u-boot/arch/arm/include/asm/arch-omap3/clock.h
Michael Trimarchi f33b9bd398 arm: omap3: Enable clocks for peripherals only if they are used
This patch change the per_clocks_enable() function used in OMAP3
code to enable peripherals clocks. Only required clock should be
activated. So if the board use the uart(x) as a console we need
to activate it. The Board's config should include define to enable
every subsystem that the board use. For a complete list
of affected peripherals, registers CM_FCLKEN_PER and CM_ICLKEN_PER
should be checked.
Right now the bootloader can enable and disable clocks for:
uart(x) using CONFIG_SYS_NS16550
gpio bank (x) using CONFIG_OMAP3_GPIO_X with X = { 2, 3, 4, 5, 6 }
i2c bus using CONFIG_DRIVER_OMAP34XX_I2C.

Not required gptimer(x) and mcbsp(x) for booting are disabled by default and
are not supported by any define.
Their activation need to included in the per_clocks_enable if the
peripheral is included. Not booting board should enable the peripheral
clock connected to their driver

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Tom Rini <trini@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
2013-12-06 07:02:32 -05:00

64 lines
1.5 KiB
C

/*
* (C) Copyright 2006-2008
* Texas Instruments, <www.ti.com>
* Richard Woodruff <r-woodruff2@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _CLOCKS_H_
#define _CLOCKS_H_
#define LDELAY 12000000
#define S12M 12000000
#define S13M 13000000
#define S19_2M 19200000
#define S24M 24000000
#define S26M 26000000
#define S38_4M 38400000
#define FCK_IVA2_ON 0x00000001
#define FCK_CORE1_ON 0x03fffe29
#define ICK_CORE1_ON 0x3ffffffb
#define ICK_CORE2_ON 0x0000001f
#define FCK_WKUP_ON 0x000000e9
#define ICK_WKUP_ON 0x0000003f
#define FCK_DSS_ON 0x00000005
#define ICK_DSS_ON 0x00000001
#define FCK_CAM_ON 0x00000001
#define ICK_CAM_ON 0x00000001
/* Used to index into DPLL parameter tables */
typedef struct {
unsigned int m;
unsigned int n;
unsigned int fsel;
unsigned int m2;
} dpll_param;
struct dpll_per_36x_param {
unsigned int sys_clk;
unsigned int m;
unsigned int n;
unsigned int m2;
unsigned int m3;
unsigned int m4;
unsigned int m5;
unsigned int m6;
unsigned int m2div;
};
/* Following functions are exported from lowlevel_init.S */
extern dpll_param *get_mpu_dpll_param(void);
extern dpll_param *get_iva_dpll_param(void);
extern dpll_param *get_core_dpll_param(void);
extern dpll_param *get_per_dpll_param(void);
extern dpll_param *get_per2_dpll_param(void);
extern dpll_param *get_36x_mpu_dpll_param(void);
extern dpll_param *get_36x_iva_dpll_param(void);
extern dpll_param *get_36x_core_dpll_param(void);
extern dpll_param *get_36x_per_dpll_param(void);
extern dpll_param *get_36x_per2_dpll_param(void);
#endif