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linux/arch/arm/plat-samsung/include/plat/clock.h

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[ARM] S3C24XX: Move headers from plat-s3c24xx to plat-s3c Move clock.h, cpu.h and devs.h to plat-s3c for use with the s3c64xx support. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:43 +02:00
/* linux/arch/arm/plat-s3c/include/plat/clock.h
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
*
* Copyright (c) 2004-2005 Simtec Electronics
* http://www.simtec.co.uk/products/SWLINUX/
* Written by Ben Dooks, <ben@simtec.co.uk>
*
* 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.
*/
[ARM] S3C24XX: Change clock locking to use spinlocks. We cannot sleep if we have cpufreq pm enabled during some of the clock operations, so change to use a spinlock to protect the clock system. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:37 +02:00
#include <linux/spinlock.h>
ARM: SAMSUNG: Add clkdev infrastructure The struct clk definition for Samsung platforms is extended to include a instance of struct clk_lookup and a device name. When clocks are registered using s3c24xx_register_clock function, the dev_id, con_id and clk members are initialized with information from the struct clk instance and struct clk_lookup member is registered. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-06-14 12:12:26 +02:00
#include <linux/clkdev.h>
[ARM] S3C24XX: Change clock locking to use spinlocks. We cannot sleep if we have cpufreq pm enabled during some of the clock operations, so change to use a spinlock to protect the clock system. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:37 +02:00
ARM: SAMSUNG: Reduce size of struct clk. Reduce the size of struct clk by 12 bytes and make defining clocks with common implementation functions easier by moving the set_rate, get_rate, round_rate and set_parent calls into a new structure called 'struct clk_ops' and using that instead. This change does make a few clocks larger as they need their own clk_ops, but this is outweighed by the number of clocks with either no ops or having a common set of ops. Update all the users of this. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-01 02:24:37 +01:00
struct clk;
/**
* struct clk_ops - standard clock operations
* @set_rate: set the clock rate, see clk_set_rate().
* @get_rate: get the clock rate, see clk_get_rate().
* @round_rate: round a given clock rate, see clk_round_rate().
* @set_parent: set the clock's parent, see clk_set_parent().
*
* Group the common clock implementations together so that we
Fix common misspellings Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 03:57:33 +02:00
* don't have to keep setting the same fields again. We leave
ARM: SAMSUNG: Reduce size of struct clk. Reduce the size of struct clk by 12 bytes and make defining clocks with common implementation functions easier by moving the set_rate, get_rate, round_rate and set_parent calls into a new structure called 'struct clk_ops' and using that instead. This change does make a few clocks larger as they need their own clk_ops, but this is outweighed by the number of clocks with either no ops or having a common set of ops. Update all the users of this. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-01 02:24:37 +01:00
* enable in struct clk.
*
* Adding an extra layer of indirection into the process should
* not be a problem as it is unlikely these operations are going
* to need to be called quickly.
*/
struct clk_ops {
int (*set_rate)(struct clk *c, unsigned long rate);
unsigned long (*get_rate)(struct clk *c);
unsigned long (*round_rate)(struct clk *c, unsigned long rate);
int (*set_parent)(struct clk *c, struct clk *parent);
};
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
struct clk {
struct list_head list;
struct module *owner;
struct clk *parent;
const char *name;
ARM: SAMSUNG: Add clkdev infrastructure The struct clk definition for Samsung platforms is extended to include a instance of struct clk_lookup and a device name. When clocks are registered using s3c24xx_register_clock function, the dev_id, con_id and clk members are initialized with information from the struct clk instance and struct clk_lookup member is registered. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-06-14 12:12:26 +02:00
const char *devname;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
int id;
[ARM] 3303/1: S3C24XX - add clock enable usage counting Patch from Ben Dooks Move to using an enable count for the shared clocks and protect the clock system using a mutex instead of just disabling IRQs during the clock update. Since there is little more code in the path for non-shared clocks, the enable and disable calls use the same code for each. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-08 22:09:05 +01:00
int usage;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
unsigned long rate;
unsigned long ctrlbit;
[ARM] 3331/1: S3C24XX - add clk_set_parent() to clock code Patch from Ben Dooks Add clk_set_parent() call to clock code Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-20 18:10:04 +01:00
ARM: SAMSUNG: Reduce size of struct clk. Reduce the size of struct clk by 12 bytes and make defining clocks with common implementation functions easier by moving the set_rate, get_rate, round_rate and set_parent calls into a new structure called 'struct clk_ops' and using that instead. This change does make a few clocks larger as they need their own clk_ops, but this is outweighed by the number of clocks with either no ops or having a common set of ops. Update all the users of this. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-01 02:24:37 +01:00
struct clk_ops *ops;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
int (*enable)(struct clk *, int enable);
ARM: SAMSUNG: Add clkdev infrastructure The struct clk definition for Samsung platforms is extended to include a instance of struct clk_lookup and a device name. When clocks are registered using s3c24xx_register_clock function, the dev_id, con_id and clk members are initialized with information from the struct clk instance and struct clk_lookup member is registered. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-06-14 12:12:26 +02:00
struct clk_lookup lookup;
ARM: SAMSUNG: Add support for clock debugging through debug-fs interface This patch adds support for clock information exposed to debug-fs interface. Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> [kgene.kim@samsung.com: removed useless empty lines] Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-01-12 05:40:04 +01:00
#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
struct dentry *dent; /* For visible tree hierarchy */
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
};
/* other clocks which may be registered by board support */
extern struct clk s3c24xx_dclk0;
extern struct clk s3c24xx_dclk1;
extern struct clk s3c24xx_clkout0;
extern struct clk s3c24xx_clkout1;
extern struct clk s3c24xx_uclk;
[ARM] 3361/1: S3C24XX - add USB bus clock source Patch from Ben Dooks Add USB bus clock definition for 48MHz fed to OHCI and gadget cores Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-20 22:00:48 +01:00
extern struct clk clk_usb_bus;
[ARM] 3627/1: S3C24XX: split s3c2410 clocks from core clocks Patch from Ben Dooks Split the s3c2410 specific clocks from the core clock code, as part of the work to support more of the Samsung line of SoCs. The patch does not use the sysdev mechanism as the clocks are needed for the timer init, which is very early in the kernel init sequence. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-22 23:18:20 +02:00
/* core clock support */
extern struct clk clk_f;
extern struct clk clk_h;
extern struct clk clk_p;
[ARM] 3637/1: S3C24XX: Add mpll clock, and set as fclk parent Patch from Ben Dooks Update the clocks with the MPLL clock, and use it as the parent. Also export these to the rest of arch/arm/mach-s3c2410 Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-24 22:21:29 +02:00
extern struct clk clk_mpll;
[ARM] 3627/1: S3C24XX: split s3c2410 clocks from core clocks Patch from Ben Dooks Split the s3c2410 specific clocks from the core clock code, as part of the work to support more of the Samsung line of SoCs. The patch does not use the sysdev mechanism as the clocks are needed for the timer init, which is very early in the kernel init sequence. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-22 23:18:20 +02:00
extern struct clk clk_upll;
[ARM] S3C64XX: Add initial clock framework Add the initial clocks definitions for the s3c6400 and s3c6410. Move the epll and ext clock from the s3c2443 support into the common code. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:07:00 +02:00
extern struct clk clk_epll;
[ARM] 3637/1: S3C24XX: Add mpll clock, and set as fclk parent Patch from Ben Dooks Update the clocks with the MPLL clock, and use it as the parent. Also export these to the rest of arch/arm/mach-s3c2410 Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-24 22:21:29 +02:00
extern struct clk clk_xtal;
[ARM] S3C64XX: Add initial clock framework Add the initial clocks definitions for the s3c6400 and s3c6410. Move the epll and ext clock from the s3c2443 support into the common code. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:07:00 +02:00
extern struct clk clk_ext;
/* S3C64XX specific clocks */
[ARM] S3C64XX: Add HCLKx2 Add doubled HCLK to S3C64xx. Signed-off-by: Werner Almesberger <werner@openmoko.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-03-05 04:43:13 +01:00
extern struct clk clk_h2;
[ARM] S3C64XX: Add initial clock framework Add the initial clocks definitions for the s3c6400 and s3c6410. Move the epll and ext clock from the s3c2443 support into the common code. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:07:00 +02:00
extern struct clk clk_27m;
extern struct clk clk_48m;
ARM: S3C64XX: Add USB external clock definition This adds the xusbxti clock to S3C64XX platform. Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-17 20:17:42 +02:00
extern struct clk clk_xusbxti;
[ARM] 3627/1: S3C24XX: split s3c2410 clocks from core clocks Patch from Ben Dooks Split the s3c2410 specific clocks from the core clock code, as part of the work to support more of the Samsung line of SoCs. The patch does not use the sysdev mechanism as the clocks are needed for the timer init, which is very early in the kernel init sequence. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-22 23:18:20 +02:00
ARM: SAMSUNG: Make clk_default_setrate and clk_ops_def_setrate visible This patch makes clk_default_setrate and clk_ops_def_setrate available to code outside plat-samsung clock code. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-01-14 04:50:23 +01:00
extern int clk_default_setrate(struct clk *clk, unsigned long rate);
extern struct clk_ops clk_ops_def_setrate;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
/* exports for arch/arm/mach-s3c2410
*
* Please DO NOT use these outside of arch/arm/mach-s3c2410
*/
[ARM] S3C24XX: Change clock locking to use spinlocks. We cannot sleep if we have cpufreq pm enabled during some of the clock operations, so change to use a spinlock to protect the clock system. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:37 +02:00
extern spinlock_t clocks_lock;
[ARM] 3361/1: S3C24XX - add USB bus clock source Patch from Ben Dooks Add USB bus clock definition for 48MHz fed to OHCI and gadget cores Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-20 22:00:48 +01:00
[ARM] 3627/1: S3C24XX: split s3c2410 clocks from core clocks Patch from Ben Dooks Split the s3c2410 specific clocks from the core clock code, as part of the work to support more of the Samsung line of SoCs. The patch does not use the sysdev mechanism as the clocks are needed for the timer init, which is very early in the kernel init sequence. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-22 23:18:20 +02:00
extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
extern int s3c24xx_register_clock(struct clk *clk);
[ARM] 4324/1: S3C24XX: remove clocks from s3c24xx_board Remove the clocks from the s3c24xx_board as part of the process of simplifying the initialisation sequence by removing struct s3c24xx_board. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-04-20 12:15:27 +02:00
extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 00:20:36 +02:00
ARM: SAMSUNG: Add call to register array of clocks Add s3c_register_clocks() to register an array of clocks, printing an error message if there is a problem. Replace all points in the code where this could be used. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-01-05 17:21:38 +01:00
extern void s3c_register_clocks(struct clk *clk, int nr_clks);
ARM: SAMSUNG: Add s3c_disable_clocks() and tidy init+disable usage Add s3c_disable_clocks() and change the clock registration code to use the s3c_register_clocks() followed by s3c_disable_clocks() instead of the loops it was using. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-28 05:58:13 +02:00
extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
ARM: SAMSUNG: Add call to register array of clocks Add s3c_register_clocks() to register an array of clocks, printing an error message if there is a problem. Replace all points in the code where this could be used. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-01-05 17:21:38 +01:00
[ARM] S3C24XX: Update clock data on resume Update the clock settings on resume for suspend/resume support so that if the boot loader changes anything or the system's PLL is reset then we return with the correct settings. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:38 +02:00
extern int s3c24xx_register_baseclocks(unsigned long xtal);
ARM: S5P6440: Add Clock and PLL support This patch adds clock and pll support for S5P6440. This patch are based on Harald Welte's patches and Ben's plat-samsung. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-01-14 00:13:37 +01:00
extern void s5p_register_clocks(unsigned long xtal_freq);
[ARM] S3C64XX: Add initial clock framework Add the initial clocks definitions for the s3c6400 and s3c6410. Move the epll and ext clock from the s3c2443 support into the common code. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:07:00 +02:00
[ARM] S3C24XX: Update clock data on resume Update the clock settings on resume for suspend/resume support so that if the boot loader changes anything or the system's PLL is reset then we return with the correct settings. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:06:38 +02:00
extern void s3c24xx_setup_clocks(unsigned long fclk,
unsigned long hclk,
unsigned long pclk);
extern void s3c2410_setup_clocks(void);
extern void s3c2412_setup_clocks(void);
extern void s3c244x_setup_clocks(void);
extern void s3c2443_setup_clocks(void);
[ARM] S3C64XX: Clock support for S3C6400/S3C6410 Add the PLL clock initialisation and clock registration and include the clocks sourced via CLKDIVx for most of the on-chip peripherals. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-10-21 15:07:02 +02:00
/* S3C64XX specific functions and clocks */
extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
[ARM] S3C: Update time initialisation to fix S3C64XX time problems The S3C64XX timer is running at the wrong rate due to the assumptions made in the timer initialisation about the way the pwm dividers work. This means that time on the S3C64XX runs twice as fast as it should. Fix the problem by moving to using the clk framework to setup the pwm timer clock muxes, as the pwm-clock code has all the necessary knowledge of how the timer clock inputs are routed. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-11-21 11:36:05 +01:00
/* Init for pwm clock code */
extern void s3c_pwmclk_init(void);