This patch adds an ability to use pl01x as a debug UART. It must be configured like other types of debug UARTs

Signed-off-by: Sergey Temerkhanov s.temerkhanov@gmail.com Signed-off-by: Radha Mohan Chintakuntla rchintakuntla@cavium.com

Acked-by: Simon Glass sjg@chromium.org

---

Changes in v2: - Broke down into 2 patches - Minor changes to accomodate Kconfig options

drivers/serial/serial_pl01x.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)

diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 3a5c1d0..18c02ab 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -367,3 +367,31 @@ U_BOOT_DRIVER(serial_pl01x) = { };

#endif + +#if defined(CONFIG_DEBUG_UART_PL010) || defined(CONFIG_DEBUG_UART_PL011) + +#include <debug_uart.h> + +void debug_uart_init(void) +{ +#ifndef CONFIG_DEBUG_UART_SKIP_INIT + struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; + enum pl01x_type type = CONFIG_IS_ENABLED(DEBUG_UART_PL011) ? + TYPE_PL011 : TYPE_PL010; + + pl01x_generic_serial_init(regs, type); + pl01x_generic_setbrg(regs, type, + CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE); +#endif +} + +static inline void _debug_uart_putc(int ch) +{ + struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; + + pl01x_putc(regs, ch); +} + +DEBUG_UART_FUNCS + +#endif

This patch adds Kconfig entries to facilitate usage of pl01x as a debug UART.

Signed-off-by: Sergey Temerkhanov s.temerkhanov@gmail.com Signed-off-by: Radha Mohan Chintakuntla rchintakuntla@cavium.com

Acked-by: Simon Glass sjg@chromium.org

---

Changes in v2: - Broke down into 2 patches - Made CONFIG_DEBUG_UART_PL010 and CONFIG_DEBUG_UART_PL011 separate options - Typo fixes

drivers/serial/Kconfig | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index ddb725d..cde565f 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -77,6 +77,22 @@ config DEBUG_UART_S5P will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running.

+config DEBUG_UART_PL010 + bool "pl010" + help + Select this to enable a debug UART using the pl01x driver with the + PL010 UART type. You will need to provide parameters to make this + work. The driver will be available until the real driver model + serial is running. + +config DEBUG_UART_PL011 + bool "pl011" + help + Select this to enable a debug UART using the pl01x driver with the + PL011 UART type. You will need to provide parameters to make this + work. The driver will be available until the real driver model + serial is running. + endchoice

config DEBUG_UART_BASE @@ -109,6 +125,12 @@ config DEBUG_UART_SHIFT value. Use this value to specify the shift to use, where 0=byte registers, 2=32-bit word registers, etc.

+config DEBUG_UART_SKIP_INIT + bool "Skip UART initialization" + help + Select this if the UART you want to use for debug output is already + initialized by the time U-Boot starts its execution. + config ROCKCHIP_SERIAL bool "Rockchip on-chip UART support" depends on ARCH_ROCKCHIP && DM_SERIAL