ar71xx: Add kernel 4.9 support

[openwrt/staging/hauke.git] / target / linux / ar71xx / patches-4.9 / 461-spi-ath79-add-fast-flash-read.patch

diff --git a/target/linux/ar71xx/patches-4.9/461-spi-ath79-add-fast-flash-read.patch b/target/linux/ar71xx/patches-4.9/461-spi-ath79-add-fast-flash-read.patch
new file mode 100644 (file)
index 0000000..0dc73a8
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.9/461-spi-ath79-add-fast-flash-read.patch
@@ -0,0 +1,54 @@
+--- 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 +202,33 @@ static u32 ath79_spi_txrx_mode0(struct s
+       return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS);
+ }
+ 
++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;
++
++      if (spi->chip_select || gpio_is_valid(spi->cs_gpio))
++              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 +258,7 @@ 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;
+ 
+       sp->bitbang.master = master;
+       sp->bitbang.chipselect = ath79_spi_chipselect;