From: Stephen Warren <swarren@xxxxxxxxxx>
There is no code to set spi->controller_data, and hence the HW CS logic
can never trigger. Remove the unused code.
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
drivers/spi/spi-tegra20-slink.c | 32 +-------------------------------
1 file changed, 1 insertion(+), 31 deletions(-)
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index b8698b3..00f1b06 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -189,7 +189,6 @@ struct tegra_slink_data {
unsigned dma_buf_size;
unsigned max_buf_size;
bool is_curr_dma_xfer;
- bool is_hw_based_cs;
struct completion rx_dma_complete;
struct completion tx_dma_complete;
@@ -720,7 +719,6 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi,
u8 bits_per_word;
unsigned total_fifo_words;
int ret;
- struct tegra_spi_device_controller_data *cdata = spi->controller_data;
unsigned long command;
unsigned long command2;
@@ -743,39 +741,11 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi,
command = tspi->def_command_reg;
command |= SLINK_BIT_LENGTH(bits_per_word - 1);
+ command |= SLINK_CS_SW | SLINK_CS_VALUE;
command2 = tspi->def_command2_reg;
command2 |= SLINK_SS_EN_CS(spi->chip_select);
- /* possibly use the hw based chip select */
- tspi->is_hw_based_cs = false;
- if (cdata && cdata->is_hw_based_cs && is_single_xfer &&
- ((tspi->curr_dma_words * tspi->bytes_per_word) ==
- (t->len - tspi->cur_pos))) {
- int setup_count;
- int sts2;
-
- setup_count = cdata->cs_setup_clk_count >> 1;
- setup_count = max(setup_count, 3);
- command2 |= SLINK_SS_SETUP(setup_count);
- if (tspi->chip_data->cs_hold_time) {
- int hold_count;
-
- hold_count = cdata->cs_hold_clk_count;
- hold_count = max(hold_count, 0xF);
- sts2 = tegra_slink_readl(tspi, SLINK_STATUS2);
- sts2 &= ~SLINK_SS_HOLD_TIME(0xF);
- sts2 |= SLINK_SS_HOLD_TIME(hold_count);
- tegra_slink_writel(tspi, sts2, SLINK_STATUS2);
- }
- tspi->is_hw_based_cs = true;
- }
-
- if (tspi->is_hw_based_cs)
- command &= ~SLINK_CS_SW;
- else
- command |= SLINK_CS_SW | SLINK_CS_VALUE;
-
command &= ~SLINK_MODES;
if (spi->mode & SPI_CPHA)
command |= SLINK_CK_SDA;
--
1.7.10.4
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