spi/pl022: Add loopback support for the SPI on 5500

Extend the vendor data with a loopback field, and add new
amba-pl022 vendor data for the DB5500 pl023, as the pl023
on db8500 and db5500 vary.

Signed-off-by: Prajadevi H <prajadevi.h@stericsson.com>
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c
index 5c2b092a915e..5a4e0afb9ad6 100644
--- a/drivers/spi/amba-pl022.c
+++ b/drivers/spi/amba-pl022.c
@@ -324,6 +324,7 @@ struct vendor_data {
         bool unidir;
         bool extended_cr;
         bool pl023;
+        bool loopback;
 };
 
 /**
@@ -1983,7 +1984,7 @@ static int pl022_setup(struct spi_device *spi)
 
         SSP_WRITE_BITS(chip->cr0, clk_freq.scr, SSP_CR0_MASK_SCR, 8);
         /* Loopback is available on all versions except PL023 */
-        if (!pl022->vendor->pl023) {
+        if (pl022->vendor->loopback) {
                 if (spi->mode & SPI_LOOP)
                         tmp = LOOPBACK_ENABLED;
                 else
@@ -2233,6 +2234,7 @@ static struct vendor_data vendor_arm = {
         .unidir = false,
         .extended_cr = false,
         .pl023 = false,
+        .loopback = true,
 };
 
 
@@ -2242,6 +2244,7 @@ static struct vendor_data vendor_st = {
         .unidir = false,
         .extended_cr = true,
         .pl023 = false,
+        .loopback = true,
 };
 
 static struct vendor_data vendor_st_pl023 = {
@@ -2250,6 +2253,16 @@ static struct vendor_data vendor_st_pl023 = {
         .unidir = false,
         .extended_cr = true,
         .pl023 = true,
+        .loopback = false,
+};
+
+static struct vendor_data vendor_db5500_pl023 = {
+        .fifodepth = 32,
+        .max_bpw = 32,
+        .unidir = false,
+        .extended_cr = true,
+        .pl023 = true,
+        .loopback = true,
 };
 
 static struct amba_id pl022_ids[] = {
@@ -2283,6 +2296,11 @@ static struct amba_id pl022_ids[] = {
                 .mask   = 0xffffffff,
                 .data   = &vendor_st_pl023,
         },
+        {
+                .id     = 0x10080023,
+                .mask   = 0xffffffff,
+                .data   = &vendor_db5500_pl023,
+        },
         { 0, 0 },
 };