On Fri, 10 Feb 2023, Biju Das wrote:
> RZ/V2M specific register handling for the below restriction mentioned in
> hardware manual
>
> 40.6.1 Point for Caution when Changing the Register Settings:
>
> When changing the settings of the following registers, a PRESETn master
> reset or FIFO reset + SW reset (FCR[2],FCR[1], HCR0[7]) must be input to
> re-initialize them.
>
> Target Registers: FCR, LCR, MCR, DLL, DLM, HCR0.
This information should appear in the changelog of 3/3!
--
i.
> v2->v3:
> * Dropped sclk from priv.
> * Dropped unneeded clk_disable_unprepare from remove().
> * Retained Rb tags from Geert,Andy and Ilpo as the changes are trivial.
> * Replaced of_device_get_match_data()->device_get_match_data().
> * Replaced of_device.h->property.h
> * Dropped struct serial8250_em_hw_info *info from priv and started
> using a local variable info in probe().
> * Retained Rb tag from Ilpo as changes are trivial.
> * Replaced readl/writel()->serial8250_em_serial_in/out() in serial8250_rzv2m_
> reg_update() to avoid duplication of offset trickery.
> * Added support for HCR0 read/write in serial8250_em_{serial_in, serial_out}
> * Added UART_LCR macro support in serial8250_em_serial_in() to read LCR
> * Reordered serial8250_em_{serial_in, serial_out} above serial8250_rzv2m_
> reg_update().
> * Replaced priv->info->serial_out to info->serial_out.
> v1->v2:
> * Dropped patch#1 from previous series
> * Replaced devm_clk_get->devm_clk_get_enabled() and updated clk
> handling in probe().
> * Added Rb tag from Geert.
> * Added patch for updating Renesas RZ/V2M UART type from 16550a->16750
> and also enables 64-bytes fifo.
> * Used .data for taking h/w differences between EMMA mobile and RZ/V2M UART.
> * Added serial_out() to struct serial8250_em_hw_info for the write register
> differences between EMMA mobile and RZ/V2M UART.
> Biju Das (3):
> serial: 8250_em: Use dev_err_probe()
> serial: 8250_em: Update RZ/V2M port type as PORT_16750
> serial: 8250_em: Add serial_out() to struct serial8250_em_hw_info
>
> drivers/tty/serial/8250/8250_em.c | 128 ++++++++++++++++++++++++------
> 1 file changed, 102 insertions(+), 26 deletions(-)
>
>
