@@ -29,7 +29,20 @@ static int syscon_pre_probe(struct udevice *dev)
{
struct syscon_uc_info *priv = dev_get_uclass_priv(dev);
+ /*
+ * With OF_PLATDATA we really have no way of knowing the format of
+ * the device-specific platform data. So we assume that it starts with
+ * a 'reg' member, and this holds a single address and size. Drivers
+ * using OF_PLATDATA will need to ensure that this is true.
+ */
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct syscon_base_platdata *plat = dev_get_platdata(dev);
+
+ return regmap_init_mem_platdata(dev, plat->reg, ARRAY_SIZE(plat->reg),
+ &priv->regmap);
+#else
return regmap_init_mem(dev, &priv->regmap);
+#endif
}
int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp)
@@ -23,6 +23,17 @@ struct syscon_ops {
#define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops)
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+/*
+ * We don't support 64-bit machines. If they are so resource-contrained that
+ * they need to use OF_PLATDATA, something is horribly wrong with the
+ * education of our hardware engineers.
+ */
+struct syscon_base_platdata {
+ u32 reg[2];
+};
+#endif
+
/**
* syscon_get_regmap() - Get access to a register map
*
Provide a new function which can cope with obtaining information from of-platdata instead of the device tree. Signed-off-by: Simon Glass <sjg@chromium.org> --- Changes in v2: - Add a comment to the effect that 64-bit machines are not supported drivers/core/syscon-uclass.c | 13 +++++++++++++ include/syscon.h | 11 +++++++++++ 2 files changed, 24 insertions(+)