linux/drivers/memory/brcmstb_memc.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * DDR Self-Refresh Power Down (SRPD) support for Broadcom STB SoCs
 *
 */

#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>

#define REG_MEMC_CNTRLR_CONFIG …
#define CNTRLR_CONFIG_LPDDR4_SHIFT …
#define CNTRLR_CONFIG_MASK …
#define REG_MEMC_SRPD_CFG_21 …
#define REG_MEMC_SRPD_CFG_20 …
#define REG_MEMC_SRPD_CFG_1x …
#define INACT_COUNT_SHIFT …
#define INACT_COUNT_MASK …
#define SRPD_EN_SHIFT …

struct brcmstb_memc_data { … };

struct brcmstb_memc { … };

static int brcmstb_memc_uses_lpddr4(struct brcmstb_memc *memc)
{ … }

static int brcmstb_memc_srpd_config(struct brcmstb_memc *memc,
				    unsigned int cycles)
{ … }

static ssize_t frequency_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{ … }

static ssize_t srpd_show(struct device *dev,
			 struct device_attribute *attr, char *buf)
{ … }

static ssize_t srpd_store(struct device *dev, struct device_attribute *attr,
			  const char *buf, size_t count)
{ … }

static DEVICE_ATTR_RO(frequency);
static DEVICE_ATTR_RW(srpd);

static struct attribute *dev_attrs[] = …;

static struct attribute_group dev_attr_group = …;

static int brcmstb_memc_probe(struct platform_device *pdev)
{ … }

static void brcmstb_memc_remove(struct platform_device *pdev)
{ … }

enum brcmstb_memc_hwtype { … };

static const struct brcmstb_memc_data brcmstb_memc_versions[] = …;

static const struct of_device_id brcmstb_memc_of_match[] = …;
MODULE_DEVICE_TABLE(of, brcmstb_memc_of_match);

static int brcmstb_memc_suspend(struct device *dev)
{ … }

static int brcmstb_memc_resume(struct device *dev)
{ … }

static DEFINE_SIMPLE_DEV_PM_OPS(brcmstb_memc_pm_ops, brcmstb_memc_suspend,
				brcmstb_memc_resume);

static struct platform_driver brcmstb_memc_driver = …;
module_platform_driver(…) …;

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;