Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/mxs',...

Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/mxs', 'spi/topic/orion', 'spi/topic/rspi' and 'spi/topic/s3c64xx' into spi-next

Documentation/devicetree/bindings/spi/spi-rspi.txt

@@ -5,11 +5,14 @@ Required properties:
 		     "renesas,rspi-<soctype>", "renesas,rspi" as fallback.
 		     For Renesas Serial Peripheral Interface on RZ/A1H:
 		     "renesas,rspi-<soctype>", "renesas,rspi-rz" as fallback.
-		     For Quad Serial Peripheral Interface on R-Car Gen2:
+		     For Quad Serial Peripheral Interface on R-Car Gen2 and
+		     RZ/G1 devices:
 		     "renesas,qspi-<soctype>", "renesas,qspi" as fallback.
 		     Examples with soctypes are:
 		        - "renesas,rspi-sh7757" (SH)
 			- "renesas,rspi-r7s72100" (RZ/A1H)
+			- "renesas,qspi-r8a7743" (RZ/G1M)
+			- "renesas,qspi-r8a7745" (RZ/G1E)
 			- "renesas,qspi-r8a7790" (R-Car H2)
 			- "renesas,qspi-r8a7791" (R-Car M2-W)
 			- "renesas,qspi-r8a7792" (R-Car V2H)

drivers/spi/spi-mxs.c

@@ -44,6 +44,7 @@
 #include <linux/completion.h>
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
 #include <linux/module.h>
 #include <linux/stmp_device.h>
 #include <linux/spi/spi.h>
@@ -442,6 +443,85 @@ static int mxs_spi_transfer_one(struct spi_master *master,
 	return status;
 }
 
+static int mxs_spi_runtime_suspend(struct device *dev)
+{
+	struct spi_master *master = dev_get_drvdata(dev);
+	struct mxs_spi *spi = spi_master_get_devdata(master);
+	struct mxs_ssp *ssp = &spi->ssp;
+	int ret;
+
+	clk_disable_unprepare(ssp->clk);
+
+	ret = pinctrl_pm_select_idle_state(dev);
+	if (ret) {
+		int ret2 = clk_prepare_enable(ssp->clk);
+
+		if (ret2)
+			dev_warn(dev, "Failed to reenable clock after failing pinctrl request (pinctrl: %d, clk: %d)\n",
+				 ret, ret2);
+	}
+
+	return ret;
+}
+
+static int mxs_spi_runtime_resume(struct device *dev)
+{
+	struct spi_master *master = dev_get_drvdata(dev);
+	struct mxs_spi *spi = spi_master_get_devdata(master);
+	struct mxs_ssp *ssp = &spi->ssp;
+	int ret;
+
+	ret = pinctrl_pm_select_default_state(dev);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(ssp->clk);
+	if (ret)
+		pinctrl_pm_select_idle_state(dev);
+
+	return ret;
+}
+
+static int __maybe_unused mxs_spi_suspend(struct device *dev)
+{
+	struct spi_master *master = dev_get_drvdata(dev);
+	int ret;
+
+	ret = spi_master_suspend(master);
+	if (ret)
+		return ret;
+
+	if (!pm_runtime_suspended(dev))
+		return mxs_spi_runtime_suspend(dev);
+	else
+		return 0;
+}
+
+static int __maybe_unused mxs_spi_resume(struct device *dev)
+{
+	struct spi_master *master = dev_get_drvdata(dev);
+	int ret;
+
+	if (!pm_runtime_suspended(dev))
+		ret = mxs_spi_runtime_resume(dev);
+	else
+		ret = 0;
+	if (ret)
+		return ret;
+
+	ret = spi_master_resume(master);
+	if (ret < 0 && !pm_runtime_suspended(dev))
+		mxs_spi_runtime_suspend(dev);
+
+	return ret;
+}
+
+static const struct dev_pm_ops mxs_spi_pm = {
+	SET_RUNTIME_PM_OPS(mxs_spi_runtime_suspend,
+			   mxs_spi_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(mxs_spi_suspend, mxs_spi_resume)
+};
+
 static const struct of_device_id mxs_spi_dt_ids[] = {
 	{ .compatible = "fsl,imx23-spi", .data = (void *) IMX23_SSP, },
 	{ .compatible = "fsl,imx28-spi", .data = (void *) IMX28_SSP, },
@@ -493,12 +573,15 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	if (!master)
 		return -ENOMEM;
 
+	platform_set_drvdata(pdev, master);
+
 	master->transfer_one_message = mxs_spi_transfer_one;
 	master->bits_per_word_mask = SPI_BPW_MASK(8);
 	master->mode_bits = SPI_CPOL | SPI_CPHA;
 	master->num_chipselect = 3;
 	master->dev.of_node = np;
 	master->flags = SPI_MASTER_HALF_DUPLEX;
+	master->auto_runtime_pm = true;
 
 	spi = spi_master_get_devdata(master);
 	ssp = &spi->ssp;
@@ -521,28 +604,41 @@ static int mxs_spi_probe(struct platform_device *pdev)
 		goto out_master_free;
 	}
 
-	ret = clk_prepare_enable(ssp->clk);
-	if (ret)
+	pm_runtime_enable(ssp->dev);
+	if (!pm_runtime_enabled(ssp->dev)) {
+		ret = mxs_spi_runtime_resume(ssp->dev);
+		if (ret < 0) {
+			dev_err(ssp->dev, "runtime resume failed\n");
 			goto out_dma_release;
+		}
+	}
+
+	ret = pm_runtime_get_sync(ssp->dev);
+	if (ret < 0) {
+		dev_err(ssp->dev, "runtime_get_sync failed\n");
+		goto out_pm_runtime_disable;
+	}
 
 	clk_set_rate(ssp->clk, clk_freq);
 
 	ret = stmp_reset_block(ssp->base);
 	if (ret)
-		goto out_disable_clk;
-
-	platform_set_drvdata(pdev, master);
+		goto out_pm_runtime_put;
 
 	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret) {
 		dev_err(&pdev->dev, "Cannot register SPI master, %d\n", ret);
-		goto out_disable_clk;
+		goto out_pm_runtime_put;
 	}
 
+	pm_runtime_put(ssp->dev);
+
 	return 0;
 
-out_disable_clk:
-	clk_disable_unprepare(ssp->clk);
+out_pm_runtime_put:
+	pm_runtime_put(ssp->dev);
+out_pm_runtime_disable:
+	pm_runtime_disable(ssp->dev);
 out_dma_release:
 	dma_release_channel(ssp->dmach);
 out_master_free:
@@ -560,7 +656,10 @@ static int mxs_spi_remove(struct platform_device *pdev)
 	spi = spi_master_get_devdata(master);
 	ssp = &spi->ssp;
 
-	clk_disable_unprepare(ssp->clk);
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		mxs_spi_runtime_suspend(&pdev->dev);
+
 	dma_release_channel(ssp->dmach);
 
 	return 0;
@@ -572,6 +671,7 @@ static struct platform_driver mxs_spi_driver = {
 	.driver	= {
 		.name	= DRIVER_NAME,
 		.of_match_table = mxs_spi_dt_ids,
+		.pm = &mxs_spi_pm,
 	},
 };
 

drivers/spi/spi-orion.c

@@ -671,7 +671,6 @@ static int orion_spi_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev,
 				"%pOF has no valid 'reg' property (%d)\n",
 				np, status);
-			status = 0;
 			continue;
 		}
 

drivers/spi/spi-rspi.c

@@ -1221,7 +1221,6 @@ static int rspi_probe(struct platform_device *pdev)
 	struct spi_master *master;
 	struct rspi_data *rspi;
 	int ret;
-	const struct of_device_id *of_id;
 	const struct rspi_plat_data *rspi_pd;
 	const struct spi_ops *ops;
 
@@ -1229,9 +1228,8 @@ static int rspi_probe(struct platform_device *pdev)
 	if (master == NULL)
 		return -ENOMEM;
 
-	of_id = of_match_device(rspi_of_match, &pdev->dev);
-	if (of_id) {
-		ops = of_id->data;
+	ops = of_device_get_match_data(&pdev->dev);
+	if (ops) {
 		ret = rspi_parse_dt(&pdev->dev, master);
 		if (ret)
 			goto error1;

drivers/spi/spi-s3c64xx.c

@@ -752,7 +752,6 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 {
 	struct s3c64xx_spi_csinfo *cs = spi->controller_data;
 	struct s3c64xx_spi_driver_data *sdd;
-	struct s3c64xx_spi_info *sci;
 	int err;
 
 	sdd = spi_master_get_devdata(spi->master);
@@ -788,8 +787,6 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 		spi_set_ctldata(spi, cs);
 	}
 
-	sci = sdd->cntrlr_info;
-
 	pm_runtime_get_sync(&sdd->pdev->dev);
 
 	/* Check if we can provide the requested rate */