On 17/03/2022 01:20, Krishna Yarlagadda wrote:
Controller can poll for wait state inserted by TPM device and
handle it.
Signed-off-by: Krishna Yarlagadda <kyarlagadda@xxxxxxxxxx>
---
drivers/spi/spi-tegra210-quad.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index a2e225e8f7f0..ecf171bfcdce 100644
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -142,6 +142,7 @@
#define QSPI_GLOBAL_CONFIG 0X1a4
#define QSPI_CMB_SEQ_EN BIT(0)
+#define QSPI_TPM_WAIT_POLL_EN BIT(1)
#define QSPI_CMB_SEQ_ADDR 0x1a8
#define QSPI_ADDRESS_VALUE_SET(X) (((x) & 0xFFFF) << 0)
@@ -165,11 +166,13 @@ struct tegra_qspi_soc_data {
bool has_dma;
bool cmb_xfer_capable;
bool cs_count;
+ bool has_wait_polling;
};
struct tegra_qspi_client_data {
int tx_clk_tap_delay;
int rx_clk_tap_delay;
+ bool wait_polling;
};
struct tegra_qspi {
@@ -833,6 +836,11 @@ static u32 tegra_qspi_setup_transfer_one(struct spi_device *spi, struct spi_tran
else
command1 |= QSPI_CONTROL_MODE_0;
+ if (tqspi->soc_data->cmb_xfer_capable)
+ command1 &= ~QSPI_CS_SW_HW;
+ else
+ command1 |= QSPI_CS_SW_HW;
+
if (spi->mode & SPI_CS_HIGH)
command1 |= QSPI_CS_SW_VAL;
else
@@ -917,6 +925,7 @@ static int tegra_qspi_start_transfer_one(struct spi_device *spi,
static struct tegra_qspi_client_data *tegra_qspi_parse_cdata_dt(struct spi_device *spi)
{
+ struct tegra_qspi *tqspi = spi_master_get_devdata(spi->master);
struct tegra_qspi_client_data *cdata;
cdata = devm_kzalloc(&spi->dev, sizeof(*cdata), GFP_KERNEL);
@@ -927,6 +936,11 @@ static struct tegra_qspi_client_data *tegra_qspi_parse_cdata_dt(struct spi_devic
&cdata->tx_clk_tap_delay);
device_property_read_u32(&spi->dev, "nvidia,rx-clk-tap-delay",
&cdata->rx_clk_tap_delay);
+ if (tqspi->soc_data->has_wait_polling)
+ cdata->wait_polling = device_property_read_bool
+ (&spi->dev,
+ "nvidia,wait-polling");
+
This looks odd. Why do we need this device-tree property if it is
already specified in the SoC data?
Jon
--
nvpublic
