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

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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
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3
include/uapi/linux/serial_core.h
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@ -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