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da7fa058a3
linux/drivers/tty/serial/8250
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Masahiro Yamada da7fa058a3 serial: 8250_uniphier: avoid locking for FCR register write 
The hardware book says, the FCR is combined with a register called
CHAR (it will trigger interrupt when a specific character is
received).  At first, I used lock/read/modify/write/unlock dance for
the FCR to not affect the upper bits, but the CHAR is actually never
used.  It should not hurt to always clear the CHAR and to handle the
FCR as a normal case.  It can save the costly locking.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-10 14:30:09 +01:00
..
8250_accent.c tty: serial: 8250: Add generic port init macro 2016-02-06 23:15:53 -08:00
8250_acorn.c tty: serial: 8250: Fix whitespace errors 2016-02-06 23:15:53 -08:00
8250_bcm2835aux.c serial: bcm2835: fix unsigned int issue with irq 2016-02-14 17:39:36 -08:00
8250_boca.c tty: serial: 8250: Add generic port init macro 2016-02-06 23:15:53 -08:00
8250_core.c Merge 4.8-rc5 into tty-next 2016-09-05 08:11:21 +02:00
8250_dma.c serial: 8250_dma: adjust DMA address of the UART 2016-08-31 16:13:29 +02:00
8250_dw.c TTY/Serial patches for 4.9-rc1 2016-10-03 20:11:49 -07:00
8250_early.c serial: 8250_early: Add earlycon support for Synopsys DesignWare ABP UART 2016-06-25 09:12:55 -07:00
8250_em.c serial: 8250: remove the redundant include 2015-03-26 22:21:08 +01:00
8250_exar_st16c554.c tty: serial: 8250: Add generic port init macro 2016-02-06 23:15:53 -08:00
8250_fintek.c serial: 8250_fintek: Add F81865 Support 2016-10-27 16:28:17 +02:00
8250_fourport.c tty: serial: 8250: Add generic port init macro 2016-02-06 23:15:53 -08:00
8250_fsl.c serial: export fsl8250_handle_irq 2015-11-20 16:19:54 -08:00
8250_gsc.c tty: serial: 8250: Suitably replace printk 2016-02-06 23:15:53 -08:00
8250_hp300.c tty: serial: 8250: Suitably replace printk 2016-02-06 23:15:53 -08:00
8250_hub6.c tty: serial: 8250: Fix whitespace errors 2016-02-06 23:15:53 -08:00
8250_ingenic.c serial: 8250_ingenic: drop #if conditional surrounding earlycon code 2016-06-25 14:31:04 -07:00
8250_lpc18xx.c serial: 8250: add LPC18xx/43xx UART driver 2015-06-01 06:56:33 +09:00
8250_lpss.c Merge 4.9-rc3 into tty-next 2016-10-30 06:42:10 -04:00
8250_mid.c Merge 4.8-rc5 into tty-next 2016-09-05 08:11:21 +02:00
8250_moxa.c tty: serial: 8250: add MOXA Smartio MUE boards support 2016-03-07 16:11:14 -08:00
8250_mtk.c serial: 8250_mtk: support big baud rate. 2016-08-31 16:01:26 +02:00
8250_of.c serial: 8250: pxa: add devicetree earlyconsole 2016-10-27 16:27:24 +02:00
8250_omap.c Revert "tty/serial/8250: use mctrl_gpio helpers" 2016-08-31 15:36:01 +02:00
8250_pci.c serial: 8250_pci: Use symbolic constants for EXAR's MPIO registers 2016-09-22 11:45:08 +02:00
8250_pnp.c tty: serial: 8250: Fix indentation warnings 2016-02-06 23:15:53 -08:00
8250_port.c tty: serial: 8250: 8250_core: NXP SC16C2552 workaround 2016-10-27 16:41:56 +02:00
8250_pxa.c serial: 8250: pxa: add devicetree earlyconsole 2016-10-27 16:27:24 +02:00
8250_uniphier.c serial: 8250_uniphier: avoid locking for FCR register write 2016-11-10 14:30:09 +01:00
8250.h Merge 4.8-rc5 into tty-next 2016-09-05 08:11:21 +02:00
Kconfig serial: rewrite pxa2xx-uart to use 8250_core 2016-10-27 16:03:09 +02:00
Makefile serial: rewrite pxa2xx-uart to use 8250_core 2016-10-27 16:03:09 +02:00
serial_cs.c tty: serial: 8250: Fix multi-line strings 2016-02-06 23:15:53 -08:00