linux-ea3250: New recipe

This is a kernel recipe for the LPC32XX (LPC3250) based Embedded Artists
development board. It uses public patches provided by NXP and Embedded
Artists. The other two patches provide drivers for the PWM capabilities
and fix one NXP patch.

It can be generalized for use with the PHYTEC LPC3250 development board.

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>

1 files changed, 227 insertions, 0 deletions

diff --git a/recipes/linux/linux-ea3250-2.6.27.8/lpc32xx-spwm.patch b/recipes/linux/linux-ea3250-2.6.27.8/lpc32xx-spwm.patch
new file mode 100644
index 0000000000..64e9fff1eb
--- /dev/null
+++ b/recipes/linux/linux-ea3250-2.6.27.8/lpc32xx-spwm.patch
@@ -0,0 +1,227 @@
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/arch-lpc32xx.c linux-2.6.27.8-new/arch/arm/mach-lpc32xx/arch-lpc32xx.c
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/arch-lpc32xx.c	2009-11-24 15:42:39.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/arch-lpc32xx.c	2009-11-24 15:52:40.000000000 +0100
+@@ -342,6 +342,9 @@
+ 	tmp |= UART_UART6_IRDAMOD_BYPASS;
+ #endif
+ 	__raw_writel(tmp, UARTCTL_CTRL(io_p2v(UART_CTRL_BASE)));
++#if defined(CONFIG_SPWM_LPC32XX)
++	lpc32xx_spwm_init();
++#endif
+ }
+ 
+ static struct map_desc lpc32xx_io_desc[] __initdata = {
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/include/mach/lpc32xx_pwm.h linux-2.6.27.8-new/arch/arm/mach-lpc32xx/include/mach/lpc32xx_pwm.h
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/include/mach/lpc32xx_pwm.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/include/mach/lpc32xx_pwm.h	2009-11-24 15:54:09.000000000 +0100
+@@ -0,0 +1,31 @@
++/*
++ *  linux/arch/arm/mach-lpc32xx/include/mach/lpc32xx_pwm.h
++ *
++ *  Copyright (C) 2009 Fontys University of Applied Sciences, Eindhoven
++ *                     Laurens Timmermans <l.timmermans@fontys.nl>
++ *
++ * 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.
++ *
++ * 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.
++ *
++ * 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
++ */
++
++#ifndef LPC32XX_PWM_H
++#define LPC32XX_PWM_H
++
++#define PWM1	0
++#define PWM2	1
++
++#define RTC_CLK		0x00
++#define PERIPH_CLK	0x01
++
++#endif
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/Kconfig linux-2.6.27.8-new/arch/arm/mach-lpc32xx/Kconfig
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/Kconfig	2009-11-24 15:42:39.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/Kconfig	2009-11-24 16:01:16.000000000 +0100
+@@ -185,6 +185,12 @@
+ 	  which support is selected, the ethernet interface driver needs to be
+ 	  selected in the device driver networking section.
+ 
++config SPWM_LPC32XX
++	bool "SPWM"
++	default FALSE
++	help
++	  Enable simple-PWM support
++
+ menu "Standard UARTS"
+ 
+ config MACH_LPC32XX_UART5_ENABLE
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/Makefile linux-2.6.27.8-new/arch/arm/mach-lpc32xx/Makefile
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/Makefile	2009-11-24 15:42:39.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/Makefile	2009-11-24 16:01:39.000000000 +0100
+@@ -7,6 +7,7 @@
+ obj-y				:= timer-lpc32xx.o irq-lpc32xx.o arch-lpc32xx.o
+ obj-y				+= serial-lpc32xx.o clocks-lpc32xx.o
+ obj-y				+= dma-lpc32xx.o uid-lpc32xx.o
++obj-y				+= spwm-lpc32xx.o
+ obj-m				:= 
+ obj-n				:=
+ obj-				:=
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/spwm-lpc32xx.c linux-2.6.27.8-new/arch/arm/mach-lpc32xx/spwm-lpc32xx.c
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/spwm-lpc32xx.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/spwm-lpc32xx.c	2009-11-24 16:07:20.000000000 +0100
+@@ -0,0 +1,126 @@
++/*
++ *  linux/arch/arm/mach-lpc32xx/spwm-lpc32xx.c
++ *
++ *  Copyright (C) 2009 Fontys University of Applied Sciences, Eindhoven
++ *                     Laurens Timmermans <l.timmermans@fontys.nl>
++ *
++ * 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.
++ *
++ * 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.
++ *
++ * 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/module.h>
++#include <linux/kernel.h>
++
++#include <mach/lpc32xx_clkpwr.h>
++#include <mach/lpc32xx_pwm.h>
++#include "sys-lpc32xx.h"
++
++#define MAX_PWM			1
++
++/* sets bits in w at position x of width y to value z */
++#define _BITS(w,x,y,z) (w = (w & ~(((0x01 << y)-1) << ((x+1)-y))) | ((z & ((0x01 << y)-1)) << ((x+1)-y)))
++
++#define PWM_IOBASE(x)	io_p2v(PWM1_BASE + (x*4))
++
++void lpc32xx_spwm_enable(u32 ch)
++{
++	u32 pwm_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	pwm_ctrl = __raw_readl(PWM_IOBASE(ch));
++	_BITS(pwm_ctrl, 31, 0x01, 0x01);
++	__raw_writel(pwm_ctrl, PWM_IOBASE(ch));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_enable);
++
++void lpc32xx_spwm_disable(u32 ch)
++{
++	u32 pwm_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	pwm_ctrl = __raw_readl(PWM_IOBASE(ch));
++	_BITS(pwm_ctrl, 31, 0x01, 0x00);
++	__raw_writel(pwm_ctrl, PWM_IOBASE(ch));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_disable);
++
++void lpc32xx_spwm_set_dutycycle(u32 ch, u32 dutycycle)
++{
++	u32 pwm_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	pwm_ctrl = __raw_readl(PWM_IOBASE(ch));
++	_BITS(pwm_ctrl, 0x07, 0x08, dutycycle);
++	__raw_writel(pwm_ctrl, PWM_IOBASE(ch));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_set_dutycycle);
++
++void lpc32xx_spwm_set_reloadv(u32 ch, u32 reloadv)
++{
++	u32 pwm_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	pwm_ctrl = __raw_readl(PWM_IOBASE(ch));
++	_BITS(pwm_ctrl, 0x0F, 0x08, reloadv);
++	__raw_writel(pwm_ctrl, PWM_IOBASE(ch));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_set_reloadv);
++
++void lpc32xx_spwm_set_clocksource(u32 ch, u32 clk)
++{
++	u32 clk_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	clk_ctrl = __raw_readl(CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++	_BITS(clk_ctrl, (ch*2 + 1), 0x01, clk);
++	__raw_writel(clk_ctrl, CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_set_clocksource);
++
++void lpc32xx_spwm_set_clockdiv(u32 ch, u32 div)
++{
++	u32 clk_ctrl;
++
++	if(ch > MAX_PWM)
++		return;
++
++	clk_ctrl = __raw_readl(CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++	_BITS(clk_ctrl, (ch*4 + 7), 0x04, div);
++	__raw_writel(clk_ctrl, CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++}
++EXPORT_SYMBOL(lpc32xx_spwm_set_clockdiv);
++
++void __init lpc32xx_spwm_init(void)
++{
++	u32 clk_ctrl;
++
++	/* enable the clock */
++	clk_ctrl = __raw_readl(CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++	clk_ctrl |= (0x05);
++	__raw_writel(clk_ctrl, CLKPWR_PWM_CLK_CTRL(CLKPWR_IOBASE));
++
++	/* initially set clockdiv to 1 */
++	lpc32xx_spwm_set_clockdiv(PWM1, 1);
++	lpc32xx_spwm_set_clockdiv(PWM2, 1);
++}
+diff -Naur -X linux/Documentation/dontdiff linux-2.6.27.8/arch/arm/mach-lpc32xx/sys-lpc32xx.h linux-2.6.27.8-new/arch/arm/mach-lpc32xx/sys-lpc32xx.h
+--- linux-2.6.27.8/arch/arm/mach-lpc32xx/sys-lpc32xx.h	2009-11-24 15:42:39.000000000 +0100
++++ linux-2.6.27.8-new/arch/arm/mach-lpc32xx/sys-lpc32xx.h	2009-11-24 16:08:24.000000000 +0100
+@@ -83,14 +83,17 @@
+ #endif
+ 
+ /* Chip specific structures and functions */
+-extern struct platform_device serial_std_platform_device;
+-extern struct platform_device serial_hspd_platform_device;
++extern struct platform_device serial_std_platform_device;
++extern struct platform_device serial_hspd_platform_device;
+ extern struct sys_timer lpc32xx_timer;
+ extern void lpc32xx_init_irq (void);
+ extern void serial_init(void);
+ extern void __init lpc32xx_init (void);
+ extern void __init lpc32xx_map_io(void);
+ extern int __init clk_init(void);
++#if defined(CONFIG_SPWM_LPC32XX)
++extern void lpc32xx_spwm_init(void);
++#endif
+ 
+ #endif