[U-Boot] [PATCH 1/4] p101x: extra init for u8500

From: Rabin Vincent rabin.vincent@stericsson.com

empty fifo on init program receive line control register on u8500

Signed-off-by: Rabin Vincent rabin.vincent@stericsson.com --- drivers/serial/serial_pl01x.c | 10 ++++++++++ drivers/serial/serial_pl01x.h | 4 ++++ 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 5dfcde8..22ada8f 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -112,6 +112,12 @@ int serial_init (void) unsigned int remainder; unsigned int fraction;

+ /* Empty RX fifo if necessary */ + if (readl(&regs->pl011_cr) & UART_PL011_CR_UARTEN) { + while (!(readl(&regs->fr) & UART_PL01x_FR_RXFE)) + readl(&regs->dr); + } + /* First, disable everything */ writel(0, &regs->pl011_cr);

@@ -134,6 +140,10 @@ int serial_init (void) writel(UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN, &regs->pl011_lcrh);

+#ifdef CONFIG_U8500 + /* program receive line control register */ + writel(0x70, &regs->pl011_rlcr); +#endif /* Finally, enable the UART */ writel(UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | UART_PL011_CR_RXE, &regs->pl011_cr); diff --git a/drivers/serial/serial_pl01x.h b/drivers/serial/serial_pl01x.h index b670c24..fdd3911 100644 --- a/drivers/serial/serial_pl01x.h +++ b/drivers/serial/serial_pl01x.h @@ -43,7 +43,11 @@ struct pl01x_regs { u32 pl010_lcrl; /* 0x10 Line control register, low byte */ u32 pl010_cr; /* 0x14 Control register */ u32 fr; /* 0x18 Flag register (Read only) */ +#ifdef CONFIG_U8500 + u32 pl011_rlcr; /* 0x1c Receive line control register */ +#else u32 reserved; +#endif u32 ilpr; /* 0x20 IrDA low-power counter register */ u32 pl011_ibrd; /* 0x24 Integer baud rate register */ u32 pl011_fbrd; /* 0x28 Fractional baud rate register */