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Thu, 16 Jul 2020 07:19:12 -0700 (PDT) From: Thierry Reding To: Thierry Reding Subject: [PATCH 5/9] soc/tegra: fuse: Extract tegra_get_platform() Date: Thu, 16 Jul 2020 16:18:52 +0200 Message-Id: <20200716141856.544718-6-thierry.reding@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200716141856.544718-1-thierry.reding@gmail.com> References: <20200716141856.544718-1-thierry.reding@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200716_101914_400933_6431D56E X-CRM114-Status: GOOD ( 14.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jon Hunter Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Thierry Reding 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. Signed-off-by: Thierry Reding --- 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 3cdd69d1bd4d..89f1479b4d0e 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, -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel