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spi: Get rid of the spi_flash_read() API

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This API has been replaced by the spi_mem_xx() one, its only user
(spi-nor) has been converted to spi_mem_xx() and all SPI controller
drivers that were implementing the ->spi_flash_xxx() hooks are also
implementing the spi_mem ones. So we can safely get rid of this API.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@exceet.de>
Tested-by: Frieder Schrempf <frieder.schrempf@exceet.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Boris Brezillon 2018-04-26 18:18:20 +02:00 committed by Mark Brown
parent 4120f8d158
commit c1f5ba70de
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GPG key ID: 24D68B725D5487D0
3 changed files with 0 additions and 151 deletions
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41
drivers/spi/spi-ti-qspi.c
View file

@ -531,44 +531,6 @@ static void ti_qspi_setup_mmap_read(struct spi_device *spi, u8 opcode,
QSPI_SPI_SETUP_REG(spi->chip_select));
}
static bool ti_qspi_spi_flash_can_dma(struct spi_device *spi,
struct spi_flash_read_message *msg)
{
return virt_addr_valid(msg->buf);
}
static int ti_qspi_spi_flash_read(struct spi_device *spi,
struct spi_flash_read_message *msg)
{
struct ti_qspi *qspi = spi_master_get_devdata(spi->master);
int ret = 0;
mutex_lock(&qspi->list_lock);
if (!qspi->mmap_enabled)
ti_qspi_enable_memory_map(spi);
ti_qspi_setup_mmap_read(spi, msg->read_opcode, msg->data_nbits,
msg->addr_width, msg->dummy_bytes);
if (qspi->rx_chan) {
if (msg->cur_msg_mapped)
ret = ti_qspi_dma_xfer_sg(qspi, msg->rx_sg, msg->from);
else
ret = ti_qspi_dma_bounce_buffer(qspi, msg->from,
msg->buf, msg->len);
if (ret)
goto err_unlock;
} else {
memcpy_fromio(msg->buf, qspi->mmap_base + msg->from, msg->len);
}
msg->retlen = msg->len;
err_unlock:
mutex_unlock(&qspi->list_lock);
return ret;
}
static int ti_qspi_exec_mem_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
@ -727,7 +689,6 @@ static int ti_qspi_probe(struct platform_device *pdev)
master->dev.of_node = pdev->dev.of_node;
master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
SPI_BPW_MASK(8);
master->spi_flash_read = ti_qspi_spi_flash_read;
master->mem_ops = &ti_qspi_mem_ops;
if (!of_property_read_u32(np, "num-cs", &num_cs))
@ -827,7 +788,6 @@ static int ti_qspi_probe(struct platform_device *pdev)
dma_release_channel(qspi->rx_chan);
goto no_dma;
}
master->spi_flash_can_dma = ti_qspi_spi_flash_can_dma;
master->dma_rx = qspi->rx_chan;
init_completion(&qspi->transfer_complete);
if (res_mmap)
@ -841,7 +801,6 @@ static int ti_qspi_probe(struct platform_device *pdev)
"mmap failed with error %ld using PIO mode\n",
PTR_ERR(qspi->mmap_base));
qspi->mmap_base = NULL;
master->spi_flash_read = NULL;
master->mem_ops = NULL;
}
}

57
drivers/spi/spi.c
View file

@ -3055,63 +3055,6 @@ int spi_async_locked(struct spi_device *spi, struct spi_message *message)
}
EXPORT_SYMBOL_GPL(spi_async_locked);
int spi_flash_read(struct spi_device *spi,
struct spi_flash_read_message *msg)
{
struct spi_controller *master = spi->controller;
struct device *rx_dev = NULL;
int ret;
if ((msg->opcode_nbits == SPI_NBITS_DUAL ||
msg->addr_nbits == SPI_NBITS_DUAL) &&
!(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD)))
return -EINVAL;
if ((msg->opcode_nbits == SPI_NBITS_QUAD ||
msg->addr_nbits == SPI_NBITS_QUAD) &&
!(spi->mode & SPI_TX_QUAD))
return -EINVAL;
if (msg->data_nbits == SPI_NBITS_DUAL &&
!(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD)))
return -EINVAL;
if (msg->data_nbits == SPI_NBITS_QUAD &&
!(spi->mode & SPI_RX_QUAD))
return -EINVAL;
if (master->auto_runtime_pm) {
ret = pm_runtime_get_sync(master->dev.parent);
if (ret < 0) {
dev_err(&master->dev, "Failed to power device: %d\n",
ret);
return ret;
}
}
mutex_lock(&master->bus_lock_mutex);
mutex_lock(&master->io_mutex);
if (master->dma_rx && master->spi_flash_can_dma(spi, msg)) {
rx_dev = master->dma_rx->device->dev;
ret = spi_map_buf(master, rx_dev, &msg->rx_sg,
msg->buf, msg->len,
DMA_FROM_DEVICE);
if (!ret)
msg->cur_msg_mapped = true;
}
ret = master->spi_flash_read(spi, msg);
if (msg->cur_msg_mapped)
spi_unmap_buf(master, rx_dev, &msg->rx_sg,
DMA_FROM_DEVICE);
mutex_unlock(&master->io_mutex);
mutex_unlock(&master->bus_lock_mutex);
if (master->auto_runtime_pm)
pm_runtime_put(master->dev.parent);
return ret;
}
EXPORT_SYMBOL_GPL(spi_flash_read);
/*-------------------------------------------------------------------------*/
/* Utility methods for SPI protocol drivers, layered on

53
include/linux/spi/spi.h
View file

@ -26,7 +26,6 @@ struct dma_chan;
struct property_entry;
struct spi_controller;
struct spi_transfer;
struct spi_flash_read_message;
struct spi_controller_mem_ops;
/*
@ -382,11 +381,6 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
* controller has native support for memory like operations.
* @unprepare_message: undo any work done by prepare_message().
* @slave_abort: abort the ongoing transfer request on an SPI slave controller
* @spi_flash_read: to support spi-controller hardwares that provide
* accelerated interface to read from flash devices.
* @spi_flash_can_dma: analogous to can_dma() interface, but for
* controllers implementing spi_flash_read.
* @flash_read_supported: spi device supports flash read
* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
* number. Any individual value may be -ENOENT for CS lines that
* are not GPIOs (driven by the SPI controller itself).
@ -552,11 +546,6 @@ struct spi_controller {
int (*unprepare_message)(struct spi_controller *ctlr,
struct spi_message *message);
int (*slave_abort)(struct spi_controller *ctlr);
int (*spi_flash_read)(struct spi_device *spi,
struct spi_flash_read_message *msg);
bool (*spi_flash_can_dma)(struct spi_device *spi,
struct spi_flash_read_message *msg);
bool (*flash_read_supported)(struct spi_device *spi);
/*
* These hooks are for drivers that use a generic implementation
@ -1190,48 +1179,6 @@ static inline ssize_t spi_w8r16be(struct spi_device *spi, u8 cmd)
return be16_to_cpu(result);
}
/**
* struct spi_flash_read_message - flash specific information for
* spi-masters that provide accelerated flash read interfaces
* @buf: buffer to read data
* @from: offset within the flash from where data is to be read
* @len: length of data to be read
* @retlen: actual length of data read
* @read_opcode: read_opcode to be used to communicate with flash
* @addr_width: number of address bytes
* @dummy_bytes: number of dummy bytes
* @opcode_nbits: number of lines to send opcode
* @addr_nbits: number of lines to send address
* @data_nbits: number of lines for data
* @rx_sg: Scatterlist for receive data read from flash
* @cur_msg_mapped: message has been mapped for DMA
*/
struct spi_flash_read_message {
void *buf;
loff_t from;
size_t len;
size_t retlen;
u8 read_opcode;
u8 addr_width;
u8 dummy_bytes;
u8 opcode_nbits;
u8 addr_nbits;
u8 data_nbits;
struct sg_table rx_sg;
bool cur_msg_mapped;
};
/* SPI core interface for flash read support */
static inline bool spi_flash_read_supported(struct spi_device *spi)
{
return spi->controller->spi_flash_read &&
(!spi->controller->flash_read_supported ||
spi->controller->flash_read_supported(spi));
}
int spi_flash_read(struct spi_device *spi,
struct spi_flash_read_message *msg);
/*---------------------------------------------------------------------------*/
/*