kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

serial: 8250: Add new port type for TI DA8xx/66AK2x

Browse source 
This adds a new UART port type for TI DA8xx/OMAPL13x/AM17xx/AM18xx/66AK2x.
These SoCs have standard 8250 registers plus some extra non-standard
registers.

The UART will not function unless the non-standard Power and Emulation
Management Register (PWREMU_MGMT) is configured correctly. This is
currently handled in arch/arm/mach-davinci/serial.c for non-device-tree
boards. Making this part of the UART driver will allow UART to work on
device-tree boards as well and the mach code can eventually be removed.

Signed-off-by: David Lechner <david@lechnology.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Lechner 2017-01-05 12:54:18 -06:00 • committed by Greg Kroah-Hartman
parent b2ae93e058
commit a2d6a987bf
4 changed files with 33 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/uapi/linux/serial_core.h
View file

@ -56,7 +56,8 @@
#define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
#define PORT_RT2880 29 /* Ralink RT2880 internal UART */
#define PORT_16550A_FSL64 30 /* Freescale 16550 UART with 64 FIFOs */
#define PORT_MAX_8250 30 /* max port ID */
#define PORT_DA830 31 /* TI DA8xx/66AK2x */
#define PORT_MAX_8250 31 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed

8
include/uapi/linux/serial_reg.h
View file

@ -327,6 +327,14 @@
#define SERIAL_RSA_BAUD_BASE (921600)
#define SERIAL_RSA_BAUD_BASE_LO (SERIAL_RSA_BAUD_BASE / 8)
/* Extra registers for TI DA8xx/66AK2x */
#define UART_DA830_PWREMU_MGMT 12
/* PWREMU_MGMT register bits */
#define UART_DA830_PWREMU_MGMT_FREE (1 << 0) /* Free-running mode */
#define UART_DA830_PWREMU_MGMT_URRST (1 << 13) /* Receiver reset/enable */
#define UART_DA830_PWREMU_MGMT_UTRST (1 << 14) /* Transmitter reset/enable */
/*
* Extra serial register definitions for the internal UARTs
* in TI OMAP processors.