[PATCH 3/6] spi: sandbox_spi: Implement speed/mode setup

[Ovidiu Panait]

Implement sandbox_spi_set_{speed, mode} routines, to be able to keep track
of the current bus speed/mode. This will help determine whether the values
passed from dm_spi_claim_bus() are valid.

Signed-off-by: Ovidiu Panait <ovidiu.pan...@windriver.com>
---

 drivers/spi/sandbox_spi.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/spi/sandbox_spi.c b/drivers/spi/sandbox_spi.c
index 412756aa4b..72f22d066f 100644
--- a/drivers/spi/sandbox_spi.c
+++ b/drivers/spi/sandbox_spi.c
@@ -28,6 +28,23 @@
 # define CONFIG_SPI_IDLE_VAL 0xFF
 #endif
 
+/**
+ * struct sandbox_spi_priv - Sandbox SPI private data
+ *
+ * Helper struct to keep track of the sandbox SPI bus internal state. It is
+ * used in unit tests to verify that dm spi functions update the bus
+ * speed/mode properly (for instance, when jumping back and forth between spi
+ * slaves claiming the bus, we need to make sure that the bus speed is updated
+ * accordingly for each slave).
+ *
+ * @speed:     Current bus speed.
+ * @mode:      Current bus mode.
+ */
+struct sandbox_spi_priv {
+       uint speed;
+       uint mode;
+};
+
 __weak int sandbox_spi_get_emul(struct sandbox_state *state,
                                struct udevice *bus, struct udevice *slave,
                                struct udevice **emulp)
@@ -90,11 +107,19 @@ static int sandbox_spi_xfer(struct udevice *slave, 
unsigned int bitlen,
 
 static int sandbox_spi_set_speed(struct udevice *bus, uint speed)
 {
+       struct sandbox_spi_priv *priv = dev_get_priv(bus);
+
+       priv->speed = speed;
+
        return 0;
 }
 
 static int sandbox_spi_set_mode(struct udevice *bus, uint mode)
 {
+       struct sandbox_spi_priv *priv = dev_get_priv(bus);
+
+       priv->mode = mode;
+
        return 0;
 }
 
@@ -136,4 +161,5 @@ U_BOOT_DRIVER(sandbox_spi) = {
        .id     = UCLASS_SPI,
        .of_match = sandbox_spi_ids,
        .ops    = &sandbox_spi_ops,
+       .priv_auto_alloc_size = sizeof(struct sandbox_spi_priv),
 };
-- 
2.17.1