linux/drivers/spi/spi-npcm-pspi.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018 Nuvoton Technology corporation.

#include <linux/kernel.h>
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/reset.h>

#include <asm/unaligned.h>

#include <linux/regmap.h>
#include <linux/mfd/syscon.h>

struct npcm_pspi { … };

#define DRIVER_NAME …

#define NPCM_PSPI_DATA …
#define NPCM_PSPI_CTL1 …
#define NPCM_PSPI_STAT …

/* definitions for control and status register */
#define NPCM_PSPI_CTL1_SPIEN …
#define NPCM_PSPI_CTL1_MOD …
#define NPCM_PSPI_CTL1_EIR …
#define NPCM_PSPI_CTL1_EIW …
#define NPCM_PSPI_CTL1_SCM …
#define NPCM_PSPI_CTL1_SCIDL …
#define NPCM_PSPI_CTL1_SCDV6_0 …

#define NPCM_PSPI_STAT_BSY …
#define NPCM_PSPI_STAT_RBF …

/* general definitions */
#define NPCM_PSPI_TIMEOUT_MS …
#define NPCM_PSPI_MAX_CLK_DIVIDER …
#define NPCM_PSPI_MIN_CLK_DIVIDER …
#define NPCM_PSPI_DEFAULT_CLK …

static inline unsigned int bytes_per_word(unsigned int bits)
{ … }

static inline void npcm_pspi_irq_enable(struct npcm_pspi *priv, u16 mask)
{ … }

static inline void npcm_pspi_irq_disable(struct npcm_pspi *priv, u16 mask)
{ … }

static inline void npcm_pspi_enable(struct npcm_pspi *priv)
{ … }

static inline void npcm_pspi_disable(struct npcm_pspi *priv)
{ … }

static void npcm_pspi_set_mode(struct spi_device *spi)
{ … }

static void npcm_pspi_set_transfer_size(struct npcm_pspi *priv, int size)
{ … }

static void npcm_pspi_set_baudrate(struct npcm_pspi *priv, unsigned int speed)
{ … }

static void npcm_pspi_setup_transfer(struct spi_device *spi,
				     struct spi_transfer *t)
{ … }

static void npcm_pspi_send(struct npcm_pspi *priv)
{ … }

static void npcm_pspi_recv(struct npcm_pspi *priv)
{ … }

static int npcm_pspi_transfer_one(struct spi_controller *host,
				  struct spi_device *spi,
				  struct spi_transfer *t)
{ … }

static int npcm_pspi_prepare_transfer_hardware(struct spi_controller *host)
{ … }

static int npcm_pspi_unprepare_transfer_hardware(struct spi_controller *host)
{ … }

static void npcm_pspi_reset_hw(struct npcm_pspi *priv)
{ … }

static irqreturn_t npcm_pspi_handler(int irq, void *dev_id)
{ … }

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

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

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

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

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