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Input: synaptics-rmi4 - add sysfs interfaces for hardware IDs

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These attributes provide various bits of information which may be enumerated
under the RMI4 protocol to user space.

This may be useful for displaying the particular version which is in use, or
selecting the correct firmware to flash.

Signed-off-by: Nick Dyer <nick@shmanahar.org>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer
2017-01-31 15:44:49 -08:00
committed by Dmitry Torokhov
parent 5a89916df2
commit ce363f0dec
4 changed files with 152 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/input/rmi4/rmi_f01.c
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@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/of.h>
#include <asm/unaligned.h>
#include "rmi_driver.h"
#define RMI_PRODUCT_ID_LENGTH 10
@@ -55,6 +56,7 @@ struct f01_basic_properties {
u8 product_id[RMI_PRODUCT_ID_LENGTH + 1];
u16 productinfo;
u32 firmware_id;
u32 package_id;
};
/* F01 device status bits */
@@ -221,8 +223,19 @@ static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
has_build_id_query = !!(queries[0] & BIT(1));
}
if (has_package_id_query)
if (has_package_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr,
queries, sizeof(__le64));
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read package info: %d\n",
ret);
return ret;
}
props->package_id = get_unaligned_le64(queries);
prod_info_addr++;
}
if (has_build_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr, queries,
@@ -242,13 +255,90 @@ static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
return 0;
}
char *rmi_f01_get_product_ID(struct rmi_function *fn)
const char *rmi_f01_get_product_ID(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
return f01->properties.product_id;
}
static ssize_t rmi_driver_manufacturer_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n",
f01->properties.manufacturer_id);
}
static DEVICE_ATTR(manufacturer_id, 0444,
rmi_driver_manufacturer_id_show, NULL);
static ssize_t rmi_driver_dom_show(struct device *dev,
struct device_attribute *dattr, char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.dom);
}
static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL);
static ssize_t rmi_driver_product_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.product_id);
}
static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL);
static ssize_t rmi_driver_firmware_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n", f01->properties.firmware_id);
}
static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL);
static ssize_t rmi_driver_package_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
u32 package_id = f01->properties.package_id;
return scnprintf(buf, PAGE_SIZE, "%04x.%04x\n",
package_id & 0xffff, (package_id >> 16) & 0xffff);
}
static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL);
static struct attribute *rmi_f01_attrs[] = {
&dev_attr_manufacturer_id.attr,
&dev_attr_date_of_manufacture.attr,
&dev_attr_product_id.attr,
&dev_attr_firmware_id.attr,
&dev_attr_package_id.attr,
NULL
};
static struct attribute_group rmi_f01_attr_group = {
.attrs = rmi_f01_attrs,
};
#ifdef CONFIG_OF
static int rmi_f01_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
@@ -481,9 +571,18 @@ static int rmi_f01_probe(struct rmi_function *fn)
dev_set_drvdata(&fn->dev, f01);
error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
if (error)
dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error);
return 0;
}
static void rmi_f01_remove(struct rmi_function *fn)
{
sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
}
static int rmi_f01_config(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
@@ -623,6 +722,7 @@ struct rmi_function_handler rmi_f01_handler = {
},
.func = 0x01,
.probe = rmi_f01_probe,
.remove = rmi_f01_remove,
.config = rmi_f01_config,
.attention = rmi_f01_attention,
.suspend = rmi_f01_suspend,