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Mon, 3 Dec 2018 02:45:09 +0000 Received: from DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::adf8:f49d:deb4:58fd]) by DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::adf8:f49d:deb4:58fd%3]) with mapi id 15.20.1382.020; Mon, 3 Dec 2018 02:45:09 +0000 From: Anson Huang To: "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , Fabio Estevam , "linux@armlinux.org.uk" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" CC: dl-linux-imx Subject: [PATCH] ARM: imx: update the cpu power up timing setting Thread-Topic: [PATCH] ARM: imx: update the cpu power up timing setting Thread-Index: AQHUirI0UtO9K47MFUWyoWpC6YVNRA== Date: Mon, 3 Dec 2018 02:45:09 +0000 Message-ID: <1543804767-17650-1-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: HK0PR01CA0047.apcprd01.prod.exchangelabs.com (2603:1096:203:3e::35) To DB3PR0402MB3916.eurprd04.prod.outlook.com (2603:10a6:8:10::18) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.66] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DB3PR0402MB3721;6:EWuwsPB63pCBxGWc0eY6YM2Jg+8iZPZoglwLXEbMl6zwcy4aVoD8XJfc3ss2/LBmagZkxfpWG8lEwIbVAU0Mcp4SGGCC4ZE0oDZlT8VAaPb+91jQjNd0I6GdIG9EbFSVc7aykESWlKVKqowkHRkA+U2p9iQloTUBx0aDMtUbUqHbrWQt6BuIVSDQrAdqRLzAYsBdokt8coQhQgC9Lr7DWdln19H04lLnGaqEKBqYKirL/Z2aoqvwb4Lj77J9yZMiSd4YV8T8yKepyNUheGPiihXtDCEeR0Me7amVD5Ezvb/q0YZErHB+jt5qr12e5SEJyYgAmMUQblIA2a9IUJQnmzD/pjPGhqg4MaCKHujeKpIxEbI3SndjGd+JZHFK93fbmI/tYMVCKbMLfpwJUxZ6WHCm+besCTEduG2g6Jrrq9iOmwIjaZdU45w/KaVmL9M5QTl3T3YsMzaYQc0EAEGaUA==;5:gc++zmeNgsAQLV+MQI30kQnFrZJ82JApZe2fUvnMUbDHa+4n69RfwoNhWJaqDaYAdppUYx+1kPKwth5PXgBxu+EtwBSiUqmJ0qMcaBeyISko62MEYXSYV6wzSck1vgSEt/ZxreqFeusrjLXz1y+nvlTnr7VmzdZJRv4ScaI2nKE=;7:hUGK1rjA4uCucxJ76+/7D5gah/vs6wteJylboUXlIVW6tf5um96gUBojbbYnz7l9EJIfp4MBhs/yB1weuj6a0tQX2A77wdjOaGC6JOqKxrBcIZBjEFOjMh8tEBhtynKAtHL73fbGXWo/uO3Frp919A== x-ms-office365-filtering-correlation-id: d3e31897-adc8-4274-c363-08d658c9567a x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390098)(7020095)(4652040)(8989299)(5600074)(711020)(4618075)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7153060)(7193020);SRVR:DB3PR0402MB3721; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: KMUpYDJKOXrCXzeC3KbT+0xfraHsJ23QMf1TgXq5jEfTlTwzD1AagVipq6KAuVsu3QfJIlud9kZyKY8q70QLYZV7L6/PmRS56YD0pgseDrj/4gf+On3W+gJSKHqWNreoFWQAbwjI8IbCOIiV0IfwWxbxIftNsGoh6gwUXV2aCkGtwUPsFF5vOvG01tuaDR3hwFi5FAAc+0tARP3/iQD1Ch7hLBiHUjUoTvzg5Ew2MTR+tzEMcLz6Hl+HGTJJ9Q4mGlegsRamAfIV2h9u2P8IDjT4ZoDS+u7dRdbCcY4uHngQTbRAWL+0+TJqOLbiFGHf1P/l+n0EJr+sFkzH+0AOpr4flwS7ygi9isTxMr48vgE= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: d3e31897-adc8-4274-c363-08d658c9567a X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Dec 2018 02:45:09.0776 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3721 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The sw2iso count should cover ARM LDO ramp-up time, the MAX ARM LDO ramp-up time may be up to more than 100us on some boards, this patch sets sw2iso to 0xf (~384us) which is the reset value, and it is much more safe to cover different boards, since we have observed that some customer boards failed with current setting of 0x2. Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6s= x") Signed-off-by: Anson Huang --- arch/arm/mach-imx/cpuidle-imx6sx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle= -imx6sx.c index 243a108..fd0053e 100644 --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -110,7 +110,7 @@ int __init imx6sx_cpuidle_init(void) * except for power up sw2iso which need to be * larger than LDO ramp up time. */ - imx_gpc_set_arm_power_up_timing(2, 1); + imx_gpc_set_arm_power_up_timing(0xf, 1); imx_gpc_set_arm_power_down_timing(1, 1); =20 return cpuidle_register(&imx6sx_cpuidle_driver, NULL); --=20 2.7.4