tty: amba-pl011: add support for ZTE UART (EXPERIMENTAL)

Add (incomplete) support for the ZTE UART to the AMBA PL011 driver.
This is similar to the ARM and ST variants, except it has a different
register address layout, and requires 32-bit accesses to the registers.
Use the newly introduced register tables and access size support to
cope with these differences.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index c8165b61dbf8..295f0be128f9 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -171,6 +171,29 @@ static struct vendor_data vendor_st = {
         .get_fifosize           = get_fifosize_st,
 };
 
+static const u16 pl011_zte_offsets[REG_ARRAY_SIZE] = {
+        [REG_DR] = ZX_UART011_DR,
+        [REG_FR] = ZX_UART011_FR,
+        [REG_LCRH_RX] = ZX_UART011_LCRH,
+        [REG_LCRH_TX] = ZX_UART011_LCRH,
+        [REG_IBRD] = ZX_UART011_IBRD,
+        [REG_FBRD] = ZX_UART011_FBRD,
+        [REG_CR] = ZX_UART011_CR,
+        [REG_IFLS] = ZX_UART011_IFLS,
+        [REG_IMSC] = ZX_UART011_IMSC,
+        [REG_RIS] = ZX_UART011_RIS,
+        [REG_MIS] = ZX_UART011_MIS,
+        [REG_ICR] = ZX_UART011_ICR,
+        [REG_DMACR] = ZX_UART011_DMACR,
+};
+
+static struct vendor_data vendor_zte = {
+        .reg_offset             = pl011_zte_offsets,
+        .access_32b             = true,
+        .ifls                   = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8,
+        .get_fifosize           = get_fifosize_arm,
+};
+
 /* Deals with DMA transactions */
 
 struct pl011_sgbuf {