diff mbox series

[3/3] input/touchscreen: imagis: Add support for Imagis IST3038B

Message ID 20220504152406.8730-4-markuss.broks@gmail.com (mailing list archive)
State New
Headers show
Series Add support for Imagis IST3038B | expand

Commit Message

Markuss Broks May 4, 2022, 3:24 p.m. UTC
Imagis IST3038B is another variant of Imagis IST3038 IC, which has
a different register interface from IST3038C (possibly firmware defined).
This should also work for IST3044B (though untested), however other
variants using this interface/protocol(IST3026, IST3032, IST3026B,
IST3032B) have a different format for coordinates, and they'd need
additional effort to be supported by this driver.

Signed-off-by: Markuss Broks <markuss.broks@gmail.com>
---
 drivers/input/touchscreen/imagis.c | 58 ++++++++++++++++++++++++------
 1 file changed, 47 insertions(+), 11 deletions(-)

Comments

kernel test robot May 4, 2022, 8:30 p.m. UTC | #1
Hi Markuss,

I love your patch! Perhaps something to improve:

[auto build test WARNING on dtor-input/next]
[also build test WARNING on linux/master linus/master v5.18-rc5 next-20220504]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Markuss-Broks/Add-support-for-Imagis-IST3038B/20220504-232637
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
config: hexagon-randconfig-r022-20220502 (https://download.01.org/0day-ci/archive/20220505/202205050459.Cn4Mj5ny-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 363b3a645a1e30011cc8da624f13dac5fd915628)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/a22f360f66c82a3bc53d9861a62d2d2e5abe897c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Markuss-Broks/Add-support-for-Imagis-IST3038B/20220504-232637
        git checkout a22f360f66c82a3bc53d9861a62d2d2e5abe897c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/input/touchscreen/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/input/touchscreen/imagis.c:366:39: warning: unused variable 'imagis_3038b_data' [-Wunused-const-variable]
   static const struct imagis_properties imagis_3038b_data = {
                                         ^
>> drivers/input/touchscreen/imagis.c:374:39: warning: unused variable 'imagis_3038c_data' [-Wunused-const-variable]
   static const struct imagis_properties imagis_3038c_data = {
                                         ^
   2 warnings generated.


vim +/imagis_3038b_data +366 drivers/input/touchscreen/imagis.c

   365	
 > 366	static const struct imagis_properties imagis_3038b_data = {
   367		.interrupt_msg_cmd = IST3038B_REG_STATUS,
   368		.touch_coord_cmd = IST3038B_REG_STATUS,
   369		.whoami_cmd = IST3038B_REG_CHIPID,
   370		.whoami_val = IST3038B_WHOAMI,
   371		.protocol_b = true,
   372	};
   373	
 > 374	static const struct imagis_properties imagis_3038c_data = {
   375		.interrupt_msg_cmd = IST3038C_REG_INTR_MESSAGE,
   376		.touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
   377		.whoami_cmd = IST3038C_REG_CHIPID,
   378		.whoami_val = IST3038C_WHOAMI,
   379	};
   380
diff mbox series

Patch

diff --git a/drivers/input/touchscreen/imagis.c b/drivers/input/touchscreen/imagis.c
index b667914a44f1..57bb8f31ac1f 100644
--- a/drivers/input/touchscreen/imagis.c
+++ b/drivers/input/touchscreen/imagis.c
@@ -13,7 +13,7 @@ 
 
 #define IST3038C_HIB_ACCESS		(0x800B << 16)
 #define IST3038C_DIRECT_ACCESS		BIT(31)
-#define IST3038C_REG_CHIPID		0x40001000
+#define IST3038C_REG_CHIPID		(0x40001000 | IST3038C_DIRECT_ACCESS)
 #define IST3038C_REG_HIB_BASE		0x30000100
 #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)
@@ -31,8 +31,21 @@ 
 #define IST3038C_FINGER_COUNT_SHIFT	12
 #define IST3038C_FINGER_STATUS_MASK	GENMASK(9, 0)
 
+#define IST3038B_REG_STATUS		0x20
+#define IST3038B_REG_CHIPID		0x30
+#define IST3038B_WHOAMI			0x30380b
+
+struct imagis_properties {
+	unsigned int interrupt_msg_cmd;
+	unsigned int touch_coord_cmd;
+	unsigned int whoami_cmd;
+	unsigned int whoami_val;
+	bool protocol_b;
+};
+
 struct imagis_ts {
 	struct i2c_client *client;
+	const struct imagis_properties *tdata;
 	struct input_dev *input_dev;
 	struct touchscreen_properties prop;
 	struct regulator_bulk_data supplies[2];
@@ -84,8 +97,7 @@  static irqreturn_t imagis_interrupt(int irq, void *dev_id)
 	int i;
 	int error;
 
-	error = imagis_i2c_read_reg(ts, IST3038C_REG_INTR_MESSAGE,
-				    &intr_message);
+	error = imagis_i2c_read_reg(ts, ts->tdata->interrupt_msg_cmd, &intr_message);
 	if (error) {
 		dev_err(&ts->client->dev,
 			"failed to read the interrupt message: %d\n", error);
@@ -104,9 +116,13 @@  static irqreturn_t imagis_interrupt(int irq, void *dev_id)
 	finger_pressed = intr_message & IST3038C_FINGER_STATUS_MASK;
 
 	for (i = 0; i < finger_count; i++) {
-		error = imagis_i2c_read_reg(ts,
-					    IST3038C_REG_TOUCH_COORD + (i * 4),
-					    &finger_status);
+		if (ts->tdata->protocol_b)
+			error = imagis_i2c_read_reg(ts,
+						    ts->tdata->touch_coord_cmd, &finger_status);
+		else
+			error = imagis_i2c_read_reg(ts,
+						    ts->tdata->touch_coord_cmd + (i * 4),
+						    &finger_status);
 		if (error) {
 			dev_err(&ts->client->dev,
 				"failed to read coordinates for finger %d: %d\n",
@@ -261,6 +277,12 @@  static int imagis_probe(struct i2c_client *i2c)
 
 	ts->client = i2c;
 
+	ts->tdata = device_get_match_data(dev);
+	if (!ts->tdata) {
+		dev_err(dev, "missing chip data\n");
+		return -EINVAL;
+	}
+
 	error = imagis_init_regulators(ts);
 	if (error) {
 		dev_err(dev, "regulator init error: %d\n", error);
@@ -279,15 +301,13 @@  static int imagis_probe(struct i2c_client *i2c)
 		return error;
 	}
 
-	error = imagis_i2c_read_reg(ts,
-			IST3038C_REG_CHIPID | IST3038C_DIRECT_ACCESS,
-			&chip_id);
+	error = imagis_i2c_read_reg(ts, ts->tdata->whoami_cmd, &chip_id);
 	if (error) {
 		dev_err(dev, "chip ID read failure: %d\n", error);
 		return error;
 	}
 
-	if (chip_id != IST3038C_WHOAMI) {
+	if (chip_id != ts->tdata->whoami_val) {
 		dev_err(dev, "unknown chip ID: 0x%x\n", chip_id);
 		return -EINVAL;
 	}
@@ -343,9 +363,25 @@  static int __maybe_unused imagis_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(imagis_pm_ops, imagis_suspend, imagis_resume);
 
+static const struct imagis_properties imagis_3038b_data = {
+	.interrupt_msg_cmd = IST3038B_REG_STATUS,
+	.touch_coord_cmd = IST3038B_REG_STATUS,
+	.whoami_cmd = IST3038B_REG_CHIPID,
+	.whoami_val = IST3038B_WHOAMI,
+	.protocol_b = true,
+};
+
+static const struct imagis_properties imagis_3038c_data = {
+	.interrupt_msg_cmd = IST3038C_REG_INTR_MESSAGE,
+	.touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
+	.whoami_cmd = IST3038C_REG_CHIPID,
+	.whoami_val = IST3038C_WHOAMI,
+};
+
 #ifdef CONFIG_OF
 static const struct of_device_id imagis_of_match[] = {
-	{ .compatible = "imagis,ist3038c", },
+	{ .compatible = "imagis,ist3038b", .data = &imagis_3038b_data },
+	{ .compatible = "imagis,ist3038c", .data = &imagis_3038c_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, imagis_of_match);