[PATCH v4 04/10] powerpc/8xx: Use a larger CPM1 command check mask

Herve Codina
2023-01-26T08:34:54Z

The CPM1 command mask is defined for use with the standard
CPM1 command register as described in the user's manual:
0 |1 3|4 7|8 11|12 14| 15|
RST| - |OPCODE|CH_NUM| - |FLG|

In the QMC extension the CPM1 command register is redefined
(QMC supplement user's manuel) with the following mapping:
0 |1 3|4 7|8 13|14| 15|
RST|QMC OPCODE| 1110|CHANNEL_NUMBER| -|FLG|

Extend the check command mask in order to support both the
standard CH_NUM field and the QMC extension CHANNEL_NUMBER
field.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Acked-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/platforms/8xx/cpm1.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c
index 8ef1f4392086..6b828b9f90d9 100644
--- a/arch/powerpc/platforms/8xx/cpm1.c
+++ b/arch/powerpc/platforms/8xx/cpm1.c
@@ -100,7 +100,7 @@ int cpm_command(u32 command, u8 opcode)
int i, ret;
unsigned long flags;

- if (command & 0xffffff0f)
+ if (command & 0xffffff03)
return -EINVAL;

spin_lock_irqsave(&cmd_lock, flags);
--
2.39.0