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On the raspberry pi, you can disable the serial port to gain dynamic frequency
scaling which can get handy at times.
However, in such a configuration the serial controller gets its rx queue filled
up with zero bytes which then happily get transmitted on to whoever calls
getc() today.
This patch adds detection logic for that case by checking whether the RX pin is
mapped to GPIO15 and disables the mini uart if it is not mapped properly.
That way we can leave the driver enabled in the tree and can determine during
runtime whether serial is usable or not, having a single binary that allows for
uart and non-uart operation.
Signed-off-by: Alexander Graf <[email protected]>
Acked-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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The ethoc device can be configured to have a private memory region
instead of having access to the main memory. In that case egress packets
must be copied into that memory for transmission and pointers to that
memory need to be passed to net_process_received_packet or returned from
the recv callback.
Signed-off-by: Max Filippov <[email protected]>
Acked-by: Joe Hershberger <[email protected]>
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Extract reusable parts from ethoc_init, ethoc_set_mac_address,
ethoc_send and ethoc_receive, move the rest under #ifdef CONFIG_DM_ETH.
Add U_BOOT_DRIVER, eth_ops structure and implement required methods.
Signed-off-by: Max Filippov <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Acked-by: Joe Hershberger <[email protected]>
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The MXC UART IP can be run in DTE or DCE mode. This depends on the
board wiring and the pinmux used and hence is board specific. This
extends platform data with a new field to choose wheather DTE
mode shall be used.
Signed-off-by: Stefan Agner <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Boards can now use DM serial driver, or still legacy mcf uart
driver version.
Signed-off-by: Angelo Dureghello <[email protected]>
Acked-by: Simon Glass <[email protected]>
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The RPi3 typically uses the regular UART for high-speed communication with
the Bluetooth device, leaving us the mini UART to use for the serial
console. Add support for this UART so we can use it.
Signed-off-by: Stephen Warren <[email protected]>
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For Raspberry Pi, we had the input clock rate to the pl011 fixed in
the rpi.c file, but it may be changed by firmware due to user changes
to config.txt. Since the firmware always sets up the uart (default
115200 output unless the user changes it), we can just skip our own
uart init to simplify the boot process and more reliably get serial
output.
Signed-off-by: Eric Anholt <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
Tested-by: Stephen Warren <[email protected]>
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This patch adds support for stm32f7 family usart peripheral.
Signed-off-by: Vikas Manocha <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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The change ports NXP LPC32xx 14-clock UART device driver to driver
model.
Signed-off-by: Vladimir Zapolskiy <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Signed-off-by: Kamil Lulko <[email protected]>
Cc: Simon Glass <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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This driver is enabled only for UniPhier SoCs and ARCH_UNIPHIER now
selects OF_CONTROL and SPL_OF_CONTROL.
This driver no longer needs to support platform data configuration.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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This adds driver model support with this driver. This was tested by Koelsch
board and Gose board.
Signed-off-by: Nobuhiro Iwamatsu <[email protected]>
Acked-by: Simon Glass <[email protected]>
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This commit converts UniPhier on-chip serial driver to driver model.
Since UniPhier SoCs do not have Device Tree support, some board files
should be added under arch/arm/cpu/armv7/uniphier/ph1-*/ directories.
(Device Tree support for UniPhier platform is still under way.)
Now the base address and master clock frequency are passed from
platform data, so CONFIG_SYS_UNIPHIER_SERIAL_BASE* and
CONFIG_SYS_UNIPHIER_UART_CLK should be removed.
Tested on UniPhier PH1-LD4 ref board.
Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Simon Glass <[email protected]>
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The platform_data definitions are generally referenced from both
drivers and board files. That is why header files defining
platform_data sturectures are placed in "include" directory,
but our top level "include" directory is already too cluttered.
Let's collect platform_data definitions under the directory
"include/dm/platform_data" like Linux gathers ones around under
"include/linux/platform_data".
This commit moves two header files:
include/serial_mxc.h -> include/dm/platform_data/serial_mxc.h
include/serial_pl01x.h -> include/dm/platform_data/serial_pl01x.h
Signed-off-by: Masahiro Yamada <[email protected]>
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