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u-boot/drivers/serial
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Algapally Santosh Sagar bd9ff681bd serial: zynqmp: Fetch baudrate from dtb and update 
The baudrate configured in .config is taken by default by serial. If
change of baudrate is required then the .config needs to changed and
u-boot recompilation is required or the u-boot environment needs to be
updated.

To avoid this, support is added to fetch the baudrate directly from the
device tree file and update.
The serial, prints the log with the configured baudrate in the dtb.
The commit c4df0f6f31 ("arm: mvebu: Espressobin: Set default value for
$fdtfile env variable") is taken as reference for changing the default
environment variable.

The default environment stores the default baudrate value, When default
baudrate and dtb baudrate are not same glitches are seen on the serial.
So, the environment also needs to be updated with the dtb baudrate to
avoid the glitches on the serial.

Also add test to cover this new function.

Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230921112043.3144726-3-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2023-11-07 13:47:08 +01:00
..
altera_jtag_uart.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
altera_uart.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
arm_dcc.c serial: arm_dcc: Use CONFIG_ARM64 not CONFIG_CPU_ARMV8 2021-12-27 16:20:18 -05:00
atmel_usart.c kbuild: Remove uncmd_spl logic 2022-12-23 10:15:13 -05:00
atmel_usart.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Kconfig serial: zynqmp: Fetch baudrate from dtb and update 2023-11-07 13:47:08 +01:00
Makefile serial: mxs: Add MXS AUART driver 2023-05-21 16:54:41 +02:00
ns16550.c pci: serial: Support reading PCI-register size with base 2023-10-06 14:38:13 -04:00
sandbox.c spl: Allow enabling SPL_OF_REAL and SPL_OF_PLATDATA at the same time 2023-10-17 20:50:52 -04:00
serial-uclass.c serial: zynqmp: Fetch baudrate from dtb and update 2023-11-07 13:47:08 +01:00
serial.c serial: Remove unused NEEDS_MANUAL_RELOC code bits 2023-09-14 10:42:25 -04:00
serial_ar933x.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
serial_arc.c serial: Use -EAGAIN in getc and putc 2023-01-02 16:01:40 -05:00
serial_bcm283x_mu.c Correct SPL uses of OF_BOARD 2023-02-10 07:41:41 -05:00
serial_bcm283x_pl011.c Correct SPL uses of OF_BOARD 2023-02-10 07:41:41 -05:00
serial_bcm6345.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
serial_coreboot.c x86: Allow locating the UART from ACPI tables 2023-05-11 10:25:29 +08:00
serial_cortina.c dm: treewide: Rename ofdata_to_platdata() to of_to_plat() 2020-12-13 16:51:09 -07:00
serial_efi.c efi: serial: Support arrow keys 2021-12-31 06:45:01 +01:00
serial_htif.c serial: Add RISC-V HTIF console driver 2022-02-10 11:18:12 +08:00
serial_intel_mid.c serial: Update NS16550_t and struct NS16550 2021-01-05 12:24:40 -07:00
serial_linflexuart.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
serial_lpuart.c serial: lpuart: Enable IPG clock 2023-10-16 14:02:38 +02:00
serial_mcf.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
serial_meson.c serial: amlogic: Add UART compatible for A1 board 2023-10-18 09:46:01 +02:00
serial_mpc8xx.c serial, mpc8xx: Take parameter RAM relocation into account 2023-05-05 07:26:53 +02:00
serial_msm.c WS cleanup: remove trailing white space 2021-09-30 08:08:56 -04:00
serial_msm_geni.c serial: msm-geni: correct oversampling value based on QUP hardware revision 2023-05-02 14:23:59 -04:00
serial_mt7620.c cyclic: Use schedule() instead of WATCHDOG_RESET() 2022-09-18 10:26:33 +02:00
serial_mtk.c common: Drop linux/printk.h from common header 2023-09-24 09:54:57 -04:00
serial_mvebu_a3700.c serial: Use -EAGAIN in getc and putc 2023-01-02 16:01:40 -05:00
serial_mxc.c serial: mxc: Speed-up character transmission 2023-01-30 23:23:02 +01:00
serial_mxs.c serial: mxs: Add MXS AUART driver 2023-05-21 16:54:41 +02:00
serial_npcm.c serial: npcm: Add support for Nuvoton NPCM SoCs 2022-05-05 09:28:47 -04:00
serial_ns16550.c global: Move remaining CONFIG_SYS_NS16550_* to CFG_SYS_NS16550_* 2022-12-05 16:06:07 -05:00
serial_nulldev.c serial: remove nulldev_serial_input 2022-02-09 12:30:13 -07:00
serial_octeon_bootcmd.c cyclic: Use schedule() instead of WATCHDOG_RESET() 2022-09-18 10:26:33 +02:00
serial_octeon_pcie_console.c cyclic: Use schedule() instead of WATCHDOG_RESET() 2022-09-18 10:26:33 +02:00
serial_omap.c global: Finish CONFIG -> CFG migration 2023-01-20 12:27:24 -05:00
serial_owl.c dm: treewide: Rename ofdata_to_platdata() to of_to_plat() 2020-12-13 16:51:09 -07:00
serial_pic32.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
serial_pl01x.c serial: pl01x: Modify pending callback to test if transmit FIFO is empty 2023-07-11 14:40:04 +02:00
serial_pl01x_internal.h kbuild: Remove uncmd_spl logic 2022-12-23 10:15:13 -05:00
serial_rockchip.c rockchip: serial: rename U_BOOT_DRIVER name to rockchip_uart 2022-04-18 11:25:13 +08:00
serial_s5p.c serial: s5p: Use IS_ENABLED where appropriate 2023-01-27 14:32:55 -05:00
serial_s5p4418_pl011.c arm: s5p4418: dm_serial: add driver source code 2023-01-02 16:06:08 -05:00
serial_sbi.c risc-v: implement DBCN based debug console 2023-09-05 10:53:55 +08:00
serial_semihosting.c serial: smh: Fake tstc 2022-06-06 18:01:21 -04:00
serial_sh.c serial: sh: Drop <common.h> 2023-11-02 11:30:18 +01:00
serial_sh.h serial: sh: Add RZ/G2L SCIF support 2023-10-19 17:03:20 +02:00
serial_sifive.c cyclic: Use schedule() instead of WATCHDOG_RESET() 2022-09-18 10:26:33 +02:00
serial_sti_asc.c WS cleanup: remove trailing empty lines 2021-09-30 08:08:56 -04:00
serial_stm32.c serial: stm32: extend TC timeout 2023-08-16 15:38:23 +02:00
serial_stm32.h serial: stm32: Wait TC bit before performing initialization 2023-06-16 11:29:29 +02:00
serial_uniphier.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
serial_xen.c WS cleanup: remove trailing empty lines 2021-09-30 08:08:56 -04:00
serial_xuartlite.c serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
serial_zynq.c drivers: use dev_read_addr_ptr when cast to pointer 2023-05-06 17:28:18 +08:00
usbtty.c global: Finish CONFIG -> CFG migration 2023-01-20 12:27:24 -05:00
usbtty.h global: Finish CONFIG -> CFG migration 2023-01-20 12:27:24 -05:00