Imagis IST3038 is another variant of Imagis IST3038 IC, which has
a different register interface from IST3038C (possibly firmware defined).
Unlike IST3038C/IST3032C, IST3038 has different registers for commands,
which means IST3038 doesn't use protocol B.
Similar to IST3032C and maybe the other variants, IST3038 has touch keys
support, which provides KEY_APPSELECT and KEY_BACK.
Add support for IST3038 with touch keys.
Signed-off-by: Raymond Hackley <raymondhackley@xxxxxxxxxxxxxx>
---
drivers/input/touchscreen/imagis.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/drivers/input/touchscreen/imagis.c b/drivers/input/touchscreen/imagis.c
index 886bcfc8497a..aeabf8d057de 100644
--- a/drivers/input/touchscreen/imagis.c
+++ b/drivers/input/touchscreen/imagis.c
@@ -12,9 +12,17 @@
#include <linux/property.h>
#include <linux/regulator/consumer.h>
+#define IST30XX_REG_STATUS 0x20
+#define IST30XX_REG_CHIPID (0x40000000 | IST3038C_DIRECT_ACCESS)
+
+#define IST30XX_WHOAMI 0x30003000
+#define IST30XXA_WHOAMI 0x300a300a
+#define IST30XXB_WHOAMI 0x300b300b
+#define IST3038_WHOAMI 0x30383038
+
#define IST3032C_WHOAMI 0x32c
+#define IST3038C_WHOAMI 0x38c
-#define IST3038B_REG_STATUS 0x20
#define IST3038B_REG_CHIPID 0x30
#define IST3038B_WHOAMI 0x30380b
@@ -25,7 +33,6 @@
#define IST3038C_REG_TOUCH_STATUS (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS)
#define IST3038C_REG_TOUCH_COORD (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x8)
#define IST3038C_REG_INTR_MESSAGE (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x4)
-#define IST3038C_WHOAMI 0x38c
#define IST3038C_CHIP_ON_DELAY_MS 60
#define IST3038C_I2C_RETRY_COUNT 3
#define IST3038C_MAX_FINGER_NUM 10
@@ -397,9 +404,17 @@ static const struct imagis_properties imagis_3032c_data = {
.protocol_b = true,
};
+static const struct imagis_properties imagis_3038_data = {
+ .interrupt_msg_cmd = IST30XX_REG_STATUS,
+ .touch_coord_cmd = IST30XX_REG_STATUS,
+ .whoami_cmd = IST30XX_REG_CHIPID,
+ .whoami_val = IST3038_WHOAMI,
+ .touch_keys_supported = true,
+};
+
static const struct imagis_properties imagis_3038b_data = {
- .interrupt_msg_cmd = IST3038B_REG_STATUS,
- .touch_coord_cmd = IST3038B_REG_STATUS,
+ .interrupt_msg_cmd = IST30XX_REG_STATUS,
+ .touch_coord_cmd = IST30XX_REG_STATUS,
.whoami_cmd = IST3038B_REG_CHIPID,
.whoami_val = IST3038B_WHOAMI,
};
@@ -415,6 +430,7 @@ static const struct imagis_properties imagis_3038c_data = {
#ifdef CONFIG_OF
static const struct of_device_id imagis_of_match[] = {
{ .compatible = "imagis,ist3032c", .data = &imagis_3032c_data },
+ { .compatible = "imagis,ist3038", .data = &imagis_3038_data },
{ .compatible = "imagis,ist3038b", .data = &imagis_3038b_data },
{ .compatible = "imagis,ist3038c", .data = &imagis_3038c_data },
{ },
--
2.39.2
