* [PATCH] fsi: aspeed: Enable 23-bit addressing
@ 2020-07-09 19:17 ` Eddie James
0 siblings, 0 replies; 2+ messages in thread
From: Eddie James @ 2020-07-09 19:17 UTC (permalink / raw)
To: linux-aspeed
In order to access more than the second hub link, 23-bit addressing is
required. The core provides the highest two bits of address as the slave
ID to the master.
OpenBMC-Staging-Count: 1
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
drivers/fsi/fsi-master-aspeed.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index f49742b310c2..b49dccf14315 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -241,9 +241,10 @@ static int aspeed_master_read(struct fsi_master *master, int link,
struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
int ret;
- if (id != 0)
+ if (id > 0x3)
return -EINVAL;
+ addr |= id << 21;
addr += link * FSI_HUB_LINK_SIZE;
switch (size) {
@@ -273,9 +274,10 @@ static int aspeed_master_write(struct fsi_master *master, int link,
struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
int ret;
- if (id != 0)
+ if (id > 0x3)
return -EINVAL;
+ addr |= id << 21;
addr += link * FSI_HUB_LINK_SIZE;
switch (size) {
--
2.24.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] fsi: aspeed: Enable 23-bit addressing
@ 2020-07-09 19:17 ` Eddie James
0 siblings, 0 replies; 2+ messages in thread
From: Eddie James @ 2020-07-09 19:17 UTC (permalink / raw)
To: linux-fsi; +Cc: linux-aspeed, linux-kernel, jk, joel, alistair, eajames, andrew
In order to access more than the second hub link, 23-bit addressing is
required. The core provides the highest two bits of address as the slave
ID to the master.
OpenBMC-Staging-Count: 1
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
drivers/fsi/fsi-master-aspeed.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index f49742b310c2..b49dccf14315 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -241,9 +241,10 @@ static int aspeed_master_read(struct fsi_master *master, int link,
struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
int ret;
- if (id != 0)
+ if (id > 0x3)
return -EINVAL;
+ addr |= id << 21;
addr += link * FSI_HUB_LINK_SIZE;
switch (size) {
@@ -273,9 +274,10 @@ static int aspeed_master_write(struct fsi_master *master, int link,
struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
int ret;
- if (id != 0)
+ if (id > 0x3)
return -EINVAL;
+ addr |= id << 21;
addr += link * FSI_HUB_LINK_SIZE;
switch (size) {
--
2.24.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-07-09 19:18 UTC | newest]
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2020-07-09 19:17 [PATCH] fsi: aspeed: Enable 23-bit addressing Eddie James
2020-07-09 19:17 ` Eddie James
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