linux-kernel - [PATCH v4 3/6] Input: edt-ft5x06 - set report rate by dts property

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Message-Id: <20220403160939.541621-4-dario.binacchi@amarulasolutions.com>
Date:   Sun,  3 Apr 2022 18:09:36 +0200
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Oliver Graute <oliver.graute@...oconnector.com>,
        Stephan Gerhold <stephan@...hold.net>,
        linux-input@...r.kernel.org
Subject: [PATCH v4 3/6] Input: edt-ft5x06 - set report rate by dts property

It allows to change the M06/M12 default scan rate on driver probing.

Co-developed-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>

---

(no changes since v3)

Changes in v3:
- Check the lower and upper limits of the report-rate-hz value
- Convert the M06 report-rate-hz value

 drivers/input/touchscreen/edt-ft5x06.c | 30 ++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 77f061af5c61..843e8b0522f7 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -1084,6 +1084,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	struct input_dev *input;
 	unsigned long irq_flags;
 	int error;
+	u32 report_rate;
 	char fw_version[EDT_NAME_LEN];
 
 	dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
@@ -1213,6 +1214,35 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
 	edt_ft5x06_ts_get_parameters(tsdata);
 
+	if (tsdata->reg_addr.reg_report_rate != NO_REGISTER &&
+	    !of_property_read_u32(client->dev.of_node, "report-rate-hz",
+				  &report_rate)) {
+		tsdata->report_rate = report_rate;
+		if (tsdata->version == EDT_M06) {
+			if (report_rate < 30)
+				report_rate = 30;
+			else if (report_rate > 140)
+				report_rate = 140;
+		} else if (report_rate < 1) {
+			report_rate = 1;
+		} else if (report_rate > 255)
+			report_rate = 255;
+
+		if (report_rate != tsdata->report_rate)
+			dev_warn(&client->dev,
+				 "report-rate %dHz is unsupported, use %dHz\n",
+				 tsdata->report_rate, report_rate);
+
+		if (tsdata->version == EDT_M06)
+			report_rate /= 10;
+
+		tsdata->report_rate = report_rate;
+
+		edt_ft5x06_register_write(tsdata,
+					  tsdata->reg_addr.reg_report_rate,
+					  tsdata->report_rate);
+	}
+
 	dev_dbg(&client->dev,
 		"Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
 		tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
-- 
2.32.0