aboutsummaryrefslogtreecommitdiff
path: root/drivers/spi
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/Kconfig3
-rw-r--r--drivers/spi/spi-tegra114.c66
-rw-r--r--drivers/spi/spi-tegra20-sflash.c18
-rw-r--r--drivers/spi/spi-tegra20-slink.c66
4 files changed, 76 insertions, 77 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index eb1f1ef5fa2..9fc66e83c1a 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -448,6 +448,7 @@ config SPI_MXS
config SPI_TEGRA114
tristate "NVIDIA Tegra114 SPI Controller"
depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
+ depends on RESET_CONTROLLER
help
SPI driver for NVIDIA Tegra114 SPI Controller interface. This controller
is different than the older SoCs SPI controller and also register interface
@@ -456,6 +457,7 @@ config SPI_TEGRA114
config SPI_TEGRA20_SFLASH
tristate "Nvidia Tegra20 Serial flash Controller"
depends on ARCH_TEGRA || COMPILE_TEST
+ depends on RESET_CONTROLLER
help
SPI driver for Nvidia Tegra20 Serial flash Controller interface.
The main usecase of this controller is to use spi flash as boot
@@ -464,6 +466,7 @@ config SPI_TEGRA20_SFLASH
config SPI_TEGRA20_SLINK
tristate "Nvidia Tegra20/Tegra30 SLINK Controller"
depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
+ depends on RESET_CONTROLLER
help
SPI driver for Nvidia Tegra20/Tegra30 SLINK Controller interface.
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index aaecfb3ebf5..c8604981a05 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -17,7 +17,6 @@
*/
#include <linux/clk.h>
-#include <linux/clk/tegra.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
@@ -34,6 +33,7 @@
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/reset.h>
#include <linux/spi/spi.h>
#define SPI_COMMAND1 0x000
@@ -174,10 +174,10 @@ struct tegra_spi_data {
spinlock_t lock;
struct clk *clk;
+ struct reset_control *rst;
void __iomem *base;
phys_addr_t phys;
unsigned irq;
- int dma_req_sel;
u32 spi_max_frequency;
u32 cur_speed;
@@ -600,15 +600,15 @@ static int tegra_spi_init_dma_param(struct tegra_spi_data *tspi,
dma_addr_t dma_phys;
int ret;
struct dma_slave_config dma_sconfig;
- dma_cap_mask_t mask;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!dma_chan) {
- dev_err(tspi->dev,
- "Dma channel is not available, will try later\n");
- return -EPROBE_DEFER;
+ dma_chan = dma_request_slave_channel_reason(tspi->dev,
+ dma_to_memory ? "rx" : "tx");
+ if (IS_ERR(dma_chan)) {
+ ret = PTR_ERR(dma_chan);
+ if (ret != -EPROBE_DEFER)
+ dev_err(tspi->dev,
+ "Dma channel is not available: %d\n", ret);
+ return ret;
}
dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size,
@@ -619,7 +619,6 @@ static int tegra_spi_init_dma_param(struct tegra_spi_data *tspi,
return -ENOMEM;
}
- dma_sconfig.slave_id = tspi->dma_req_sel;
if (dma_to_memory) {
dma_sconfig.src_addr = tspi->phys + SPI_RX_FIFO;
dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -918,9 +917,9 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_spi_data *tspi)
tspi->status_reg);
dev_err(tspi->dev, "CpuXfer 0x%08x:0x%08x\n",
tspi->command1_reg, tspi->dma_control_reg);
- tegra_periph_reset_assert(tspi->clk);
+ reset_control_assert(tspi->rst);
udelay(2);
- tegra_periph_reset_deassert(tspi->clk);
+ reset_control_deassert(tspi->rst);
complete(&tspi->xfer_completion);
goto exit;
}
@@ -990,9 +989,9 @@ static irqreturn_t handle_dma_based_xfer(struct tegra_spi_data *tspi)
tspi->status_reg);
dev_err(tspi->dev, "DmaXfer 0x%08x:0x%08x\n",
tspi->command1_reg, tspi->dma_control_reg);
- tegra_periph_reset_assert(tspi->clk);
+ reset_control_assert(tspi->rst);
udelay(2);
- tegra_periph_reset_deassert(tspi->clk);
+ reset_control_deassert(tspi->rst);
complete(&tspi->xfer_completion);
spin_unlock_irqrestore(&tspi->lock, flags);
return IRQ_HANDLED;
@@ -1054,11 +1053,6 @@ static void tegra_spi_parse_dt(struct platform_device *pdev,
struct tegra_spi_data *tspi)
{
struct device_node *np = pdev->dev.of_node;
- u32 of_dma[2];
-
- if (of_property_read_u32_array(np, "nvidia,dma-request-selector",
- of_dma, 2) >= 0)
- tspi->dma_req_sel = of_dma[1];
if (of_property_read_u32(np, "spi-max-frequency",
&tspi->spi_max_frequency))
@@ -1127,25 +1121,25 @@ static int tegra_spi_probe(struct platform_device *pdev)
goto exit_free_irq;
}
+ tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+ if (IS_ERR(tspi->rst)) {
+ dev_err(&pdev->dev, "can not get reset\n");
+ ret = PTR_ERR(tspi->rst);
+ goto exit_free_irq;
+ }
+
tspi->max_buf_size = SPI_FIFO_DEPTH << 2;
tspi->dma_buf_size = DEFAULT_SPI_DMA_BUF_LEN;
- if (tspi->dma_req_sel) {
- ret = tegra_spi_init_dma_param(tspi, true);
- if (ret < 0) {
- dev_err(&pdev->dev, "RxDma Init failed, err %d\n", ret);
- goto exit_free_irq;
- }
-
- ret = tegra_spi_init_dma_param(tspi, false);
- if (ret < 0) {
- dev_err(&pdev->dev, "TxDma Init failed, err %d\n", ret);
- goto exit_rx_dma_free;
- }
- tspi->max_buf_size = tspi->dma_buf_size;
- init_completion(&tspi->tx_dma_complete);
- init_completion(&tspi->rx_dma_complete);
- }
+ ret = tegra_spi_init_dma_param(tspi, true);
+ if (ret < 0)
+ goto exit_free_irq;
+ ret = tegra_spi_init_dma_param(tspi, false);
+ if (ret < 0)
+ goto exit_rx_dma_free;
+ tspi->max_buf_size = tspi->dma_buf_size;
+ init_completion(&tspi->tx_dma_complete);
+ init_completion(&tspi->rx_dma_complete);
init_completion(&tspi->xfer_completion);
diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 4dc8e812945..e6f382b3381 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -32,8 +32,8 @@
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/reset.h>
#include <linux/spi/spi.h>
-#include <linux/clk/tegra.h>
#define SPI_COMMAND 0x000
#define SPI_GO BIT(30)
@@ -118,6 +118,7 @@ struct tegra_sflash_data {
spinlock_t lock;
struct clk *clk;
+ struct reset_control *rst;
void __iomem *base;
unsigned irq;
u32 spi_max_frequency;
@@ -389,9 +390,9 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd)
dev_err(tsd->dev,
"CpuXfer 0x%08x:0x%08x\n", tsd->command_reg,
tsd->dma_control_reg);
- tegra_periph_reset_assert(tsd->clk);
+ reset_control_assert(tsd->rst);
udelay(2);
- tegra_periph_reset_deassert(tsd->clk);
+ reset_control_deassert(tsd->rst);
complete(&tsd->xfer_completion);
goto exit;
}
@@ -505,6 +506,13 @@ static int tegra_sflash_probe(struct platform_device *pdev)
goto exit_free_irq;
}
+ tsd->rst = devm_reset_control_get(&pdev->dev, "spi");
+ if (IS_ERR(tsd->rst)) {
+ dev_err(&pdev->dev, "can not get reset\n");
+ ret = PTR_ERR(tsd->rst);
+ goto exit_free_irq;
+ }
+
init_completion(&tsd->xfer_completion);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
@@ -520,9 +528,9 @@ static int tegra_sflash_probe(struct platform_device *pdev)
}
/* Reset controller */
- tegra_periph_reset_assert(tsd->clk);
+ reset_control_assert(tsd->rst);
udelay(2);
- tegra_periph_reset_deassert(tsd->clk);
+ reset_control_deassert(tsd->rst);
tsd->def_command_reg = SPI_M_S | SPI_CS_SW;
tegra_sflash_writel(tsd, tsd->def_command_reg, SPI_COMMAND);
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index e66715ba37e..a728bb82090 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -33,8 +33,8 @@
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/reset.h>
#include <linux/spi/spi.h>
-#include <linux/clk/tegra.h>
#define SLINK_COMMAND 0x000
#define SLINK_BIT_LENGTH(x) (((x) & 0x1f) << 0)
@@ -167,10 +167,10 @@ struct tegra_slink_data {
spinlock_t lock;
struct clk *clk;
+ struct reset_control *rst;
void __iomem *base;
phys_addr_t phys;
unsigned irq;
- int dma_req_sel;
u32 spi_max_frequency;
u32 cur_speed;
@@ -629,15 +629,15 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
dma_addr_t dma_phys;
int ret;
struct dma_slave_config dma_sconfig;
- dma_cap_mask_t mask;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- dma_chan = dma_request_channel(mask, NULL, NULL);
- if (!dma_chan) {
- dev_err(tspi->dev,
- "Dma channel is not available, will try later\n");
- return -EPROBE_DEFER;
+ dma_chan = dma_request_slave_channel_reason(tspi->dev,
+ dma_to_memory ? "rx" : "tx");
+ if (IS_ERR(dma_chan)) {
+ ret = PTR_ERR(dma_chan);
+ if (ret != -EPROBE_DEFER)
+ dev_err(tspi->dev,
+ "Dma channel is not available: %d\n", ret);
+ return ret;
}
dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size,
@@ -648,7 +648,6 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
return -ENOMEM;
}
- dma_sconfig.slave_id = tspi->dma_req_sel;
if (dma_to_memory) {
dma_sconfig.src_addr = tspi->phys + SLINK_RX_FIFO;
dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -884,9 +883,9 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_slink_data *tspi)
dev_err(tspi->dev,
"CpuXfer 0x%08x:0x%08x:0x%08x\n", tspi->command_reg,
tspi->command2_reg, tspi->dma_control_reg);
- tegra_periph_reset_assert(tspi->clk);
+ reset_control_assert(tspi->rst);
udelay(2);
- tegra_periph_reset_deassert(tspi->clk);
+ reset_control_deassert(tspi->rst);
complete(&tspi->xfer_completion);
goto exit;
}
@@ -957,9 +956,9 @@ static irqreturn_t handle_dma_based_xfer(struct tegra_slink_data *tspi)
dev_err(tspi->dev,
"DmaXfer 0x%08x:0x%08x:0x%08x\n", tspi->command_reg,
tspi->command2_reg, tspi->dma_control_reg);
- tegra_periph_reset_assert(tspi->clk);
+ reset_control_assert(tspi->rst);
udelay(2);
- tegra_periph_reset_deassert(tspi->clk);
+ reset_control_assert(tspi->rst);
complete(&tspi->xfer_completion);
spin_unlock_irqrestore(&tspi->lock, flags);
return IRQ_HANDLED;
@@ -1020,11 +1019,6 @@ static irqreturn_t tegra_slink_isr(int irq, void *context_data)
static void tegra_slink_parse_dt(struct tegra_slink_data *tspi)
{
struct device_node *np = tspi->dev->of_node;
- u32 of_dma[2];
-
- if (of_property_read_u32_array(np, "nvidia,dma-request-selector",
- of_dma, 2) >= 0)
- tspi->dma_req_sel = of_dma[1];
if (of_property_read_u32(np, "spi-max-frequency",
&tspi->spi_max_frequency))
@@ -1118,25 +1112,25 @@ static int tegra_slink_probe(struct platform_device *pdev)
goto exit_free_irq;
}
+ tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+ if (IS_ERR(tspi->rst)) {
+ dev_err(&pdev->dev, "can not get reset\n");
+ ret = PTR_ERR(tspi->rst);
+ goto exit_free_irq;
+ }
+
tspi->max_buf_size = SLINK_FIFO_DEPTH << 2;
tspi->dma_buf_size = DEFAULT_SPI_DMA_BUF_LEN;
- if (tspi->dma_req_sel) {
- ret = tegra_slink_init_dma_param(tspi, true);
- if (ret < 0) {
- dev_err(&pdev->dev, "RxDma Init failed, err %d\n", ret);
- goto exit_free_irq;
- }
-
- ret = tegra_slink_init_dma_param(tspi, false);
- if (ret < 0) {
- dev_err(&pdev->dev, "TxDma Init failed, err %d\n", ret);
- goto exit_rx_dma_free;
- }
- tspi->max_buf_size = tspi->dma_buf_size;
- init_completion(&tspi->tx_dma_complete);
- init_completion(&tspi->rx_dma_complete);
- }
+ ret = tegra_slink_init_dma_param(tspi, true);
+ if (ret < 0)
+ goto exit_free_irq;
+ ret = tegra_slink_init_dma_param(tspi, false);
+ if (ret < 0)
+ goto exit_rx_dma_free;
+ tspi->max_buf_size = tspi->dma_buf_size;
+ init_completion(&tspi->tx_dma_complete);
+ init_completion(&tspi->rx_dma_complete);
init_completion(&tspi->xfer_completion);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 21:07:07 +0000