From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Mon, 15 Apr 2019 21:30:26 +0000 (-0700)
Subject: spi: tegra114: fix PIO transfer
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cc1b69fc5f9f52cf18295db05cad57187cee1c1d;p=linux.git

spi: tegra114: fix PIO transfer

This patch fixes PIO mode transfer to use PIO bit in SPI_COMMAND1 register.
Current driver uses DMA_EN instead of PIO bit.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index b57f10182faef..21e4fdad013f3 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -641,8 +641,9 @@ static int tegra_spi_start_cpu_based_transfer(
 
 	tspi->is_curr_dma_xfer = false;
 
-	val |= SPI_DMA_EN;
-	tegra_spi_writel(tspi, val, SPI_DMA_CTL);
+	val = tspi->command1_reg;
+	val |= SPI_PIO;
+	tegra_spi_writel(tspi, val, SPI_COMMAND1);
 	return 0;
 }