spi/tegra-slink: remove redundant code

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@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 1 insertions, 31 deletions

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 17224f0f4d56..d35315408f64 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;
@@ -717,7 +716,6 @@ 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;
 
@@ -740,39 +738,11 @@ 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;