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arm: zynq: Add support for EMIT_WRITE operation

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Add proper support for EMIT_WRITE operation which is write only.
Do not use EMIT_MASKWRITE which is read-modify-write.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2017-11-10 11:03:47 +01:00
parent f29074803c
commit 11ea6f556c
2 changed files with 8 additions and 0 deletions
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2
arch/arm/mach-zynq/include/mach/ps7_init_gpl.h
View File

@ -13,6 +13,7 @@
#define OPCODE_MASKWRITE 0U
#define OPCODE_MASKPOLL 1U
#define OPCODE_MASKDELAY 2U
#define OPCODE_WRITE 3U
#define OPCODE_ADDRESS_MASK (~3U)
/* Sentinel */
@ -21,6 +22,7 @@
#define EMIT_MASKWRITE(addr, mask, val) OPCODE_MASKWRITE | addr, mask, val
#define EMIT_MASKPOLL(addr, mask) OPCODE_MASKPOLL | addr, mask
#define EMIT_MASKDELAY(addr, mask) OPCODE_MASKDELAY | addr, mask
#define EMIT_WRITE(addr, val) OPCODE_WRITE | addr, val
/* Returns codes of ps7_init* */
#define PS7_INIT_SUCCESS (0)

6
arch/arm/mach-zynq/ps7_spl_init.c
View File

@ -108,6 +108,12 @@ int __weak ps7_config(unsigned long *ps7_config_init)
iowrite((ioread(addr) & ~mask) | (val & mask), addr);
break;
case OPCODE_WRITE:
numargs = 2;
val = ptr[1];
iowrite(val, addr);
break;
case OPCODE_MASKPOLL:
numargs = 2;
mask = ptr[1];