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| author | John Crispin <john@phrozen.org> | 2018-08-09 15:59:41 +0200 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2018-08-22 08:09:00 +0200 |
| commit | 318e19ba6755105bb6cc19937d8fff26cbd2cc6f (patch) | |
| tree | 2f7c96140932a2770fb767141c7d1e93d29127b0 /target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch | |
| parent | e5f56c07d7fab9a6f2201f4100b593349b8ef67d (diff) | |
| download | upstream-318e19ba6755105bb6cc19937d8fff26cbd2cc6f.tar.gz upstream-318e19ba6755105bb6cc19937d8fff26cbd2cc6f.tar.bz2 upstream-318e19ba6755105bb6cc19937d8fff26cbd2cc6f.zip | |
ar71xx: add v4.14 support
adds v4.14 patches for testing but leaves v4.9 as default for now.
Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch b/target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch new file mode 100644 index 0000000000..5c3583f758 --- /dev/null +++ b/target/linux/ar71xx/patches-4.14/461-spi-ath79-add-fast-flash-read.patch @@ -0,0 +1,60 @@ +--- a/drivers/spi/spi-ath79.c ++++ b/drivers/spi/spi-ath79.c +@@ -102,9 +102,6 @@ static void ath79_spi_enable(struct ath7 + /* save CTRL register */ + sp->reg_ctrl = ath79_spi_rr(sp, AR71XX_SPI_REG_CTRL); + sp->ioc_base = ath79_spi_rr(sp, AR71XX_SPI_REG_IOC); +- +- /* TODO: setup speed? */ +- ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43); + } + + static void ath79_spi_disable(struct ath79_spi *sp) +@@ -205,6 +202,38 @@ static u32 ath79_spi_txrx_mode0(struct s + return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS); + } + ++static bool ath79_spi_flash_read_supported(struct spi_device *spi) ++{ ++ if (spi->chip_select || gpio_is_valid(spi->cs_gpio)) ++ return false; ++ ++ return true; ++} ++ ++static int ath79_spi_read_flash_data(struct spi_device *spi, ++ struct spi_flash_read_message *msg) ++{ ++ struct ath79_spi *sp = ath79_spidev_to_sp(spi); ++ ++ if (msg->addr_width > 3) ++ return -EOPNOTSUPP; ++ ++ /* disable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0); ++ ++ memcpy_fromio(msg->buf, sp->base + msg->from, msg->len); ++ ++ /* enable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO); ++ ++ /* restore IOC register */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); ++ ++ msg->retlen = msg->len; ++ ++ return 0; ++} ++ + static int ath79_spi_probe(struct platform_device *pdev) + { + struct spi_master *master; +@@ -234,6 +263,8 @@ static int ath79_spi_probe(struct platfo + master->num_chipselect = pdata->num_chipselect; + master->cs_gpios = pdata->cs_gpios; + } ++ master->spi_flash_read = ath79_spi_read_flash_data; ++ master->flash_read_supported = ath79_spi_flash_read_supported; + + sp->bitbang.master = master; + sp->bitbang.chipselect = ath79_spi_chipselect; |