From 59b559d7a39b590aecef583af58d123ff5876570 Mon Sep 17 00:00:00 2001 From: Srinidhi Kasagar Date: Thu, 12 Nov 2009 06:20:54 +0100 Subject: [PATCH] ARM: 5786/1: Introduce plat-nomadik, MTU code re-organization Introduce the plat-nomadik folder for ST-Ericsson machines including the existing nomadik 8815 architecture. This also moves the existing MTU (MultiTimerUnit) of nomadik 8815 to the proposed plat-nomadik and adds HAS_MTU. The patch has been re-based to 2.6.32-rc6 Signed-off-by: srinidhi kasagar Acked-by: Alessandro Rubini Signed-off-by: Russell King --- arch/arm/Kconfig | 1 + arch/arm/Makefile | 1 + arch/arm/mach-nomadik/Kconfig | 2 +- arch/arm/mach-nomadik/Makefile | 2 +- arch/arm/mach-nomadik/board-nhk8815.c | 27 ++++++++++++++ arch/arm/mach-nomadik/include/mach/setup.h | 2 +- arch/arm/plat-nomadik/Kconfig | 22 ++++++++++++ arch/arm/plat-nomadik/Makefile | 5 +++ .../mach => plat-nomadik/include/plat}/mtu.h | 9 +++-- .../{mach-nomadik => plat-nomadik}/timer.c | 35 +++++-------------- 10 files changed, 74 insertions(+), 32 deletions(-) create mode 100644 arch/arm/plat-nomadik/Kconfig create mode 100644 arch/arm/plat-nomadik/Makefile rename arch/arm/{mach-nomadik/include/mach => plat-nomadik/include/plat}/mtu.h (90%) rename arch/arm/{mach-nomadik => plat-nomadik}/timer.c (81%) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 1c4119c60040..76cd466ad48c 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -787,6 +787,7 @@ source "arch/arm/mach-at91/Kconfig" source "arch/arm/plat-mxc/Kconfig" source "arch/arm/mach-nomadik/Kconfig" +source "arch/arm/plat-nomadik/Kconfig" source "arch/arm/mach-netx/Kconfig" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index a73caaf66763..1bee36fa5fb1 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -176,6 +176,7 @@ machine-$(CONFIG_ARCH_MXC91231) := mxc91231 plat-$(CONFIG_ARCH_MXC) := mxc plat-$(CONFIG_ARCH_OMAP) := omap plat-$(CONFIG_PLAT_IOP) := iop +plat-$(CONFIG_PLAT_NOMADIK) := nomadik plat-$(CONFIG_PLAT_ORION) := orion plat-$(CONFIG_PLAT_PXA) := pxa plat-$(CONFIG_PLAT_S3C24XX) := s3c24xx s3c diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig index 2a02b49c40f0..3c5e0f522e9c 100644 --- a/arch/arm/mach-nomadik/Kconfig +++ b/arch/arm/mach-nomadik/Kconfig @@ -5,13 +5,13 @@ menu "Nomadik boards" config MACH_NOMADIK_8815NHK bool "ST 8815 Nomadik Hardware Kit (evaluation board)" select NOMADIK_8815 + select HAS_MTU endmenu config NOMADIK_8815 bool - config I2C_BITBANG_8815NHK tristate "Driver for bit-bang busses found on the 8815 NHK" depends on I2C && MACH_NOMADIK_8815NHK diff --git a/arch/arm/mach-nomadik/Makefile b/arch/arm/mach-nomadik/Makefile index 412040982a40..36f67fb207d2 100644 --- a/arch/arm/mach-nomadik/Makefile +++ b/arch/arm/mach-nomadik/Makefile @@ -7,7 +7,7 @@ # Object file lists. -obj-y += clock.o timer.o gpio.o +obj-y += clock.o gpio.o # Cpu revision obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o diff --git a/arch/arm/mach-nomadik/board-nhk8815.c b/arch/arm/mach-nomadik/board-nhk8815.c index 6bfd537d5afb..116394484e71 100644 --- a/arch/arm/mach-nomadik/board-nhk8815.c +++ b/arch/arm/mach-nomadik/board-nhk8815.c @@ -25,11 +25,18 @@ #include #include #include + +#include + #include #include #include #include "clock.h" +/* Initial value for SRC control register: all timers use MXTAL/8 source */ +#define SRC_CR_INIT_MASK 0x00007fff +#define SRC_CR_INIT_VAL 0x2aaa8000 + /* These adresses span 16MB, so use three individual pages */ static struct resource nhk8815_nand_resources[] = { { @@ -239,6 +246,26 @@ static struct platform_device *nhk8815_platform_devices[] __initdata = { /* will add more devices */ }; +static void __init nomadik_timer_init(void) +{ + u32 src_cr; + + /* Configure timer sources in "system reset controller" ctrl reg */ + src_cr = readl(io_p2v(NOMADIK_SRC_BASE)); + src_cr &= SRC_CR_INIT_MASK; + src_cr |= SRC_CR_INIT_VAL; + writel(src_cr, io_p2v(NOMADIK_SRC_BASE)); + + /* Save global pointer to mtu, used by platform timer code */ + mtu_base = io_p2v(NOMADIK_MTU0_BASE); + + nmdk_timer_init(); +} + +static struct sys_timer nomadik_timer = { + .init = nomadik_timer_init, +}; + static void __init nhk8815_platform_init(void) { int i; diff --git a/arch/arm/mach-nomadik/include/mach/setup.h b/arch/arm/mach-nomadik/include/mach/setup.h index a4e468cf63da..b7897edf1f35 100644 --- a/arch/arm/mach-nomadik/include/mach/setup.h +++ b/arch/arm/mach-nomadik/include/mach/setup.h @@ -15,7 +15,7 @@ extern void cpu8815_map_io(void); extern void cpu8815_platform_init(void); extern void cpu8815_init_irq(void); -extern struct sys_timer nomadik_timer; +extern void nmdk_timer_init(void); #endif /* NOMADIK_8815 */ diff --git a/arch/arm/plat-nomadik/Kconfig b/arch/arm/plat-nomadik/Kconfig new file mode 100644 index 000000000000..e27ee3134056 --- /dev/null +++ b/arch/arm/plat-nomadik/Kconfig @@ -0,0 +1,22 @@ +# We keep common IP's here for Nomadik and other similar +# familiy of processors from ST-Ericsson. At the moment we have +# just MTU, others to follow soon. + +config PLAT_NOMADIK + bool + depends on ARCH_NOMADIK + default y + help + Common platform code for Nomadik and other ST-Ericsson + platforms. + +if PLAT_NOMADIK + +config HAS_MTU + bool + help + Support for Multi Timer Unit. MTU provides access + to multiple interrupt generating programmable + 32-bit free running decrementing counters. + +endif diff --git a/arch/arm/plat-nomadik/Makefile b/arch/arm/plat-nomadik/Makefile new file mode 100644 index 000000000000..37c7cdd0f8f0 --- /dev/null +++ b/arch/arm/plat-nomadik/Makefile @@ -0,0 +1,5 @@ +# arch/arm/plat-nomadik/Makefile +# Copyright 2009 ST-Ericsson +# Licensed under GPLv2 + +obj-$(CONFIG_HAS_MTU) += timer.o diff --git a/arch/arm/mach-nomadik/include/mach/mtu.h b/arch/arm/plat-nomadik/include/plat/mtu.h similarity index 90% rename from arch/arm/mach-nomadik/include/mach/mtu.h rename to arch/arm/plat-nomadik/include/plat/mtu.h index 76da7f085330..42c907258b14 100644 --- a/arch/arm/mach-nomadik/include/mach/mtu.h +++ b/arch/arm/plat-nomadik/include/plat/mtu.h @@ -1,5 +1,8 @@ -#ifndef __ASM_ARCH_MTU_H -#define __ASM_ARCH_MTU_H +#ifndef __PLAT_MTU_H +#define __PLAT_MTU_H + +/* should be set by the platform code */ +extern void __iomem *mtu_base; /* * The MTU device hosts four different counters, with 4 set of @@ -41,5 +44,5 @@ #define MTU_PCELL2 0xff8 #define MTU_PCELL3 0xffC -#endif /* __ASM_ARCH_MTU_H */ +#endif /* __PLAT_MTU_H */ diff --git a/arch/arm/mach-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c similarity index 81% rename from arch/arm/mach-nomadik/timer.c rename to arch/arm/plat-nomadik/timer.c index d1738e7061d4..62f18ad43a28 100644 --- a/arch/arm/mach-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -15,19 +15,14 @@ #include #include #include -#include -#define TIMER_CTRL 0x80 /* No divisor */ -#define TIMER_PERIODIC 0x40 -#define TIMER_SZ32BIT 0x02 - -/* Initial value for SRC control register: all timers use MXTAL/8 source */ -#define SRC_CR_INIT_MASK 0x00007fff -#define SRC_CR_INIT_VAL 0x2aaa8000 +#include static u32 nmdk_count; /* accumulated count */ static u32 nmdk_cycle; /* write-once */ -static __iomem void *mtu_base; + +/* setup by the platform code */ +void __iomem *mtu_base; /* * clocksource: the MTU device is a decrementing counters, so we negate @@ -93,7 +88,7 @@ static struct clock_event_device nmdk_clkevt = { static irqreturn_t nmdk_timer_interrupt(int irq, void *dev_id) { /* ack: "interrupt clear register" */ - writel( 1 << 0, mtu_base + MTU_ICR); + writel(1 << 0, mtu_base + MTU_ICR); /* we can't count lost ticks, unfortunately */ nmdk_count += nmdk_cycle; @@ -125,24 +120,14 @@ static void nmdk_timer_reset(void) writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0)); } -static void __init nmdk_timer_init(void) +void __init nmdk_timer_init(void) { - u32 src_cr; unsigned long rate; int bits; rate = CLOCK_TICK_RATE; /* 2.4MHz */ nmdk_cycle = (rate + HZ/2) / HZ; - /* Configure timer sources in "system reset controller" ctrl reg */ - src_cr = readl(io_p2v(NOMADIK_SRC_BASE)); - src_cr &= SRC_CR_INIT_MASK; - src_cr |= SRC_CR_INIT_VAL; - writel(src_cr, io_p2v(NOMADIK_SRC_BASE)); - - /* Save global pointer to mtu, used by functions above */ - mtu_base = io_p2v(NOMADIK_MTU0_BASE); - /* Init the timer and register clocksource */ nmdk_timer_reset(); @@ -150,7 +135,9 @@ static void __init nmdk_timer_init(void) bits = 8*sizeof(nmdk_count); nmdk_clksrc.mask = CLOCKSOURCE_MASK(bits); - clocksource_register(&nmdk_clksrc); + if (clocksource_register(&nmdk_clksrc)) + printk(KERN_ERR "timer: failed to initialize clock " + "source %s\n", nmdk_clksrc.name); /* Register irq and clockevents */ setup_irq(IRQ_MTU0, &nmdk_timer_irq); @@ -158,7 +145,3 @@ static void __init nmdk_timer_init(void) nmdk_clkevt.cpumask = cpumask_of(0); clockevents_register_device(&nmdk_clkevt); } - -struct sys_timer nomadik_timer = { - .init = nmdk_timer_init, -}; -- 2.34.1