aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch')
-rw-r--r--target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch832
1 files changed, 832 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch b/target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch
new file mode 100644
index 0000000000..a0647aa268
--- /dev/null
+++ b/target/linux/s3c24xx/patches-2.6.31/003-s3c-pwm.patch
@@ -0,0 +1,832 @@
+From 4b35af38b03658e6031fdca45c98e488d6cf3f34 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Tue, 21 Jul 2009 12:06:29 +0200
+Subject: [PATCH] 011-s3c-pwm.patch
+
+---
+ arch/arm/plat-s3c/Kconfig | 5 +
+ arch/arm/plat-s3c/Makefile | 1 +
+ arch/arm/plat-s3c/include/plat/pwm.h | 45 ++++
+ arch/arm/plat-s3c/pwm.c | 288 ++++++++++++++++++++++
+ arch/arm/plat-s3c24xx/pwm-clock.c | 437 ++++++++++++++++++++++++++++++++++
+ 5 files changed, 776 insertions(+), 0 deletions(-)
+ create mode 100644 arch/arm/plat-s3c/include/plat/pwm.h
+ create mode 100644 arch/arm/plat-s3c/pwm.c
+ create mode 100644 arch/arm/plat-s3c24xx/pwm-clock.c
+
+diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
+index 935c755..bae4b95 100644
+--- a/arch/arm/plat-s3c/Kconfig
++++ b/arch/arm/plat-s3c/Kconfig
+@@ -166,6 +166,11 @@ config S3C_DMA
+ help
+ Internal configuration for S3C DMA core
+
++config S3C_PWM
++ bool
++ help
++ PWM timer code for the S3C2410, and similar processors
++
+ # device definitions to compile in
+
+ config S3C_DEV_HSMMC
+diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
+index f32f183..ab60855 100644
+--- a/arch/arm/plat-s3c/Makefile
++++ b/arch/arm/plat-s3c/Makefile
+@@ -38,3 +38,4 @@ obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += dev-audio.o
+ obj-$(CONFIG_S3C_DEV_FB) += dev-fb.o
+ obj-$(CONFIG_S3C_DEV_USB_HOST) += dev-usb.o
+ obj-$(CONFIG_S3C_DEV_USB_HSOTG) += dev-usb-hsotg.o
++obj-$(CONFIG_S3C_PWM) += pwm.o
+diff --git a/arch/arm/plat-s3c/include/plat/pwm.h b/arch/arm/plat-s3c/include/plat/pwm.h
+new file mode 100644
+index 0000000..6a41b0a
+--- /dev/null
++++ b/arch/arm/plat-s3c/include/plat/pwm.h
+@@ -0,0 +1,45 @@
++#ifndef __S3C2410_PWM_H
++#define __S3C2410_PWM_H
++
++#include <linux/err.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++
++#include <mach/io.h>
++#include <mach/hardware.h>
++#include <asm/mach-types.h>
++#include <plat/regs-timer.h>
++
++enum pwm_timer {
++ PWM0,
++ PWM1,
++ PWM2,
++ PWM3,
++ PWM4
++};
++
++struct s3c2410_pwm {
++ enum pwm_timer timerid;
++ struct clk *pclk;
++ unsigned long pclk_rate;
++ unsigned long prescaler;
++ unsigned long divider;
++ unsigned long counter;
++ unsigned long comparer;
++};
++
++struct s3c24xx_pwm_platform_data{
++ /* callback to attach platform children (to enforce suspend / resume
++ * ordering */
++ void (*attach_child_devices)(struct device *parent_device);
++};
++
++int s3c2410_pwm_init(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_enable(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_disable(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_start(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_stop(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_duty_cycle(int reg_value, struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_dumpregs(void);
++
++#endif /* __S3C2410_PWM_H */
+diff --git a/arch/arm/plat-s3c/pwm.c b/arch/arm/plat-s3c/pwm.c
+new file mode 100644
+index 0000000..250bd2b
+--- /dev/null
++++ b/arch/arm/plat-s3c/pwm.c
+@@ -0,0 +1,288 @@
++/*
++ * arch/arm/plat-s3c/pwm.c
++ *
++ * Copyright (c) by Javi Roman <javiroman@kernel-labs.org>
++ * for the Openmoko Project.
++ *
++ * S3C2410A SoC PWM support
++ *
++ * 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; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/clk.h>
++#include <linux/device.h>
++#include <mach/hardware.h>
++#include <plat/regs-timer.h>
++#include <plat/pwm.h>
++#include <asm/io.h>
++
++#ifdef CONFIG_PM
++ static unsigned long standby_reg_tcon;
++ static unsigned long standby_reg_tcfg0;
++ static unsigned long standby_reg_tcfg1;
++#endif
++
++int s3c2410_pwm_disable(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ /* stop timer */
++ tcon = __raw_readl(S3C2410_TCON);
++ tcon &= 0xffffff00;
++ __raw_writel(tcon, S3C2410_TCON);
++
++ clk_disable(pwm->pclk);
++ clk_put(pwm->pclk);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_disable);
++
++int s3c2410_pwm_init(struct s3c2410_pwm *pwm)
++{
++ pwm->pclk = clk_get(NULL, "timers");
++ if (IS_ERR(pwm->pclk))
++ return PTR_ERR(pwm->pclk);
++
++ clk_enable(pwm->pclk);
++ pwm->pclk_rate = clk_get_rate(pwm->pclk);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_init);
++
++int s3c2410_pwm_enable(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcfg0, tcfg1, tcnt, tcmp;
++
++ /* control registers bits */
++ tcfg1 = __raw_readl(S3C2410_TCFG1);
++ tcfg0 = __raw_readl(S3C2410_TCFG0);
++
++ /* divider & scaler slection */
++ switch (pwm->timerid) {
++ case PWM0:
++ tcfg1 &= ~S3C2410_TCFG1_MUX0_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK;
++ break;
++ case PWM1:
++ tcfg1 &= ~S3C2410_TCFG1_MUX1_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK;
++ break;
++ case PWM2:
++ tcfg1 &= ~S3C2410_TCFG1_MUX2_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
++ break;
++ case PWM3:
++ tcfg1 &= ~S3C2410_TCFG1_MUX3_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ break;
++ default:
++ clk_disable(pwm->pclk);
++ clk_put(pwm->pclk);
++ return -1;
++ }
++
++ /* divider & scaler values */
++ tcfg1 |= pwm->divider;
++ __raw_writel(tcfg1, S3C2410_TCFG1);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ case PWM1:
++ tcfg0 |= pwm->prescaler;
++ __raw_writel(tcfg0, S3C2410_TCFG0);
++ break;
++ default:
++ if ((tcfg0 | pwm->prescaler) != tcfg0) {
++ printk(KERN_WARNING "not changing prescaler of PWM %u,"
++ " since it's shared with timer4 (clock tick)\n",
++ pwm->timerid);
++ }
++ break;
++ }
++
++ /* timer count and compare buffer initial values */
++ tcnt = pwm->counter;
++ tcmp = pwm->comparer;
++
++ __raw_writel(tcnt, S3C2410_TCNTB(pwm->timerid));
++ __raw_writel(tcmp, S3C2410_TCMPB(pwm->timerid));
++
++ /* ensure timer is stopped */
++ s3c2410_pwm_stop(pwm);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_enable);
++
++int s3c2410_pwm_start(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ tcon = __raw_readl(S3C2410_TCON);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ tcon |= S3C2410_TCON_T0START;
++ tcon &= ~S3C2410_TCON_T0MANUALUPD;
++ break;
++ case PWM1:
++ tcon |= S3C2410_TCON_T1START;
++ tcon &= ~S3C2410_TCON_T1MANUALUPD;
++ break;
++ case PWM2:
++ tcon |= S3C2410_TCON_T2START;
++ tcon &= ~S3C2410_TCON_T2MANUALUPD;
++ break;
++ case PWM3:
++ tcon |= S3C2410_TCON_T3START;
++ tcon &= ~S3C2410_TCON_T3MANUALUPD;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ default:
++ return -ENODEV;
++ }
++
++ __raw_writel(tcon, S3C2410_TCON);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_start);
++
++int s3c2410_pwm_stop(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ tcon = __raw_readl(S3C2410_TCON);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ tcon &= ~0x00000000;
++ tcon |= S3C2410_TCON_T0RELOAD;
++ tcon |= S3C2410_TCON_T0MANUALUPD;
++ break;
++ case PWM1:
++ tcon &= ~0x00000080;
++ tcon |= S3C2410_TCON_T1RELOAD;
++ tcon |= S3C2410_TCON_T1MANUALUPD;
++ break;
++ case PWM2:
++ tcon &= ~0x00000800;
++ tcon |= S3C2410_TCON_T2RELOAD;
++ tcon |= S3C2410_TCON_T2MANUALUPD;
++ break;
++ case PWM3:
++ tcon &= ~0x00008000;
++ tcon |= S3C2410_TCON_T3RELOAD;
++ tcon |= S3C2410_TCON_T3MANUALUPD;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ default:
++ return -ENODEV;
++ }
++
++ __raw_writel(tcon, S3C2410_TCON);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_stop);
++
++int s3c2410_pwm_duty_cycle(int reg_value, struct s3c2410_pwm *pwm)
++{
++ __raw_writel(reg_value, S3C2410_TCMPB(pwm->timerid));
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_duty_cycle);
++
++int s3c2410_pwm_dumpregs(void)
++{
++ printk(KERN_INFO "TCON: %08lx, TCFG0: %08lx, TCFG1: %08lx\n",
++ (unsigned long) __raw_readl(S3C2410_TCON),
++ (unsigned long) __raw_readl(S3C2410_TCFG0),
++ (unsigned long) __raw_readl(S3C2410_TCFG1));
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_dumpregs);
++
++static int __init s3c24xx_pwm_probe(struct platform_device *pdev)
++{
++ struct s3c24xx_pwm_platform_data *pdata = pdev->dev.platform_data;
++
++ dev_info(&pdev->dev, "s3c24xx_pwm is registered \n");
++
++ /* if platform was interested, give him a chance to register
++ * platform devices that switch power with us as the parent
++ * at registration time -- ensures suspend / resume ordering
++ */
++ if (pdata)
++ if (pdata->attach_child_devices)
++ (pdata->attach_child_devices)(&pdev->dev);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM
++static int s3c24xx_pwm_suspend(struct platform_device *pdev, pm_message_t state)
++{
++ /* PWM config should be kept in suspending */
++ standby_reg_tcon = __raw_readl(S3C2410_TCON);
++ standby_reg_tcfg0 = __raw_readl(S3C2410_TCFG0);
++ standby_reg_tcfg1 = __raw_readl(S3C2410_TCFG1);
++
++ return 0;
++}
++
++static int s3c24xx_pwm_resume(struct platform_device *pdev)
++{
++ __raw_writel(standby_reg_tcon, S3C2410_TCON);
++ __raw_writel(standby_reg_tcfg0, S3C2410_TCFG0);
++ __raw_writel(standby_reg_tcfg1, S3C2410_TCFG1);
++
++ return 0;
++}
++#else
++#define s3c24xx_pwm_suspend NULL
++#define s3c24xx_pwm_resume NULL
++#endif
++
++static struct platform_driver s3c24xx_pwm_driver = {
++ .driver = {
++ .name = "s3c24xx_pwm",
++ .owner = THIS_MODULE,
++ },
++ .probe = s3c24xx_pwm_probe,
++ .suspend = s3c24xx_pwm_suspend,
++ .resume = s3c24xx_pwm_resume,
++};
++
++static int __init s3c24xx_pwm_init(void)
++{
++ return platform_driver_register(&s3c24xx_pwm_driver);
++}
++
++static void __exit s3c24xx_pwm_exit(void)
++{
++}
++
++MODULE_AUTHOR("Javi Roman <javiroman@kernel-labs.org>");
++MODULE_LICENSE("GPL");
++
++module_init(s3c24xx_pwm_init);
++module_exit(s3c24xx_pwm_exit);
+diff --git a/arch/arm/plat-s3c24xx/pwm-clock.c b/arch/arm/plat-s3c24xx/pwm-clock.c
+new file mode 100644
+index 0000000..d41cccd
+--- /dev/null
++++ b/arch/arm/plat-s3c24xx/pwm-clock.c
+@@ -0,0 +1,437 @@
++/* linux/arch/arm/plat-s3c24xx/pwm-clock.c
++ *
++ * Copyright (c) 2007 Simtec Electronics
++ * Copyright (c) 2007, 2008 Ben Dooks
++ * Ben Dooks <ben-linux@fluff.org>
++ *
++ * 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; either version 2 of the License.
++*/
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/list.h>
++#include <linux/errno.h>
++#include <linux/clk.h>
++#include <linux/err.h>
++#include <linux/io.h>
++
++#include <mach/hardware.h>
++#include <asm/irq.h>
++
++#include <mach/regs-clock.h>
++#include <mach/regs-gpio.h>
++
++#include <asm/plat-s3c24xx/clock.h>
++#include <asm/plat-s3c24xx/cpu.h>
++
++#include <asm/plat-s3c/regs-timer.h>
++
++/* Each of the timers 0 through 5 go through the following
++ * clock tree, with the inputs depending on the timers.
++ *
++ * pclk ---- [ prescaler 0 ] -+---> timer 0
++ * +---> timer 1
++ *
++ * pclk ---- [ prescaler 1 ] -+---> timer 2
++ * +---> timer 3
++ * \---> timer 4
++ *
++ * Which are fed into the timers as so:
++ *
++ * prescaled 0 ---- [ div 2,4,8,16 ] ---\
++ * [mux] -> timer 0
++ * tclk 0 ------------------------------/
++ *
++ * prescaled 0 ---- [ div 2,4,8,16 ] ---\
++ * [mux] -> timer 1
++ * tclk 0 ------------------------------/
++ *
++ *
++ * prescaled 1 ---- [ div 2,4,8,16 ] ---\
++ * [mux] -> timer 2
++ * tclk 1 ------------------------------/
++ *
++ * prescaled 1 ---- [ div 2,4,8,16 ] ---\
++ * [mux] -> timer 3
++ * tclk 1 ------------------------------/
++ *
++ * prescaled 1 ---- [ div 2,4,8, 16 ] --\
++ * [mux] -> timer 4
++ * tclk 1 ------------------------------/
++ *
++ * Since the mux and the divider are tied together in the
++ * same register space, it is impossible to set the parent
++ * and the rate at the same time. To avoid this, we add an
++ * intermediate 'prescaled-and-divided' clock to select
++ * as the parent for the timer input clock called tdiv.
++ *
++ * prescaled clk --> pwm-tdiv ---\
++ * [ mux ] --> timer X
++ * tclk -------------------------/
++*/
++
++static unsigned long clk_pwm_scaler_getrate(struct clk *clk)
++{
++ unsigned long tcfg0 = __raw_readl(S3C2410_TCFG0);
++
++ if (clk->id == 1) {
++ tcfg0 &= S3C2410_TCFG_PRESCALER1_MASK;
++ tcfg0 >>= S3C2410_TCFG_PRESCALER1_SHIFT;
++ } else {
++ tcfg0 &= S3C2410_TCFG_PRESCALER0_MASK;
++ }
++
++ return clk_get_rate(clk->parent) / (tcfg0 + 1);
++}
++
++/* TODO - add set rate calls. */
++
++static struct clk clk_timer_scaler[] = {
++ [0] = {
++ .name = "pwm-scaler0",
++ .id = -1,
++ .get_rate = clk_pwm_scaler_getrate,
++ },
++ [1] = {
++ .name = "pwm-scaler1",
++ .id = -1,
++ .get_rate = clk_pwm_scaler_getrate,
++ },
++};
++
++static struct clk clk_timer_tclk[] = {
++ [0] = {
++ .name = "pwm-tclk0",
++ .id = -1,
++ },
++ [1] = {
++ .name = "pwm-tclk1",
++ .id = -1,
++ },
++};
++
++struct pwm_tdiv_clk {
++ struct clk clk;
++ unsigned int divisor;
++};
++
++static inline struct pwm_tdiv_clk *to_tdiv(struct clk *clk)
++{
++ return container_of(clk, struct pwm_tdiv_clk, clk);
++}
++
++static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
++{
++ return 1 << (1 + tcfg1);
++}
++
++static unsigned long clk_pwm_tdiv_get_rate(struct clk *clk)
++{
++ unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
++ unsigned int divisor;
++
++ tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
++ tcfg1 &= S3C2410_TCFG1_MUX_MASK;
++
++ if (tcfg1 == S3C2410_TCFG1_MUX_TCLK)
++ divisor = to_tdiv(clk)->divisor;
++ else
++ divisor = tcfg_to_divisor(tcfg1);
++
++ return clk_get_rate(clk->parent) / divisor;
++}
++
++static unsigned long clk_pwm_tdiv_round_rate(struct clk *clk,
++ unsigned long rate)
++{
++ unsigned long parent_rate;
++ unsigned long divisor;
++
++ parent_rate = clk_get_rate(clk->parent);
++ divisor = parent_rate / rate;
++
++ if (divisor <= 2)
++ divisor = 2;
++ else if (divisor <= 4)
++ divisor = 4;
++ else if (divisor <= 8)
++ divisor = 8;
++ else
++ divisor = 16;
++
++ return parent_rate / divisor;
++}
++
++static unsigned long clk_pwm_tdiv_bits(struct pwm_tdiv_clk *divclk)
++{
++ unsigned long bits;
++
++ switch (divclk->divisor) {
++ case 2:
++ bits = S3C2410_TCFG1_MUX_DIV2;
++ break;
++ case 4:
++ bits = S3C2410_TCFG1_MUX_DIV4;
++ break;
++ case 8:
++ bits = S3C2410_TCFG1_MUX_DIV8;
++ break;
++ case 16:
++ default:
++ bits = S3C2410_TCFG1_MUX_DIV16;
++ break;
++ }
++
++ return bits;
++}
++
++static void clk_pwm_tdiv_update(struct pwm_tdiv_clk *divclk)
++{
++ unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
++ unsigned long bits = clk_pwm_tdiv_bits(divclk);
++ unsigned long flags;
++ unsigned long shift = S3C2410_TCFG1_SHIFT(divclk->clk.id);
++
++ local_irq_save(flags);
++
++ tcfg1 = __raw_readl(S3C2410_TCFG1);
++ tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
++ tcfg1 |= bits << shift;
++ __raw_writel(tcfg1, S3C2410_TCFG1);
++
++ local_irq_restore(flags);
++}
++
++static int clk_pwm_tdiv_set_rate(struct clk *clk, unsigned long rate)
++{
++ struct pwm_tdiv_clk *divclk = to_tdiv(clk);
++ unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
++ unsigned long parent_rate = clk_get_rate(clk->parent);
++ unsigned long divisor;
++
++ tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
++ tcfg1 &= S3C2410_TCFG1_MUX_MASK;
++
++ rate = clk_round_rate(clk, rate);
++ divisor = parent_rate / rate;
++
++ if (divisor > 16)
++ return -EINVAL;
++
++ divclk->divisor = divisor;
++
++ /* Update the current MUX settings if we are currently
++ * selected as the clock source for this clock. */
++
++ if (tcfg1 != S3C2410_TCFG1_MUX_TCLK)
++ clk_pwm_tdiv_update(divclk);
++
++ return 0;
++}
++
++static struct pwm_tdiv_clk clk_timer_tdiv[] = {
++ [0] = {
++ .clk = {
++ .name = "pwm-tdiv",
++ .parent = &clk_timer_scaler[0],
++ .get_rate = clk_pwm_tdiv_get_rate,
++ .set_rate = clk_pwm_tdiv_set_rate,
++ .round_rate = clk_pwm_tdiv_round_rate,
++ },
++ },
++ [1] = {
++ .clk = {
++ .name = "pwm-tdiv",
++ .parent = &clk_timer_scaler[0],
++ .get_rate = clk_pwm_tdiv_get_rate,
++ .set_rate = clk_pwm_tdiv_set_rate,
++ .round_rate = clk_pwm_tdiv_round_rate,
++ }
++ },
++ [2] = {
++ .clk = {
++ .name = "pwm-tdiv",
++ .parent = &clk_timer_scaler[1],
++ .get_rate = clk_pwm_tdiv_get_rate,
++ .set_rate = clk_pwm_tdiv_set_rate,
++ .round_rate = clk_pwm_tdiv_round_rate,
++ },
++ },
++ [3] = {
++ .clk = {
++ .name = "pwm-tdiv",
++ .parent = &clk_timer_scaler[1],
++ .get_rate = clk_pwm_tdiv_get_rate,
++ .set_rate = clk_pwm_tdiv_set_rate,
++ .round_rate = clk_pwm_tdiv_round_rate,
++ },
++ },
++ [4] = {
++ .clk = {
++ .name = "pwm-tdiv",
++ .parent = &clk_timer_scaler[1],
++ .get_rate = clk_pwm_tdiv_get_rate,
++ .set_rate = clk_pwm_tdiv_set_rate,
++ .round_rate = clk_pwm_tdiv_round_rate,
++ },
++ },
++};
++
++static int __init clk_pwm_tdiv_register(unsigned int id)
++{
++ struct pwm_tdiv_clk *divclk = &clk_timer_tdiv[id];
++ unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
++
++ tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
++ tcfg1 &= S3C2410_TCFG1_MUX_MASK;
++
++ divclk->clk.id = id;
++ divclk->divisor = tcfg_to_divisor(tcfg1);
++
++ return s3c24xx_register_clock(&divclk->clk);
++}
++
++static inline struct clk *s3c24xx_pwmclk_tclk(unsigned int id)
++{
++ return (id >= 2) ? &clk_timer_tclk[1] : &clk_timer_tclk[0];
++}
++
++static inline struct clk *s3c24xx_pwmclk_tdiv(unsigned int id)
++{
++ return &clk_timer_tdiv[id].clk;
++}
++
++static int clk_pwm_tin_set_parent(struct clk *clk, struct clk *parent)
++{
++ unsigned int id = clk->id;
++ unsigned long tcfg1;
++ unsigned long flags;
++ unsigned long bits;
++ unsigned long shift = S3C2410_TCFG1_SHIFT(id);
++
++ if (parent == s3c24xx_pwmclk_tclk(id))
++ bits = S3C2410_TCFG1_MUX_TCLK << shift;
++ else if (parent == s3c24xx_pwmclk_tdiv(id))
++ bits = clk_pwm_tdiv_bits(to_tdiv(parent)) << shift;
++ else
++ return -EINVAL;
++
++ clk->parent = parent;
++
++ local_irq_save(flags);
++
++ tcfg1 = __raw_readl(S3C2410_TCFG1);
++ tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
++ __raw_writel(tcfg1 | bits, S3C2410_TCFG1);
++
++ local_irq_restore(flags);
++
++ return 0;
++}
++
++static struct clk clk_tin[] = {
++ [0] = {
++ .name = "pwm-tin",
++ .id = 0,
++ .set_parent = clk_pwm_tin_set_parent,
++ },
++ [1] = {
++ .name = "pwm-tin",
++ .id = 1,
++ .set_parent = clk_pwm_tin_set_parent,
++ },
++ [2] = {
++ .name = "pwm-tin",
++ .id = 2,
++ .set_parent = clk_pwm_tin_set_parent,
++ },
++ [3] = {
++ .name = "pwm-tin",
++ .id = 3,
++ .set_parent = clk_pwm_tin_set_parent,
++ },
++ [4] = {
++ .name = "pwm-tin",
++ .id = 4,
++ .set_parent = clk_pwm_tin_set_parent,
++ },
++};
++
++static __init int clk_pwm_tin_register(struct clk *pwm)
++{
++ unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
++ unsigned int id = pwm->id;
++
++ struct clk *parent;
++ int ret;
++
++ ret = s3c24xx_register_clock(pwm);
++ if (ret < 0)
++ return ret;
++
++ tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
++ tcfg1 &= S3C2410_TCFG1_MUX_MASK;
++
++ if (tcfg1 == S3C2410_TCFG1_MUX_TCLK)
++ parent = s3c24xx_pwmclk_tclk(id);
++ else
++ parent = s3c24xx_pwmclk_tdiv(id);
++
++ return clk_set_parent(pwm, parent);
++}
++
++static __init int s3c24xx_pwmclk_init(void)
++{
++ struct clk *clk_timers;
++ unsigned int clk;
++ int ret;
++
++ clk_timers = clk_get(NULL, "timers");
++ if (IS_ERR(clk_timers)) {
++ printk(KERN_ERR "%s: no parent clock\n", __func__);
++ return -EINVAL;
++ }
++
++ for (clk = 0; clk < ARRAY_SIZE(clk_timer_scaler); clk++) {
++ clk_timer_scaler[clk].parent = clk_timers;
++ ret = s3c24xx_register_clock(&clk_timer_scaler[clk]);
++ if (ret < 0) {
++ printk(KERN_ERR "error adding pwm scaler%d clock\n", clk);
++ goto err;
++ }
++ }
++
++ for (clk = 0; clk < ARRAY_SIZE(clk_timer_tclk); clk++) {
++ ret = s3c24xx_register_clock(&clk_timer_tclk[clk]);
++ if (ret < 0) {
++ printk(KERN_ERR "error adding pww tclk%d\n", clk);
++ goto err;
++ }
++ }
++
++ for (clk = 0; clk < ARRAY_SIZE(clk_timer_tdiv); clk++) {
++ ret = clk_pwm_tdiv_register(clk);
++ if (ret < 0) {
++ printk(KERN_ERR "error adding pwm%d tdiv clock\n", clk);
++ goto err;
++ }
++ }
++
++ for (clk = 0; clk < ARRAY_SIZE(clk_tin); clk++) {
++ ret = clk_pwm_tin_register(&clk_tin[clk]);
++ if (ret < 0) {
++ printk(KERN_ERR "error adding pwm%d tin clock\n", clk);
++ goto err;
++ }
++ }
++
++ return 0;
++
++ err:
++ return ret;
++}
++
++arch_initcall(s3c24xx_pwmclk_init);
+--
+1.5.6.5
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 00:36:16 +0000