spi: pxa2xx: Move platform driver to a separate file

The spi-pxa2xx.c is bloated with a platform driver code while
pretending to provide a core functionality. Make it real core
library by splitting out the platform driver to a separate file.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://msgid.link/r/20240530151117.1130792-11-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 8 insertions, 207 deletions

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 74f242e652df..1fb30201459f 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -4,7 +4,6 @@
  * Copyright (C) 2013, 2021 Intel Corporation
  */
 
-#include <linux/acpi.h>
 #include <linux/atomic.h>
 #include <linux/bitops.h>
 #include <linux/bug.h>
@@ -14,15 +13,12 @@
 #include <linux/dmaengine.h>
 #include <linux/err.h>
 #include <linux/gpio/consumer.h>
-#include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/math64.h>
 #include <linux/minmax.h>
-#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
 #include <linux/slab.h>
@@ -32,11 +28,6 @@
 
 #include "spi-pxa2xx.h"
 
-MODULE_AUTHOR("Stephen Street");
-MODULE_DESCRIPTION("PXA2xx SSP SPI Controller");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:pxa2xx-spi");
-
 #define TIMOUT_DFLT		1000
 
 /*
@@ -1263,131 +1254,6 @@ static void cleanup(struct spi_device *spi)
 	kfree(chip);
 }
 
-static bool pxa2xx_spi_idma_filter(struct dma_chan *chan, void *param)
-{
-	return param == chan->device->dev;
-}
-
-static int
-pxa2xx_spi_init_ssp(struct platform_device *pdev, struct ssp_device *ssp, enum pxa_ssp_type type)
-{
-	struct device *dev = &pdev->dev;
-	struct resource *res;
-	int status;
-	u64 uid;
-
-	ssp->mmio_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
-	if (IS_ERR(ssp->mmio_base))
-		return PTR_ERR(ssp->mmio_base);
-
-	ssp->phys_base = res->start;
-
-	ssp->clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(ssp->clk))
-		return PTR_ERR(ssp->clk);
-
-	ssp->irq = platform_get_irq(pdev, 0);
-	if (ssp->irq < 0)
-		return ssp->irq;
-
-	ssp->type = type;
-	ssp->dev = dev;
-
-	status = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid);
-	if (status)
-		ssp->port_id = -1;
-	else
-		ssp->port_id = uid;
-
-	return 0;
-}
-
-static void pxa2xx_spi_ssp_release(void *ssp)
-{
-	pxa_ssp_free(ssp);
-}
-
-static struct ssp_device *pxa2xx_spi_ssp_request(struct platform_device *pdev)
-{
-	struct ssp_device *ssp;
-	int status;
-
-	ssp = pxa_ssp_request(pdev->id, pdev->name);
-	if (!ssp)
-		return ssp;
-
-	status = devm_add_action_or_reset(&pdev->dev, pxa2xx_spi_ssp_release, ssp);
-	if (status)
-		return ERR_PTR(status);
-
-	return ssp;
-}
-
-static struct pxa2xx_spi_controller *
-pxa2xx_spi_init_pdata(struct platform_device *pdev)
-{
-	struct pxa2xx_spi_controller *pdata;
-	struct device *dev = &pdev->dev;
-	struct device *parent = dev->parent;
-	const void *match = device_get_match_data(dev);
-	enum pxa_ssp_type type = SSP_UNDEFINED;
-	struct ssp_device *ssp;
-	bool is_lpss_priv;
-	u32 num_cs = 1;
-	int status;
-
-	ssp = pxa2xx_spi_ssp_request(pdev);
-	if (IS_ERR(ssp))
-		return ERR_CAST(ssp);
-	if (ssp) {
-		type = ssp->type;
-	} else if (match) {
-		type = (enum pxa_ssp_type)(uintptr_t)match;
-	} else {
-		u32 value;
-
-		status = device_property_read_u32(dev, "intel,spi-pxa2xx-type", &value);
-		if (status)
-			return ERR_PTR(status);
-
-		type = (enum pxa_ssp_type)value;
-	}
-
-	/* Validate the SSP type correctness */
-	if (!(type > SSP_UNDEFINED && type < SSP_MAX))
-		return ERR_PTR(-EINVAL);
-
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return ERR_PTR(-ENOMEM);
-
-	/* Platforms with iDMA 64-bit */
-	is_lpss_priv = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpss_priv");
-	if (is_lpss_priv) {
-		pdata->tx_param = parent;
-		pdata->rx_param = parent;
-		pdata->dma_filter = pxa2xx_spi_idma_filter;
-	}
-
-	/* Read number of chip select pins, if provided */
-	device_property_read_u32(dev, "num-cs", &num_cs);
-
-	pdata->num_chipselect = num_cs;
-	pdata->is_target = device_property_read_bool(dev, "spi-slave");
-	pdata->enable_dma = true;
-	pdata->dma_burst_size = 1;
-
-	/* If SSP has been already enumerated, use it */
-	if (ssp)
-		return pdata;
-
-	status = pxa2xx_spi_init_ssp(pdev, &pdata->ssp, type);
-	if (status)
-		return ERR_PTR(status);
-
-	return pdata;
-}
-
 static int pxa2xx_spi_fw_translate_cs(struct spi_controller *controller,
 				      unsigned int cs)
 {
@@ -1413,7 +1279,7 @@ static size_t pxa2xx_spi_max_dma_transfer_size(struct spi_device *spi)
 	return MAX_DMA_LEN;
 }
 
-static int pxa2xx_spi_probe(struct device *dev, struct ssp_device *ssp)
+int pxa2xx_spi_probe(struct device *dev, struct ssp_device *ssp)
 {
 	struct pxa2xx_spi_controller *platform_info;
 	struct spi_controller *controller;
@@ -1613,8 +1479,9 @@ out_error_dma_irq_alloc:
 
 	return status;
 }
+EXPORT_SYMBOL_NS_GPL(pxa2xx_spi_probe, SPI_PXA2xx);
 
-static void pxa2xx_spi_remove(struct device *dev)
+void pxa2xx_spi_remove(struct device *dev)
 {
 	struct driver_data *drv_data = dev_get_drvdata(dev);
 	struct ssp_device *ssp = drv_data->ssp;
@@ -1637,6 +1504,7 @@ static void pxa2xx_spi_remove(struct device *dev)
 	/* Release IRQ */
 	free_irq(ssp->irq, drv_data);
 }
+EXPORT_SYMBOL_NS_GPL(pxa2xx_spi_remove, SPI_PXA2xx);
 
 static int pxa2xx_spi_suspend(struct device *dev)
 {
@@ -1688,78 +1556,11 @@ static int pxa2xx_spi_runtime_resume(struct device *dev)
 	return clk_prepare_enable(drv_data->ssp->clk);
 }
 
-static const struct dev_pm_ops pxa2xx_spi_pm_ops = {
+EXPORT_NS_GPL_DEV_PM_OPS(pxa2xx_spi_pm_ops, SPI_PXA2xx) = {
 	SYSTEM_SLEEP_PM_OPS(pxa2xx_spi_suspend, pxa2xx_spi_resume)
 	RUNTIME_PM_OPS(pxa2xx_spi_runtime_suspend, pxa2xx_spi_runtime_resume, NULL)
 };
 
-static int pxa2xx_spi_platform_probe(struct platform_device *pdev)
-{
-	struct pxa2xx_spi_controller *platform_info;
-	struct device *dev = &pdev->dev;
-	struct ssp_device *ssp;
-
-	platform_info = dev_get_platdata(dev);
-	if (!platform_info) {
-		platform_info = pxa2xx_spi_init_pdata(pdev);
-		if (IS_ERR(platform_info))
-			return dev_err_probe(dev, PTR_ERR(platform_info), "missing platform data\n");
-
-		dev->platform_data = platform_info;
-	}
-
-	ssp = pxa2xx_spi_ssp_request(pdev);
-	if (IS_ERR(ssp))
-		return PTR_ERR(ssp);
-	if (!ssp)
-		ssp = &platform_info->ssp;
-
-	return pxa2xx_spi_probe(dev, ssp);
-}
-
-static void pxa2xx_spi_platform_remove(struct platform_device *pdev)
-{
-	pxa2xx_spi_remove(&pdev->dev);
-}
-
-static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
-	{ "80860F0E" },
-	{ "8086228E" },
-	{ "INT33C0" },
-	{ "INT33C1" },
-	{ "INT3430" },
-	{ "INT3431" },
-	{}
-};
-MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_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);
-
-static struct platform_driver driver = {
-	.driver = {
-		.name	= "pxa2xx-spi",
-		.pm	= pm_ptr(&pxa2xx_spi_pm_ops),
-		.acpi_match_table = pxa2xx_spi_acpi_match,
-		.of_match_table = pxa2xx_spi_of_match,
-	},
-	.probe = pxa2xx_spi_platform_probe,
-	.remove_new = pxa2xx_spi_platform_remove,
-};
-
-static int __init pxa2xx_spi_init(void)
-{
-	return platform_driver_register(&driver);
-}
-subsys_initcall(pxa2xx_spi_init);
-
-static void __exit pxa2xx_spi_exit(void)
-{
-	platform_driver_unregister(&driver);
-}
-module_exit(pxa2xx_spi_exit);
-
-MODULE_SOFTDEP("pre: dw_dmac");
+MODULE_AUTHOR("Stephen Street");
+MODULE_DESCRIPTION("PXA2xx SSP SPI Controller core driver");
+MODULE_LICENSE("GPL");