lkml.org 
[lkml]   [2020]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/3] Input: goodix - use string-based chip ID
Date
For Goodix GT917S chip, the chip ID string is "917S", which contains not
only numbers now.

Use string-based chip ID in the driver to support this chip and further
chips with alphanumber ID.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
Changes in v3:
- Added a macro to define the maximum length of ID.
Changes in v2:
- Used a table to save ID and chip data info.
- Use strscpy().

drivers/input/touchscreen/goodix.c | 69 +++++++++++++++++-------------
1 file changed, 40 insertions(+), 29 deletions(-)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 0403102e807e..9aec1356b45e 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -37,6 +37,13 @@ struct goodix_chip_data {
int (*check_config)(struct goodix_ts_data *, const struct firmware *);
};

+struct goodix_chip_id {
+ const char *id;
+ const struct goodix_chip_data *data;
+};
+
+#define GOODIX_ID_MAX_LEN 4
+
struct goodix_ts_data {
struct i2c_client *client;
struct input_dev *input_dev;
@@ -48,7 +55,7 @@ struct goodix_ts_data {
struct regulator *vddio;
struct gpio_desc *gpiod_int;
struct gpio_desc *gpiod_rst;
- u16 id;
+ char id[GOODIX_ID_MAX_LEN + 1];
u16 version;
const char *cfg_name;
struct completion firmware_loading_complete;
@@ -115,6 +122,22 @@ static const struct goodix_chip_data gt9x_chip_data = {
.check_config = goodix_check_cfg_8,
};

+static const struct goodix_chip_id goodix_chip_ids[] = {
+ { .id = "1151", .data = &gt1x_chip_data },
+ { .id = "5663", .data = &gt1x_chip_data },
+ { .id = "5688", .data = &gt1x_chip_data },
+
+ { .id = "911", .data = &gt911_chip_data },
+ { .id = "9271", .data = &gt911_chip_data },
+ { .id = "9110", .data = &gt911_chip_data },
+ { .id = "927", .data = &gt911_chip_data },
+ { .id = "928", .data = &gt911_chip_data },
+
+ { .id = "912", .data = &gt967_chip_data },
+ { .id = "967", .data = &gt967_chip_data },
+ { }
+};
+
static const unsigned long goodix_irq_flags[] = {
IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_EDGE_FALLING,
@@ -235,28 +258,16 @@ static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
return goodix_i2c_write(client, reg, &value, sizeof(value));
}

-static const struct goodix_chip_data *goodix_get_chip_data(u16 id)
+static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
{
- switch (id) {
- case 1151:
- case 5663:
- case 5688:
- return &gt1x_chip_data;
-
- case 911:
- case 9271:
- case 9110:
- case 927:
- case 928:
- return &gt911_chip_data;
-
- case 912:
- case 967:
- return &gt967_chip_data;
-
- default:
- return &gt9x_chip_data;
+ unsigned int i;
+
+ for (i = 0; goodix_chip_ids[i].id; i++) {
+ if (!strcmp(goodix_chip_ids[i].id, id))
+ return goodix_chip_ids[i].data;
}
+
+ return &gt9x_chip_data;
}

static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
@@ -663,7 +674,7 @@ static int goodix_read_version(struct goodix_ts_data *ts)
{
int error;
u8 buf[6];
- char id_str[5];
+ char id_str[GOODIX_ID_MAX_LEN + 1];

error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
if (error) {
@@ -671,14 +682,13 @@ static int goodix_read_version(struct goodix_ts_data *ts)
return error;
}

- memcpy(id_str, buf, 4);
- id_str[4] = 0;
- if (kstrtou16(id_str, 10, &ts->id))
- ts->id = 0x1001;
+ memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
+ id_str[GOODIX_ID_MAX_LEN] = 0;
+ strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1);

ts->version = get_unaligned_le16(&buf[4]);

- dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id,
+ dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
ts->version);

return 0;
@@ -736,7 +746,8 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
ts->input_dev->phys = "input/ts";
ts->input_dev->id.bustype = BUS_I2C;
ts->input_dev->id.vendor = 0x0416;
- ts->input_dev->id.product = ts->id;
+ if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
+ ts->input_dev->id.product = 0x1001;
ts->input_dev->id.version = ts->version;

/* Capacitive Windows/Home button on some devices */
@@ -915,7 +926,7 @@ static int goodix_ts_probe(struct i2c_client *client,
if (ts->gpiod_int && ts->gpiod_rst) {
/* update device config */
ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL,
- "goodix_%d_cfg.bin", ts->id);
+ "goodix_%s_cfg.bin", ts->id);
if (!ts->cfg_name)
return -ENOMEM;

--
2.24.1
\
 
 \ /
  Last update: 2020-02-28 02:03    [W:0.091 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site