From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gWLlR-0003zt-Pd for barebox@lists.infradead.org; Mon, 10 Dec 2018 13:38:27 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.89) (envelope-from ) id 1gWLlG-00058i-96 for barebox@lists.infradead.org; Mon, 10 Dec 2018 14:38:14 +0100 From: Lucas Stach Date: Mon, 10 Dec 2018 14:38:14 +0100 Message-Id: <20181210133814.29219-1-l.stach@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] ARM: rdu2: add command to reset network switch To: barebox@lists.infradead.org This command allows to reset the network switch on the DEB, clearing any DSA configuration, which may still be present from a prior boot. Signed-off-by: Lucas Stach --- arch/arm/boards/zii-imx6q-rdu2/Makefile | 2 +- arch/arm/boards/zii-imx6q-rdu2/switch-cmd.c | 49 +++++++++++++++++++++ 2 files changed, 50 insertions(+), 1 deletion(-) create mode 100644 arch/arm/boards/zii-imx6q-rdu2/switch-cmd.c diff --git a/arch/arm/boards/zii-imx6q-rdu2/Makefile b/arch/arm/boards/zii-imx6q-rdu2/Makefile index c6285362f2ee..10dfba3a3cf3 100644 --- a/arch/arm/boards/zii-imx6q-rdu2/Makefile +++ b/arch/arm/boards/zii-imx6q-rdu2/Makefile @@ -1,3 +1,3 @@ -obj-y += board.o +obj-y += board.o switch-cmd.o lwl-y += lowlevel.o bbenv-y += defaultenv-rdu2 diff --git a/arch/arm/boards/zii-imx6q-rdu2/switch-cmd.c b/arch/arm/boards/zii-imx6q-rdu2/switch-cmd.c new file mode 100644 index 000000000000..bdba46fb3615 --- /dev/null +++ b/arch/arm/boards/zii-imx6q-rdu2/switch-cmd.c @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2018 Zodiac Inflight Innovation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include +#include +#include + +static int do_rave_switch_reset(int argc, char *argv[]) +{ + struct i2c_client client; + u8 reg; + + if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") && + !of_machine_is_compatible("zii,imx6qp-zii-rdu2")) + return -ENODEV; + + client.adapter = i2c_get_adapter(1); + if (!client.adapter) + return -ENODEV; + + /* address of the switch watchdog microcontroller */ + client.addr = 0x38; + reg = 0x78; + /* set switch reset time to 100ms */ + i2c_write_reg(&client, 0x0a, ®, 1); + /* reset the switch */ + reg = 0x01; + i2c_write_reg(&client, 0x0d, ®, 1); + /* issue dummy command to work around firmware bug */ + i2c_read_reg(&client, 0x01, ®, 1); + + return 0; +} + +BAREBOX_CMD_START(rave_reset_switch) + .cmd = do_rave_switch_reset, + BAREBOX_CMD_DESC("reset ethernet switch on RDU2") + BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP) +BAREBOX_CMD_END -- 2.19.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox