linux-kernel - [PATCH v3 3/3] soc: samsung: exynos-chipid: Add Exynos850 support

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Message-Id: <20211014133508.1210-3-semen.protsenko@linaro.org>
Date:   Thu, 14 Oct 2021 16:35:08 +0300
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Sumit Semwal <sumit.semwal@...aro.org>,
        linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/3] soc: samsung: exynos-chipid: Add Exynos850 support

Add chip-id support for Exynos850 SoC. Despite its "E3830" ID, the
actual SoC name is Exynos850 (Exynos3830 name is internal and outdated).

Format of Product_ID register in Exynos850 (offset 0x0):

     [31:0] Product ID (identification)

Format of CHIPID_REV register in Exynos850 (offset 0x10):

    [23:20] Main revision
    [19:16] Sub revision

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
Changes in v2:
  - Renamed *_rev_bit fields in 'struct exynos_chipid_variant' to
    *_rev_shift

Changes in v3:
  - Rebased on top of krzk/for-next
  - Added Exynos850 chip-id registers format in commit message

 drivers/soc/samsung/exynos-chipid.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c
index 986978e83661..0aeb24bcc11a 100644
--- a/drivers/soc/samsung/exynos-chipid.c
+++ b/drivers/soc/samsung/exynos-chipid.c
@@ -55,6 +55,7 @@ static const struct exynos_soc_id {
 	{ "EXYNOS5440", 0xE5440000 },
 	{ "EXYNOS5800", 0xE5422000 },
 	{ "EXYNOS7420", 0xE7420000 },
+	{ "EXYNOS850", 0xE3830000 },
 };
 
 static const char *product_id_to_soc_id(unsigned int product_id)
@@ -169,10 +170,19 @@ static const struct exynos_chipid_variant exynos4210_chipid_drv_data = {
 	.sub_rev_shift	= 0,
 };
 
+static const struct exynos_chipid_variant exynos850_chipid_drv_data = {
+	.rev_reg	= 0x10,
+	.main_rev_shift	= 20,
+	.sub_rev_shift	= 16,
+};
+
 static const struct of_device_id exynos_chipid_of_device_ids[] = {
 	{
 		.compatible	= "samsung,exynos4210-chipid",
 		.data		= &exynos4210_chipid_drv_data,
+	}, {
+		.compatible	= "samsung,exynos850-chipid",
+		.data		= &exynos850_chipid_drv_data,
 	},
 	{ }
 };
-- 
2.30.2