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rockchip/spi: Allow SPI buses > 2 

If SPI_BASEx is defined (for 2 < x <= 5), allow selecting it.
Since the bus number translates into an offset into an array, require
that all earlier buses are defined, too.

Also assert() that the array is properly sized instead of blindly
exceeding its bounds when called with a too big bus number.

TEST=initializing bus 5 doesn't trap anymore on kevin
BRANCH=none
BUG=none

Change-Id: I69f8ebe10854976608197a13d223ee8a555a9545
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: c4af2a4ad4d6eea551653ca300ea6d04f1280919
Original-Change-Id: I27724d64d822ed0ec824a69ed611140bfbe08f5a
Original-Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Original-Reviewed-on: https://chromium-review.googlesource.com/341034
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14723
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2016-04-28 08:02:14 +02:00 committed by Patrick Georgi
parent 93649b122e
commit 50afb0631f
1 changed files with 30 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
src/soc/rockchip/common/spi.c
View File

@ -35,7 +35,7 @@ struct rockchip_spi_slave {
#define SPI_SRCCLK_HZ (99*MHz)
#define SPI_FIFO_DEPTH 32
static struct rockchip_spi_slave rockchip_spi_slaves[3] = {
static struct rockchip_spi_slave rockchip_spi_slaves[] = {
{
.slave = {
.bus = 0,
@ -54,7 +54,33 @@ static struct rockchip_spi_slave rockchip_spi_slaves[3] = {
},
.regs = (void *)SPI2_BASE,
},
#ifdef SPI3_BASE
{
.slave = {
.bus = 3,
.rw = SPI_READ_FLAG | SPI_WRITE_FLAG,
},
.regs = (void *)SPI3_BASE,
},
#ifdef SPI4_BASE
{
.slave = {
.bus = 4,
.rw = SPI_READ_FLAG | SPI_WRITE_FLAG,
},
.regs = (void *)SPI4_BASE,
},
#ifdef SPI5_BASE
{
.slave = {
.bus = 5,
.rw = SPI_READ_FLAG | SPI_WRITE_FLAG,
},
.regs = (void *)SPI5_BASE,
},
#endif
#endif
#endif
};
static struct rockchip_spi_slave *to_rockchip_spi(struct spi_slave *slave)
@ -64,7 +90,7 @@ static struct rockchip_spi_slave *to_rockchip_spi(struct spi_slave *slave)
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs)
{
assert(bus >= 0 && bus < 3);
assert(bus >= 0 && bus < ARRAY_SIZE(rockchip_spi_slaves));
return &(rockchip_spi_slaves[bus].slave);
}
@ -97,6 +123,7 @@ static void rockchip_spi_set_clk(struct rockchip_spi *regs, unsigned int hz)
void rockchip_spi_init(unsigned int bus, unsigned int speed_hz)
{
assert(bus >= 0 && bus < ARRAY_SIZE(rockchip_spi_slaves));
struct rockchip_spi *regs = rockchip_spi_slaves[bus].regs;
unsigned int ctrlr0 = 0;