diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-26 11:54:29 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-26 11:54:29 -0700 |
commit | f5dcb68086ba2e033b2af32b0da0c7a7c7872a09 (patch) | |
tree | 89c41089b492f8d8d411185bd7cb07538802e837 /drivers/reset/reset-berlin.c | |
parent | 3d9f96d850e4bbfae24dc9aee03033dd77c81596 (diff) | |
parent | 4af34b572a85c44c55491a10693535a79627c478 (diff) |
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Kevin Hilman:
"Some of these are for drivers/soc, where we're now putting
SoC-specific drivers these days. Some are for other driver subsystems
where we have received acks from the appropriate maintainers.
Some highlights:
- simple-mfd: document DT bindings and misc updates
- migrate mach-berlin to simple-mfd for clock, pinctrl and reset
- memory: support for Tegra132 SoC
- memory: introduce tegra EMC driver for scaling memory frequency
- misc. updates for ARM CCI and CCN busses"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits)
drivers: soc: sunxi: Introduce SoC driver to map SRAMs
arm-cci: Add aliases for PMU events
arm-cci: Add CCI-500 PMU support
arm-cci: Sanitise CCI400 PMU driver specific code
arm-cci: Abstract handling for CCI events
arm-cci: Abstract out the PMU counter details
arm-cci: Cleanup PMU driver code
arm-cci: Do not enable CCI-400 PMU by default
firmware: qcom: scm: Add HDCP Support
ARM: berlin: add an ADC node for the BG2Q
ARM: berlin: remove useless chip and system ctrl compatibles
clk: berlin: drop direct of_iomap of nodes reg property
ARM: berlin: move BG2Q clock node
ARM: berlin: move BG2CD clock node
ARM: berlin: move BG2 clock node
clk: berlin: prepare simple-mfd conversion
pinctrl: berlin: drop SoC stub provided regmap
ARM: berlin: move pinctrl to simple-mfd nodes
pinctrl: berlin: prepare to use regmap provided by syscon
reset: berlin: drop arch_initcall initialization
...
Diffstat (limited to 'drivers/reset/reset-berlin.c')
-rw-r--r-- | drivers/reset/reset-berlin.c | 74 |
1 files changed, 28 insertions, 46 deletions
diff --git a/drivers/reset/reset-berlin.c b/drivers/reset/reset-berlin.c index f8b48a13cf0b..3c922d37255c 100644 --- a/drivers/reset/reset-berlin.c +++ b/drivers/reset/reset-berlin.c @@ -11,10 +11,12 @@ #include <linux/delay.h> #include <linux/io.h> +#include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/reset-controller.h> #include <linux/slab.h> #include <linux/types.h> @@ -25,8 +27,7 @@ container_of((p), struct berlin_reset_priv, rcdev) struct berlin_reset_priv { - void __iomem *base; - unsigned int size; + struct regmap *regmap; struct reset_controller_dev rcdev; }; @@ -37,7 +38,7 @@ static int berlin_reset_reset(struct reset_controller_dev *rcdev, int offset = id >> 8; int mask = BIT(id & 0x1f); - writel(mask, priv->base + offset); + regmap_write(priv->regmap, offset, mask); /* let the reset be effective */ udelay(10); @@ -52,7 +53,6 @@ static struct reset_control_ops berlin_reset_ops = { static int berlin_reset_xlate(struct reset_controller_dev *rcdev, const struct of_phandle_args *reset_spec) { - struct berlin_reset_priv *priv = to_berlin_reset_priv(rcdev); unsigned offset, bit; if (WARN_ON(reset_spec->args_count != rcdev->of_reset_n_cells)) @@ -61,71 +61,53 @@ static int berlin_reset_xlate(struct reset_controller_dev *rcdev, offset = reset_spec->args[0]; bit = reset_spec->args[1]; - if (offset >= priv->size) - return -EINVAL; - if (bit >= BERLIN_MAX_RESETS) return -EINVAL; return (offset << 8) | bit; } -static int __berlin_reset_init(struct device_node *np) +static int berlin2_reset_probe(struct platform_device *pdev) { + struct device_node *parent_np = of_get_parent(pdev->dev.of_node); struct berlin_reset_priv *priv; - struct resource res; - resource_size_t size; - int ret; - priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - ret = of_address_to_resource(np, 0, &res); - if (ret) - goto err; - - size = resource_size(&res); - priv->base = ioremap(res.start, size); - if (!priv->base) { - ret = -ENOMEM; - goto err; - } - priv->size = size; + priv->regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); priv->rcdev.owner = THIS_MODULE; priv->rcdev.ops = &berlin_reset_ops; - priv->rcdev.of_node = np; + priv->rcdev.of_node = pdev->dev.of_node; priv->rcdev.of_reset_n_cells = 2; priv->rcdev.of_xlate = berlin_reset_xlate; reset_controller_register(&priv->rcdev); return 0; - -err: - kfree(priv); - return ret; } -static const struct of_device_id berlin_reset_of_match[] __initconst = { - { .compatible = "marvell,berlin2-chip-ctrl" }, - { .compatible = "marvell,berlin2cd-chip-ctrl" }, - { .compatible = "marvell,berlin2q-chip-ctrl" }, +static const struct of_device_id berlin_reset_dt_match[] = { + { .compatible = "marvell,berlin2-reset" }, { }, }; +MODULE_DEVICE_TABLE(of, berlin_reset_dt_match); + +static struct platform_driver berlin_reset_driver = { + .probe = berlin2_reset_probe, + .driver = { + .name = "berlin2-reset", + .of_match_table = berlin_reset_dt_match, + }, +}; +module_platform_driver(berlin_reset_driver); -static int __init berlin_reset_init(void) -{ - struct device_node *np; - int ret; - - for_each_matching_node(np, berlin_reset_of_match) { - ret = __berlin_reset_init(np); - if (ret) - return ret; - } - - return 0; -} -arch_initcall(berlin_reset_init); +MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); +MODULE_AUTHOR("Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>"); +MODULE_DESCRIPTION("Marvell Berlin reset driver"); +MODULE_LICENSE("GPL"); |