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Fri, 11 Jan 2019 06:22:50 +0000 From: Anson Huang To: "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , Fabio Estevam , "linux@armlinux.org.uk" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: [PATCH V2 2/3] ARM: imx: add i.MX7ULP SoC revision support Thread-Topic: [PATCH V2 2/3] ARM: imx: add i.MX7ULP SoC revision support Thread-Index: AQHUqXYTfowyprR/GkaKRunxZlhVwA== Date: Fri, 11 Jan 2019 06:22:50 +0000 Message-ID: <1547187469-14046-2-git-send-email-Anson.Huang@nxp.com> References: <1547187469-14046-1-git-send-email-Anson.Huang@nxp.com> In-Reply-To: <1547187469-14046-1-git-send-email-Anson.Huang@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK2PR04CA0090.apcprd04.prod.outlook.com (2603:1096:202:15::34) To DB3PR0402MB3916.eurprd04.prod.outlook.com (2603:10a6:8:10::18) authentication-results: spf=none (sender IP is ) smtp.mailfrom=anson.huang@nxp.com; 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PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: k8YRZJoYrggws1a4lSjcz2jbkrmneNTiqE+C9rav6RR1LHzMoT6Gbq4Ie83d/a3IllIlDJNS3NeiOXCxLY+Js8ZdwxpIHiKOF5wxrLruKo/sATsPrkj7flBD1F3RAf6VfVlv2o4Zfyrn3isV/ObwThV5xQVM7ZMTnFWf5wCMqyw4REb7dCUiRg+up/dr9Djh+haMbmsmOLi2oecM+g03UJjZ6+b2FInNzhB86UfaQUsBW3yNjR0b2Yronrzy1YsgEBXTJj+ofuJmYrriaaxfRpgXehB50yxEGcnDeh82OIMXpLRtoXqJAJQvkJMheffX+FL8878q2+NOALrKFfEVya4PU9FYi7Jj4IU4ilU+XKGvd+r0BQlIzcgBbG3wCKYMLRpA++JgfG7qSgbf2+5iRQrmPZ7BIDOqc2XoU25YuzE= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 507e45b1-b0e1-44c8-9128-08d6778d3602 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Jan 2019 06:22:41.1943 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3788 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190110_222253_347863_552A4076 X-CRM114-Status: GOOD ( 13.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dl-linux-imx Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP i.MX7ULP SoC's revision info is inside the SIM module, bit[31:28] of JTAG_ID register defines revision as below from B0: 0001 B0 0010 B1 This patch adds SoC revision support for i.MX7ULP, test result as below: root@imx7ulp-evk ~$ cat /sys/devices/soc0/revision 2.1 Signed-off-by: Anson Huang --- arch/arm/mach-imx/mach-imx7ulp.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/arch/arm/mach-imx/mach-imx7ulp.c b/arch/arm/mach-imx/mach-imx7ulp.c index 19c5b30..11ac71a 100644 --- a/arch/arm/mach-imx/mach-imx7ulp.c +++ b/arch/arm/mach-imx/mach-imx7ulp.c @@ -6,18 +6,57 @@ */ #include +#include #include +#include #include #include "common.h" #include "cpuidle.h" #include "hardware.h" +#define SIM_JTAG_ID_REG 0x8c + +static void __init imx7ulp_set_revision(void) +{ + struct regmap *sim; + u32 revision; + + sim = syscon_regmap_lookup_by_compatible("fsl,imx7ulp-sim"); + if (IS_ERR(sim)) { + pr_warn("failed to find fsl,imx7ulp-sim regmap!\n"); + return; + } + + if (regmap_read(sim, SIM_JTAG_ID_REG, &revision)) { + pr_warn("failed to read sim regmap!\n"); + return; + } + + /* + * bit[31:28] of JTAG_ID register defines revision as below from B0: + * 0001 B0 + * 0010 B1 + */ + switch (revision >> 28) { + case 1: + imx_set_soc_revision(IMX_CHIP_REVISION_2_0); + break; + case 2: + imx_set_soc_revision(IMX_CHIP_REVISION_2_1); + break; + default: + imx_set_soc_revision(IMX_CHIP_REVISION_1_0); + break; + } +} + static void __init imx7ulp_init_machine(void) { imx7ulp_pm_init(); mxc_set_cpu_type(MXC_CPU_IMX7ULP); + imx7ulp_set_revision(); of_platform_default_populate(NULL, NULL, imx_soc_device_init()); }