kernel/linux.git/drivers/serial/altera_uart.c, branch linux-2.6.35.y

serial: altera_uart: Proper section for altera_uart_remove

2010-06-04T20:37:18+00:00

altera_uart_remove should be in .devexit.text Signed-off-by: Tobias Klauser Signed-off-by: Greg Kroah-Hartman

altera_uart: Simplify altera_uart_console_putc

2010-06-04T20:37:18+00:00

The check for the TRDY flag after writing the character is not needed. Also do a cpu_relax() inside the loop. Pass a struct uart_port to altera_uart_console_putc, so we do not need to get it (and dereference pointers) for every character. Cc: Thomas Chou Signed-off-by: Tobias Klauser Signed-off-by: Greg Kroah-Hartman

altera_uart: Don't take spinlock in already protected functions

2010-06-04T20:37:17+00:00

Don't take the port spinlock in uart functions where the serial core already takes care of locking/unlocking them. The code would actually lock up on architectures where spinlocks are implemented (not the case on nios2 where this driver is primarily used for now, thus this bug didn't trigger). Also protect calling altera_uart_rx_chars/altera_uart_tx_chars in the interrupt handler by the port spinlock. Thanks to Ian Abbott for pointing these issues out. Cc: Ian Abbott Cc: Thomas Chou Signed-off-by: Tobias Klauser Signed-off-by: Greg Kroah-Hartman

serial: Add driver for the Altera UART

2010-05-21T16:34:30+00:00

Add an UART driver for the UART component available as a SOPC (System on Programmable Chip) component for Altera FPGAs. Signed-off-by: Tobias Klauser Signed-off-by: Greg Kroah-Hartman