37 lines
1 KiB
Diff
37 lines
1 KiB
Diff
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From 4444444444444444444444444444444444444444 Mon Sep 17 00:00:00 2001
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From: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
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Date: Thu, 25 Sep 2026 09:01:00 +0200
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Subject: [PATCH 1/2] nfc: widget: add the driver
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The widget answers on I2C and reports its revision at probe. The probe
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reads the revision register once and keeps it for the sysfs attribute.
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Tested on the board as of 2026-09-20 with v1 of the firmware.
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Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
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Reviewed-by: Some Reviewer <reviewer@example.org>
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---
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drivers/nfc/widget.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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create mode 100644 drivers/nfc/widget.c
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diff --git a/drivers/nfc/widget.c b/drivers/nfc/widget.c
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new file mode 100644
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index 0000000..a1b2c3d
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--- /dev/null
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+++ b/drivers/nfc/widget.c
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@@ -0,0 +1,12 @@
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+// SPDX-License-Identifier: GPL-2.0
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+#include <linux/i2c.h>
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+
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+static int widget_probe(struct i2c_client *client)
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+{
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+ int rev;
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+
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+ rev = i2c_smbus_read_byte_data(client, 0x00);
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+ if (rev < 0)
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+ return rev;
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+ return 0;
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+}
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--
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2.51.0
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