The Renesas RZ/V2M UART compatible with the general-purpose 16750 UART chip.
This patch updates Renesas RZ/V2M UART type from 16550a->16750 and also
enables 64-bytes fifo.
This patch series also simplifies 8250_em_probe() and also updates the
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.
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(-)
--
2.25.1
