Hi
I want to use qspi feature of the ls1028 processer. I change the dts as below:
dts:
spi@20c0000 {
compatible = "nxp,lx2160a-fspi";
#address-cells = <0x01>;
#size-cells = <0x00>;
reg = <0x00 0x20c0000 0x00 0x10000 0x00 0x20000000 0x00 0x10000000>;
reg-names = "fspi_base\0fspi_mmap";
interrupts = <0x00 0x19 0x04>;
clocks = <0x02 0x02 0x00 0x02 0x02 0x00>;
clock-names = "fspi_en\0fspi";
status = "okay";
phandle = <0x30>;
qspidevice@0 {
compatible = "nxp,qspi-generic";
#address-cells = <0x01>;
#size-cells = <0x01>;
spi-max-frequency = <0x1312d00>;
reg = <0x00>;
spi-rx-bus-width = <0x04>;
spi-tx-bus-width = <0x01>;
phandle = <0x31>;
};
/*
flash@0 {
compatible = "spansion,m25p80";
#address-cells = <0x01>;
#size-cells = <0x01>;
m25p,fast-read;
spi-max-frequency = <0x1312d00>;
reg = <0x00>;
spi-rx-bus-width = <0x04>;
spi-tx-bus-width = <0x01>;
phandle = <0x31>;
};
*/
};
Can I use "spi_sync" API to wirte the qspi device driver code as fallow? if not , which api should be called?
some driver code:
static ssize_t qspi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
struct qspi_dev *qspi = file->private_data;
char write_buf[256];
size_t len = min(count, sizeof(write_buf));
struct spi_transfer xfer;
struct spi_message msg;
int ret;
if (copy_from_user(write_buf, buf, len)) {
dev_err(qspi->dev, "Failed to copy data from user space\n");
return -EFAULT;
}
printk(KERN_INFO " write_buf: %s\n",write_buf);
dump_spi_device(qspi->spi);
memset(&xfer, 0, sizeof(xfer));
xfer.tx_buf = write_buf;
xfer.rx_buf = NULL;
xfer.len = len;
//xfer.cs_change = 1;
//xfer.bits_per_word = qspi->spi->bits_per_word;
//xfer.speed_hz = qspi->spi->max_speed_hz;
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(qspi->spi, &msg);
if (ret < 0) {
dev_err(qspi->dev, "Failed to write to QSPI, error code: %d\n", ret);
//dev_err(qspi->dev, "Message length: %u, Message buffer: %p\n", msg.len, msg.buf);
return ret;
}
Thanks,
zhang
