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fsi: aspeed: Enable 23-bit addressing

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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.

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>
This commit is contained in:
Eddie James 2020-07-09 14:17:43 -05:00 committed by Joel Stanley
parent 8a1939829f
commit 6e0ef7d2ce
1 changed files with 4 additions and 2 deletions
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6
drivers/fsi/fsi-master-aspeed.c
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@ -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) {