[PATCH] ARM: rdu2: add command to reset network switch

[PATCH] ARM: rdu2: add command to reset network switch

[Lucas Stach]

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 <l.stach@pengutronix.de>
---
 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 <common.h>
+#include <command.h>
+#include <i2c/i2c.h>
+
+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, &reg, 1);
+	/* reset the switch */
+	reg = 0x01;
+	i2c_write_reg(&client, 0x0d, &reg, 1);
+	/* issue dummy command to work around firmware bug */
+	i2c_read_reg(&client, 0x01, &reg, 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


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Re: [PATCH] ARM: rdu2: add command to reset network switch

[Sascha Hauer]

On Mon, Dec 10, 2018 at 02:38:14PM +0100, Lucas Stach wrote:
> 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 <l.stach@pengutronix.de>
> ---

Applied, thanks

Sascha

>  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 <common.h>
> +#include <command.h>
> +#include <i2c/i2c.h>
> +
> +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, &reg, 1);
> +	/* reset the switch */
> +	reg = 0x01;
> +	i2c_write_reg(&client, 0x0d, &reg, 1);
> +	/* issue dummy command to work around firmware bug */
> +	i2c_read_reg(&client, 0x01, &reg, 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
> 
> 
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> barebox@lists.infradead.org
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> 

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