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>

diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c
index 5c2b092a915e2498a4c100daa1d1e8aa3bea0fe6..5a4e0afb9ad6dc39e8a3bb041c72d0b8f21e60f7 100644 (file)
--- 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 },
 };