msm: camera: flash: Add support for qup i2c flash

Add Support for qup i2c based flash. Update i2c
driver probe function and added regulator init at
power up and init for gpio pin control table. Since
positive return values are not errors for qup i2c rx
and tx data transfer, fix the return type for the APIs.
Added check for null pointer in get flash dt data for
device node. Correct the logging group in sensor util
for regulator power up function.

CRs-Fixed: 3047031
Change-Id: I70558fbb489b622da25278283015139b6d4fe2a6
Signed-off-by: Vishal Verma <[email protected]>

drivers/cam_sensor_module/cam_flash/cam_flash_dev.c

@@ -428,6 +428,7 @@ static int cam_flash_component_bind(struct device *dev,
 		return -ENOMEM;
 
 	fctrl->pdev = pdev;
+	fctrl->of_node = pdev->dev.of_node;
 	fctrl->soc_info.pdev = pdev;
 	fctrl->soc_info.dev = &pdev->dev;
 	fctrl->soc_info.dev_name = pdev->name;
@@ -585,13 +586,18 @@ static int32_t cam_flash_i2c_driver_probe(struct i2c_client *client,
 {
 	int32_t rc = 0, i = 0;
 	struct cam_flash_ctrl *fctrl;
+	struct cam_hw_soc_info *soc_info = NULL;
 
-	if (client == NULL || id == NULL) {
-		CAM_ERR(CAM_FLASH, "Invalid Args client: %pK id: %pK",
-			client, id);
+	if (client == NULL) {
+		CAM_ERR(CAM_FLASH, "Invalid Args client: %pK",
+			client);
 		return -EINVAL;
 	}
 
+	if (id == NULL) {
+		CAM_DBG(CAM_FLASH, "device id is Null");
+	}
+
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		CAM_ERR(CAM_FLASH, "%s :: i2c_check_functionality failed",
 			 client->name);
@@ -603,9 +609,9 @@ static int32_t cam_flash_i2c_driver_probe(struct i2c_client *client,
 	if (!fctrl)
 		return -ENOMEM;
 
-	i2c_set_clientdata(client, fctrl);
-
+	client->dev.driver_data = fctrl;
 	fctrl->io_master_info.client = client;
+	fctrl->of_node = client->dev.of_node;
 	fctrl->soc_info.dev = &client->dev;
 	fctrl->soc_info.dev_name = client->name;
 	fctrl->io_master_info.master_type = I2C_MASTER;
@@ -616,6 +622,49 @@ static int32_t cam_flash_i2c_driver_probe(struct i2c_client *client,
 		goto free_ctrl;
 	}
 
+	rc = cam_flash_init_default_params(fctrl);
+	if (rc) {
+		CAM_ERR(CAM_FLASH,
+				"failed: cam_flash_init_default_params rc %d",
+				rc);
+		goto free_ctrl;
+	}
+
+	soc_info = &fctrl->soc_info;
+
+	/* Initalize regulators to default parameters */
+	for (i = 0; i < soc_info->num_rgltr; i++) {
+		soc_info->rgltr[i] = devm_regulator_get(soc_info->dev,
+			soc_info->rgltr_name[i]);
+		if (IS_ERR_OR_NULL(soc_info->rgltr[i])) {
+			rc = PTR_ERR(soc_info->rgltr[i]);
+			rc  = rc ? rc : -EINVAL;
+			CAM_ERR(CAM_FLASH, "get failed for regulator %s %d",
+				soc_info->rgltr_name[i], rc);
+			goto free_ctrl;
+		}
+		CAM_DBG(CAM_FLASH, "get for regulator %s",
+			soc_info->rgltr_name[i]);
+	}
+
+	if (!soc_info->gpio_data) {
+		CAM_DBG(CAM_FLASH, "No GPIO found");
+	} else {
+		if (!soc_info->gpio_data->cam_gpio_common_tbl_size) {
+			CAM_DBG(CAM_FLASH, "No GPIO found");
+			rc = -EINVAL;
+			goto free_ctrl;
+		}
+
+		rc = cam_sensor_util_init_gpio_pin_tbl(soc_info,
+			&fctrl->power_info.gpio_num_info);
+		if ((rc < 0) || (!fctrl->power_info.gpio_num_info)) {
+			CAM_ERR(CAM_FLASH, "No/Error Flash GPIOs");
+			rc = -EINVAL;
+			goto free_ctrl;
+		}
+	}
+
 	rc = cam_flash_init_subdev(fctrl);
 	if (rc)
 		goto free_ctrl;
@@ -683,6 +732,7 @@ static struct i2c_driver cam_flash_i2c_driver = {
 	.remove = cam_flash_i2c_driver_remove,
 	.driver = {
 		.name = FLASH_DRIVER_I2C,
+		.of_match_table = cam_flash_dt_match,
 	},
 };
 
@@ -697,8 +747,9 @@ int32_t cam_flash_init_module(void)
 	}
 
 	rc = i2c_add_driver(&cam_flash_i2c_driver);
-	if (rc)
+	if (rc < 0)
 		CAM_ERR(CAM_FLASH, "i2c_add_driver failed rc: %d", rc);
+
 	return rc;
 }
 

drivers/cam_sensor_module/cam_flash/cam_flash_soc.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/of.h>
@@ -285,7 +285,14 @@ int cam_flash_get_dt_data(struct cam_flash_ctrl *fctrl,
 		rc = -ENOMEM;
 		goto release_soc_res;
 	}
-	of_node = fctrl->pdev->dev.of_node;
+
+	if (fctrl->of_node == NULL) {
+		CAM_ERR(CAM_FLASH, "device node is NULL");
+		rc = -EINVAL;
+		goto free_soc_private;
+	}
+
+	of_node = fctrl->of_node;
 
 	rc = cam_soc_util_get_dt_properties(soc_info);
 	if (rc) {

drivers/cam_sensor_module/cam_sensor_io/cam_sensor_qup_i2c.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #include "cam_sensor_cmn_header.h"
@@ -31,9 +31,14 @@ static int32_t cam_qup_i2c_rxdata(
 		},
 	};
 	rc = i2c_transfer(dev_client->adapter, msgs, 2);
-	if (rc < 0)
+	if (rc < 0) {
 		CAM_ERR(CAM_SENSOR, "failed 0x%x", saddr);
-	return rc;
+		return rc;
+	}
+	/* Returns negative errno */
+	/* else the number of messages executed. */
+	/* So positive values are not errors. */
+	return 0;
 }
 
 
@@ -52,9 +57,14 @@ static int32_t cam_qup_i2c_txdata(
 		 },
 	};
 	rc = i2c_transfer(dev_client->client->adapter, msg, 1);
-	if (rc < 0)
+	if (rc < 0) {
 		CAM_ERR(CAM_SENSOR, "failed 0x%x", saddr);
-	return rc;
+		return rc;
+	}
+	/* Returns negative errno, */
+	/* else the number of messages executed. */
+	/* So positive values are not errors. */
+	return 0;
 }
 
 int32_t cam_qup_i2c_read(struct i2c_client *client,