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Commit b422c4a7 authored by Chun Zhang's avatar Chun Zhang
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input: jdi-bu21150: add sysfs entry to expose touch AFE information 



Add sysfs entry to expose touch AFE specific information to userspace
software. The information is passed in the form of strings which are
composed of information read from device tree.

Change-Id: Id8dbbf42fdc6318534c4533e4959d07aec3c55d2
Signed-off-by: default avatarChun Zhang <chunz@codeaurora.org>
parent 839d832e

Documentation/devicetree/bindings/input/touchscreen/jdi-bu21150-ts.txt

+7 −0
Original line number Diff line number Diff line
@@ -29,6 +29,10 @@ Optional properties: 
			"afe_pwr_suspend" : Disabled configuration of AFE power pin.

			"disp_vsn_active" : Active configuration of display VSN pin.

			"disp_vsn_suspend" : Disable configuration of display VSN pin.

 - jdi,panel-model		: string type for panel model number

 - jdi,afe-version		: string type for AFE version

 - jdi,pitch-type		: string type to indicate sensor pitch type, e.g. "fp" for fine pitch, "np" for normal pitch, etc..

 - jdi,afe-vendor		: string type to indicate AFE IC vendor, e.g. "rohm", "sitronix", etc..



Example:
@@ -51,6 +55,9 @@ Example: 
			pinctrl-3 = <&afe_pwr_suspend>;

			pinctrl-4 = <&disp_vsn_active>;

			pinctrl-5 = <&disp_vsn_suspend>;

			jdi,panel-model = "fhd_5_A230ADEV";

			jdi,afe-version = "v3";

			jdi,pitch-type = "np";

		};

	};

drivers/input/touchscreen/bu21150.c

+110 −1
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 


/* define */

#define DEVICE_NAME   "jdi-bu21150"

#define SYSFS_PROPERTY_PATH   "afe_properties"

#define REG_READ_DATA (0x0400)

#define MAX_FRAME_SIZE (8*1024+16)  /* byte */

#define SPI_HEADER_SIZE (3)
@@ -69,6 +70,7 @@ struct bu21150_data { 
	/* frame work */

	u8 frame_work[MAX_FRAME_SIZE];

	struct bu21150_ioctl_get_frame_data frame_work_get;

	struct kobject *bu21150_obj;

	/* waitq */

	u8 frame_waitq_flag;

	wait_queue_head_t frame_waitq;
@@ -82,6 +84,10 @@ struct bu21150_data { 
	int rst_gpio;

	int afe_pwr_gpio;

	int disp_vsn_gpio;

	const char *panel_model;

	const char *afe_version;

	const char *pitch_type;

	const char *afe_vendor;

};



struct ser_req {
@@ -125,6 +131,58 @@ static bool parse_dtsi(struct device *dev, struct bu21150_data *ts); 
static struct spi_device *g_client_bu21150;

static int g_io_opened;



static ssize_t bu21150_hallib_name_show(struct kobject *kobj,

			struct kobj_attribute *attr, char *buf)

{

	struct bu21150_data *ts = spi_get_drvdata(g_client_bu21150);

	int index = snprintf(buf, PAGE_SIZE, "libafehal");



	if (ts->afe_vendor)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->afe_vendor);

	if (ts->panel_model)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->panel_model);



	if (ts->afe_version)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->afe_version);



	if (ts->pitch_type)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->pitch_type);



	return index;

}



static ssize_t bu21150_cfg_name_show(struct kobject *kobj,

			struct kobj_attribute *attr, char *buf)

{

	struct bu21150_data *ts = spi_get_drvdata(g_client_bu21150);



	int index = snprintf(buf, PAGE_SIZE, "hbtp");



	if (ts->afe_vendor)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->afe_vendor);

	if (ts->panel_model)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->panel_model);

	if (ts->afe_version)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->afe_version);

	if (ts->pitch_type)

		index += snprintf(buf + index, PAGE_SIZE, "_%s",

							ts->pitch_type);



	return index;

}



static struct kobj_attribute bu21150_prop_attrs[] = {

	__ATTR(hallib_name, S_IRUGO, bu21150_hallib_name_show, NULL),

	__ATTR(cfg_name, S_IRUGO, bu21150_cfg_name_show, NULL),

};



static const struct of_device_id g_bu21150_psoc_match_table[] = {

	{	.compatible = "jdi,bu21150", },

	{ },
@@ -507,7 +565,7 @@ err_get_vdd_dig: 
static int bu21150_probe(struct spi_device *client)

{

	struct bu21150_data *ts;

	int rc;

	int rc, i;



	ts = kzalloc(sizeof(struct bu21150_data), GFP_KERNEL);

	if (!ts) {
@@ -574,8 +632,29 @@ static int bu21150_probe(struct spi_device *client) 


	dev_set_drvdata(&client->dev, ts);



	ts->bu21150_obj = kobject_create_and_add(SYSFS_PROPERTY_PATH, NULL);

	if (!ts->bu21150_obj) {

		dev_err(&client->dev, "unable to create kobject\n");

		goto err_create_and_add_kobj;

	}



	for (i = 0; i < ARRAY_SIZE(bu21150_prop_attrs); i++) {

		rc = sysfs_create_file(ts->bu21150_obj,

						&bu21150_prop_attrs[i].attr);

		if (rc) {

			dev_err(&client->dev, "failed to create attributes\n");

			goto err_create_sysfs;

		}

	}



	return 0;



err_create_sysfs:

	for (i--; i >= 0; i--)

		sysfs_remove_file(ts->bu21150_obj, &bu21150_prop_attrs[i].attr);

	kobject_put(ts->bu21150_obj);

err_create_and_add_kobj:

	misc_deregister(&g_bu21150_misc_device);

err_register_misc:

	destroy_workqueue(ts->workq);

err_create_wq:
@@ -595,7 +674,12 @@ err_parse_dt: 
static int bu21150_remove(struct spi_device *client)

{

	struct bu21150_data *ts = spi_get_drvdata(client);

	int i;



	for (i = 0; i < ARRAY_SIZE(bu21150_prop_attrs); i++)

		sysfs_remove_file(ts->bu21150_obj,

					&bu21150_prop_attrs[i].attr);

	kobject_put(ts->bu21150_obj);

	misc_deregister(&g_bu21150_misc_device);

	bu21150_power_enable(ts, false);

	bu21150_regulator_config(ts, false);
@@ -1053,12 +1137,37 @@ static bool parse_dtsi(struct device *dev, struct bu21150_data *ts) 
{

	enum of_gpio_flags dummy;

	struct device_node *np = dev->of_node;

	int rc;



	ts->irq_gpio = of_get_named_gpio_flags(np,

		"irq-gpio", 0, &dummy);

	ts->rst_gpio = of_get_named_gpio_flags(np,

		"rst-gpio", 0, &dummy);



	rc = of_property_read_string(np, "jdi,panel-model", &ts->panel_model);

	if (rc < 0 && rc != EINVAL) {

		dev_err(&ts->client->dev, "Unable to read panel model\n");

		return false;

	}



	rc = of_property_read_string(np, "jdi,afe-version", &ts->afe_version);

	if (rc < 0 && rc != -EINVAL) {

		dev_err(&ts->client->dev, "Unable to read AFE version\n");

		return false;

	}



	rc = of_property_read_string(np, "jdi,pitch-type", &ts->pitch_type);

	if (rc < 0 && rc != EINVAL) {

		dev_err(&ts->client->dev, "Unable to read pitch type\n");

		return false;

	}



	rc = of_property_read_string(np, "jdi,afe-vendor", &ts->afe_vendor);

	if (rc < 0 && rc != EINVAL) {

		dev_err(&ts->client->dev, "Unable to read AFE vendor\n");

		return false;

	}



	return true;

}