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| author | Simon Glass <sjg@chromium.org> | 2016-07-04 11:58:00 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-07-14 20:40:24 -0600 |
| commit | 04ecf36ba60f41f695095226e53310b4acaebf1e (patch) | |
| tree | 1ff3310987f63694b65d5b7bd99348e8099faf03 | |
| parent | 3b2a29e0971397085c616c89a3a09f2609f50ca4 (diff) | |
| download | u-boot-04ecf36ba60f41f695095226e53310b4acaebf1e.tar.gz u-boot-04ecf36ba60f41f695095226e53310b4acaebf1e.tar.xz u-boot-04ecf36ba60f41f695095226e53310b4acaebf1e.zip | |
dm: syscon: Add support for of-platdata
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>
| -rw-r--r-- | drivers/core/syscon-uclass.c | 13 | ||||
| -rw-r--r-- | include/syscon.h | 11 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/core/syscon-uclass.c b/drivers/core/syscon-uclass.c index e03f46af57..01bd9683a7 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 4593b6e3eb..34842aa470 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 * |