diff options
| author | Stephen Warren <swarren@nvidia.com> | 2013-02-15 15:03:47 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-04-07 10:07:57 +0100 |
| commit | ede2738a73f44885cc92655bda158dce6712a3c7 (patch) | |
| tree | 05c13853f80f7a4f4f18f51b57553e6456f0274f /drivers/spi/spi-tegra20-slink.c | |
| parent | 76a7498f691f4c315dba0747141eeee3ceb740dc (diff) | |
| download | lwn-ede2738a73f44885cc92655bda158dce6712a3c7.tar.gz lwn-ede2738a73f44885cc92655bda158dce6712a3c7.zip | |
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>
Diffstat (limited to 'drivers/spi/spi-tegra20-slink.c')
| -rw-r--r-- | drivers/spi/spi-tegra20-slink.c | 32 |
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; |