[PATCH 5/6] spi/pl022: Add loopback support for the SPI on 5500
Linus Walleij
linus.walleij at stericsson.com
Wed Mar 23 06:05:16 EDT 2011
From: Philippe Langlais <philippe.langlais at linaro.org>
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.
Cc: Grant Likely <grant.likely at secretlab.ca>
Signed-off-by: Prajadevi H <prajadevi.h at stericsson.com>
Signed-off-by: Philippe Langlais <philippe.langlais at linaro.org>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
drivers/spi/amba-pl022.c | 20 +++++++++++++++++++-
1 files changed, 19 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c
index 95e58c7..fe79773 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;
};
/**
@@ -1984,7 +1985,7 @@ 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
@@ -2228,6 +2229,7 @@ static struct vendor_data vendor_arm = {
.unidir = false,
.extended_cr = false,
.pl023 = false,
+ .loopback = true,
};
@@ -2237,6 +2239,7 @@ static struct vendor_data vendor_st = {
.unidir = false,
.extended_cr = true,
.pl023 = false,
+ .loopback = true,
};
static struct vendor_data vendor_st_pl023 = {
@@ -2245,6 +2248,16 @@ 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[] = {
@@ -2278,6 +2291,11 @@ static struct amba_id pl022_ids[] = {
.mask = 0xffffffff,
.data = &vendor_st_pl023,
},
+ {
+ .id = 0x10080023,
+ .mask = 0xffffffff,
+ .data = &vendor_db5500_pl023,
+ },
{ 0, 0 },
};
--
1.7.3.2
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