[PATCH 2/2] ARM: tegra: convert to multi-platform
Stephen Warren
swarren at wwwdotorg.org
Fri Mar 29 20:19:50 EDT 2013
From: Stephen Warren <swarren at nvidia.com>
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 at nvidia.com>
---
arch/arm/Kconfig | 19 ---
arch/arm/mach-tegra/Kconfig | 27 +++-
arch/arm/mach-tegra/Makefile.boot | 3 -
arch/arm/mach-tegra/include/mach/timex.h | 26 ----
arch/arm/mach-tegra/include/mach/uncompress.h | 175 -------------------------
5 files changed, 20 insertions(+), 230 deletions(-)
delete mode 100644 arch/arm/mach-tegra/Makefile.boot
delete mode 100644 arch/arm/mach-tegra/include/mach/timex.h
delete mode 100644 arch/arm/mach-tegra/include/mach/uncompress.h
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 59b7be7..f6dfe23 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -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
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index d1c4893..df99ee9 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -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
diff --git a/arch/arm/mach-tegra/Makefile.boot b/arch/arm/mach-tegra/Makefile.boot
deleted file mode 100644
index 2943381..0000000
--- a/arch/arm/mach-tegra/Makefile.boot
+++ /dev/null
@@ -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
diff --git a/arch/arm/mach-tegra/include/mach/timex.h b/arch/arm/mach-tegra/include/mach/timex.h
deleted file mode 100644
index a44ccbd..0000000
--- a/arch/arm/mach-tegra/include/mach/timex.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * arch/arm/mach-tegra/include/mach/timex.h
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * Author:
- * Colin Cross <ccross at google.com>
- * Erik Gilling <konkers at 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
diff --git a/arch/arm/mach-tegra/include/mach/uncompress.h b/arch/arm/mach-tegra/include/mach/uncompress.h
deleted file mode 100644
index 0838641..0000000
--- a/arch/arm/mach-tegra/include/mach/uncompress.h
+++ /dev/null
@@ -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 at google.com>
- * Erik Gilling <konkers at google.com>
- * Doug Anderson <dianders at chromium.org>
- * Stephen Warren <swarren at 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
--
1.7.10.4
More information about the linux-arm-kernel
mailing list