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path: root/drivers/spi/spi-fsl-lpspi.c
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Diffstat (limited to 'drivers/spi/spi-fsl-lpspi.c')
-rw-r--r--drivers/spi/spi-fsl-lpspi.c89
1 files changed, 46 insertions, 43 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index fb68c72df171..11991eb12636 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -17,7 +17,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/dma/imx-dma.h>
@@ -73,7 +72,7 @@
#define CFGR1_PINCFG (BIT(24)|BIT(25))
#define CFGR1_PCSPOL BIT(8)
#define CFGR1_NOSTALL BIT(3)
-#define CFGR1_MASTER BIT(0)
+#define CFGR1_HOST BIT(0)
#define FSR_TXCOUNT (0xFF)
#define RSR_RXEMPTY BIT(1)
#define TCR_CPOL BIT(31)
@@ -97,8 +96,7 @@ struct fsl_lpspi_data {
unsigned long base_phys;
struct clk *clk_ipg;
struct clk *clk_per;
- bool is_slave;
- u32 num_cs;
+ bool is_target;
bool is_only_cs1;
bool is_first_byte;
@@ -115,7 +113,7 @@ struct fsl_lpspi_data {
struct lpspi_config config;
struct completion xfer_done;
- bool slave_aborted;
+ bool target_aborted;
/* DMA */
bool usedma;
@@ -236,7 +234,7 @@ static void fsl_lpspi_write_tx_fifo(struct fsl_lpspi_data *fsl_lpspi)
}
if (txfifo_cnt < fsl_lpspi->txfifosize) {
- if (!fsl_lpspi->is_slave) {
+ if (!fsl_lpspi->is_target) {
temp = readl(fsl_lpspi->base + IMX7ULP_TCR);
temp &= ~TCR_CONTC;
writel(temp, fsl_lpspi->base + IMX7ULP_TCR);
@@ -260,7 +258,7 @@ static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi)
temp |= fsl_lpspi->config.bpw - 1;
temp |= (fsl_lpspi->config.mode & 0x3) << 30;
temp |= (fsl_lpspi->config.chip_select & 0x3) << 24;
- if (!fsl_lpspi->is_slave) {
+ if (!fsl_lpspi->is_target) {
temp |= fsl_lpspi->config.prescale << 27;
/*
* Set TCR_CONT will keep SS asserted after current transfer.
@@ -387,7 +385,7 @@ static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi)
u32 temp;
int ret;
- if (!fsl_lpspi->is_slave) {
+ if (!fsl_lpspi->is_target) {
ret = fsl_lpspi_set_bitrate(fsl_lpspi);
if (ret)
return ret;
@@ -395,8 +393,8 @@ static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi)
fsl_lpspi_set_watermark(fsl_lpspi);
- if (!fsl_lpspi->is_slave)
- temp = CFGR1_MASTER;
+ if (!fsl_lpspi->is_target)
+ temp = CFGR1_HOST;
else
temp = CFGR1_PINCFG;
if (fsl_lpspi->config.mode & SPI_CS_HIGH)
@@ -463,12 +461,12 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller,
return fsl_lpspi_config(fsl_lpspi);
}
-static int fsl_lpspi_slave_abort(struct spi_controller *controller)
+static int fsl_lpspi_target_abort(struct spi_controller *controller)
{
struct fsl_lpspi_data *fsl_lpspi =
spi_controller_get_devdata(controller);
- fsl_lpspi->slave_aborted = true;
+ fsl_lpspi->target_aborted = true;
if (!fsl_lpspi->usedma)
complete(&fsl_lpspi->xfer_done);
else {
@@ -484,9 +482,9 @@ static int fsl_lpspi_wait_for_completion(struct spi_controller *controller)
struct fsl_lpspi_data *fsl_lpspi =
spi_controller_get_devdata(controller);
- if (fsl_lpspi->is_slave) {
+ if (fsl_lpspi->is_target) {
if (wait_for_completion_interruptible(&fsl_lpspi->xfer_done) ||
- fsl_lpspi->slave_aborted) {
+ fsl_lpspi->target_aborted) {
dev_dbg(fsl_lpspi->dev, "interrupted\n");
return -EINTR;
}
@@ -589,9 +587,9 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
reinit_completion(&fsl_lpspi->dma_tx_completion);
dma_async_issue_pending(controller->dma_tx);
- fsl_lpspi->slave_aborted = false;
+ fsl_lpspi->target_aborted = false;
- if (!fsl_lpspi->is_slave) {
+ if (!fsl_lpspi->is_target) {
transfer_timeout = fsl_lpspi_calculate_timeout(fsl_lpspi,
transfer->len);
@@ -617,7 +615,7 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
}
} else {
if (wait_for_completion_interruptible(&fsl_lpspi->dma_tx_completion) ||
- fsl_lpspi->slave_aborted) {
+ fsl_lpspi->target_aborted) {
dev_dbg(fsl_lpspi->dev,
"I/O Error in DMA TX interrupted\n");
dmaengine_terminate_all(controller->dma_tx);
@@ -627,7 +625,7 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
}
if (wait_for_completion_interruptible(&fsl_lpspi->dma_rx_completion) ||
- fsl_lpspi->slave_aborted) {
+ fsl_lpspi->target_aborted) {
dev_dbg(fsl_lpspi->dev,
"I/O Error in DMA RX interrupted\n");
dmaengine_terminate_all(controller->dma_tx);
@@ -702,7 +700,7 @@ static int fsl_lpspi_pio_transfer(struct spi_controller *controller,
fsl_lpspi->remain = t->len;
reinit_completion(&fsl_lpspi->xfer_done);
- fsl_lpspi->slave_aborted = false;
+ fsl_lpspi->target_aborted = false;
fsl_lpspi_write_tx_fifo(fsl_lpspi);
@@ -826,16 +824,17 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
struct spi_controller *controller;
struct resource *res;
int ret, irq;
+ u32 num_cs;
u32 temp;
- bool is_slave;
+ bool is_target;
- is_slave = of_property_read_bool((&pdev->dev)->of_node, "spi-slave");
- if (is_slave)
- controller = spi_alloc_slave(&pdev->dev,
- sizeof(struct fsl_lpspi_data));
+ is_target = of_property_read_bool((&pdev->dev)->of_node, "spi-slave");
+ if (is_target)
+ controller = spi_alloc_target(&pdev->dev,
+ sizeof(struct fsl_lpspi_data));
else
- controller = spi_alloc_master(&pdev->dev,
- sizeof(struct fsl_lpspi_data));
+ controller = spi_alloc_host(&pdev->dev,
+ sizeof(struct fsl_lpspi_data));
if (!controller)
return -ENOMEM;
@@ -844,25 +843,9 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
fsl_lpspi = spi_controller_get_devdata(controller);
fsl_lpspi->dev = &pdev->dev;
- fsl_lpspi->is_slave = is_slave;
+ fsl_lpspi->is_target = is_target;
fsl_lpspi->is_only_cs1 = of_property_read_bool((&pdev->dev)->of_node,
"fsl,spi-only-use-cs1-sel");
- if (of_property_read_u32((&pdev->dev)->of_node, "num-cs",
- &fsl_lpspi->num_cs))
- fsl_lpspi->num_cs = 1;
-
- controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
- controller->transfer_one = fsl_lpspi_transfer_one;
- controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware;
- controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware;
- controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
- controller->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
- controller->dev.of_node = pdev->dev.of_node;
- controller->bus_num = pdev->id;
- controller->num_chipselect = fsl_lpspi->num_cs;
- controller->slave_abort = fsl_lpspi_slave_abort;
- if (!fsl_lpspi->is_slave)
- controller->use_gpio_descriptors = true;
init_completion(&fsl_lpspi->xfer_done);
@@ -912,6 +895,26 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
temp = readl(fsl_lpspi->base + IMX7ULP_PARAM);
fsl_lpspi->txfifosize = 1 << (temp & 0x0f);
fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f);
+ if (of_property_read_u32((&pdev->dev)->of_node, "num-cs",
+ &num_cs)) {
+ if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx93-spi"))
+ num_cs = ((temp >> 16) & 0xf);
+ else
+ num_cs = 1;
+ }
+
+ controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
+ controller->transfer_one = fsl_lpspi_transfer_one;
+ controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware;
+ controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware;
+ controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+ controller->flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX;
+ controller->dev.of_node = pdev->dev.of_node;
+ controller->bus_num = pdev->id;
+ controller->num_chipselect = num_cs;
+ controller->target_abort = fsl_lpspi_target_abort;
+ if (!fsl_lpspi->is_target)
+ controller->use_gpio_descriptors = true;
ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller);
if (ret == -EPROBE_DEFER)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 08:50:27 +0300