On Dec 28 2007 14:01, [email protected] wrote:
>+
>+ * The initial minor number is 128 to prevent clashes with ttyS:
>+ * mknod /dev/ttyMAX0 c 4 128
>+ */
[4:128] is taken by ttyS64. Please look into Documentation/devices.txt.
>+struct max3100_port_s {
>+ struct uart_port port;
>+ struct spi_device *spi;
>+ struct tty_struct *tty;
>+
>+ struct mutex spi_txrx;/* protects access to the hw */
>+
>+ int rts; /* rts status, can be MAX3100_RTS or 0 */
possibly be bool then, if it only takes on two values?
>+ int conf; /* configuration for the MAX31000
>+ * (bits 0-7, bits 8-11 are irqs) */
>+ int last_cts_rx; /* last CTS received for flow ctrl */
>+
>+ int tx_buf_cur; /* current char to tx */
>+ int tx_buf_tot; /* current number of chars in tx buf */
Probably unsigned?
>+static int max3100_do_parity(struct max3100_port_s *s, u16 c)
>+{
>+ int parity;
>+ int i, n;
>+
>+ if (s->parity & MAX3100_PARITY_ODD)
>+ parity = 0;
>+ else
>+ parity = 1;
Or
parity = !!(s->parity & MAX3100_PARITY_ODD);
n = (s->parity & MAX3100_7BIT) ? 7 : 8;
(up to you)
>+ for (i = 0; i < n; i++)
>+ parity = parity ^ ((c>>i) & 1);
parity ^= (c >> i) & 1;
>+ return parity;
>+}
>+
>+ if (s->loopback) {
>+ if ((tx & MAX3100_CMD) == MAX3100_RC)
>+ tx |= 1;
>+ }
if (s->loopback && (tx & MAX3100_CMD) == MAX3100_RC)
tx |= 1;
>+MODULE_DESCRIPTION("MAX3100 driver");
>+MODULE_LICENSE("GPL");
I notice a steep increase in serial drivers. Everyone got their
new chips for xmas, eh? :)
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