diff mbox

[v10,4/7] ARM: tegra: add support for Trusted Foundations

Message ID 1383819106-1400-5-git-send-email-acourbot@nvidia.com
State Superseded, archived
Headers show

Commit Message

Alexandre Courbot Nov. 7, 2013, 10:11 a.m. UTC
Register the firmware operations for Trusted Foundations if the device
tree indicates it is active on the device.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
---
 Documentation/devicetree/bindings/arm/tegra.txt | 5 +++++
 arch/arm/mach-tegra/Kconfig                     | 1 +
 arch/arm/mach-tegra/common.c                    | 2 ++
 3 files changed, 8 insertions(+)

Comments

Stephen Warren Nov. 12, 2013, 8:23 p.m. UTC | #1
On 11/07/2013 03:11 AM, Alexandre Courbot wrote:
> Register the firmware operations for Trusted Foundations if the device
> tree indicates it is active on the device.

> diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c

>  void __init tegra_init_early(void)
>  {
> +	of_register_trusted_foundations();
>  	tegra_cpu_reset_handler_init();
>  	tegra_apb_io_init();
>  	tegra_init_fuse();

Your other bugfix patch for 3.13 moved tegra_cpu_reset_handler_init().
Should the call to of_register_trusted_foundations() move with it when
this is applied, or should it just stay right at the start of
tegra_init_early()? Either way is fine; just let me know which way to
fix up the conflict when this gets applied.
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Alexandre Courbot Nov. 13, 2013, 1:59 a.m. UTC | #2
On 11/13/2013 05:23 AM, Stephen Warren wrote:
> On 11/07/2013 03:11 AM, Alexandre Courbot wrote:
>> Register the firmware operations for Trusted Foundations if the device
>> tree indicates it is active on the device.
>
>> diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
>
>>   void __init tegra_init_early(void)
>>   {
>> +	of_register_trusted_foundations();
>>   	tegra_cpu_reset_handler_init();
>>   	tegra_apb_io_init();
>>   	tegra_init_fuse();
>
> Your other bugfix patch for 3.13 moved tegra_cpu_reset_handler_init().
> Should the call to of_register_trusted_foundations() move with it when
> this is applied, or should it just stay right at the start of
> tegra_init_early()? Either way is fine; just let me know which way to
> fix up the conflict when this gets applied.

I rebased on -next and left it at the start of tegra_init_early(). Even 
though at the moment the only requirement is that the call is made 
before tegra_cpu_reset_handler_init(), it seems to make sense to get rid 
of firmware-related initialization as early as possible.

Btw, this patchset is still based on the 3.12 code, before common.c got 
renamed to tegra.c, so you will have a problem here as well (sorry about 
that). The conflict is easy to resolve, but if you want me to send you a 
properly rebased version, just let me know.

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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/arm/tegra.txt b/Documentation/devicetree/bindings/arm/tegra.txt
index ed9c85334436..558ed4b4ef39 100644
--- a/Documentation/devicetree/bindings/arm/tegra.txt
+++ b/Documentation/devicetree/bindings/arm/tegra.txt
@@ -32,3 +32,8 @@  board-specific compatible values:
   nvidia,whistler
   toradex,colibri_t20-512
   toradex,iris
+
+Trusted Foundations
+-------------------------------------------
+Tegra supports the Trusted Foundation secure monitor. See the
+"tlm,trusted-foundations" binding's documentation for more details.
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 67a76f2dfb9f..4e512782ea23 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -2,6 +2,7 @@  config ARCH_TEGRA
 	bool "NVIDIA Tegra" if ARCH_MULTI_V7
 	select ARCH_HAS_CPUFREQ
 	select ARCH_REQUIRE_GPIOLIB
+	select ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
 	select ARM_GIC
 	select CLKDEV_LOOKUP
 	select CLKSRC_MMIO
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 94a119a35af8..b405e4594cb5 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -27,6 +27,7 @@ 
 #include <linux/clk-provider.h>
 
 #include <asm/hardware/cache-l2x0.h>
+#include <asm/trusted_foundations.h>
 
 #include "board.h"
 #include "common.h"
@@ -99,6 +100,7 @@  static void __init tegra_init_cache(void)
 
 void __init tegra_init_early(void)
 {
+	of_register_trusted_foundations();
 	tegra_cpu_reset_handler_init();
 	tegra_apb_io_init();
 	tegra_init_fuse();