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From: Pratyush Yadav
To: Jagan Teki , Vignesh Raghavendra
CC: Pratyush Yadav , , Sekhar Nori
Subject: [PATCH 02/15] spi: set mode bits for "spi-rx-dtr" and "spi-tx-dtr"
Date: Wed, 26 Feb 2020 18:25:52 +0530
Message-ID: <20200226125606.22684-3-p.yadav@ti.com>
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These two DT properties express DTR receive and transmit capabilities of
a SPI flash and controller. Introduce two new mode bits: SPI_RX_DTR and
SPI_TX_DTR which correspond to the new DT properties. Set these bits
when the two corresponding properties are present in the device tree.
Signed-off-by: Pratyush Yadav
---
drivers/spi/spi-uclass.c | 9 +++++++++
include/spi.h | 2 ++
2 files changed, 11 insertions(+)
diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
index 4a02d95a34..74e4b5b3ad 100644
--- a/drivers/spi/spi-uclass.c
+++ b/drivers/spi/spi-uclass.c
@@ -435,6 +435,7 @@ int spi_slave_ofdata_to_platdata(struct udevice *dev,
{
int mode = 0;
int value;
+ bool dtr;
plat->cs = dev_read_u32_default(dev, "reg", -1);
plat->max_hz = dev_read_u32_default(dev, "spi-max-frequency",
@@ -487,6 +488,14 @@ int spi_slave_ofdata_to_platdata(struct udevice *dev,
break;
}
+ dtr = dev_read_bool(dev, "spi-rx-dtr");
+ if (dtr)
+ mode |= SPI_RX_DTR;
+
+ dtr = dev_read_bool(dev, "spi-tx-dtr");
+ if (dtr)
+ mode |= SPI_TX_DTR;
+
plat->mode = mode;
return 0;
diff --git a/include/spi.h b/include/spi.h
index 852f570eaa..64558a5145 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -32,6 +32,8 @@
#define SPI_RX_QUAD BIT(13) /* receive with 4 wires */
#define SPI_TX_OCTAL BIT(14) /* transmit with 8 wires */
#define SPI_RX_OCTAL BIT(15) /* receive with 8 wires */
+#define SPI_TX_DTR BIT(16) /* transmit in DTR protocol */
+#define SPI_RX_DTR BIT(17) /* receive in DTR protocol */
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec