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(+)
diff --git a/drivers/core/syscon-uclass.c b/drivers/core/syscon-uclass.c index e03f46a..01bd968 100644 --- a/drivers/core/syscon-uclass.c +++ b/drivers/core/syscon-uclass.c @@ -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) diff --git a/include/syscon.h b/include/syscon.h index 4593b6e..34842aa 100644 --- a/include/syscon.h +++ b/include/syscon.h @@ -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 *