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authorPhilippe Langlais <philippe.langlais@linaro.org>2011-03-23 13:05:16 +0300
committerGrant Likely <grant.likely@secretlab.ca>2011-03-24 06:27:35 +0300
commit06fb01fd1dc624d891cbe039a88a44bc8a8a9ec1 (patch)
treee9e198d3281cac335d2e3bfc47069ffc1e66fe14 /drivers
parent95c5c3ab7db0dcaeebeb771b90152cd47aa27243 (diff)
downloadlinux-06fb01fd1dc624d891cbe039a88a44bc8a8a9ec1.tar.xz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/spi/amba-pl022.c20
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 },
};