spi: ich: Add support for get_mmap() method

Add this method so that the memory-mapped location of the SPI flash can
be queried.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index db895a396d3c44535ed72f3a18d8693924543dbf..160ec370fdae5b17da9ccb70a6b43b69a7980b89 100644 (file)
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -611,6 +611,37 @@ static int ich_spi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
        return ret;
 }
 
+static int ich_get_mmap_bus(struct udevice *bus, ulong *map_basep,
+                           uint *map_sizep, uint *offsetp)
+{
+       pci_dev_t spi_bdf;
+
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+       struct pci_child_platdata *pplat = dev_get_parent_platdata(bus);
+
+       spi_bdf = pplat->devfn;
+#else
+       struct ich_spi_platdata *plat = dev_get_platdata(bus);
+
+       /*
+        * We cannot rely on plat->bdf being set up yet since this method can
+        * be called before the device is probed. Use the of-platdata directly
+        * instead.
+        */
+       spi_bdf = pci_ofplat_get_devfn(plat->dtplat.reg[0]);
+#endif
+
+       return fast_spi_get_bios_mmap(spi_bdf, map_basep, map_sizep, offsetp);
+}
+
+static int ich_get_mmap(struct udevice *dev, ulong *map_basep, uint *map_sizep,
+                       uint *offsetp)
+{
+       struct udevice *bus = dev_get_parent(dev);
+
+       return ich_get_mmap_bus(bus, map_basep, map_sizep, offsetp);
+}
+
 static int ich_spi_adjust_size(struct spi_slave *slave, struct spi_mem_op *op)
 {
        unsigned int page_offset;
@@ -835,6 +866,7 @@ static const struct dm_spi_ops ich_spi_ops = {
        .set_speed      = ich_spi_set_speed,
        .set_mode       = ich_spi_set_mode,
        .mem_ops        = &ich_controller_mem_ops,
+       .get_mmap       = ich_get_mmap,
        /*
         * cs_info is not needed, since we require all chip selects to be
         * in the device tree explicitly