spi: pxa2xx: Add devicetree support

The MMP2 platform, that uses device tree, has this controller. Let's add
devicetree alongside platform & PCI.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx.c

@@ -33,6 +33,7 @@
 #include <linux/clk.h>
 #include <linux/pm_runtime.h>
 #include <linux/acpi.h>
+#include <linux/of_device.h>
 
 #include "spi-pxa2xx.h"
 
@@ -1335,9 +1336,6 @@ static void cleanup(struct spi_device *spi)
 	kfree(chip);
 }
 
-#ifdef CONFIG_PCI
-#ifdef CONFIG_ACPI
-
 static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
 	{ "INT33C0", LPSS_LPT_SSP },
 	{ "INT33C1", LPSS_LPT_SSP },
@@ -1349,23 +1347,6 @@ static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
 };
 MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
 
-static int pxa2xx_spi_get_port_id(struct acpi_device *adev)
-{
-	unsigned int devid;
-	int port_id = -1;
-
-	if (adev && adev->pnp.unique_id &&
-	    !kstrtouint(adev->pnp.unique_id, 0, &devid))
-		port_id = devid;
-	return port_id;
-}
-#else /* !CONFIG_ACPI */
-static int pxa2xx_spi_get_port_id(struct acpi_device *adev)
-{
-	return -1;
-}
-#endif
-
 /*
  * PCI IDs of compound devices that integrate both host controller and private
  * integrated DMA engine. Please note these are not used in module
@@ -1412,6 +1393,37 @@ static const struct pci_device_id pxa2xx_spi_pci_compound_match[] = {
 	{ },
 };
 
+static const struct of_device_id pxa2xx_spi_of_match[] = {
+	{ .compatible = "marvell,mmp2-ssp", .data = (void *)MMP2_SSP },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pxa2xx_spi_of_match);
+
+#ifdef CONFIG_ACPI
+
+static int pxa2xx_spi_get_port_id(struct acpi_device *adev)
+{
+	unsigned int devid;
+	int port_id = -1;
+
+	if (adev && adev->pnp.unique_id &&
+	    !kstrtouint(adev->pnp.unique_id, 0, &devid))
+		port_id = devid;
+	return port_id;
+}
+
+#else /* !CONFIG_ACPI */
+
+static int pxa2xx_spi_get_port_id(struct acpi_device *adev)
+{
+	return -1;
+}
+
+#endif /* CONFIG_ACPI */
+
+
+#ifdef CONFIG_PCI
+
 static bool pxa2xx_spi_idma_filter(struct dma_chan *chan, void *param)
 {
 	struct device *dev = param;
@@ -1422,6 +1434,8 @@ static bool pxa2xx_spi_idma_filter(struct dma_chan *chan, void *param)
 	return true;
 }
 
+#endif /* CONFIG_PCI */
+
 static struct pxa2xx_spi_master *
 pxa2xx_spi_init_pdata(struct platform_device *pdev)
 {
@@ -1431,11 +1445,15 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 	struct resource *res;
 	const struct acpi_device_id *adev_id = NULL;
 	const struct pci_device_id *pcidev_id = NULL;
+	const struct of_device_id *of_id = NULL;
 	enum pxa_ssp_type type;
 
 	adev = ACPI_COMPANION(&pdev->dev);
 
-	if (dev_is_pci(pdev->dev.parent))
+	if (pdev->dev.of_node)
+		of_id = of_match_device(pdev->dev.driver->of_match_table,
+					&pdev->dev);
+	else if (dev_is_pci(pdev->dev.parent))
 		pcidev_id = pci_match_id(pxa2xx_spi_pci_compound_match,
 					 to_pci_dev(pdev->dev.parent));
 	else if (adev)
@@ -1448,6 +1466,8 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 		type = (enum pxa_ssp_type)adev_id->driver_data;
 	else if (pcidev_id)
 		type = (enum pxa_ssp_type)pcidev_id->driver_data;
+	else if (of_id)
+		type = (enum pxa_ssp_type)of_id->data;
 	else
 		return NULL;
 
@@ -1466,11 +1486,13 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 	if (IS_ERR(ssp->mmio_base))
 		return NULL;
 
+#ifdef CONFIG_PCI
 	if (pcidev_id) {
 		pdata->tx_param = pdev->dev.parent;
 		pdata->rx_param = pdev->dev.parent;
 		pdata->dma_filter = pxa2xx_spi_idma_filter;
 	}
+#endif
 
 	ssp->clk = devm_clk_get(&pdev->dev, NULL);
 	ssp->irq = platform_get_irq(pdev, 0);
@@ -1484,14 +1506,6 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 	return pdata;
 }
 
-#else /* !CONFIG_PCI */
-static inline struct pxa2xx_spi_master *
-pxa2xx_spi_init_pdata(struct platform_device *pdev)
-{
-	return NULL;
-}
-#endif
-
 static int pxa2xx_spi_fw_translate_cs(struct spi_controller *master,
 				      unsigned int cs)
 {
@@ -1836,6 +1850,7 @@ static struct platform_driver driver = {
 		.name	= "pxa2xx-spi",
 		.pm	= &pxa2xx_spi_pm_ops,
 		.acpi_match_table = ACPI_PTR(pxa2xx_spi_acpi_match),
+		.of_match_table = of_match_ptr(pxa2xx_spi_of_match),
 	},
 	.probe = pxa2xx_spi_probe,
 	.remove = pxa2xx_spi_remove,

include/linux/pxa2xx_ssp.h

@@ -196,6 +196,7 @@ enum pxa_ssp_type {
 	PXA27x_SSP,
 	PXA3xx_SSP,
 	PXA168_SSP,
+	MMP2_SSP,
 	PXA910_SSP,
 	CE4100_SSP,
 	QUARK_X1000_SSP,