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ARM: tegra: convert to multi-platform 

This allows Tegra be included in a kernel build that supports multiple
SoCs at once, which is useful for distro kernels.

This change:
* Moves Tegra's Kconfig into its own directory, as seems typical for
  multi-platform conversions.
* Stops selecting some ARM errata that are incompatible with multi-
  platform. This requires that you use a bootloader that enables the
  workaround!
* Deletes some headers and Makefile.boot that aren't needed now that we
  support multi-platform.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2012-09-26 13:08:59 -06:00
parent e4bcda2834
commit 9002722560
5 changed files with 20 additions and 230 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/Kconfig
View File

@ -663,25 +663,6 @@ config ARCH_LPC32XX
help
Support for the NXP LPC32XX family of processors
config ARCH_TEGRA
bool "NVIDIA Tegra"
select ARCH_HAS_CPUFREQ
select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
select CLKSRC_MMIO
select CLKSRC_OF
select COMMON_CLK
select GENERIC_CLOCKEVENTS
select HAVE_CLK
select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select SOC_BUS
select SPARSE_IRQ
select USE_OF
help
This enables support for NVIDIA Tegra based systems (Tegra APX,
Tegra 6xx and Tegra 2 series).
config ARCH_PXA
bool "PXA2xx/PXA3xx-based"
depends on MMU

27
arch/arm/mach-tegra/Kconfig
View File

@ -1,13 +1,28 @@
if ARCH_TEGRA
config ARCH_TEGRA
bool "NVIDIA Tegra" if ARCH_MULTI_V7
select ARCH_HAS_CPUFREQ
select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
select CLKSRC_MMIO
select CLKSRC_OF
select COMMON_CLK
select GENERIC_CLOCKEVENTS
select HAVE_CLK
select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select SOC_BUS
select SPARSE_IRQ
select USE_OF
help
This enables support for NVIDIA Tegra based systems.
comment "NVIDIA Tegra options"
menu "NVIDIA Tegra options"
depends on ARCH_TEGRA
config ARCH_TEGRA_2x_SOC
bool "Enable support for Tegra20 family"
select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
select ARM_ERRATA_720789
select ARM_ERRATA_742230 if SMP
select ARM_ERRATA_751472
select ARM_ERRATA_754327 if SMP
select ARM_ERRATA_764369 if SMP
select ARM_GIC
@ -26,8 +41,6 @@ config ARCH_TEGRA_2x_SOC
config ARCH_TEGRA_3x_SOC
bool "Enable support for Tegra30 family"
select ARM_ERRATA_743622
select ARM_ERRATA_751472
select ARM_ERRATA_754322
select ARM_ERRATA_764369 if SMP
select ARM_GIC
@ -71,4 +84,4 @@ config TEGRA_AHB
config TEGRA_EMC_SCALING_ENABLE
bool "Enable scaling the memory frequency"
endif
endmenu

3
arch/arm/mach-tegra/Makefile.boot
View File

@ -1,3 +0,0 @@
zreladdr-$(CONFIG_ARCH_TEGRA_2x_SOC) += 0x00008000
params_phys-$(CONFIG_ARCH_TEGRA_2x_SOC) := 0x00000100
initrd_phys-$(CONFIG_ARCH_TEGRA_2x_SOC) := 0x00800000

26
arch/arm/mach-tegra/include/mach/timex.h
View File

@ -1,26 +0,0 @@
/*
* arch/arm/mach-tegra/include/mach/timex.h
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@google.com>
* Erik Gilling <konkers@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __MACH_TEGRA_TIMEX_H
#define __MACH_TEGRA_TIMEX_H
#define CLOCK_TICK_RATE 1000000
#endif

175
arch/arm/mach-tegra/include/mach/uncompress.h
View File

@ -1,175 +0,0 @@
/*
* arch/arm/mach-tegra/include/mach/uncompress.h
*
* Copyright (C) 2010 Google, Inc.
* Copyright (C) 2011 Google, Inc.
* Copyright (C) 2011-2012 NVIDIA CORPORATION. All Rights Reserved.
*
* Author:
* Colin Cross <ccross@google.com>
* Erik Gilling <konkers@google.com>
* Doug Anderson <dianders@chromium.org>
* Stephen Warren <swarren@nvidia.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __MACH_TEGRA_UNCOMPRESS_H
#define __MACH_TEGRA_UNCOMPRESS_H
#include <linux/types.h>
#include <linux/serial_reg.h>
#include "../../iomap.h"
#define BIT(x) (1 << (x))
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define DEBUG_UART_SHIFT 2
volatile u8 *uart;
static void putc(int c)
{
if (uart == NULL)
return;
while (!(uart[UART_LSR << DEBUG_UART_SHIFT] & UART_LSR_THRE))
barrier();
uart[UART_TX << DEBUG_UART_SHIFT] = c;
}
static inline void flush(void)
{
}
static const struct {
u32 base;
u32 reset_reg;
u32 clock_reg;
u32 bit;
} uarts[] = {
{
TEGRA_UARTA_BASE,
TEGRA_CLK_RESET_BASE + 0x04,
TEGRA_CLK_RESET_BASE + 0x10,
6,
},
{
TEGRA_UARTB_BASE,
TEGRA_CLK_RESET_BASE + 0x04,
TEGRA_CLK_RESET_BASE + 0x10,
7,
},
{
TEGRA_UARTC_BASE,
TEGRA_CLK_RESET_BASE + 0x08,
TEGRA_CLK_RESET_BASE + 0x14,
23,
},
{
TEGRA_UARTD_BASE,
TEGRA_CLK_RESET_BASE + 0x0c,
TEGRA_CLK_RESET_BASE + 0x18,
1,
},
{
TEGRA_UARTE_BASE,
TEGRA_CLK_RESET_BASE + 0x0c,
TEGRA_CLK_RESET_BASE + 0x18,
2,
},
};
static inline bool uart_clocked(int i)
{
if (*(u8 *)uarts[i].reset_reg & BIT(uarts[i].bit))
return false;
if (!(*(u8 *)uarts[i].clock_reg & BIT(uarts[i].bit)))
return false;
return true;
}
#ifdef CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA
int auto_odmdata(void)
{
volatile u32 *pmc = (volatile u32 *)TEGRA_PMC_BASE;
u32 odmdata = pmc[0xa0 / 4];
/*
* Bits 19:18 are the console type: 0=default, 1=none, 2==DCC, 3==UART
* Some boards apparently swap the last two values, but we don't have
* any way of catering for that here, so we just accept either. If this
* doesn't make sense for your board, just don't enable this feature.
*
* Bits 17:15 indicate the UART to use, 0/1/2/3/4 are UART A/B/C/D/E.
*/
switch ((odmdata >> 18) & 3) {
case 2:
case 3:
break;
default:
return -1;
}
return (odmdata >> 15) & 7;
}
#endif
/*
* Setup before decompression. This is where we do UART selection for
* earlyprintk and init the uart_base register.
*/
static inline void arch_decomp_setup(void)
{
int uart_id;
volatile u32 *apb_misc = (volatile u32 *)TEGRA_APB_MISC_BASE;
u32 chip, div;
#if defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
uart_id = auto_odmdata();
#elif defined(CONFIG_TEGRA_DEBUG_UARTA)
uart_id = 0;
#elif defined(CONFIG_TEGRA_DEBUG_UARTB)
uart_id = 1;
#elif defined(CONFIG_TEGRA_DEBUG_UARTC)
uart_id = 2;
#elif defined(CONFIG_TEGRA_DEBUG_UARTD)
uart_id = 3;
#elif defined(CONFIG_TEGRA_DEBUG_UARTE)
uart_id = 4;
#endif
if (uart_id < 0 || uart_id >= ARRAY_SIZE(uarts) ||
!uart_clocked(uart_id))
uart = NULL;
else
uart = (volatile u8 *)uarts[uart_id].base;
if (uart == NULL)
return;
chip = (apb_misc[0x804 / 4] >> 8) & 0xff;
if (chip == 0x20)
div = 0x0075;
else
div = 0x00dd;
uart[UART_LCR << DEBUG_UART_SHIFT] |= UART_LCR_DLAB;
uart[UART_DLL << DEBUG_UART_SHIFT] = div & 0xff;
uart[UART_DLM << DEBUG_UART_SHIFT] = div >> 8;
uart[UART_LCR << DEBUG_UART_SHIFT] = 3;
}
#endif