From 2426fbc77faef57c80a573303af6543531e2efa3 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Fri, 8 Jul 2016 17:00:41 +0800 Subject: tty: amba-pl011: probe ZTE device from AMBA bus with a pseudo-ID There is no Peripheral Identification Registers on ZTE PL011 device, so although the driver amba-pl011 is ready to work for ZTE device, the device cannot be probed by the driver at all. With arm,primecell-periphid DT bindings (bindings/arm/primecell.txt) in place, it should be the cleanest the way to use a pseudo-ID to probe the device from AMBA bus. We create an unofficial vendor number AMBA_VENDOR_LINUX, which will practically never become an official vendor ID, and takes Configuration, Revision number, and Part number as input to compose a pseudo-ID for ZTE device. Also, since we start using vendor_zte to probe ZTE device, the __maybe_unused for vendor_zte is removed. Signed-off-by: Russell King Signed-off-by: Shawn Guo Signed-off-by: Greg Kroah-Hartman --- include/linux/amba/bus.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 3d8dcdd..d143c13 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -53,8 +53,14 @@ enum amba_vendor { AMBA_VENDOR_ST = 0x80, AMBA_VENDOR_QCOM = 0x51, AMBA_VENDOR_LSI = 0xb6, + AMBA_VENDOR_LINUX = 0xfe, /* This value is not official */ }; +/* This is used to generate pseudo-ID for AMBA device */ +#define AMBA_LINUX_ID(conf, rev, part) \ + (((conf) & 0xff) << 24 | ((rev) & 0xf) << 20 | \ + AMBA_VENDOR_LINUX << 12 | ((part) & 0xfff)) + extern struct bus_type amba_bustype; #define to_amba_device(d) container_of(d, struct amba_device, dev) -- cgit v1.1