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Message-ID: <1323348254-29072-5-git-send-email-pdeschrijver@nvidia.com>
Date: Thu, 8 Dec 2011 14:43:47 +0200
From: Peter De Schrijver <pdeschrijver@...dia.com>
To: Peter De Schrijver <pdeschrijver@...dia.com>
CC: Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Randy Dunlap <rdunlap@...otime.net>,
Russell King <linux@....linux.org.uk>,
Colin Cross <ccross@...roid.com>,
Olof Johansson <olof@...om.net>,
Stephen Warren <swarren@...dia.com>,
Gary King <gking@...dia.com>,
<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-tegra@...r.kernel.org>
Subject: [PATCH v6 04/10] arm/tegra: prepare early init for multiple tegra variants
This patch splits the early init code in a common and a tegra20 specific part.
L2 cache initialization is generalized and discovers the cache associativity
at runtime. Also use arm_pm_restart instead of arm_arch_reset and reset the
the system using the PMC reset feature rather then the CAR system reset.
Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
arch/arm/mach-tegra/board-dt.c | 10 +++++---
arch/arm/mach-tegra/board-harmony.c | 2 +-
arch/arm/mach-tegra/board-paz00.c | 2 +-
arch/arm/mach-tegra/board-seaboard.c | 6 ++--
arch/arm/mach-tegra/board-trimslice.c | 2 +-
arch/arm/mach-tegra/board.h | 2 +-
arch/arm/mach-tegra/clock.c | 5 ----
arch/arm/mach-tegra/common.c | 34 ++++++++++++++++++++------------
8 files changed, 34 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/board-dt.c b/arch/arm/mach-tegra/board-dt.c
index 6a460a2..ef9843c 100644
--- a/arch/arm/mach-tegra/board-dt.c
+++ b/arch/arm/mach-tegra/board-dt.c
@@ -133,7 +133,8 @@ static void __init tegra_dt_init(void)
"Unknown platform! Pinmuxing not initialized\n");
}
-static const char * tegra_dt_board_compat[] = {
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+static const char *tegra20_dt_board_compat[] = {
"compulab,trimslice",
"nvidia,harmony",
"compal,paz00",
@@ -142,13 +143,14 @@ static const char * tegra_dt_board_compat[] = {
NULL
};
-DT_MACHINE_START(TEGRA_DT, "nVidia Tegra (Flattened Device Tree)")
+DT_MACHINE_START(TEGRA_DT, "nVidia Tegra20 (Flattened Device Tree)")
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_dt_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
.init_machine = tegra_dt_init,
.restart = tegra_assert_system_reset,
- .dt_compat = tegra_dt_board_compat,
+ .dt_compat = tegra20_dt_board_compat,
MACHINE_END
+#endif
diff --git a/arch/arm/mach-tegra/board-harmony.c b/arch/arm/mach-tegra/board-harmony.c
index 70ee674..a0f9634 100644
--- a/arch/arm/mach-tegra/board-harmony.c
+++ b/arch/arm/mach-tegra/board-harmony.c
@@ -186,7 +186,7 @@ MACHINE_START(HARMONY, "harmony")
.atag_offset = 0x100,
.fixup = tegra_harmony_fixup,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index 1f563dd..fcf4f37 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -216,7 +216,7 @@ MACHINE_START(PAZ00, "Toshiba AC100 / Dynabook AZ")
.atag_offset = 0x100,
.fixup = tegra_paz00_fixup,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
diff --git a/arch/arm/mach-tegra/board-seaboard.c b/arch/arm/mach-tegra/board-seaboard.c
index c1599eb..cfc74d4 100644
--- a/arch/arm/mach-tegra/board-seaboard.c
+++ b/arch/arm/mach-tegra/board-seaboard.c
@@ -283,7 +283,7 @@ static void __init tegra_wario_init(void)
MACHINE_START(SEABOARD, "seaboard")
.atag_offset = 0x100,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
@@ -294,7 +294,7 @@ MACHINE_END
MACHINE_START(KAEN, "kaen")
.atag_offset = 0x100,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
@@ -305,7 +305,7 @@ MACHINE_END
MACHINE_START(WARIO, "wario")
.atag_offset = 0x100,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
diff --git a/arch/arm/mach-tegra/board-trimslice.c b/arch/arm/mach-tegra/board-trimslice.c
index c242314..cd52820 100644
--- a/arch/arm/mach-tegra/board-trimslice.c
+++ b/arch/arm/mach-tegra/board-trimslice.c
@@ -175,7 +175,7 @@ MACHINE_START(TRIMSLICE, "trimslice")
.atag_offset = 0x100,
.fixup = tegra_trimslice_fixup,
.map_io = tegra_map_common_io,
- .init_early = tegra_init_early,
+ .init_early = tegra20_init_early,
.init_irq = tegra_init_irq,
.handle_irq = gic_handle_irq,
.timer = &tegra_timer,
diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h
index 1d14df7..c268cfa 100644
--- a/arch/arm/mach-tegra/board.h
+++ b/arch/arm/mach-tegra/board.h
@@ -25,7 +25,7 @@
void tegra_assert_system_reset(char mode, const char *cmd);
-void __init tegra_init_early(void);
+void __init tegra20_init_early(void);
void __init tegra_map_common_io(void);
void __init tegra_init_irq(void);
void __init tegra_init_clock(void);
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index f27bdcc..f25b7e5 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -399,11 +399,6 @@ void tegra_periph_reset_assert(struct clk *c)
}
EXPORT_SYMBOL(tegra_periph_reset_assert);
-void __init tegra_init_clock(void)
-{
- tegra2_init_clocks();
-}
-
/*
* The SDMMC controllers on tegra20 have extra bits in the clock source
* register that adjust the delay between the clock and data to compenstate
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 20f396d..5b711ad 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/mach-tegra/board-harmony.c
+ * arch/arm/mach-tegra/common.c
*
* Copyright (C) 2010 Google, Inc.
*
@@ -33,16 +33,16 @@
void tegra_assert_system_reset(char mode, const char *cmd)
{
- void __iomem *reset = IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x04);
+ void __iomem *reset = IO_ADDRESS(TEGRA_PMC_BASE + 0);
u32 reg;
- /* use *_related to avoid spinlock since caches are off */
reg = readl_relaxed(reset);
- reg |= 0x04;
+ reg |= 0x10;
writel_relaxed(reg, reset);
}
-static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+static __initdata struct tegra_clk_init_table tegra20_clk_init_table[] = {
/* name parent rate enabled */
{ "clk_m", NULL, 0, true },
{ "pll_p", "clk_m", 216000000, true },
@@ -58,24 +58,32 @@ static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
{ "cpu", NULL, 0, true },
{ NULL, NULL, 0, 0},
};
+#endif
-static void __init tegra_init_cache(void)
+static void __init tegra_init_cache(u32 tag_latency, u32 data_latency)
{
#ifdef CONFIG_CACHE_L2X0
void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
+ u32 aux_ctrl, cache_type;
+
+ writel_relaxed(tag_latency, p + L2X0_TAG_LATENCY_CTRL);
+ writel_relaxed(data_latency, p + L2X0_DATA_LATENCY_CTRL);
- writel_relaxed(0x331, p + L2X0_TAG_LATENCY_CTRL);
- writel_relaxed(0x441, p + L2X0_DATA_LATENCY_CTRL);
+ cache_type = readl(p + L2X0_CACHE_TYPE);
+ aux_ctrl = (cache_type & 0x700) << (17-8);
+ aux_ctrl |= 0x6C000001;
- l2x0_init(p, 0x6C080001, 0x8200c3fe);
+ l2x0_init(p, aux_ctrl, 0x8200c3fe);
#endif
}
-void __init tegra_init_early(void)
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+void __init tegra20_init_early(void)
{
tegra_init_fuse();
- tegra_init_clock();
- tegra_clk_init_from_table(common_clk_init_table);
- tegra_init_cache();
+ tegra2_init_clocks();
+ tegra_clk_init_from_table(tegra20_clk_init_table);
+ tegra_init_cache(0x331, 0x441);
}
+#endif
--
1.7.7.rc0.72.g4b5ea.dirty
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