[PATCH v1 3/5] spi: pxa2xx: Remove DMA parameters from struct chip_data

Andy Shevchenko
2024-04-03T17:15:59Z

The DMA related fields are set once and never modified. It effectively
repeats the content of the same fields in struct pxa2xx_spi_controller.
With that, remove DMA parameters from struct chip_data.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/spi/spi-pxa2xx-dma.c | 22 ++------------------
drivers/spi/spi-pxa2xx.c | 40 +++++++-----------------------------
drivers/spi/spi-pxa2xx.h | 8 --------
3 files changed, 9 insertions(+), 61 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index d77279c3acd8..08cb6e96ac94 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -68,8 +68,6 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data,
enum dma_transfer_direction dir,
struct spi_transfer *xfer)
{
- struct chip_data *chip =
- spi_get_ctldata(drv_data->controller->cur_msg->spi);
enum dma_slave_buswidth width;
struct dma_slave_config cfg;
struct dma_chan *chan;
@@ -94,14 +92,14 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data,
if (dir == DMA_MEM_TO_DEV) {
cfg.dst_addr = drv_data->ssp->phys_base + SSDR;
cfg.dst_addr_width = width;
- cfg.dst_maxburst = chip->dma_burst_size;
+ cfg.dst_maxburst = drv_data->controller_info->dma_burst_size;

sgt = &xfer->tx_sg;
chan = drv_data->controller->dma_tx;
} else {
cfg.src_addr = drv_data->ssp->phys_base + SSDR;
cfg.src_addr_width = width;
- cfg.src_maxburst = chip->dma_burst_size;
+ cfg.src_maxburst = drv_data->controller_info->dma_burst_size;

sgt = &xfer->rx_sg;
chan = drv_data->controller->dma_rx;
@@ -225,19 +223,3 @@ void pxa2xx_spi_dma_release(struct driver_data *drv_data)
controller->dma_tx = NULL;
}
}
-
-int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
- struct spi_device *spi,
- u8 bits_per_word, u32 *burst_code,
- u32 *threshold)
-{
- struct driver_data *drv_data = spi_controller_get_devdata(spi->controller);
- u32 dma_burst_size = drv_data->controller_info->dma_burst_size;
-
- /* We use the default the DMA burst size and FIFO thresholds for now */
- *burst_code = dma_burst_size;
- *threshold = SSCR1_RxTresh(RX_THRESH_DFLT)
- | SSCR1_TxTresh(TX_THRESH_DFLT);
-
- return 0;
-}
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 00aa33c937bf..3ba0f5816f7f 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -934,11 +934,11 @@ static bool pxa2xx_spi_can_dma(struct spi_controller *controller,
struct spi_device *spi,
struct spi_transfer *xfer)
{
- struct chip_data *chip = spi_get_ctldata(spi);
+ struct driver_data *drv_data = spi_controller_get_devdata(controller);

- return chip->enable_dma &&
+ return drv_data->controller_info->enable_dma &&
xfer->len <= MAX_DMA_LEN &&
- xfer->len >= chip->dma_burst_size;
+ xfer->len >= drv_data->controller_info->dma_burst_size;
}

static int pxa2xx_spi_transfer_one(struct spi_controller *controller,
@@ -947,9 +947,8 @@ static int pxa2xx_spi_transfer_one(struct spi_controller *controller,
{
struct driver_data *drv_data = spi_controller_get_devdata(controller);
struct chip_data *chip = spi_get_ctldata(spi);
- u32 dma_thresh = chip->dma_threshold;
- u32 dma_burst = chip->dma_burst_size;
u32 change_mask = pxa2xx_spi_get_ssrc1_change_mask(drv_data);
+ u32 dma_thresh;
u32 clk_div;
u8 bits;
u32 speed;
@@ -959,7 +958,7 @@ static int pxa2xx_spi_transfer_one(struct spi_controller *controller,
int dma_mapped;

/* Check if we can DMA this transfer */
- if (transfer->len > MAX_DMA_LEN && chip->enable_dma) {
+ if (transfer->len > MAX_DMA_LEN && drv_data->controller_info->enable_dma) {
/* Warn ... we force this to PIO mode */
dev_warn_ratelimited(&spi->dev,
"DMA disabled for transfer length %u greater than %d\n",
@@ -995,19 +994,8 @@ static int pxa2xx_spi_transfer_one(struct spi_controller *controller,
drv_data->read = drv_data->rx ? u32_reader : null_reader;
drv_data->write = drv_data->tx ? u32_writer : null_writer;
}
- /*
- * If bits per word is changed in DMA mode, then must check
- * the thresholds and burst also.
- */
- if (chip->enable_dma) {
- if (pxa2xx_spi_set_dma_burst_and_threshold(chip,
- spi,
- bits, &dma_burst,
- &dma_thresh))
- dev_warn_ratelimited(&spi->dev,
- "DMA burst size reduced to match bits_per_word\n");
- }

+ dma_thresh = SSCR1_RxTresh(RX_THRESH_DFLT) | SSCR1_TxTresh(TX_THRESH_DFLT);
dma_mapped = controller->can_dma &&
controller->can_dma(controller, spi, transfer) &&
controller->cur_msg_mapped;
@@ -1213,7 +1201,6 @@ static int setup(struct spi_device *spi)
if (!chip)
return -ENOMEM;

- chip->enable_dma = drv_data->controller_info->enable_dma;
chip->timeout = TIMOUT_DFLT;
}

@@ -1236,20 +1223,6 @@ static int setup(struct spi_device *spi)
chip->lpss_tx_threshold = tx_thres;
}

- if (chip->enable_dma) {
- /* Set up legal burst and threshold for DMA */
- if (pxa2xx_spi_set_dma_burst_and_threshold(chip, spi,
- spi->bits_per_word,
- &chip->dma_burst_size,
- &chip->dma_threshold)) {
- dev_warn(&spi->dev,
- "in setup: DMA burst size reduced to match bits_per_word\n");
- }
- dev_dbg(&spi->dev,
- "in setup: DMA burst size set to %u\n",
- chip->dma_burst_size);
- }
-
switch (drv_data->ssp_type) {
case QUARK_X1000_SSP:
chip->threshold = (QUARK_X1000_SSCR1_RxTresh(rx_thres)
@@ -1439,6 +1412,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
if (IS_ERR(platform_info))
return dev_err_probe(dev, PTR_ERR(platform_info), "missing platform data\n");
}
+ dev_dbg(dev, "DMA burst size set to %u\n", platform_info->dma_burst_size);

ssp = pxa_ssp_request(pdev->id, pdev->name);
if (!ssp)
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
index ae9c99bc9f6c..10294ef209d9 100644
--- a/drivers/spi/spi-pxa2xx.h
+++ b/drivers/spi/spi-pxa2xx.h
@@ -79,9 +79,6 @@ struct chip_data {
u32 cr1;
u32 dds_rate;
u32 timeout;
- u8 enable_dma;
- u32 dma_burst_size;
- u32 dma_threshold;
u32 threshold;
u16 lpss_rx_threshold;
u16 lpss_tx_threshold;
@@ -142,10 +139,5 @@ extern void pxa2xx_spi_dma_start(struct driver_data *drv_data);
extern void pxa2xx_spi_dma_stop(struct driver_data *drv_data);
extern int pxa2xx_spi_dma_setup(struct driver_data *drv_data);
extern void pxa2xx_spi_dma_release(struct driver_data *drv_data);
-extern int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
- struct spi_device *spi,
- u8 bits_per_word,
- u32 *burst_code,
- u32 *threshold);

#endif /* SPI_PXA2XX_H */
--
2.43.0.rc1.1.gbec44491f096