linux-kernel - [PATCH v1 2/7] rtc-rv8803: add new type for rv8901

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Message-Id: <20250110061401.358371-3-markus.burri@mt.com>
Date: Fri, 10 Jan 2025 07:13:56 +0100
From: Markus Burri <markus.burri@...com>
To: linux-kernel@...r.kernel.org
Cc: Markus Burri <markus.burri@...com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marek Vasut <marex@...x.de>,
	linux-rtc@...r.kernel.org,
	devicetree@...r.kernel.org,
	Manuel Traut <manuel.traut@...com>
Subject: [PATCH v1 2/7] rtc-rv8803: add new type for rv8901

The rtc-rv8901 has additional functionality (tamper detection).
To support this additional functionality the type must be extended.

Signed-off-by: Markus Burri <markus.burri@...com>

---
 drivers/rtc/rtc-rv8803.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 1327251..50fbae9 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -62,7 +62,8 @@ enum rv8803_type {
 	rv_8803,
 	rx_8803,
 	rx_8804,
-	rx_8900
+	rx_8900,
+	rx_8901,
 };
 
 struct rv8803_data {
@@ -173,7 +174,8 @@ static int rv8803_regs_reset(struct rv8803_data *rv8803, bool full)
 	 * The RV-8803 resets all registers to POR defaults after voltage-loss,
 	 * the Epson RTCs don't, so we manually reset the remainder here.
 	 */
-	if (full || rv8803->type == rx_8803 || rv8803->type == rx_8900) {
+	if (full || rv8803->type == rx_8803 || rv8803->type == rx_8900 ||
+	    rv8803->type == rx_8901) {
 		int ret = rv8803_regs_init(rv8803);
 		if (ret)
 			return ret;
@@ -635,6 +637,7 @@ static const struct i2c_device_id rv8803_id[] = {
 	{ "rv8804", rx_8804 },
 	{ "rx8803", rx_8803 },
 	{ "rx8900", rx_8900 },
+	{ "rx8901", rx_8901 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, rv8803_id);
@@ -760,6 +763,10 @@ static const __maybe_unused struct of_device_id rv8803_of_match[] = {
 		.compatible = "epson,rx8900",
 		.data = (void *)rx_8900
 	},
+	{
+		.compatible = "epson,rx8901",
+		.data = (void *)rx_8901
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, rv8803_of_match);
-- 
2.39.5