linux: I2C has this time a power state fix in the core for ACPI devic…

…es, a

Commit: c2bf05db6c78f53ca5cd4b48f3b9b71f78d215f1

linux/drivers/i2c/busses/i2c-cadence.c

@@ -852,7 +852,8 @@ static int cdns_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
 					 CDNS_I2C_POLL_US, CDNS_I2C_TIMEOUT_US);
 	if (ret) {
 		ret = -EAGAIN;
-		i2c_recover_bus(adap);
+		if (id->adap.bus_recovery_info)
+			i2c_recover_bus(adap);
 		goto out;
 	}
 
@@ -1263,8 +1264,13 @@ static int cdns_i2c_probe(struct platform_device *pdev)
 
 	id->rinfo.pinctrl = devm_pinctrl_get(&pdev->dev);
 	if (IS_ERR(id->rinfo.pinctrl)) {
+		int err = PTR_ERR(id->rinfo.pinctrl);
+
 		dev_info(&pdev->dev, "can't get pinctrl, bus recovery not supported\n");
-		return PTR_ERR(id->rinfo.pinctrl);
+		if (err != -ENODEV)
+			return err;
+	} else {
+		id->adap.bus_recovery_info = &id->rinfo;
 	}
 
 	id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem);
@@ -1283,7 +1289,6 @@ static int cdns_i2c_probe(struct platform_device *pdev)
 	id->adap.retries = 3;		/* Default retry value. */
 	id->adap.algo_data = id;
 	id->adap.dev.parent = &pdev->dev;
-	id->adap.bus_recovery_info = &id->rinfo;
 	init_completion(&id->xfer_done);
 	snprintf(id->adap.name, sizeof(id->adap.name),
 		 "Cadence I2C at %08lx", (unsigned long)r_mem->start);

linux/drivers/i2c/busses/i2c-imx.c

@@ -1132,7 +1132,8 @@ static int i2c_imx_read(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs,
 	int i, result;
 	unsigned int temp;
 	int block_data = msgs->flags & I2C_M_RECV_LEN;
-	int use_dma = i2c_imx->dma && msgs->len >= DMA_THRESHOLD && !block_data;
+	int use_dma = i2c_imx->dma && msgs->flags & I2C_M_DMA_SAFE &&
+		msgs->len >= DMA_THRESHOLD && !block_data;
 
 	dev_dbg(&i2c_imx->adapter.dev,
 		"<%s> write slave address: addr=0x%x\n",
@@ -1298,7 +1299,8 @@ static int i2c_imx_xfer_common(struct i2c_adapter *adapter,
 			result = i2c_imx_read(i2c_imx, &msgs[i], is_lastmsg, atomic);
 		} else {
 			if (!atomic &&
-			    i2c_imx->dma && msgs[i].len >= DMA_THRESHOLD)
+			    i2c_imx->dma && msgs[i].len >= DMA_THRESHOLD &&
+				msgs[i].flags & I2C_M_DMA_SAFE)
 				result = i2c_imx_dma_write(i2c_imx, &msgs[i]);
 			else
 				result = i2c_imx_write(i2c_imx, &msgs[i], atomic);

linux/drivers/i2c/busses/i2c-npcm7xx.c

@@ -2393,8 +2393,17 @@ static struct platform_driver npcm_i2c_bus_driver = {
 
 static int __init npcm_i2c_init(void)
 {
+	int ret;
+
 	npcm_i2c_debugfs_dir = debugfs_create_dir("npcm_i2c", NULL);
-	return platform_driver_register(&npcm_i2c_bus_driver);
+
+	ret = platform_driver_register(&npcm_i2c_bus_driver);
+	if (ret) {
+		debugfs_remove_recursive(npcm_i2c_debugfs_dir);
+		return ret;
+	}
+
+	return 0;
 }
 module_init(npcm_i2c_init);
 

linux/drivers/i2c/busses/i2c-qcom-geni.c

@@ -626,7 +626,6 @@ static int geni_i2c_gpi_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], i
 			dev_err(gi2c->se.dev, "I2C timeout gpi flags:%d addr:0x%x\n",
 				gi2c->cur->flags, gi2c->cur->addr);
 			gi2c->err = -ETIMEDOUT;
-			goto err;
 		}
 
 		if (gi2c->err) {

linux/drivers/i2c/i2c-core-base.c

@@ -467,6 +467,7 @@ static int i2c_device_probe(struct device *dev)
 {
 	struct i2c_client	*client = i2c_verify_client(dev);
 	struct i2c_driver	*driver;
+	bool do_power_on;
 	int status;
 
 	if (!client)
@@ -545,8 +546,8 @@ static int i2c_device_probe(struct device *dev)
 	if (status < 0)
 		goto err_clear_wakeup_irq;
 
-	status = dev_pm_domain_attach(&client->dev,
-				      !i2c_acpi_waive_d0_probe(dev));
+	do_power_on = !i2c_acpi_waive_d0_probe(dev);
+	status = dev_pm_domain_attach(&client->dev, do_power_on);
 	if (status)
 		goto err_clear_wakeup_irq;
 
@@ -585,7 +586,7 @@ static int i2c_device_probe(struct device *dev)
 err_release_driver_resources:
 	devres_release_group(&client->dev, client->devres_group_id);
 err_detach_pm_domain:
-	dev_pm_domain_detach(&client->dev, !i2c_acpi_waive_d0_probe(dev));
+	dev_pm_domain_detach(&client->dev, do_power_on);
 err_clear_wakeup_irq:
 	dev_pm_clear_wake_irq(&client->dev);
 	device_init_wakeup(&client->dev, false);
@@ -610,7 +611,7 @@ static void i2c_device_remove(struct device *dev)
 
 	devres_release_group(&client->dev, client->devres_group_id);
 
-	dev_pm_domain_detach(&client->dev, !i2c_acpi_waive_d0_probe(dev));
+	dev_pm_domain_detach(&client->dev, true);
 
 	dev_pm_clear_wake_irq(&client->dev);
 	device_init_wakeup(&client->dev, false);