[PATCH 4/6] arm: add Nomadik 8815 SoC support
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Tue Aug 3 21:43:57 EDT 2010
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
Cc: Andrea GALLO <andrea.gallo at stericsson.com>
Cc: Gael SALLES <gael.salles at stericsson.com>
---
arch/arm/Kconfig | 7 ++
arch/arm/Makefile | 1 +
arch/arm/mach-nomadik/8815.c | 76 +++++++++++++++++++++
arch/arm/mach-nomadik/Kconfig | 11 +++
arch/arm/mach-nomadik/Makefile | 3 +
arch/arm/mach-nomadik/clock.c | 52 ++++++++++++++
arch/arm/mach-nomadik/clock.h | 14 ++++
arch/arm/mach-nomadik/include/mach/board.h | 28 ++++++++
arch/arm/mach-nomadik/include/mach/clkdev.h | 7 ++
arch/arm/mach-nomadik/include/mach/fsmc.h | 28 ++++++++
arch/arm/mach-nomadik/include/mach/hardware.h | 91 +++++++++++++++++++++++++
arch/arm/mach-nomadik/include/mach/mtu.h | 46 +++++++++++++
arch/arm/mach-nomadik/include/mach/timex.h | 6 ++
arch/arm/mach-nomadik/reset.c | 36 ++++++++++
arch/arm/mach-nomadik/timer.c | 81 ++++++++++++++++++++++
15 files changed, 487 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-nomadik/8815.c
create mode 100644 arch/arm/mach-nomadik/Kconfig
create mode 100644 arch/arm/mach-nomadik/Makefile
create mode 100644 arch/arm/mach-nomadik/clock.c
create mode 100644 arch/arm/mach-nomadik/clock.h
create mode 100644 arch/arm/mach-nomadik/include/mach/board.h
create mode 100644 arch/arm/mach-nomadik/include/mach/clkdev.h
create mode 100644 arch/arm/mach-nomadik/include/mach/fsmc.h
create mode 100644 arch/arm/mach-nomadik/include/mach/hardware.h
create mode 100644 arch/arm/mach-nomadik/include/mach/mtu.h
create mode 100644 arch/arm/mach-nomadik/include/mach/timex.h
create mode 100644 arch/arm/mach-nomadik/reset.c
create mode 100644 arch/arm/mach-nomadik/timer.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 53b7783..82dbfda 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -47,6 +47,12 @@ config ARCH_NETX
bool "Hilscher NetX based"
select CPU_ARM926T
+config ARCH_NOMADIK
+ bool "STMicroelectronics Nomadik"
+ select CPU_ARM926T
+ help
+ Support for the Nomadik platform by ST-Ericsson
+
config ARCH_OMAP
bool "TI OMAP"
@@ -63,6 +69,7 @@ source arch/arm/mach-at91rm9200/Kconfig
source arch/arm/mach-ep93xx/Kconfig
source arch/arm/mach-imx/Kconfig
source arch/arm/mach-netx/Kconfig
+source arch/arm/mach-nomadik/Kconfig
source arch/arm/mach-omap/Kconfig
source arch/arm/mach-s3c24xx/Kconfig
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index bd78259..4d6a76d 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -42,6 +42,7 @@ machine-$(CONFIG_ARCH_AT91) := at91
machine-$(CONFIG_ARCH_AT91RM9200) := at91rm9200
machine-$(CONFIG_ARCH_EP93XX) := ep93xx
machine-$(CONFIG_ARCH_IMX) := imx
+machine-$(CONFIG_ARCH_NOMADIK) := nomadik
machine-$(CONFIG_ARCH_NETX) := netx
machine-$(CONFIG_ARCH_OMAP) := omap
machine-$(CONFIG_ARCH_S3C24xx) := s3c24xx
diff --git a/arch/arm/mach-nomadik/8815.c b/arch/arm/mach-nomadik/8815.c
new file mode 100644
index 0000000..8598f14
--- /dev/null
+++ b/arch/arm/mach-nomadik/8815.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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 <common.h>
+#include <init.h>
+#include <asm/hardware.h>
+#include <mach/hardware.h>
+#include <asm/armlinux.h>
+#include <asm/mach-types.h>
+
+#include "clock.h"
+
+static struct clk st8815_clk_48 = {
+ .rate = 48 * 1000 * 1000,
+};
+
+static struct memory_platform_data ram_pdata = {
+ .name = "ram0",
+ .flags = DEVFS_RDWR,
+};
+
+static struct device_d sdram_dev = {
+ .name = "mem",
+ .map_base = 0x00000000,
+ .platform_data = &ram_pdata,
+};
+
+void st8815_add_device_sdram(u32 size)
+{
+ sdram_dev.size = size;
+ register_device(&sdram_dev);
+ armlinux_add_dram(&sdram_dev);
+}
+
+static struct device_d uart0_serial_device = {
+ .name = "uart-pl011",
+ .map_base = NOMADIK_UART0_BASE,
+ .size = 4096,
+};
+
+static struct device_d uart1_serial_device = {
+ .name = "uart-pl011",
+ .map_base = NOMADIK_UART1_BASE,
+ .size = 4096,
+};
+
+void st8815_register_uart(unsigned id)
+{
+ switch (id) {
+ case 0:
+ nmdk_clk_create(&st8815_clk_48, uart0_serial_device.name);
+ register_device(&uart0_serial_device);
+ break;
+ case 1:
+ nmdk_clk_create(&st8815_clk_48, uart1_serial_device.name);
+ register_device(&uart1_serial_device);
+ break;
+ }
+}
diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig
new file mode 100644
index 0000000..4cf3f7b
--- /dev/null
+++ b/arch/arm/mach-nomadik/Kconfig
@@ -0,0 +1,11 @@
+if ARCH_NOMADIK
+
+choice
+ prompt "Nomadik boards"
+
+endchoice
+
+config NOMADIK_8815
+ bool
+
+endif
diff --git a/arch/arm/mach-nomadik/Makefile b/arch/arm/mach-nomadik/Makefile
new file mode 100644
index 0000000..1d77c4c
--- /dev/null
+++ b/arch/arm/mach-nomadik/Makefile
@@ -0,0 +1,3 @@
+
+obj-y += clock.o reset.o timer.o
+obj-y += 8815.o
diff --git a/arch/arm/mach-nomadik/clock.c b/arch/arm/mach-nomadik/clock.c
new file mode 100644
index 0000000..c74e0c1
--- /dev/null
+++ b/arch/arm/mach-nomadik/clock.c
@@ -0,0 +1,52 @@
+/*
+ * linux/arch/arm/mach-nomadik/clock.c
+ *
+ * Copyright (C) 2009 Alessandro Rubini
+ */
+#include <common.h>
+#include <errno.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <init.h>
+#include <asm/clkdev.h>
+
+#include "clock.h"
+
+/*
+ * The nomadik board uses generic clocks, but the serial pl011 file
+ * calls clk_enable(), clk_disable(), clk_get_rate(), so we provide them
+ */
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+/* enable and disable do nothing */
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+int __clk_get(struct clk *clk)
+{
+ return 1;
+}
+
+/* Create a clock structure with the given name */
+int nmdk_clk_create(struct clk *clk, const char *dev_id)
+{
+ struct clk_lookup *clkdev;
+
+ clkdev = clkdev_alloc(clk, NULL, dev_id);
+ if (!clkdev)
+ return -ENOMEM;
+ clkdev_add(clkdev);
+ return 0;
+}
diff --git a/arch/arm/mach-nomadik/clock.h b/arch/arm/mach-nomadik/clock.h
new file mode 100644
index 0000000..eade4a6
--- /dev/null
+++ b/arch/arm/mach-nomadik/clock.h
@@ -0,0 +1,14 @@
+/*
+ * linux/arch/arm/mach-nomadik/clock.h
+ *
+ * Copyright (C) 2009 Alessandro Rubini
+ *
+ * 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.
+ */
+struct clk {
+ unsigned long rate;
+};
+
+int nmdk_clk_create(struct clk *clk, const char *dev_id);
diff --git a/arch/arm/mach-nomadik/include/mach/board.h b/arch/arm/mach-nomadik/include/mach/board.h
new file mode 100644
index 0000000..b4979fe
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/board.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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 __ASM_ARCH_BOARD_H
+#define __ASM_ARCH_BOARD_H
+
+void st8815_add_device_sdram(u32 size);
+
+void st8815_register_uart(unsigned id);
+
+#endif
diff --git a/arch/arm/mach-nomadik/include/mach/clkdev.h b/arch/arm/mach-nomadik/include/mach/clkdev.h
new file mode 100644
index 0000000..04b37a8
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
diff --git a/arch/arm/mach-nomadik/include/mach/fsmc.h b/arch/arm/mach-nomadik/include/mach/fsmc.h
new file mode 100644
index 0000000..e010c72
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/fsmc.h
@@ -0,0 +1,28 @@
+/* Definitions for the Nomadik FSMC "Flexible Static Memory controller" */
+
+#ifndef __ASM_ARCH_FSMC_H
+#define __ASM_ARCH_FSMC_H
+
+#include <mach/hardware.h>
+/*
+ * Register list
+ */
+
+/* bus control reg. and bus timing reg. for CS0..CS3 */
+#define FSMC_BCR(x) (NOMADIK_FSMC_VA + (x << 3))
+#define FSMC_BTR(x) (NOMADIK_FSMC_VA + (x << 3) + 0x04)
+
+/* PC-card and NAND:
+ * PCR = control register
+ * PMEM = memory timing
+ * PATT = attribute timing
+ * PIO = I/O timing
+ * PECCR = ECC result
+ */
+#define FSMC_PCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x00)
+#define FSMC_PMEM(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x08)
+#define FSMC_PATT(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x0c)
+#define FSMC_PIO(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x10)
+#define FSMC_PECCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x14)
+
+#endif /* __ASM_ARCH_FSMC_H */
diff --git a/arch/arm/mach-nomadik/include/mach/hardware.h b/arch/arm/mach-nomadik/include/mach/hardware.h
new file mode 100644
index 0000000..0f9bd95
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/hardware.h
@@ -0,0 +1,91 @@
+/*
+ * This file contains the hardware definitions of the Nomadik.
+ *
+ * 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 __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+/* Nomadik registers live from 0x1000.0000 to 0x1023.0000 -- currently */
+#define NOMADIK_IO_VIRTUAL 0xF0000000 /* VA of IO */
+#define NOMADIK_IO_PHYSICAL 0x10000000 /* PA of IO */
+#define NOMADIK_IO_SIZE 0x00300000 /* 3MB for all regs */
+
+#ifndef CONFIG_MMU
+#define io_p2v(x) (x)
+#define io_v2p(x) (x)
+#else
+#define io_p2v(x) ((x) - NOMADIK_IO_PHYSICAL + NOMADIK_IO_VIRTUAL)
+#define io_v2p(x) ((x) - NOMADIK_IO_VIRTUAL + NOMADIK_IO_PHYSICAL)
+#endif
+
+#define IO_ADDRESS(x) (io_p2v(x)) /* used in asm and more */
+
+/*
+ * Base address defination for Nomadik Onchip Logic Block
+ */
+#define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
+#define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
+#define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
+#define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
+#define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
+#define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
+#define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
+#define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
+#define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
+#define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
+#define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
+#define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
+#define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
+#define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
+#define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
+#define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
+#define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
+#define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
+#define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
+#define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
+#define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
+#define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
+#define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
+#define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
+#define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
+#define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
+#define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
+#define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
+#define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
+#define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
+#define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
+#define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
+#define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
+#define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
+#define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
+#define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
+#define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
+#define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
+#define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
+#define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
+
+/* Other ranges, not for p2v/v2p */
+#define NOMADIK_BACKUP_RAM 0x80010000
+#define NOMADIK_EBROM 0x80000000 /* Embedded boot ROM */
+#define NOMADIK_HAMACV_DMEM_BASE 0xA0100000 /* HAMACV Data Memory Start */
+#define NOMADIK_HAMACV_DMEM_END 0xA01FFFFF /* HAMACV Data Memory End */
+#define NOMADIK_HAMACA_DMEM 0xA0200000 /* HAMACA Data Memory Space */
+
+#define NOMADIK_FSMC_VA IO_ADDRESS(NOMADIK_FSMC_BASE)
+#define NOMADIK_MTU0_VA IO_ADDRESS(NOMADIK_MTU0_BASE)
+#define NOMADIK_MTU1_VA IO_ADDRESS(NOMADIK_MTU1_BASE)
+
+#endif /* __ASM_ARCH_HARDWARE_H */
diff --git a/arch/arm/mach-nomadik/include/mach/mtu.h b/arch/arm/mach-nomadik/include/mach/mtu.h
new file mode 100644
index 0000000..9095d86
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/mtu.h
@@ -0,0 +1,46 @@
+#ifndef __ASM_ARCH_MTU_H
+#define __ASM_ARCH_MTU_H
+
+/*
+ * The MTU device hosts four different counters, with 4 set of
+ * registers. These are register names.
+ */
+
+#define MTU_IMSC 0x00 /* Interrupt mask set/clear */
+#define MTU_RIS 0x04 /* Raw interrupt status */
+#define MTU_MIS 0x08 /* Masked interrupt status */
+#define MTU_ICR 0x0C /* Interrupt clear register */
+
+/* per-timer registers take 0..3 as argument */
+#define MTU_LR(x) (0x10 + 0x10 * (x) + 0x00) /* Load value */
+#define MTU_VAL(x) (0x10 + 0x10 * (x) + 0x04) /* Current value */
+
+#define MTU_CR(x) (0x10 + 0x10 * (x) + 0x08) /* Control reg */
+#define MTU_BGLR(x) (0x10 + 0x10 * (x) + 0x0c) /* At next overflow */
+
+
+/* bits for the control register */
+#define MTU_CRn_ENA 0x80
+#define MTU_CRn_PERIODIC 0x40 /* if 0 = free-running */
+#define MTU_CRn_PRESCALE_MASK 0x0c
+#define MTU_CRn_PRESCALE_1 0x00
+#define MTU_CRn_PRESCALE_16 0x04
+#define MTU_CRn_PRESCALE_256 0x08
+#define MTU_CRn_32BITS 0x02
+#define MTU_CRn_ONESHOT 0x01 /* if 0 = wraps reloading from BGLR*/
+
+/* Other registers are usual amba/primecell registers, currently not used */
+#define MTU_ITCR 0xff0
+#define MTU_ITOP 0xff4
+
+#define MTU_PERIPH_ID0 0xfe0
+#define MTU_PERIPH_ID1 0xfe4
+#define MTU_PERIPH_ID2 0xfe8
+#define MTU_PERIPH_ID3 0xfeC
+
+#define MTU_PCELL0 0xff0
+#define MTU_PCELL1 0xff4
+#define MTU_PCELL2 0xff8
+#define MTU_PCELL3 0xffC
+
+#endif /* __ASM_ARCH_MTU_H */
diff --git a/arch/arm/mach-nomadik/include/mach/timex.h b/arch/arm/mach-nomadik/include/mach/timex.h
new file mode 100644
index 0000000..b2b41fa
--- /dev/null
+++ b/arch/arm/mach-nomadik/include/mach/timex.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_ARCH_TIMEX_H
+#define __ASM_ARCH_TIMEX_H
+
+#define CLOCK_TICK_RATE 2400000
+
+#endif
diff --git a/arch/arm/mach-nomadik/reset.c b/arch/arm/mach-nomadik/reset.c
new file mode 100644
index 0000000..d55f278
--- /dev/null
+++ b/arch/arm/mach-nomadik/reset.c
@@ -0,0 +1,36 @@
+/*
+ * mach-nomadik/include/mach/system.h
+ *
+ * Copyright (C) 2008 STMicroelectronics
+ *
+ * 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
+ *
+ * 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 <common.h>
+#include <asm/io.h>
+#include <mach/hardware.h>
+
+void __noreturn reset_cpu(unsigned long addr)
+{
+ void __iomem *src_rstsr = (void *)(NOMADIK_SRC_BASE + 0x18);
+
+ /* FIXME: use egpio when implemented */
+
+ /* Write anything to Reset status register */
+ writel(1, src_rstsr);
+
+ /* Not reached */
+ while (1);
+}
+EXPORT_SYMBOL(reset_cpu);
diff --git a/arch/arm/mach-nomadik/timer.c b/arch/arm/mach-nomadik/timer.c
new file mode 100644
index 0000000..12e56f0
--- /dev/null
+++ b/arch/arm/mach-nomadik/timer.c
@@ -0,0 +1,81 @@
+/*
+ * linux/arch/arm/mach-nomadik/timer.c
+ *
+ * Copyright (C) 2008 STMicroelectronics
+ * Copyright (C) 2009 Alessandro Rubini, somewhat based on at91sam926x
+ *
+ * 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.
+ */
+#include <common.h>
+#include <init.h>
+#include <clock.h>
+#include <asm/io.h>
+#include <mach/hardware.h>
+#include <mach/mtu.h>
+#include <mach/timex.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
+
+static u32 nmdk_cycle; /* write-once */
+static __iomem void *mtu_base;
+
+/*
+ * clocksource: the MTU device is a decrementing counters, so we negate
+ * the value being read.
+ */
+static uint64_t nmdk_read_timer(void)
+{
+ return nmdk_cycle - readl(mtu_base + MTU_VAL(0));
+}
+
+static struct clocksource nmdk_clksrc = {
+ .read = nmdk_read_timer,
+ .shift = 20,
+ .mask = 0xffffffff,
+};
+
+static void nmdk_timer_reset(void)
+{
+ u32 cr;
+
+ writel(0, mtu_base + MTU_CR(0)); /* off */
+
+ /* configure load and background-load, and fire it up */
+ writel(nmdk_cycle, mtu_base + MTU_LR(0));
+ writel(nmdk_cycle, mtu_base + MTU_BGLR(0));
+ cr = MTU_CRn_PRESCALE_1 | MTU_CRn_32BITS;
+ writel(cr, mtu_base + MTU_CR(0));
+ writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0));
+}
+
+static int nmdk_timer_init(void)
+{
+ u32 src_cr;
+ unsigned long rate;
+
+ rate = CLOCK_TICK_RATE; /* 2.4MHz */
+ nmdk_cycle = (rate + 1000 / 2) / 1000;
+
+ /* Configure timer sources in "system reset controller" ctrl reg */
+ src_cr = readl(NOMADIK_SRC_BASE);
+ src_cr &= SRC_CR_INIT_MASK;
+ src_cr |= SRC_CR_INIT_VAL;
+ writel(src_cr, NOMADIK_SRC_BASE);
+
+ /* Save global pointer to mtu, used by functions above */
+ mtu_base = (void *)NOMADIK_MTU0_BASE;
+
+ /* Init the timer and register clocksource */
+ nmdk_timer_reset();
+
+ nmdk_clksrc.mult = clocksource_hz2mult(rate, nmdk_clksrc.shift);
+
+ init_clock(&nmdk_clksrc);
+
+ return 0;
+}
+core_initcall(nmdk_timer_init);
--
1.7.1
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