u-boot.git/drivers/serial, branch v2023.10-rc2

serial: mtk: initial priv data before using

2023-08-03T13:40:49Z

This patch ensures driver private data being fully initialized in _debug_uart_init which is not covered by .priv_auto ops. Signed-off-by: Sam Shih Signed-off-by: Weijie Gao Reviewed-by: Stefan Roese

serial: pl01x: Modify pending callback to test if transmit FIFO is empty

2023-07-11T12:40:04Z

Before this change the FR_TXFF (Transmit FIFO full) bit (5 in HW_UARTDBG_FR) has been used to assess if there is still data pending to be sent via UART. This approach is problematic, as it may happen that serial is in the middle of transmission (so the TX FIFO is NOT full anymore) and this test returns true infinitely. As a result, for example in _serial_flush() DM serial function we are locked in endless while(). The fix here is to test explicitly if the TX FIFO is empty. Signed-off-by: Lukasz Majewski

serial: pl01x: Prepare the driver to support SPL_OF_PLATDATA

2023-07-11T12:40:04Z

This commit prepares the pl01x serial driver to be used with SPL_OF_PLATDATA enabled. Signed-off-by: Lukasz Majewski

serial: pl01x: Change OF_CONTROL to OF_REAL

2023-07-11T12:40:04Z

Before this change, building this driver for SPL with enabled SPL_DM_SERIAL was problematic, as '-Wunused-const-variable=' warning was visible. Now, the code is only considered when u-boot proper is build. Signed-off-by: Lukasz Majewski

serial: stm32: BRR must be set only when usart is disable

2023-06-16T09:29:29Z

To avoid spurious chars, BRR register must only be written when USART is disabled. Signed-off-by: Patrice Chotard Reviewed-by: Patrick Delaunay

serial: stm32: Wait TC bit before performing initialization

2023-06-16T09:29:29Z

In case there is still chars from previous bootstage to transmit, wait for TC (Transmission Complete) bit to be set which ensure that the last data written in the USART_TDR has been transmitted out of the shift register. Signed-off-by: Patrice Chotard Reviewed-by: Patrick Delaunay

serial: meson: fix meson_serial_pending() tx logic

2023-06-07T08:09:20Z

According to the dm_serial_ops documentation, pending() should: > @return number of waiting characters, 0 for none, -ve on error And: > It is acceptable to return 1 if an indeterminant number > of characters is waiting. With the current implementation, we have: * FIFO is full -> pending() returns 0 * FIFO is partially used -> pending() returns 1 * FIFO is empty -> pending() returns 1 This is not the same as what the documentation requires. Moreover, since [1], arm reset now flushes all console devices (including serial) before the cpu gets reset. Because of the flawed logic: => reset # user calls reset flush() is called _serial_flush() is called ops->pending(dev, false) # never returns false # board hangs indefinitely without resetting. Fix it by using AML_UART_TX_EMPTY instead of AML_UART_TX_FULL. [1] commit c5f4cdb8eb60 ("console: Use flush() before panic and reset"), Signed-off-by: Mattijs Korpershoek Acked-by: Neil Armstrong Link: https://lore.kernel.org/r/20230606-fix-meson-serial-pending-v1-1-6a54d4a01f76@baylibre.com Signed-off-by: Neil Armstrong

serial: mxs: Add MXS AUART driver

2023-05-21T14:54:41Z

Add trivial driver for the MXS AUART IP. This is the other UART IP present in i.MX23 and i.MX28, used to drive the non-DUART ports. Signed-off-by: Marek Vasut

x86: Allow locating the UART from ACPI tables

2023-05-11T02:25:29Z

When coreboot does not pass a UART in its sysinfo struct, there is no easy way to find it out. Since coreboot does not actually init the serial device when serial is disabled, it is not possible to make it add this information to the sysinfo table. Add a way to obtain this information from the DBG2 ACPI table, which is normally set up by coreboot. For now this only supports a memory-mapped 16550-style UART. Signed-off-by: Simon Glass Reviewed-by: Bin Meng

Merge tag 'u-boot-rockchip-20230509' of https://source.denx.de/u-boot/custodians/u-boot-rockchip

2023-05-09T16:45:49Z

- Rockchip NFC driver update and dev addr pointer api update; - use standard dr_mode for usb driver; - rock pi boards dts update; - Add rk3566 Anbernic boards; - Misc fixes for drivers;