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i2c: tegra: Maintain CPU endianness
author
Dmitry Osipenko
<digetx@gmail.com>
Mon, 26 Jan 2015 16:55:02 +0000
(19:55 +0300)
committer
Wolfram Sang
<wsa@the-dreams.de>
Mon, 26 Jan 2015 20:58:43 +0000
(21:58 +0100)
Support CPU BE mode by adding endianness conversion for memcpy interactions.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
drivers/i2c/busses/i2c-tegra.c
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diff --git
a/drivers/i2c/busses/i2c-tegra.c
b/drivers/i2c/busses/i2c-tegra.c
index
28b87e6
..
29f1433
100644
(file)
--- a/
drivers/i2c/busses/i2c-tegra.c
+++ b/
drivers/i2c/busses/i2c-tegra.c
@@
-286,6
+286,7
@@
static int tegra_i2c_empty_rx_fifo(struct tegra_i2c_dev *i2c_dev)
if (rx_fifo_avail > 0 && buf_remaining > 0) {
BUG_ON(buf_remaining > 3);
val = i2c_readl(i2c_dev, I2C_RX_FIFO);
+ val = cpu_to_le32(val);
memcpy(buf, &val, buf_remaining);
buf_remaining = 0;
rx_fifo_avail--;
@@
-344,6
+345,7
@@
static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev)
if (tx_fifo_avail > 0 && buf_remaining > 0) {
BUG_ON(buf_remaining > 3);
memcpy(&val, buf, buf_remaining);
+ val = le32_to_cpu(val);
/* Again update before writing to FIFO to make sure isr sees. */
i2c_dev->msg_buf_remaining = 0;