From: Thierry Reding <thierry.reding@gmail.com> To: Thierry Reding <thierry.reding@gmail.com> Cc: Jon Hunter <jonathanh@nvidia.com>, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 07/14] soc/tegra: fuse: Extract tegra_get_platform() Date: Thu, 17 Sep 2020 12:07:45 +0200 [thread overview] Message-ID: <20200917100752.3516153-8-thierry.reding@gmail.com> (raw) In-Reply-To: <20200917100752.3516153-1-thierry.reding@gmail.com> From: Thierry Reding <treding@nvidia.com> This function extracts the PRE_SI_PLATFORM field from the HIDREV register and can be used to determine which platform the kernel runs on (silicon, simulation, ...). Note that while only Tegra194 and later define this field, it should be safe to call this on prior generations as well since this field should read as 0, indicating silicon. Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> --- drivers/soc/tegra/fuse/fuse-tegra.c | 2 +- drivers/soc/tegra/fuse/tegra-apbmisc.c | 5 +++++ include/soc/tegra/fuse.h | 1 + 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index d1f8dd0289e6..7e6b6ee59120 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -336,7 +336,7 @@ static ssize_t platform_show(struct device *dev, struct device_attribute *attr, * platform type is silicon and all other non-zero values indicate * the type of simulation platform is being used. */ - return sprintf(buf, "%d\n", (tegra_read_chipid() >> 20) & 0xf); + return sprintf(buf, "%d\n", tegra_get_platform()); } static DEVICE_ATTR_RO(platform); diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 8e416ad91ee2..92a2d646c183 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -47,6 +47,11 @@ u8 tegra_get_minor_rev(void) return (tegra_read_chipid() >> 16) & 0xf; } +u8 tegra_get_platform(void) +{ + return (tegra_read_chipid() >> 20) & 0xf; +} + u32 tegra_read_straps(void) { WARN(!chipid, "Tegra ABP MISC not yet available\n"); diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index 1097feca41ed..214908fc5581 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -23,6 +23,7 @@ u32 tegra_read_chipid(void); u8 tegra_get_chip_id(void); +u8 tegra_get_platform(void); enum tegra_revision { TEGRA_REVISION_UNKNOWN = 0, -- 2.28.0
WARNING: multiple messages have this Message-ID (diff)
From: Thierry Reding <thierry.reding@gmail.com> To: Thierry Reding <thierry.reding@gmail.com> Cc: linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jon Hunter <jonathanh@nvidia.com> Subject: [PATCH v2 07/14] soc/tegra: fuse: Extract tegra_get_platform() Date: Thu, 17 Sep 2020 12:07:45 +0200 [thread overview] Message-ID: <20200917100752.3516153-8-thierry.reding@gmail.com> (raw) In-Reply-To: <20200917100752.3516153-1-thierry.reding@gmail.com> From: Thierry Reding <treding@nvidia.com> This function extracts the PRE_SI_PLATFORM field from the HIDREV register and can be used to determine which platform the kernel runs on (silicon, simulation, ...). Note that while only Tegra194 and later define this field, it should be safe to call this on prior generations as well since this field should read as 0, indicating silicon. Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> --- drivers/soc/tegra/fuse/fuse-tegra.c | 2 +- drivers/soc/tegra/fuse/tegra-apbmisc.c | 5 +++++ include/soc/tegra/fuse.h | 1 + 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index d1f8dd0289e6..7e6b6ee59120 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -336,7 +336,7 @@ static ssize_t platform_show(struct device *dev, struct device_attribute *attr, * platform type is silicon and all other non-zero values indicate * the type of simulation platform is being used. */ - return sprintf(buf, "%d\n", (tegra_read_chipid() >> 20) & 0xf); + return sprintf(buf, "%d\n", tegra_get_platform()); } static DEVICE_ATTR_RO(platform); diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 8e416ad91ee2..92a2d646c183 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -47,6 +47,11 @@ u8 tegra_get_minor_rev(void) return (tegra_read_chipid() >> 16) & 0xf; } +u8 tegra_get_platform(void) +{ + return (tegra_read_chipid() >> 20) & 0xf; +} + u32 tegra_read_straps(void) { WARN(!chipid, "Tegra ABP MISC not yet available\n"); diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index 1097feca41ed..214908fc5581 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -23,6 +23,7 @@ u32 tegra_read_chipid(void); u8 tegra_get_chip_id(void); +u8 tegra_get_platform(void); enum tegra_revision { TEGRA_REVISION_UNKNOWN = 0, -- 2.28.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-09-17 10:08 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-17 10:07 [PATCH v2 00/14] arm64: tegra: Initial Tegra234 VDK support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 01/14] dt-bindings: misc: tegra-apbmisc: Add missing compatible strings Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 02/14] dt-bindings: misc: tegra186-misc: Add missing compatible string Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 03/14] dt-bindings: misc: tegra186-misc: Add Tegra234 support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 04/14] dt-bindings: tegra: Add Tegra234 VDK compatible Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 05/14] dt-bindings: fuse: tegra: Add Tegra234 support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 06/14] dt-bindings: tegra: pmc: " Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` Thierry Reding [this message] 2020-09-17 10:07 ` [PATCH v2 07/14] soc/tegra: fuse: Extract tegra_get_platform() Thierry Reding 2020-09-17 10:07 ` [PATCH v2 08/14] soc/tegra: fuse: Implement tegra_is_silicon() Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 09/14] soc/tegra: fuse: Add Tegra234 support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 10/14] soc/tegra: misc: " Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 11/14] soc/tegra: pmc: Reorder reset sources/levels definitions Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 12/14] soc/tegra: pmc: Add Tegra234 support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 13/14] firmware: tegra: Enable BPMP support on Tegra234 Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-17 10:07 ` [PATCH v2 14/14] arm64: tegra: Initial Tegra234 VDK support Thierry Reding 2020-09-17 10:07 ` Thierry Reding 2020-09-24 10:32 ` Mikko Perttunen 2020-09-24 10:32 ` Mikko Perttunen 2020-09-18 12:54 ` [PATCH v2 00/14] " Jon Hunter 2020-09-18 12:54 ` Jon Hunter
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