followparent_recalc,
},
.idlect_shift = IDLXORP_ARM_SHIFT,
};
static struct arm_idlect1_clk armtim_ck = {
.clk = {
.name = "armtim_ck",
.ops = &clkops_generic,
.parent = &ck_ref,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_TIMCK,
.recalc = &followparent_recalc,
},
.idlect_shift = IDLTIM_ARM_SHIFT,
};
static struct arm_idlect1_clk armwdt_ck = {
.clk = {
.name = "armwdt_ck",
.ops = &clkops_generic,
.parent = &ck_ref,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_WDTCK,
.fixed_div = 14,
.recalc = &omap_fixed_divisor_recalc,
},
.idlect_shift = IDLWDT_ARM_SHIFT,
};
static struct clk arminth_ck16xx = {
.name = "arminth_ck",
.ops = &clkops_null,
.parent = &arm_ck,
.recalc = &followparent_recalc,
/* Note: On 16xx the frequency can be divided by 2 by programming
* ARM_CKCTL:ARM_INTHCK_SEL(14) to 1
*
* 1510 version is in TC clocks.
*/
};
static struct clk dsp_ck = {
.name = "dsp_ck",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.enable_reg = OMAP1_IO_ADDRESS(ARM_CKCTL),
.enable_bit = EN_DSPCK,
.rate_offset = CKCTL_DSPDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
};
static struct clk dspmmu_ck = {
.name = "dspmmu_ck",
.ops = &clkops_null,
.parent = &ck_dpll1,
.rate_offset = CKCTL_DSPMMUDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
};
static struct clk dspper_ck = {
.name = "dspper_ck",
.ops = &clkops_dspck,
.parent = &ck_dpll1,
.enable_reg = DSP_IDLECT2,
.enable_bit = EN_PERCK,
.rate_offset = CKCTL_PERDIV_OFFSET,
.recalc = &omap1_ckctl_recalc_dsp_domain,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = &omap1_clk_set_rate_dsp_domain,
};
static struct clk dspxor_ck = {
.name = "dspxor_ck",
.ops = &clkops_dspck,
.parent = &ck_ref,
.enable_reg = DSP_IDLECT2,
.enable_bit = EN_XORPCK,
.recalc = &followparent_recalc,
};
static struct clk dsptim_ck = {
.name = "dsptim_ck",
.ops = &clkops_dspck,
.parent = &ck_ref,
.enable_reg = DSP_IDLECT2,
.enable_bit = EN_DSPTIMCK,
.recalc = &followparent_recalc,
};
static struct arm_idlect1_clk tc_ck = {
.clk = {
.name = "tc_ck",
.ops = &clkops_null,
.parent = &ck_dpll1,
.flags = CLOCK_IDLE_CONTROL,
.rate_offset = CKCTL_TCDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
},
.idlect_shift = IDLIF_ARM_SHIFT,
};
static struct clk arminth_ck1510 = {
.name = "arminth_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
/* Note: On 1510 the frequency follows TC_CK
*
* 16xx version is in MPU clocks.
*/
};
static struct clk tipb_ck = {
/* No-idle controlled by "tc_ck" */
.name = "tipb_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
};
static struct clk l3_ocpi_ck = {
/* No-idle controlled by "tc_ck" */
.name = "l3_ocpi_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT3),
.enable_bit = EN_OCPI_CK,
.recalc = &followparent_recalc,
};
static struct clk tc1_ck = {
.name = "tc1_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT3),
.enable_bit = EN_TC1_CK,
.recalc = &followparent_recalc,
};
/*
* FIXME: This clock seems to be necessary but no-one has asked for its
* activation. [ pm.c (SRAM), CCP, Camera ]
*/
static struct clk tc2_ck = {
.name = "tc2_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
.flags = ENABLE_ON_INIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT3),
.enable_bit = EN_TC2_CK,
.recalc = &followparent_recalc,
};
static struct clk dma_ck = {
/* No-idle controlled by "tc_ck" */
.name = "dma_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
};
static struct clk dma_lcdfree_ck = {
.name = "dma_lcdfree_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
};
static struct arm_idlect1_clk api_ck = {
.clk = {
.name = "api_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_APICK,
.recalc = &followparent_recalc,
},
.idlect_shift = IDLAPI_ARM_SHIFT,
};
static struct arm_idlect1_clk lb_ck = {
.clk = {
.name = "lb_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_LBCK,
.recalc = &followparent_recalc,
},
.idlect_shift = IDLLB_ARM_SHIFT,
};
static struct clk rhea1_ck = {
.name = "rhea1_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
};
static struct clk rhea2_ck = {
.name = "rhea2_ck",
.ops = &clkops_null,
.parent = &tc_ck.clk,
.recalc = &followparent_recalc,
};
static struct clk lcd_ck_16xx = {
.name = "lcd_ck",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_LCDCK,
.rate_offset = CKCTL_LCDDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
};
static struct arm_idlect1_clk lcd_ck_1510 = {
.clk = {
.name = "lcd_ck",
.ops = &clkops_generic,
.parent = &ck_dpll1,
.flags = CLOCK_IDLE_CONTROL,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_LCDCK,
.rate_offset = CKCTL_LCDDIV_OFFSET,
.recalc = &omap1_ckctl_recalc,
.round_rate = omap1_clk_round_rate_ckctl_arm,
.set_rate = omap1_clk_set_rate_ckctl_arm,
},
.idlect_shift = OMAP1510_IDLLCD_ARM_SHIFT,
};
/*
* XXX The enable_bit here is misused - it simply switches between 12MHz
* and 48MHz. Reimplement with clksel.
*
* XXX does this need SYSC register handling?
*/
static struct clk uart1_1510 = {
.name = "uart1_ck",
.ops = &clkops_null,
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 12000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_UART1_CLK_MODE_R,
.set_rate = &omap1_set_uart_rate,
.recalc = &omap1_uart_recalc,
};
/*
* XXX The enable_bit here is misused - it simply switches between 12MHz
* and 48MHz. Reimplement with clksel.
*
* XXX SYSC register handling does not belong in the clock framework
*/
static struct uart_clk uart1_16xx = {
.clk = {
.name = "uart1_ck",
.ops = &clkops_uart_16xx,
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 48000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_UART1_CLK_MODE_R,
},
.sysc_addr = 0xfffb0054,
};
/*
* XXX The enable_bit here is misused - it simply switches between 12MHz
* and 48MHz. Reimplement with clksel.
*
* XXX does this need SYSC register handling?
*/
static struct clk uart2_ck = {
.name = "uart2_ck",
.ops = &clkops_null,
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 12000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_UART2_CLK_MODE_R,
.set_rate = &omap1_set_uart_rate,
.recalc = &omap1_uart_recalc,
};
/*
* XXX The enable_bit here is misused - it simply switches between 12MHz
* and 48MHz. Reimplement with clksel.
*
* XXX does this need SYSC register handling?
*/
static struct clk uart3_1510 = {
.name = "uart3_ck",
.ops = &clkops_null,
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 12000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_UART3_CLK_MODE_R,
.set_rate = &omap1_set_uart_rate,
.recalc = &omap1_uart_recalc,
};
/*
* XXX The enable_bit here is misused - it simply switches between 12MHz
* and 48MHz. Reimplement with clksel.
*
* XXX SYSC register handling does not belong in the clock framework
*/
static struct uart_clk uart3_16xx = {
.clk = {
.name = "uart3_ck",
.ops = &clkops_uart_16xx,
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 48000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_UART3_CLK_MODE_R,
},
.sysc_addr = 0xfffb9854,
};
static struct clk usb_clko = { /* 6 MHz output on W4_USB_CLKO */
.name = "usb_clko",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 6000000,
.flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(ULPD_CLOCK_CTRL),
.enable_bit = USB_MCLK_EN_BIT,
};
static struct clk usb_hhc_ck1510 = {
.name = "usb_hhc_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000, /* Actually 2 clocks, 12MHz and 48MHz */
.flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = USB_HOST_HHC_UHOST_EN,
};
static struct clk usb_hhc_ck16xx = {
.name = "usb_hhc_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000,
/* OTG_SYSCON_2.OTG_PADEN == 0 (not 1510-compatible) */
.flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(OTG_BASE + 0x08), /* OTG_SYSCON_2 */
.enable_bit = OTG_SYSCON_2_UHOST_EN_SHIFT
};
static struct clk usb_dc_ck = {
.name = "usb_dc_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = USB_REQ_EN_SHIFT,
};
static struct clk usb_dc_ck7xx = {
.name = "usb_dc_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = SOFT_USB_OTG_DPLL_REQ_SHIFT,
};
static struct clk uart1_7xx = {
.name = "uart1_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 12000000,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 9,
};
static struct clk uart2_7xx = {
.name = "uart2_ck",
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 12000000,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 11,
};
static struct clk mclk_1510 = {
.name = "mclk",
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.rate = 12000000,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = SOFT_COM_MCKO_REQ_SHIFT,
};
static struct clk mclk_16xx = {
.name = "mclk",
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.enable_reg = OMAP1_IO_ADDRESS(COM_CLK_DIV_CTRL_SEL),
.enable_bit = COM_ULPD_PLL_CLK_REQ,
.set_rate = &omap1_set_ext_clk_rate,
.round_rate = &omap1_round_ext_clk_rate,
.init = &omap1_init_ext_clk,
};
static struct clk bclk_1510 = {
.name = "bclk",
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.rate = 12000000,
};
static struct clk bclk_16xx = {
.name = "bclk",
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.enable_reg = OMAP1_IO_ADDRESS(SWD_CLK_DIV_CTRL_SEL),
.enable_bit = SWD_ULPD_PLL_CLK_REQ,
.set_rate = &omap1_set_ext_clk_rate,
.round_rate = &omap1_round_ext_clk_rate,
.init = &omap1_init_ext_clk,
};
static struct clk mmc1_ck = {
.name = "mmc1_ck",
.ops = &clkops_generic,
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = CONF_MOD_MMC_SD_CLK_REQ_R,
};
/*
* XXX MOD_CONF_CTRL_0 bit 20 is defined in the 1510 TRM as
* CONF_MOD_MCBSP3_AUXON ??
*/
static struct clk mmc2_ck = {
.name = "mmc2_ck",
.ops = &clkops_generic,
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = 20,
};
static struct clk mmc3_ck = {
.name = "mmc3_ck",
.ops = &clkops_generic,
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
.flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = SOFT_MMC_DPLL_REQ_SHIFT,
};
static struct clk virtual_ck_mpu = {
.name = "mpu",
.ops = &clkops_null,
.parent = &arm_ck, /* Is smarter alias for */
.recalc = &followparent_recalc,
.set_rate = &omap1_select_table_rate,
.round_rate = &omap1_round_to_table_rate,
};
/* virtual functional clock domain for I2C. Just for making sure that ARMXOR_CK
remains active during MPU idle whenever this is enabled */
static struct clk i2c_fck = {
.name = "i2c_fck",
.ops = &clkops_null,
.flags = CLOCK_NO_IDLE_PARENT,
.parent = &armxor_ck.clk,
.recalc = &followparent_recalc,
};
static struct clk i2c_ick = {
.name = "i2c_ick",
.ops = &clkops_null,
.flags = CLOCK_NO_IDLE_PARENT,
.parent = &armper_ck.clk,
.recalc = &followparent_recalc,
};
/*
* clkdev integration
*/
static struct omap_clk omap_clks[] = {
/* non-ULPD clocks */
CLK(NULL, "ck_ref", &ck_ref, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK(NULL, "ck_dpll1", &ck_dpll1, CK_16XX | CK_1510 | CK_310 | CK_7XX),
/* CK_GEN1 clocks */
CLK(NULL, "ck_dpll1out", &ck_dpll1out.clk, CK_16XX),
CLK(NULL, "ck_sossi", &sossi_ck, CK_16XX),
CLK(NULL, "arm_ck", &arm_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "armper_ck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
CLK("omap_gpio.0", "ick", &arm_gpio_ck, CK_1510 | CK_310),
CLK(NULL, "armxor_ck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK(NULL, "armtim_ck", &armtim_ck.clk, CK_16XX | CK_1510 | CK_310),
CLK("omap_wdt", "fck", &armwdt_ck.clk, CK_16XX | CK_1510 | CK_310),
CLK("omap_wdt", "ick", &armper_ck.clk, CK_16XX),
CLK("omap_wdt", "ick", &dummy_ck, CK_1510 | CK_310),
CLK(NULL, "arminth_ck", &arminth_ck1510, CK_1510 | CK_310),
CLK(NULL, "arminth_ck", &arminth_ck16xx, CK_16XX),
/* CK_GEN2 clocks */
CLK(NULL, "dsp_ck", &dsp_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "dspmmu_ck", &dspmmu_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "dspper_ck", &dspper_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "dspxor_ck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "dsptim_ck", &dsptim_ck, CK_16XX | CK_1510 | CK_310),
/* CK_GEN3 clocks */
CLK(NULL, "tc_ck", &tc_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK(NULL, "tipb_ck", &tipb_ck, CK_1510 | CK_310),
CLK(NULL, "l3_ocpi_ck", &l3_ocpi_ck, CK_16XX | CK_7XX),
CLK(NULL, "tc1_ck", &tc1_ck, CK_16XX),
CLK(NULL, "tc2_ck", &tc2_ck, CK_16XX),
CLK(NULL, "dma_ck", &dma_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "dma_lcdfree_ck", &dma_lcdfree_ck, CK_16XX),
CLK(NULL, "api_ck", &api_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK(NULL, "lb_ck", &lb_ck.clk, CK_1510 | CK_310),
CLK(NULL, "rhea1_ck", &rhea1_ck, CK_16XX),
CLK(NULL, "rhea2_ck", &rhea2_ck, CK_16XX),
CLK(NULL, "lcd_ck", &lcd_ck_16xx, CK_16XX | CK_7XX),
CLK(NULL, "lcd_ck", &lcd_ck_1510.clk, CK_1510 | CK_310),
/* ULPD clocks */
CLK(NULL, "uart1_ck", &uart1_1510, CK_1510 | CK_310),
CLK(NULL, "uart1_ck", &uart1_16xx.clk, CK_16XX),
CLK(NULL, "uart1_ck", &uart1_7xx, CK_7XX),
CLK(NULL, "uart2_ck", &uart2_ck, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "uart2_ck", &uart2_7xx, CK_7XX),
CLK(NULL, "uart3_ck", &uart3_1510, CK_1510 | CK_310),
CLK(NULL, "uart3_ck", &uart3_16xx.clk, CK_16XX),
CLK(NULL, "usb_clko", &usb_clko, CK_16XX | CK_1510 | CK_310),
CLK(NULL, "usb_hhc_ck", &usb_hhc_ck1510, CK_1510 | CK_310),
CLK(NULL, "usb_hhc_ck", &usb_hhc_ck16xx, CK_16XX),
CLK(NULL, "usb_dc_ck", &usb_dc_ck, CK_16XX),
CLK(NULL, "usb_dc_ck", &usb_dc_ck7xx, CK_7XX),
CLK(NULL, "mclk", &mclk_1510, CK_1510 | CK_310),
CLK(NULL, "mclk", &mclk_16xx, CK_16XX),
CLK(NULL, "bclk", &bclk_1510, CK_1510 | CK_310),
CLK(NULL, "bclk", &bclk_16xx, CK_16XX),
CLK("mmci-omap.0", "fck", &mmc1_ck, CK_16XX | CK_1510 | CK_310),
CLK("mmci-omap.0", "fck", &mmc3_ck, CK_7XX),
CLK("mmci-omap.0", "ick", &armper_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK("mmci-omap.1", "fck", &mmc2_ck, CK_16XX),
CLK("mmci-omap.1", "ick", &armper_ck.clk, CK_16XX),
/* Virtual clocks */
CLK(NULL, "mpu", &virtual_ck_mpu, CK_16XX | CK_1510 | CK_310),
CLK("omap_i2c.1", "fck", &i2c_fck, CK_16XX | CK_1510 | CK_310 | CK_7XX),
CLK("omap_i2c.1", "ick", &i2c_ick, CK_16XX),
CLK("omap_i2c.1", "ick", &dummy_ck, CK_1510 | CK_310 | CK_7XX),
CLK("omap1_spi100k.1", "fck", &dummy_ck, CK_7XX),
CLK("omap1_spi100k.1", "ick", &dummy_ck, CK_7XX),
CLK("omap1_spi100k.2", "fck", &dummy_ck, CK_7XX),
CLK("omap1_spi100k.2", "ick", &dummy_ck, CK_7XX),
CLK("omap_uwire", "fck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310),
CLK("omap-mcbsp.1", "ick", &dspper_ck, CK_16XX),
CLK("omap-mcbsp.1", "ick", &dummy_ck, CK_1510 | CK_310),
CLK("omap-mcbsp.2", "ick", &armper_ck.clk, CK_16XX),
CLK("omap-mcbsp.2", "ick", &dummy_ck, CK_1510 | CK_310),
CLK("omap-mcbsp.3", "ick", &dspper_ck, CK_16XX),
CLK("omap-mcbsp.3", "ick", &dummy_ck, CK_1510 | CK_310),
CLK("omap-mcbsp.1", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
CLK("omap-mcbsp.2", "fck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
CLK("omap-mcbsp.3", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
};
/*
* init
*/
static struct clk_functions omap1_clk_functions = {
.clk_enable = omap1_clk_enable,
.clk_disable = omap1_clk_disable,
.clk_round_rate = omap1_clk_round_rate,
.clk_set_rate = omap1_clk_set_rate,
.clk_disable_unused = omap1_clk_disable_unused,
};
static void __init omap1_show_rates(void)
{
pr_notice("Clocking rate (xtal/DPLL1/MPU): "
"%ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n",
ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10,
ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10,
arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10);
}
u32 cpu_mask;
int __init omap1_clk_init(void)
{
struct omap_clk *c;
const struct omap_clock_config *info;
int crystal_type = 0; /* Default 12 MHz */
u32 reg;
#ifdef CONFIG_DEBUG_LL
/*
* Resets some clocks that may be left on from bootloader,
* but leaves serial clocks on.
*/
omap_writel(0x3 << 29, MOD_CONF_CTRL_0);
#endif
/* USB_REQ_EN will be disabled later if necessary (usb_dc_ck) */
reg = omap_readw(SOFT_REQ_REG) & (1 << 4);
omap_writew(reg, SOFT_REQ_REG);
if (!cpu_is_omap15xx())
omap_writew(0, SOFT_REQ_REG2);
clk_init(&omap1_clk_functions);
/* By default all idlect1 clocks are allowed to idle */
arm_idlect1_mask = ~0;
for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
clk_preinit(c->lk.clk);
cpu_mask = 0;
if (cpu_is_omap1710())
cpu_mask |= CK_1710;
if (cpu_is_omap16xx())
cpu_mask |= CK_16XX;
if (cpu_is_omap1510())
cpu_mask |= CK_1510;
if (cpu_is_omap7xx())
cpu_mask |= CK_7XX;
if (cpu_is_omap310())
cpu_mask |= CK_310;
for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
if (c->cpu & cpu_mask) {
clkdev_add(&c->lk);
clk_register(c->lk.clk);
}
/* Pointers to these clocks are needed by code in clock.c */
api_ck_p = clk_get(NULL, "api_ck");
ck_dpll1_p = clk_get(NULL, "ck_dpll1");
ck_ref_p = clk_get(NULL, "ck_ref");
info = omap_get_config(OMAP_TAG_CLOCK, struct omap_clock_config);
if (info != NULL) {
if (!cpu_is_omap15xx())
crystal_type = info->system_clock_type;
}
if (cpu_is_omap7xx())
ck_ref.rate = 13000000;
if (cpu_is_omap16xx() && crystal_type == 2)
ck_ref.rate = 19200000;
pr_info("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: "
"0x%04x\n", omap_readw(ARM_SYSST), omap_readw(DPLL_CTL),
omap_readw(ARM_CKCTL));
/* We want to be in syncronous scalable mode */
omap_writew(0x1000, ARM_SYSST);
/*
* Initially use the values set by bootloader. Determine PLL rate and
* recalculate dependent clocks as if kernel had changed PLL or
* divisors. See also omap1_clk_late_init() that can reprogram dpll1
* after the SRAM is initialized.
*/
{
unsigned pll_ctl_val = omap_readw(DPLL_CTL);
ck_dpll1.rate = ck_ref.rate; /* Base xtal rate */
if (pll_ctl_val & 0x10) {
/* PLL enabled, apply multiplier and divisor */
if (pll_ctl_val & 0xf80)
ck_dpll1.rate *= (pll_ctl_val & 0xf80) >> 7;
ck_dpll1.rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
} else {
/* PLL disabled, apply bypass divisor */
switch (pll_ctl_val & 0xc) {
case 0:
break;
case 0x4:
ck_dpll1.rate /= 2;
break;
default:
ck_dpll1.rate /= 4;
break;
}
}
}
propagate_rate(&ck_dpll1);
/* Cache rates for clocks connected to ck_ref (not dpll1) */
propagate_rate(&ck_ref);
omap1_show_rates();
if (machine_is_omap_perseus2() || machine_is_omap_fsample()) {
/* Select slicer output as OMAP input clock */
omap_writew(omap_readw(OMAP7XX_PCC_UPLD_CTRL) & ~0x1,
OMAP7XX_PCC_UPLD_CTRL);
}
/* Amstrad Delta wants BCLK high when inactive */
if (machine_is_ams_delta())
omap_writel(omap_readl(ULPD_CLOCK_CTRL) |
(1 << SDW_MCLK_INV_BIT),
ULPD_CLOCK_CTRL);
/* Turn off DSP and ARM_TIMXO. Make sure ARM_INTHCK is not divided */
/* (on 730, bit 13 must not be cleared) */
if (cpu_is_omap7xx())
omap_writew(omap_readw(ARM_CKCTL) & 0x2fff, ARM_CKCTL);
else
omap_writew(omap_readw(ARM_CKCTL) & 0x0fff, ARM_CKCTL);
/* Put DSP/MPUI into reset until needed */
omap_writew(0, ARM_RSTCT1);
omap_writew(1, ARM_RSTCT2);
omap_writew(0x400, ARM_IDLECT1);
/*
* According to OMAP5910 Erratum SYS_DMA_1, bit DMACK_REQ (bit 8)
* of the ARM_IDLECT2 register must be set to zero. The power-on
* default value of this bit is one.
*/
omap_writew(0x0000, ARM_IDLECT2); /* Turn LCD clock off also */
/*
* Only enable those clocks we will need, let the drivers
* enable other clocks as necessary
*/
clk_enable(&armper_ck.clk);
clk_enable(&armxor_ck.clk);
clk_enable(&armtim_ck.clk); /* This should be done by timer code */
if (cpu_is_omap15xx())
clk_enable(&arm_gpio_ck);
return 0;
}
#define OMAP1_DPLL1_SANE_VALUE 60000000
void __init omap1_clk_late_init(void)
{
unsigned long rate = ck_dpll1.rate;
/* Find the highest supported frequency and enable it */
if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) {
pr_err("System frequencies not set, using default. Check your config.\n");
/*
* Reprogramming the DPLL is tricky, it must be done from SRAM.
*/
omap_sram_reprogram_clock(0x2290, 0x0005);
ck_dpll1.rate = OMAP1_DPLL1_SANE_VALUE;
}
propagate_rate(&ck_dpll1);
omap1_show_rates();
loops_per_jiffy = cpufreq_scale(loops_per_jiffy, rate, ck_dpll1.rate);
}