diff options
| author | Cédric Le Goater <clg@kaod.org> | 2022-05-09 19:56:11 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-05-16 12:59:18 +0100 |
| commit | 5785eedee42c34cfec496199a80fa8ec9ddcf7fe (patch) | |
| tree | f62ea39098a44c8e8adc55395175a3d8dbcd5f99 /drivers/spi | |
| parent | bb084f94e1bca4a5c4f689d7aa9b410220c1ed71 (diff) | |
| download | linux-5785eedee42c34cfec496199a80fa8ec9ddcf7fe.tar.bz2 | |
spi: aspeed: Workaround AST2500 limitations
It is not possible to configure a full 128MB window for a chip of the
same size on the AST2500 SPI controller. For this case, the maximum
window size is restricted to 120MB for CE0.
Reviewed-by: Joel Stanley <joel@jms.id.au>
Tested-by: Joel Stanley <joel@jms.id.au>
Tested-by: Tao Ren <rentao.bupt@gmail.com>
Tested-by: Jae Hyun Yoo <quic_jaehyoo@quicinc.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Link: https://lore.kernel.org/r/20220509175616.1089346-7-clg@kaod.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-aspeed-smc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c index 0aff42e20b8d..d2b3342c133e 100644 --- a/drivers/spi/spi-aspeed-smc.c +++ b/drivers/spi/spi-aspeed-smc.c @@ -451,6 +451,8 @@ static int aspeed_spi_set_window(struct aspeed_spi *aspi, * - ioremap each window, not strictly necessary since the overall window * is correct. */ +static const struct aspeed_spi_data ast2500_spi_data; + static int aspeed_spi_chip_adjust_window(struct aspeed_spi_chip *chip, u32 local_offset, u32 size) { @@ -459,6 +461,16 @@ static int aspeed_spi_chip_adjust_window(struct aspeed_spi_chip *chip, struct aspeed_spi_window *win = &windows[chip->cs]; int ret; + /* + * Due to an HW issue on the AST2500 SPI controller, the CE0 + * window size should be smaller than the maximum 128MB. + */ + if (aspi->data == &ast2500_spi_data && chip->cs == 0 && size == SZ_128M) { + size = 120 << 20; + dev_info(aspi->dev, "CE%d window resized to %dMB (AST2500 HW quirk)", + chip->cs, size >> 20); + } + aspeed_spi_get_windows(aspi, windows); /* Adjust this chip window */ |