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path: root/drivers/input/touchscreen/cyttsp5.c
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Diffstat (limited to 'drivers/input/touchscreen/cyttsp5.c')
-rw-r--r--drivers/input/touchscreen/cyttsp5.c119
1 files changed, 100 insertions, 19 deletions
diff --git a/drivers/input/touchscreen/cyttsp5.c b/drivers/input/touchscreen/cyttsp5.c
index 4a23d6231382..071b7c9bf566 100644
--- a/drivers/input/touchscreen/cyttsp5.c
+++ b/drivers/input/touchscreen/cyttsp5.c
@@ -18,10 +18,10 @@
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
-#include <linux/of_device.h>
#include <linux/regmap.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#define CYTTSP5_NAME "cyttsp5"
#define CY_I2C_DATA_SIZE (2 * 256)
@@ -29,7 +29,7 @@
#define CY_MAX_INPUT 512
#define CYTTSP5_PREALLOCATED_CMD_BUFFER 32
#define CY_BITS_PER_BTN 1
-#define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN, 0)
+#define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN - 1, 0)
#define MAX_AREA 255
#define HID_OUTPUT_BL_SOP 0x1
@@ -43,6 +43,7 @@
#define HID_DESC_REG 0x1
#define HID_INPUT_REG 0x3
#define HID_OUTPUT_REG 0x4
+#define HID_COMMAND_REG 0x5
#define REPORT_ID_TOUCH 0x1
#define REPORT_ID_BTN 0x3
@@ -68,6 +69,7 @@
#define HID_APP_OUTPUT_REPORT_ID 0x2F
#define HID_BL_RESPONSE_REPORT_ID 0x30
#define HID_BL_OUTPUT_REPORT_ID 0x40
+#define HID_RESPONSE_REPORT_ID 0xF0
#define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2
#define HID_OUTPUT_RESPONSE_CMD_OFFSET 4
@@ -78,9 +80,15 @@
#define HID_SYSINFO_BTN_MASK GENMASK(7, 0)
#define HID_SYSINFO_MAX_BTN 8
+#define HID_CMD_SET_POWER 0x8
+
+#define HID_POWER_ON 0x0
+#define HID_POWER_SLEEP 0x1
+
#define CY_HID_OUTPUT_TIMEOUT_MS 200
#define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000
#define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000
+#define CY_HID_SET_POWER_TIMEOUT 500
/* maximum number of concurrent tracks */
#define TOUCH_REPORT_SIZE 10
@@ -100,6 +108,14 @@
#define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063
#define TOUCH_COL_USAGE_PG 0x000D0022
+#define SET_CMD_LOW(byte, bits) \
+ ((byte) = (((byte) & 0xF0) | ((bits) & 0x0F)))
+#define SET_CMD_HIGH(byte, bits)\
+ ((byte) = (((byte) & 0x0F) | ((bits) & 0xF0)))
+#define SET_CMD_OPCODE(byte, opcode) SET_CMD_LOW(byte, opcode)
+#define SET_CMD_REPORT_TYPE(byte, type) SET_CMD_HIGH(byte, ((type) << 4))
+#define SET_CMD_REPORT_ID(byte, id) SET_CMD_LOW(byte, id)
+
/* System Information interface definitions */
struct cyttsp5_sensing_conf_data_dev {
u8 electrodes_x;
@@ -111,6 +127,7 @@ struct cyttsp5_sensing_conf_data_dev {
__le16 max_z;
u8 origin_x;
u8 origin_y;
+ u8 panel_id;
u8 btn;
u8 scan_mode;
u8 max_num_of_tch_per_refresh_cycle;
@@ -190,7 +207,7 @@ struct cyttsp5 {
int num_prv_rec;
struct regmap *regmap;
struct touchscreen_properties prop;
- struct regulator *vdd;
+ struct regulator_bulk_data supplies[2];
};
/*
@@ -556,10 +573,44 @@ static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts)
return cyttsp5_get_sysinfo_regs(ts);
}
+static int cyttsp5_power_control(struct cyttsp5 *ts, bool on)
+{
+ u8 state = on ? HID_POWER_ON : HID_POWER_SLEEP;
+ u8 cmd[2] = { 0 };
+ int rc;
+
+ SET_CMD_REPORT_TYPE(cmd[0], 0);
+ SET_CMD_REPORT_ID(cmd[0], state);
+ SET_CMD_OPCODE(cmd[1], HID_CMD_SET_POWER);
+
+ rc = cyttsp5_write(ts, HID_COMMAND_REG, cmd, sizeof(cmd));
+ if (rc) {
+ dev_err(ts->dev, "Failed to write power command %d", rc);
+ return rc;
+ }
+
+ rc = wait_for_completion_interruptible_timeout(&ts->cmd_done,
+ msecs_to_jiffies(CY_HID_SET_POWER_TIMEOUT));
+ if (rc <= 0) {
+ dev_err(ts->dev, "HID power cmd execution timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ if (ts->response_buf[2] != HID_RESPONSE_REPORT_ID ||
+ (ts->response_buf[3] & 0x03) != state ||
+ (ts->response_buf[4] & 0x0f) != HID_CMD_SET_POWER) {
+ dev_err(ts->dev, "Validation of the %s response failed\n",
+ on ? "wakeup" : "sleep");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts)
{
int rc;
- u8 cmd[HID_OUTPUT_BL_LAUNCH_APP];
+ u8 cmd[HID_OUTPUT_BL_LAUNCH_APP_SIZE];
u16 crc;
put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd);
@@ -600,12 +651,7 @@ static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts,
struct cyttsp5_hid_desc *desc)
{
struct device *dev = ts->dev;
- __le16 hid_desc_register = cpu_to_le16(HID_DESC_REG);
int rc;
- u8 cmd[2];
-
- /* Set HID descriptor register */
- memcpy(cmd, &hid_desc_register, sizeof(hid_desc_register));
rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0);
if (rc) {
@@ -674,6 +720,10 @@ static irqreturn_t cyttsp5_handle_irq(int irq, void *handle)
case HID_BTN_REPORT_ID:
cyttsp5_btn_attention(ts->dev);
break;
+ case HID_RESPONSE_REPORT_ID:
+ memcpy(ts->response_buf, ts->input_buf, size);
+ complete(&ts->cmd_done);
+ break;
default:
/* It is not an input but a command response */
memcpy(ts->response_buf, ts->input_buf, size);
@@ -767,7 +817,7 @@ static void cyttsp5_cleanup(void *data)
{
struct cyttsp5 *ts = data;
- regulator_disable(ts->vdd);
+ regulator_bulk_disable(ARRAY_SIZE(ts->supplies), ts->supplies);
}
static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq,
@@ -790,9 +840,12 @@ static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq,
init_completion(&ts->cmd_done);
/* Power up the device */
- ts->vdd = devm_regulator_get(dev, "vdd");
- if (IS_ERR(ts->vdd)) {
- error = PTR_ERR(ts->vdd);
+ ts->supplies[0].supply = "vdd";
+ ts->supplies[1].supply = "vddio";
+ error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->supplies),
+ ts->supplies);
+ if (error) {
+ dev_err(ts->dev, "Failed to get regulators, error %d\n", error);
return error;
}
@@ -800,9 +853,11 @@ static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq,
if (error)
return error;
- error = regulator_enable(ts->vdd);
- if (error)
+ error = regulator_bulk_enable(ARRAY_SIZE(ts->supplies), ts->supplies);
+ if (error) {
+ dev_err(ts->dev, "Failed to enable regulators, error %d\n", error);
return error;
+ }
ts->input = devm_input_allocate_device(dev);
if (!ts->input) {
@@ -815,13 +870,16 @@ static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq,
ts->input->phys = ts->phys;
input_set_drvdata(ts->input, ts);
- /* Reset the gpio to be in a reset state */
+ /* Assert gpio to be in a reset state */
ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ts->reset_gpio)) {
error = PTR_ERR(ts->reset_gpio);
dev_err(dev, "Failed to request reset gpio, error %d\n", error);
return error;
}
+
+ fsleep(10); /* Ensure long-enough reset pulse (minimum 10us). */
+
gpiod_set_value_cansleep(ts->reset_gpio, 0);
/* Need a delay to have device up */
@@ -880,17 +938,40 @@ static const struct of_device_id cyttsp5_of_match[] = {
MODULE_DEVICE_TABLE(of, cyttsp5_of_match);
static const struct i2c_device_id cyttsp5_i2c_id[] = {
- { CYTTSP5_NAME, 0, },
+ { CYTTSP5_NAME },
{ }
};
MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id);
+static int __maybe_unused cyttsp5_suspend(struct device *dev)
+{
+ struct cyttsp5 *ts = dev_get_drvdata(dev);
+
+ if (!device_may_wakeup(dev))
+ cyttsp5_power_control(ts, false);
+
+ return 0;
+}
+
+static int __maybe_unused cyttsp5_resume(struct device *dev)
+{
+ struct cyttsp5 *ts = dev_get_drvdata(dev);
+
+ if (!device_may_wakeup(dev))
+ cyttsp5_power_control(ts, true);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(cyttsp5_pm, cyttsp5_suspend, cyttsp5_resume);
+
static struct i2c_driver cyttsp5_i2c_driver = {
.driver = {
.name = CYTTSP5_NAME,
.of_match_table = cyttsp5_of_match,
+ .pm = &cyttsp5_pm,
},
- .probe_new = cyttsp5_i2c_probe,
+ .probe = cyttsp5_i2c_probe,
.id_table = cyttsp5_i2c_id,
};
module_i2c_driver(cyttsp5_i2c_driver);
generated by cgit (git 2.34.1) at 2025-12-25 16:58:40 +0000