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Tue, 4 Dec 2018 03:17:50 +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 15.20.1382.023; Tue, 4 Dec 2018 03:17:50 +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 V2] ARM: imx: update the cpu power up timing setting on i.mx6sx Thread-Topic: [PATCH V2] ARM: imx: update the cpu power up timing setting on i.mx6sx Thread-Index: AQHUi3/sG9Q7quxpRUG4P7UHstH/fQ== Date: Tue, 4 Dec 2018 03:17:45 +0000 Message-ID: <1543893119-3716-1-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: HK2PR03CA0065.apcprd03.prod.outlook.com (2603:1096:202:17::35) To DB3PR0402MB3916.eurprd04.prod.outlook.com (2603:10a6:8:10::18) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.67] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DB3PR0402MB3754;6:kmYEOwuiqJDlRZ8zJxcbxo9c5sdROWQpCOjH+SmbITtiiFDa+NfBgEJv7+YKbkC8bZGMCaV0bvBQqPUHTwhIzT5gOsfZpKthxU0nwth1O64pchbi4OSzRx6Zc3pdV5ov0hz21R4fd2vKKXzpURMDJ9ZzACjDHu8tK1Egk5WhOEhL131aJpGritOo64t/R8GFItPlgfwGxegMPkN/Xo3t3xMvmbbwMwHoKpB/VdkI2KgLzHsNVUhe+NAnRiiBxw+zK9++mGO9W02Pl58DqIchJtDUMzq4nQpZwK+oeACbpiezaH49Ku+kk9G7MefTq7PnqQjlooh5FydxqooD1AdpiihZBcOFWftKsZ65VenVlRdw6q/pZbI/XikScChNr3d1M95DJjJbvI5nAoK3/yIbU0cc2fkVCXGtMR26n9i85XvNmSjenNFgzGUAUYSQGyYKx0uiwNIQBKAR7uV5JDlEKQ==;5:AwlHr7m1M4WmN0zy6BIT6VNBv4Z4s50Oi87jZuvu/D0YpnR0mNQs+I7HdQB1RtA0KhGh+nuQcY0I/EaC2faFRQMONGjHX9Yge/martz2qqZL6AoH0/8e6AjyJHsNjqE7XBlmMcsqTidJF/GtfhovZCPCKdEnH2PlvvFzEGfuQvo=;7:ZTd/ngzSyv4IC7cmvnEISgy9wKVnL0eZLZIDV0EIhtE14y5y0B7yBtowrMHGdPq2eZyv5WVTYlfhbvliMDCnw/fI07cVUzINCiXmXKCHgDzSaxguEszrM5OROeM8QX3nrxywfhGMYKw3UX6uSMG7nA== x-ms-office365-filtering-correlation-id: f6d0aea2-75d9-4006-123c-08d659970ed7 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390098)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7153060)(7193020);SRVR:DB3PR0402MB3754; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: 7vySBlKdqfaBqfdHxp9urmvGG9fcSJPexzBJ1awds0vybqnGYsRSeqOm0uGuc5KEZwHZugq2+k21BY4pXFhS3zAwDjVeojEw9lKNLWGdQapammtHB00pgkNsWFfp8kvJoOlS5iR/f+YfUS963YyuNcRZLVOG2mw+VTML+SfEEvbzHz1T9piWWuBivvCuASvxAE+f0etqXnxMn1QI1+rgbeSqlx4iTB6yLNHResqyqsEbMALwspiFNurAXPs0rxdLdaBm32NNtNjrVXAt/C2chxC+rcw9qVXsFtgFU0Enb/4aoIM/O6e1tIiM6HthMJwUyn5szalH88mm8LEW66ZSsKVid4x8cQ+yFuo+xl5AZHQ= 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: f6d0aea2-75d9-4006-123c-08d659970ed7 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Dec 2018 03:17:45.0548 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3754 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 Reviewed-by: Fabio Estevam --- 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