[PATCH v3 0/3] Update Renesas RZ/V2M UART Port type

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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




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