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| author | Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com> | 2014-07-24 10:53:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-27 11:10:42 -0700 |
| commit | ee5311420d03eccee02e447e698d2fda6c25583d (patch) | |
| tree | 51d88a3dec6db3b6c0179bf6c6538721ad810e4b /drivers/misc | |
| parent | 4dcc2ab3f869c5ecdcf4edfe5308767121f8a136 (diff) | |
| download | linux-stable-ee5311420d03eccee02e447e698d2fda6c25583d.tar.gz linux-stable-ee5311420d03eccee02e447e698d2fda6c25583d.tar.bz2 linux-stable-ee5311420d03eccee02e447e698d2fda6c25583d.zip | |
Lattice ECP3 FPGA: Correct endianness
This code corrects endianness and avoids a sparse error.
Tested with Lattice ECP3-35 with Freescale i.MX6.
It also sends uevent in order to load it.
Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/lattice-ecp3-config.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c index 0a1565e63c71..7ffdb589841e 100644 --- a/drivers/misc/lattice-ecp3-config.c +++ b/drivers/misc/lattice-ecp3-config.c @@ -15,6 +15,7 @@ #include <linux/spi/spi.h> #include <linux/platform_device.h> #include <linux/delay.h> +#include <asm/unaligned.h> #define FIRMWARE_NAME "lattice-ecp3.bit" @@ -91,8 +92,8 @@ static void firmware_load(const struct firmware *fw, void *context) /* Trying to speak with the FPGA via SPI... */ txbuf[0] = FPGA_CMD_READ_ID; ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); - dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", *(u32 *)&rxbuf[4]); - jedec_id = *(u32 *)&rxbuf[4]; + jedec_id = get_unaligned_be32(&rxbuf[4]); + dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", jedec_id); for (i = 0; i < ARRAY_SIZE(ecp3_dev); i++) { if (jedec_id == ecp3_dev[i].jedec_id) @@ -109,7 +110,8 @@ static void firmware_load(const struct firmware *fw, void *context) txbuf[0] = FPGA_CMD_READ_STATUS; ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); - dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]); + status = get_unaligned_be32(&rxbuf[4]); + dev_dbg(&spi->dev, "FPGA Status=%08x\n", status); buffer = kzalloc(fw->size + 8, GFP_KERNEL); if (!buffer) { @@ -141,7 +143,7 @@ static void firmware_load(const struct firmware *fw, void *context) for (i = 0; i < FPGA_CLEAR_LOOP_COUNT; i++) { txbuf[0] = FPGA_CMD_READ_STATUS; ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); - status = *(u32 *)&rxbuf[4]; + status = get_unaligned_be32(&rxbuf[4]); if (status == FPGA_STATUS_CLEARED) break; @@ -164,8 +166,8 @@ static void firmware_load(const struct firmware *fw, void *context) txbuf[0] = FPGA_CMD_READ_STATUS; ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); - dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]); - status = *(u32 *)&rxbuf[4]; + status = get_unaligned_be32(&rxbuf[4]); + dev_dbg(&spi->dev, "FPGA Status=%08x\n", status); /* Check result */ if (status & FPGA_STATUS_DONE) @@ -196,7 +198,7 @@ static int lattice_ecp3_probe(struct spi_device *spi) spi_set_drvdata(spi, data); init_completion(&data->fw_loaded); - err = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, + err = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG, FIRMWARE_NAME, &spi->dev, GFP_KERNEL, spi, firmware_load); if (err) { |