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| author | Bin Meng <bin.meng@windriver.com> | 2020-06-22 22:29:43 -0700 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2020-07-24 14:55:49 +0800 |
| commit | 9cdfade85ebeab73ce001e3dfdb8c529bf3cabed (patch) | |
| tree | f76e3dbcc44e87583911c24f1a45cb051a8a7932 | |
| parent | 1ce8182b0f7254d0d01e309341c35bbc1b8c10e4 (diff) | |
| download | u-boot-9cdfade85ebeab73ce001e3dfdb8c529bf3cabed.tar.gz u-boot-9cdfade85ebeab73ce001e3dfdb8c529bf3cabed.tar.xz u-boot-9cdfade85ebeab73ce001e3dfdb8c529bf3cabed.zip | |
sysreset: syscon: Support value property
Per the DT binding, <mask> and <value> property can have either one
or both, and if <value> is missing, <mask> should be used, which is
what current U-Boot sysreset_syscon driver supports.
This adds support to the <value> property to the driver, and <mask>
semantics is updated to really be a mask to the value if both exist.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Pragnesh Patel <pragnesh.patel@sifive.com>
| -rw-r--r-- | drivers/sysreset/sysreset_syscon.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/sysreset/sysreset_syscon.c b/drivers/sysreset/sysreset_syscon.c index caf24823cc..1c47486614 100644 --- a/drivers/sysreset/sysreset_syscon.c +++ b/drivers/sysreset/sysreset_syscon.c @@ -19,6 +19,7 @@ struct syscon_reboot_priv { struct regmap *regmap; unsigned int offset; unsigned int mask; + unsigned int value; }; static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type) @@ -29,7 +30,7 @@ static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type) if (type != driver_data) return -EPROTONOSUPPORT; - regmap_write(priv->regmap, priv->offset, priv->mask); + regmap_update_bits(priv->regmap, priv->offset, priv->mask, priv->value); return -EINPROGRESS; } @@ -42,6 +43,7 @@ int syscon_reboot_probe(struct udevice *dev) { struct syscon_reboot_priv *priv = dev_get_priv(dev); int err; + int mask_err, value_err; priv->regmap = syscon_regmap_lookup_by_phandle(dev, "regmap"); if (IS_ERR(priv->regmap)) { @@ -55,10 +57,20 @@ int syscon_reboot_probe(struct udevice *dev) return -ENOENT; } - err = dev_read_u32(dev, "mask", &priv->mask); - if (err) { - pr_err("unable to find mask\n"); - return -ENOENT; + mask_err = dev_read_u32(dev, "mask", &priv->mask); + value_err = dev_read_u32(dev, "value", &priv->value); + if (mask_err && value_err) { + pr_err("unable to find mask and value\n"); + return -EINVAL; + } + + if (value_err) { + /* support old binding */ + priv->value = priv->mask; + priv->mask = 0xffffffff; + } else if (mask_err) { + /* support value without mask*/ + priv->mask = 0xffffffff; } return 0; |