Orange Pi5 kernel

 // SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2015 Freescale Semiconductor, Inc.
 *
 * Freescale DCU drm device driver
 */
 
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/console.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
 
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_irq.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
 
#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"
#include "fsl_tcon.h"
 
static int legacyfb_depth = 24;
module_param(legacyfb_depth, int, 0444);
 
static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
{
<------>if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
<------><------>return true;
 
<------>return false;
}
 
static const struct regmap_config fsl_dcu_regmap_config = {
<------>.reg_bits = 32,
<------>.reg_stride = 4,
<------>.val_bits = 32,
 
<------>.volatile_reg = fsl_dcu_drm_is_volatile_reg,
};
 
static void fsl_dcu_irq_uninstall(struct drm_device *dev)
{
<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
 
<------>regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
<------>regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
}
 
static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
{
<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
<------>int ret;
 
<------>ret = fsl_dcu_drm_modeset_init(fsl_dev);
<------>if (ret < 0) {
<------><------>dev_err(dev->dev, "failed to initialize mode setting\n");
<------><------>return ret;
<------>}
 
<------>ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
<------>if (ret < 0) {
<------><------>dev_err(dev->dev, "failed to initialize vblank\n");
<------><------>goto done;
<------>}
 
<------>ret = drm_irq_install(dev, fsl_dev->irq);
<------>if (ret < 0) {
<------><------>dev_err(dev->dev, "failed to install IRQ handler\n");
<------><------>goto done;
<------>}
 
<------>if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
<------>    legacyfb_depth != 32) {
<------><------>dev_warn(dev->dev,
<------><------><------>"Invalid legacyfb_depth.  Defaulting to 24bpp\n");
<------><------>legacyfb_depth = 24;
<------>}
 
<------>return 0;
done:
<------>drm_kms_helper_poll_fini(dev);
 
<------>drm_mode_config_cleanup(dev);
<------>drm_irq_uninstall(dev);
<------>dev->dev_private = NULL;
 
<------>return ret;
}
 
static void fsl_dcu_unload(struct drm_device *dev)
{
<------>drm_atomic_helper_shutdown(dev);
<------>drm_kms_helper_poll_fini(dev);
 
<------>drm_mode_config_cleanup(dev);
<------>drm_irq_uninstall(dev);
 
<------>dev->dev_private = NULL;
}
 
static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
{
<------>struct drm_device *dev = arg;
<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
<------>unsigned int int_status;
<------>int ret;
 
<------>ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
<------>if (ret) {
<------><------>dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
<------><------>return IRQ_NONE;
<------>}
 
<------>if (int_status & DCU_INT_STATUS_VBLANK)
<------><------>drm_handle_vblank(dev, 0);
 
<------>regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
 
<------>return IRQ_HANDLED;
}
 
DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
 
static struct drm_driver fsl_dcu_drm_driver = {
<------>.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
<------>.load			= fsl_dcu_load,
<------>.unload			= fsl_dcu_unload,
<------>.irq_handler		= fsl_dcu_drm_irq,
<------>.irq_preinstall		= fsl_dcu_irq_uninstall,
<------>.irq_uninstall		= fsl_dcu_irq_uninstall,
<------>DRM_GEM_CMA_DRIVER_OPS,
<------>.fops			= &fsl_dcu_drm_fops,
<------>.name			= "fsl-dcu-drm",
<------>.desc			= "Freescale DCU DRM",
<------>.date			= "20160425",
<------>.major			= 1,
<------>.minor			= 1,
};
 
#ifdef CONFIG_PM_SLEEP
static int fsl_dcu_drm_pm_suspend(struct device *dev)
{
<------>struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
<------>int ret;
 
<------>if (!fsl_dev)
<------><------>return 0;
 
<------>disable_irq(fsl_dev->irq);
 
<------>ret = drm_mode_config_helper_suspend(fsl_dev->drm);
<------>if (ret) {
<------><------>enable_irq(fsl_dev->irq);
<------><------>return ret;
<------>}
 
<------>clk_disable_unprepare(fsl_dev->clk);
 
<------>return 0;
}
 
static int fsl_dcu_drm_pm_resume(struct device *dev)
{
<------>struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
<------>int ret;
 
<------>if (!fsl_dev)
<------><------>return 0;
 
<------>ret = clk_prepare_enable(fsl_dev->clk);
<------>if (ret < 0) {
<------><------>dev_err(dev, "failed to enable dcu clk\n");
<------><------>return ret;
<------>}
 
<------>if (fsl_dev->tcon)
<------><------>fsl_tcon_bypass_enable(fsl_dev->tcon);
<------>fsl_dcu_drm_init_planes(fsl_dev->drm);
<------>enable_irq(fsl_dev->irq);
 
<------>drm_mode_config_helper_resume(fsl_dev->drm);
 
<------>return 0;
}
#endif
 
static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
<------>SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
};
 
static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
<------>.name = "ls1021a",
<------>.total_layer = 16,
<------>.max_layer = 4,
<------>.layer_regs = LS1021A_LAYER_REG_NUM,
};
 
static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
<------>.name = "vf610",
<------>.total_layer = 64,
<------>.max_layer = 6,
<------>.layer_regs = VF610_LAYER_REG_NUM,
};
 
static const struct of_device_id fsl_dcu_of_match[] = {
<------>{
<------><------>.compatible = "fsl,ls1021a-dcu",
<------><------>.data = &fsl_dcu_ls1021a_data,
<------>}, {
<------><------>.compatible = "fsl,vf610-dcu",
<------><------>.data = &fsl_dcu_vf610_data,
<------>}, {
<------>},
};
MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
 
static int fsl_dcu_drm_probe(struct platform_device *pdev)
{
<------>struct fsl_dcu_drm_device *fsl_dev;
<------>struct drm_device *drm;
<------>struct device *dev = &pdev->dev;
<------>struct resource *res;
<------>void __iomem *base;
<------>struct drm_driver *driver = &fsl_dcu_drm_driver;
<------>struct clk *pix_clk_in;
<------>char pix_clk_name[32];
<------>const char *pix_clk_in_name;
<------>const struct of_device_id *id;
<------>int ret;
<------>u8 div_ratio_shift = 0;
 
<------>fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
<------>if (!fsl_dev)
<------><------>return -ENOMEM;
 
<------>id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
<------>if (!id)
<------><------>return -ENODEV;
<------>fsl_dev->soc = id->data;
 
<------>res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
<------>base = devm_ioremap_resource(dev, res);
<------>if (IS_ERR(base)) {
<------><------>ret = PTR_ERR(base);
<------><------>return ret;
<------>}
 
<------>fsl_dev->irq = platform_get_irq(pdev, 0);
<------>if (fsl_dev->irq < 0) {
<------><------>dev_err(dev, "failed to get irq\n");
<------><------>return fsl_dev->irq;
<------>}
 
<------>fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
<------><------><------>&fsl_dcu_regmap_config);
<------>if (IS_ERR(fsl_dev->regmap)) {
<------><------>dev_err(dev, "regmap init failed\n");
<------><------>return PTR_ERR(fsl_dev->regmap);
<------>}
 
<------>fsl_dev->clk = devm_clk_get(dev, "dcu");
<------>if (IS_ERR(fsl_dev->clk)) {
<------><------>dev_err(dev, "failed to get dcu clock\n");
<------><------>return PTR_ERR(fsl_dev->clk);
<------>}
<------>ret = clk_prepare_enable(fsl_dev->clk);
<------>if (ret < 0) {
<------><------>dev_err(dev, "failed to enable dcu clk\n");
<------><------>return ret;
<------>}
 
<------>pix_clk_in = devm_clk_get(dev, "pix");
<------>if (IS_ERR(pix_clk_in)) {
<------><------>/* legancy binding, use dcu clock as pixel clock input */
<------><------>pix_clk_in = fsl_dev->clk;
<------>}
 
<------>if (of_property_read_bool(dev->of_node, "big-endian"))
<------><------>div_ratio_shift = 24;
 
<------>pix_clk_in_name = __clk_get_name(pix_clk_in);
<------>snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
<------>fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
<------><------><------>pix_clk_in_name, 0, base + DCU_DIV_RATIO,
<------><------><------>div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
<------>if (IS_ERR(fsl_dev->pix_clk)) {
<------><------>dev_err(dev, "failed to register pix clk\n");
<------><------>ret = PTR_ERR(fsl_dev->pix_clk);
<------><------>goto disable_clk;
<------>}
 
<------>fsl_dev->tcon = fsl_tcon_init(dev);
 
<------>drm = drm_dev_alloc(driver, dev);
<------>if (IS_ERR(drm)) {
<------><------>ret = PTR_ERR(drm);
<------><------>goto unregister_pix_clk;
<------>}
 
<------>fsl_dev->dev = dev;
<------>fsl_dev->drm = drm;
<------>fsl_dev->np = dev->of_node;
<------>drm->dev_private = fsl_dev;
<------>dev_set_drvdata(dev, fsl_dev);
 
<------>ret = drm_dev_register(drm, 0);
<------>if (ret < 0)
<------><------>goto put;
 
<------>drm_fbdev_generic_setup(drm, legacyfb_depth);
 
<------>return 0;
 
put:
<------>drm_dev_put(drm);
unregister_pix_clk:
<------>clk_unregister(fsl_dev->pix_clk);
disable_clk:
<------>clk_disable_unprepare(fsl_dev->clk);
<------>return ret;
}
 
static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
<------>struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
 
<------>drm_dev_unregister(fsl_dev->drm);
<------>drm_dev_put(fsl_dev->drm);
<------>clk_disable_unprepare(fsl_dev->clk);
<------>clk_unregister(fsl_dev->pix_clk);
 
<------>return 0;
}
 
static struct platform_driver fsl_dcu_drm_platform_driver = {
<------>.probe		= fsl_dcu_drm_probe,
<------>.remove		= fsl_dcu_drm_remove,
<------>.driver		= {
<------><------>.name	= "fsl-dcu",
<------><------>.pm	= &fsl_dcu_drm_pm_ops,
<------><------>.of_match_table = fsl_dcu_of_match,
<------>},
};
 
module_platform_driver(fsl_dcu_drm_platform_driver);
 
MODULE_DESCRIPTION("Freescale DCU DRM Driver");
MODULE_LICENSE("GPL");

	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright 2015 Freescale Semiconductor, Inc.
	*
	* Freescale DCU drm device driver
	*/

	#include <linux/clk.h>
	#include <linux/clk-provider.h>
	#include <linux/console.h>
	#include <linux/io.h>
	#include <linux/mfd/syscon.h>
	#include <linux/mm.h>
	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <linux/platform_device.h>
	#include <linux/pm.h>
	#include <linux/pm_runtime.h>
	#include <linux/regmap.h>

	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_fb_cma_helper.h>
	#include <drm/drm_fb_helper.h>
	#include <drm/drm_gem_cma_helper.h>
	#include <drm/drm_irq.h>
	#include <drm/drm_modeset_helper.h>
	#include <drm/drm_probe_helper.h>
	#include <drm/drm_vblank.h>

	#include "fsl_dcu_drm_crtc.h"
	#include "fsl_dcu_drm_drv.h"
	#include "fsl_tcon.h"

	static int legacyfb_depth = 24;
	module_param(legacyfb_depth, int, 0444);

	static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
	{
	<------>if (reg == DCU_INT_STATUS \|\| reg == DCU_UPDATE_MODE)
	<------><------>return true;

	<------>return false;
	}

	static const struct regmap_config fsl_dcu_regmap_config = {
	<------>.reg_bits = 32,
	<------>.reg_stride = 4,
	<------>.val_bits = 32,

	<------>.volatile_reg = fsl_dcu_drm_is_volatile_reg,
	};

	static void fsl_dcu_irq_uninstall(struct drm_device *dev)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;

	<------>regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
	<------>regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
	}

	static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	<------>int ret;

	<------>ret = fsl_dcu_drm_modeset_init(fsl_dev);
	<------>if (ret < 0) {
	<------><------>dev_err(dev->dev, "failed to initialize mode setting\n");
	<------><------>return ret;
	<------>}

	<------>ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
	<------>if (ret < 0) {
	<------><------>dev_err(dev->dev, "failed to initialize vblank\n");
	<------><------>goto done;
	<------>}

	<------>ret = drm_irq_install(dev, fsl_dev->irq);
	<------>if (ret < 0) {
	<------><------>dev_err(dev->dev, "failed to install IRQ handler\n");
	<------><------>goto done;
	<------>}

	<------>if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
	<------> legacyfb_depth != 32) {
	<------><------>dev_warn(dev->dev,
	<------><------><------>"Invalid legacyfb_depth. Defaulting to 24bpp\n");
	<------><------>legacyfb_depth = 24;
	<------>}

	<------>return 0;
	done:
	<------>drm_kms_helper_poll_fini(dev);

	<------>drm_mode_config_cleanup(dev);
	<------>drm_irq_uninstall(dev);
	<------>dev->dev_private = NULL;

	<------>return ret;
	}

	static void fsl_dcu_unload(struct drm_device *dev)
	{
	<------>drm_atomic_helper_shutdown(dev);
	<------>drm_kms_helper_poll_fini(dev);

	<------>drm_mode_config_cleanup(dev);
	<------>drm_irq_uninstall(dev);

	<------>dev->dev_private = NULL;
	}

	static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
	{
	<------>struct drm_device *dev = arg;
	<------>struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	<------>unsigned int int_status;
	<------>int ret;

	<------>ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
	<------>if (ret) {
	<------><------>dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
	<------><------>return IRQ_NONE;
	<------>}

	<------>if (int_status & DCU_INT_STATUS_VBLANK)
	<------><------>drm_handle_vblank(dev, 0);

	<------>regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);

	<------>return IRQ_HANDLED;
	}

	DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);

	static struct drm_driver fsl_dcu_drm_driver = {
	<------>.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
	<------>.load = fsl_dcu_load,
	<------>.unload = fsl_dcu_unload,
	<------>.irq_handler = fsl_dcu_drm_irq,
	<------>.irq_preinstall = fsl_dcu_irq_uninstall,
	<------>.irq_uninstall = fsl_dcu_irq_uninstall,
	<------>DRM_GEM_CMA_DRIVER_OPS,
	<------>.fops = &fsl_dcu_drm_fops,
	<------>.name = "fsl-dcu-drm",
	<------>.desc = "Freescale DCU DRM",
	<------>.date = "20160425",
	<------>.major = 1,
	<------>.minor = 1,
	};

	#ifdef CONFIG_PM_SLEEP
	static int fsl_dcu_drm_pm_suspend(struct device *dev)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	<------>int ret;

	<------>if (!fsl_dev)
	<------><------>return 0;

	<------>disable_irq(fsl_dev->irq);

	<------>ret = drm_mode_config_helper_suspend(fsl_dev->drm);
	<------>if (ret) {
	<------><------>enable_irq(fsl_dev->irq);
	<------><------>return ret;
	<------>}

	<------>clk_disable_unprepare(fsl_dev->clk);

	<------>return 0;
	}

	static int fsl_dcu_drm_pm_resume(struct device *dev)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	<------>int ret;

	<------>if (!fsl_dev)
	<------><------>return 0;

	<------>ret = clk_prepare_enable(fsl_dev->clk);
	<------>if (ret < 0) {
	<------><------>dev_err(dev, "failed to enable dcu clk\n");
	<------><------>return ret;
	<------>}

	<------>if (fsl_dev->tcon)
	<------><------>fsl_tcon_bypass_enable(fsl_dev->tcon);
	<------>fsl_dcu_drm_init_planes(fsl_dev->drm);
	<------>enable_irq(fsl_dev->irq);

	<------>drm_mode_config_helper_resume(fsl_dev->drm);

	<------>return 0;
	}
	#endif

	static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
	<------>SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
	};

	static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
	<------>.name = "ls1021a",
	<------>.total_layer = 16,
	<------>.max_layer = 4,
	<------>.layer_regs = LS1021A_LAYER_REG_NUM,
	};

	static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
	<------>.name = "vf610",
	<------>.total_layer = 64,
	<------>.max_layer = 6,
	<------>.layer_regs = VF610_LAYER_REG_NUM,
	};

	static const struct of_device_id fsl_dcu_of_match[] = {
	<------>{
	<------><------>.compatible = "fsl,ls1021a-dcu",
	<------><------>.data = &fsl_dcu_ls1021a_data,
	<------>}, {
	<------><------>.compatible = "fsl,vf610-dcu",
	<------><------>.data = &fsl_dcu_vf610_data,
	<------>}, {
	<------>},
	};
	MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);

	static int fsl_dcu_drm_probe(struct platform_device *pdev)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev;
	<------>struct drm_device *drm;
	<------>struct device *dev = &pdev->dev;
	<------>struct resource *res;
	<------>void __iomem *base;
	<------>struct drm_driver *driver = &fsl_dcu_drm_driver;
	<------>struct clk *pix_clk_in;
	<------>char pix_clk_name[32];
	<------>const char *pix_clk_in_name;
	<------>const struct of_device_id *id;
	<------>int ret;
	<------>u8 div_ratio_shift = 0;

	<------>fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
	<------>if (!fsl_dev)
	<------><------>return -ENOMEM;

	<------>id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
	<------>if (!id)
	<------><------>return -ENODEV;
	<------>fsl_dev->soc = id->data;

	<------>res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	<------>base = devm_ioremap_resource(dev, res);
	<------>if (IS_ERR(base)) {
	<------><------>ret = PTR_ERR(base);
	<------><------>return ret;
	<------>}

	<------>fsl_dev->irq = platform_get_irq(pdev, 0);
	<------>if (fsl_dev->irq < 0) {
	<------><------>dev_err(dev, "failed to get irq\n");
	<------><------>return fsl_dev->irq;
	<------>}

	<------>fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
	<------><------><------>&fsl_dcu_regmap_config);
	<------>if (IS_ERR(fsl_dev->regmap)) {
	<------><------>dev_err(dev, "regmap init failed\n");
	<------><------>return PTR_ERR(fsl_dev->regmap);
	<------>}

	<------>fsl_dev->clk = devm_clk_get(dev, "dcu");
	<------>if (IS_ERR(fsl_dev->clk)) {
	<------><------>dev_err(dev, "failed to get dcu clock\n");
	<------><------>return PTR_ERR(fsl_dev->clk);
	<------>}
	<------>ret = clk_prepare_enable(fsl_dev->clk);
	<------>if (ret < 0) {
	<------><------>dev_err(dev, "failed to enable dcu clk\n");
	<------><------>return ret;
	<------>}

	<------>pix_clk_in = devm_clk_get(dev, "pix");
	<------>if (IS_ERR(pix_clk_in)) {
	<------><------>/* legancy binding, use dcu clock as pixel clock input */
	<------><------>pix_clk_in = fsl_dev->clk;
	<------>}

	<------>if (of_property_read_bool(dev->of_node, "big-endian"))
	<------><------>div_ratio_shift = 24;

	<------>pix_clk_in_name = __clk_get_name(pix_clk_in);
	<------>snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
	<------>fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
	<------><------><------>pix_clk_in_name, 0, base + DCU_DIV_RATIO,
	<------><------><------>div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
	<------>if (IS_ERR(fsl_dev->pix_clk)) {
	<------><------>dev_err(dev, "failed to register pix clk\n");
	<------><------>ret = PTR_ERR(fsl_dev->pix_clk);
	<------><------>goto disable_clk;
	<------>}

	<------>fsl_dev->tcon = fsl_tcon_init(dev);

	<------>drm = drm_dev_alloc(driver, dev);
	<------>if (IS_ERR(drm)) {
	<------><------>ret = PTR_ERR(drm);
	<------><------>goto unregister_pix_clk;
	<------>}

	<------>fsl_dev->dev = dev;
	<------>fsl_dev->drm = drm;
	<------>fsl_dev->np = dev->of_node;
	<------>drm->dev_private = fsl_dev;
	<------>dev_set_drvdata(dev, fsl_dev);

	<------>ret = drm_dev_register(drm, 0);
	<------>if (ret < 0)
	<------><------>goto put;

	<------>drm_fbdev_generic_setup(drm, legacyfb_depth);

	<------>return 0;

	put:
	<------>drm_dev_put(drm);
	unregister_pix_clk:
	<------>clk_unregister(fsl_dev->pix_clk);
	disable_clk:
	<------>clk_disable_unprepare(fsl_dev->clk);
	<------>return ret;
	}

	static int fsl_dcu_drm_remove(struct platform_device *pdev)
	{
	<------>struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);

	<------>drm_dev_unregister(fsl_dev->drm);
	<------>drm_dev_put(fsl_dev->drm);
	<------>clk_disable_unprepare(fsl_dev->clk);
	<------>clk_unregister(fsl_dev->pix_clk);

	<------>return 0;
	}

	static struct platform_driver fsl_dcu_drm_platform_driver = {
	<------>.probe = fsl_dcu_drm_probe,
	<------>.remove = fsl_dcu_drm_remove,
	<------>.driver = {
	<------><------>.name = "fsl-dcu",
	<------><------>.pm = &fsl_dcu_drm_pm_ops,
	<------><------>.of_match_table = fsl_dcu_of_match,
	<------>},
	};

	module_platform_driver(fsl_dcu_drm_platform_driver);

	MODULE_DESCRIPTION("Freescale DCU DRM Driver");
	MODULE_LICENSE("GPL");