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| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2015-01-26 07:30:25 +0000 |
|---|---|---|
| committer | Andrey Konovalov <andrey.konovalov@linaro.org> | 2015-02-16 14:36:17 +0300 |
| commit | cd5bc0162d06be5efbbaf00dec44cf509659b071 (patch) | |
| tree | af7c4fa76ab55618b101e3788152bc8ca43721bd | |
| parent | 17c271fd7e1a3587b7a6d6b77395fdee1627f089 (diff) | |
| download | linux-linaro-tracking-cd5bc0162d06be5efbbaf00dec44cf509659b071.tar.gz | |
WIP: mfd: syscon: Add register stride to DT bindings.
This patch adds register stride to dt bindings so that the consumers of
the syscon could change it to there need. One of the the use case for
this feature is Qualcomm qfprom which needs a byte access to regmap
returned from syscon.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/syscon.txt | 3 | ||||
| -rw-r--r-- | drivers/mfd/syscon.c | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/syscon.txt b/Documentation/devicetree/bindings/mfd/syscon.txt index fe8150bb3248..7f06ec1ff591 100644 --- a/Documentation/devicetree/bindings/mfd/syscon.txt +++ b/Documentation/devicetree/bindings/mfd/syscon.txt @@ -13,6 +13,9 @@ Required properties: - compatible: Should contain "syscon". - reg: the register region can be accessed from syscon +Optional properties: +- stride : register address stride in bytes. + Examples: gpr: iomuxc-gpr@020e0000 { compatible = "fsl,imx6q-iomuxc-gpr", "syscon"; diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index 176bf0fa2685..98769d554f1c 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -48,6 +48,7 @@ static struct syscon *of_syscon_register(struct device_node *np) struct regmap *regmap; void __iomem *base; int ret; + u32 stride; struct regmap_config syscon_config = syscon_regmap_config; if (!of_device_is_compatible(np, "syscon")) @@ -69,6 +70,14 @@ static struct syscon *of_syscon_register(struct device_node *np) else if (of_property_read_bool(np, "little-endian")) syscon_config.val_format_endian = REGMAP_ENDIAN_LITTLE; + if (!of_property_read_u32(np, "stride", &stride)) { + if (stride > 4) + stride = 4; + + syscon_config.reg_stride = stride; + syscon_config.val_bits = 8 * stride; + } + regmap = regmap_init_mmio(NULL, base, &syscon_config); if (IS_ERR(regmap)) { pr_err("regmap init failed\n"); |