[PATCH] spi: octeon_spi: Use a fixed 100MHz input clock on Octeon TX2

[Stefan Roese]

Octeon TX2 sets the TB100_EN bit in the config register. We need to use
a fixed 100MHz clock for this as well to work properly.

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Aaron Williams <awilliams at marvell.com>
Cc: Suneel Garapati <sgarapati at marvell.com>
Cc: Chandrakala Chavva <cchavva at marvell.com>
Cc: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/spi/octeon_spi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/octeon_spi.c b/drivers/spi/octeon_spi.c
index 83fe6330a1..7e88e5580f 100644
--- a/drivers/spi/octeon_spi.c
+++ b/drivers/spi/octeon_spi.c
@@ -519,7 +519,10 @@ static int octeon_spi_set_speed(struct udevice *bus, uint max_hz)
 	if (max_hz > OCTEON_SPI_MAX_CLOCK_HZ)
 		max_hz = OCTEON_SPI_MAX_CLOCK_HZ;
 
-	clk_rate = clk_get_rate(&priv->clk);
+	if (device_is_compatible(bus, "cavium,thunderx-spi"))
+		clk_rate = 100000000;
+	else
+		clk_rate = clk_get_rate(&priv->clk);
 	if (IS_ERR_VALUE(clk_rate))
 		return -EINVAL;
 
-- 
2.28.0