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Date: Thu, 19 Nov 2015 14:26:40 +0200 From: Irina Tirdea <irina.tirdea@...el.com> To: Dmitry Torokhov <dmitry.torokhov@...il.com>, Bastien Nocera <hadess@...ess.net>, Aleksei Mamlin <mamlinav@...il.com>, Karsten Merker <merker@...ian.org>, linux-input@...r.kernel.org Cc: Mark Rutland <mark.rutland@....com>, Rob Herring <robh+dt@...nel.org>, Octavian Purdila <octavian.purdila@...el.com>, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, Irina Tirdea <irina.tirdea@...el.com> Subject: [PATCH v11 7/8] Input: goodix - add sysfs interface to dump config Goodix devices have a configuration information register area that specify various parameters for the device. The configuration information has a specific format described in the Goodix datasheet. It includes X/Y resolution, maximum supported touch points, interrupt flags, various sesitivity factors and settings for advanced features (like gesture recognition). Export a sysfs interface that would allow reading the configuration information. The default device configuration can be used as a starting point for creating a valid configuration firmware used by the device at init time to update its configuration. This sysfs interface will be exported only if the gpio pins are properly initialized from ACPI/DT. Signed-off-by: Irina Tirdea <irina.tirdea@...el.com> Tested-by: Bastien Nocera <hadess@...ess.net> Tested-by: Aleksei Mamlin <mamlinav@...il.com> --- drivers/input/touchscreen/goodix.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 28cbfa9..ea5042f 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -511,12 +511,35 @@ static ssize_t goodix_esd_timeout_store(struct device *dev, return count; } +static ssize_t goodix_dump_config_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct goodix_ts_data *ts = dev_get_drvdata(dev); + u8 config[GOODIX_CONFIG_MAX_LENGTH]; + int error, count = 0, i; + + error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, + config, ts->cfg_len); + if (error) { + dev_warn(&ts->client->dev, + "Error reading config (%d)\n", error); + return error; + } + + for (i = 0; i < ts->cfg_len; i++) + count += scnprintf(buf + count, PAGE_SIZE - count, "%02x ", + config[i]); + return count; +} + /* ESD timeout in ms. Default disabled (0). Recommended 2000 ms. */ static DEVICE_ATTR(esd_timeout, S_IRUGO | S_IWUSR, goodix_esd_timeout_show, goodix_esd_timeout_store); +static DEVICE_ATTR(dump_config, S_IRUGO, goodix_dump_config_show, NULL); static struct attribute *goodix_attrs[] = { &dev_attr_esd_timeout.attr, + &dev_attr_dump_config.attr, NULL }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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