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spi: imx: replace multiple watermarks with single for RX, TX and RXT

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There is no need to have different watermarks levels since they are the same.
Merge them into one WML parameter.

Signed-off-by: Anton Bondarenko <anton.bondarenko.sama@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Anton Bondarenko 2015-12-05 17:57:01 +01:00 committed by Mark Brown
parent fab44ef1ad
commit 0dfbaa8932
1 changed files with 13 additions and 16 deletions
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29
drivers/spi/spi-imx.c
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@ -104,9 +104,7 @@ struct spi_imx_data {
unsigned int dma_is_inited;
unsigned int dma_finished;
bool usedma;
u32 rx_wml;
u32 tx_wml;
u32 rxt_wml;
u32 wml;
struct completion dma_rx_completion;
struct completion dma_tx_completion;
@ -201,9 +199,8 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
{
struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
if (spi_imx->dma_is_inited
&& transfer->len > spi_imx->rx_wml * sizeof(u32)
&& transfer->len > spi_imx->tx_wml * sizeof(u32))
if (spi_imx->dma_is_inited &&
transfer->len > spi_imx->wml * sizeof(u32))
return true;
return false;
}
@ -388,10 +385,9 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx,
if (spi_imx->dma_is_inited) {
dma = readl(spi_imx->base + MX51_ECSPI_DMA);
spi_imx->rxt_wml = spi_imx_get_fifosize(spi_imx) / 2;
rx_wml_cfg = spi_imx->rx_wml << MX51_ECSPI_DMA_RX_WML_OFFSET;
tx_wml_cfg = spi_imx->tx_wml << MX51_ECSPI_DMA_TX_WML_OFFSET;
rxt_wml_cfg = spi_imx->rxt_wml << MX51_ECSPI_DMA_RXT_WML_OFFSET;
rx_wml_cfg = spi_imx->wml << MX51_ECSPI_DMA_RX_WML_OFFSET;
tx_wml_cfg = spi_imx->wml << MX51_ECSPI_DMA_TX_WML_OFFSET;
rxt_wml_cfg = spi_imx->wml << MX51_ECSPI_DMA_RXT_WML_OFFSET;
dma = (dma & ~MX51_ECSPI_DMA_TX_WML_MASK
& ~MX51_ECSPI_DMA_RX_WML_MASK
& ~MX51_ECSPI_DMA_RXT_WML_MASK)
@ -842,6 +838,8 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
if (of_machine_is_compatible("fsl,imx6dl"))
return 0;
spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2;
/* Prepare for TX DMA: */
master->dma_tx = dma_request_slave_channel(dev, "tx");
if (!master->dma_tx) {
@ -853,7 +851,7 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
slave_config.direction = DMA_MEM_TO_DEV;
slave_config.dst_addr = res->start + MXC_CSPITXDATA;
slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
slave_config.dst_maxburst = spi_imx_get_fifosize(spi_imx) / 2;
slave_config.dst_maxburst = spi_imx->wml;
ret = dmaengine_slave_config(master->dma_tx, &slave_config);
if (ret) {
dev_err(dev, "error in TX dma configuration.\n");
@ -871,7 +869,7 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
slave_config.direction = DMA_DEV_TO_MEM;
slave_config.src_addr = res->start + MXC_CSPIRXDATA;
slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
slave_config.src_maxburst = spi_imx_get_fifosize(spi_imx) / 2;
slave_config.src_maxburst = spi_imx->wml;
ret = dmaengine_slave_config(master->dma_rx, &slave_config);
if (ret) {
dev_err(dev, "error in RX dma configuration.\n");
@ -884,8 +882,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
master->max_dma_len = MAX_SDMA_BD_BYTES;
spi_imx->bitbang.master->flags = SPI_MASTER_MUST_RX |
SPI_MASTER_MUST_TX;
spi_imx->tx_wml = spi_imx_get_fifosize(spi_imx) / 2;
spi_imx->rx_wml = spi_imx_get_fifosize(spi_imx) / 2;
spi_imx->dma_is_inited = 1;
return 0;
@ -952,7 +948,7 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
dma = readl(spi_imx->base + MX51_ECSPI_DMA);
dma = dma & (~MX51_ECSPI_DMA_RXT_WML_MASK);
/* Change RX_DMA_LENGTH trigger dma fetch tail data */
left = transfer->len % spi_imx->rxt_wml;
left = transfer->len % spi_imx->wml;
if (left)
writel(dma | (left << MX51_ECSPI_DMA_RXT_WML_OFFSET),
spi_imx->base + MX51_ECSPI_DMA);
@ -987,8 +983,9 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
spi_imx->devtype_data->reset(spi_imx);
dmaengine_terminate_all(master->dma_rx);
}
dma &= ~MX51_ECSPI_DMA_RXT_WML_MASK;
writel(dma |
spi_imx->rxt_wml << MX51_ECSPI_DMA_RXT_WML_OFFSET,
spi_imx->wml << MX51_ECSPI_DMA_RXT_WML_OFFSET,
spi_imx->base + MX51_ECSPI_DMA);
}