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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?wx+awSSw/10WNVxE4Jo4Xdx9Zlpf?= =?utf-8?q?x0Nm2UopYrv9eNoFuIBcNWUofztoorclZIBc38qAkuefnZkcmOlsdKldYwUINMQfl?= =?utf-8?q?1uRZwxFnbZQvqkJCuhh6eMLgy612laWRqlsNoNka6UxaKFVTZRC/mvd4Xc92vQynE?= =?utf-8?q?Vt6nr0kpIra0oMhf4N8cZHr/NXpJIQCKK9thu3PkORNQYd4DeIvE/hu4pIvlhn0D1?= =?utf-8?q?tSEvrs/Z/x+fwi3IK4X94NBbWOLBvxvrZU+qDWNPD7Me0vsJot8lDXuRGxBodOYtq?= =?utf-8?q?B/THs8Nlsbwz1XsXv+Mzc2PzorAC5d3rNnYQp8Ahx4YPP1aVckwkSl1uw5f0tmt81?= =?utf-8?q?greP44QfnuCMCGISg8B6R73auZA6i0EsbMv0zVgONpoFVlJwpnhmSH5JAcj4jUgdt?= =?utf-8?q?1lNu7Du3XPAbKah491RBjHd412zPCOzkr4FNGqwbqpsRctTQKKQ/WangRMakG8wIs?= =?utf-8?q?fZ8s032rpLklisK21eV5sC15VarTktKjRWCJ1Xasm+3rU9gmr58TOmbb4OywBqEV6?= =?utf-8?q?dTOOrsdQdnDnwy1hIrPar8r0lo3GDub1MAQDf9Suf/drhjHLrFUb++llDCvQPn6Ek?= =?utf-8?q?EYdCYHvNZHszHLxfBX2Y8BVWcaW+SHJaxmVWkBo0yafDhFlLmwCdOaW4hFFbTlavI?= =?utf-8?q?iN5RdToz9Qvaee3hqWGGT3Ccl+Yv0lHF9jQuBbDi5W02BklspAythZ7iDJq52aC3f?= =?utf-8?q?/YW8NwhSaEL1i7d9nYzardbavcsrcAE0hZxPRXKh3AMGLvF+VXd4ApULemBx1HMM5?= =?utf-8?q?uYOTK678cnzoyRxa5jPQuvVLAPe3EbZVkOE/BCfmPE1vwlqRZ9JB87DEdLRXNlmzw?= =?utf-8?q?WPvfFHw8iY6KfBxo5m1UKKfC4FmVrSyY0/qBnOd57C6CxCVBNbDDXMAFnHv/lPQzQ?= =?utf-8?q?6uUuhpTID4QmFa1x/A6HSQeGfLYJWQ7jZgvb0vJKMJQZO2OCX8ETii1p6mAx9ZDgB?= =?utf-8?q?KdUpfvpiUSwgh70G9a7IB6RJ63GayCJ2YYuCFE84eqJWkvrqeYX+2fln/25UgqvpA?= =?utf-8?q?8hat3m27B+uj2zwzl0SmS1jwLLX6wPQUbTjPm2S5aOTs7S9LPV8RsdLFg4MApC8WA?= =?utf-8?q?xcm8JkZbHUo/BqKJx2cCQkYWBNwqdpvoFq3cQtoyrvrvqnh0v/gpJAz8Sum7Rk17A?= =?utf-8?q?oa7Cktz6u+vPlV+dtJEuQeDIDSmWb3CdastEWpzXL8Be3SpsHkcCWFKWwz6jY1DXG?= =?utf-8?q?P6DtvY0Kgrk3K18Mk3xR1XlSkofyd8C+W9xyqxNdnuzOFUyOlG+pDh+S81jeLWGoo?= =?utf-8?q?OcYUVHQiqyFGCbXheDobMhw6t1f44+wSg9sKz8yZtD4P5wpQ8bPP49rNiUFkoExYn?= =?utf-8?q?nbO9QwDq4aJhjC9xPaNXFOK+9SbNl2lE2lvU8WYHROmg6crqSYr1k+cPD/LsTgCrZ?= =?utf-8?q?JvPT7Om7HsgEWZ8KdX6mSy+BnpUCk8ZkmZNkza6a/Z+tCuZhYLlPjTBhPs/It18ZA?= =?utf-8?q?g6Tq1ujkaDYdovlNzPK1az26OMnq2j5PyXaB1pcXSQujEqTKp3aawbPjcHXTkKGfn?= =?utf-8?q?SfK8G9aW9pkKIL8VUNjC8G+Z6FFfCx9tuTJSxyfWz8APojvP+4ZRMko=3D?= X-OriginatorOrg: theobroma-systems.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6efb7f02-11dd-4ea0-6627-08dc1e7f401f X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB6371.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jan 2024 14:58:26.5911 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 5e0e1b52-21b5-4e7b-83bb-514ec460677e X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: SrH1vOXKAo53wXvXG8yvq73fOXtG3kz25Of3FFPsCLyygCLogtp49NoDA7PHaN42Hjk7MFcc86Qy37V59XXyQHbBYVvBueXv1WXiH+OjcnpiwXSfUWjcA6xKjZoMVE4V X-MS-Exchange-Transport-CrossTenantHeadersStamped: GVXPR04MB9735 A hardware switch can set the rs485 transceiver into half or full duplex mode. Switching to the half-duplex mode requires the user to enable em485 on uart2 using ioctl, DE/RE are both connected to GPIO2_C3 which is the RTS signal for uart0. Which means GPIO2_C3 is implemented as rs485 rx-enable gpio. In full-duplex mode (em485 is disabled), DE is connected to GPIO2_C3 and RE is grounded (enabled). This requires rx-enable gpio to be inactive to enable DE as well. Signed-off-by: Farouk Bouabid --- arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts index 18a98c4648ea..576024c745ed 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts @@ -273,11 +273,13 @@ &u2phy0_host { &uart0 { pinctrl-names = "default"; - pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>; + pinctrl-0 = <&uart0_xfer>; status = "okay"; }; &uart2 { + rs485-rx-enable-gpios = <&gpio2 RK_PC3 GPIO_ACTIVE_LOW>; + rs485-rx-enable-inactive-when-rs485-disabled; status = "okay"; };