summaryrefslogtreecommitdiff
path: root/drivers/hwmon/vexpress.c
diff options
context:
space:
mode:
authorPawel Moll <pawel.moll@arm.com>2014-04-30 16:46:29 +0100
committerPawel Moll <pawel.moll@arm.com>2014-05-15 17:02:18 +0100
commit3b9334ac835bb431e2186645230c9f1eb94b5d49 (patch)
tree631e00349363927a6e49c6810332d92295103446 /drivers/hwmon/vexpress.c
parentc6e126de43e7d4abfd6cf796b40589db3a046167 (diff)
mfd: vexpress: Convert custom func API to regmap
Components of the Versatile Express platform (configuration microcontrollers on motherboard and daughterboards in particular) talk to each other over a custom configuration bus. They provide miscellaneous functions (from clock generator control to energy sensors) which are represented as platform devices (and Device Tree nodes). The transactions on the bus can be generated by different "bridges" in the system, some of which are universal for the whole platform (for the price of high transfer latencies), others restricted to a subsystem (but much faster). Until now drivers for such functions were using custom "func" API, which is being replaced in this patch by regmap calls. This required: * a rework (and move to drivers/bus directory, as suggested by Samuel and Arnd) of the config bus core, which is much simpler now and uses device model infrastructure (class) to keep track of the bridges; non-DT case (soon to be retired anyway) is simply covered by a special device registration function * the new config-bus driver also takes over device population, so there is no need for special matching table for of_platform_populate nor "simple-bus" hack in the arm64 model dtsi file (relevant bindings documentation has been updated); this allows all the vexpress devices fit into normal device model, making it possible to remove plenty of early inits and other hacks in the near future * adaptation of the syscfg bridge implementation in the sysreg driver, again making it much simpler; there is a special case of the "energy" function spanning two registers, where they should be both defined in the tree now, but backward compatibility is maintained in the code * modification of the relevant drivers: * hwmon - just a straight-forward API change * power/reset driver - API change * regulator - API change plus error handling simplification * osc clock driver - this one required larger rework in order to turn in into a standard platform driver Signed-off-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Mark Brown <broonie@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/hwmon/vexpress.c')
-rw-r--r--drivers/hwmon/vexpress.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/hwmon/vexpress.c b/drivers/hwmon/vexpress.c
index 8242b75d96c8..611f34c7333d 100644
--- a/drivers/hwmon/vexpress.c
+++ b/drivers/hwmon/vexpress.c
@@ -26,7 +26,7 @@
struct vexpress_hwmon_data {
struct device *hwmon_dev;
- struct vexpress_config_func *func;
+ struct regmap *reg;
const char *name;
};
@@ -53,7 +53,7 @@ static ssize_t vexpress_hwmon_u32_show(struct device *dev,
int err;
u32 value;
- err = vexpress_config_read(data->func, 0, &value);
+ err = regmap_read(data->reg, 0, &value);
if (err)
return err;
@@ -68,11 +68,11 @@ static ssize_t vexpress_hwmon_u64_show(struct device *dev,
int err;
u32 value_hi, value_lo;
- err = vexpress_config_read(data->func, 0, &value_lo);
+ err = regmap_read(data->reg, 0, &value_lo);
if (err)
return err;
- err = vexpress_config_read(data->func, 1, &value_hi);
+ err = regmap_read(data->reg, 1, &value_hi);
if (err)
return err;
@@ -234,9 +234,9 @@ static int vexpress_hwmon_probe(struct platform_device *pdev)
type = match->data;
data->name = type->name;
- data->func = vexpress_config_func_get_by_dev(&pdev->dev);
- if (!data->func)
- return -ENODEV;
+ data->reg = devm_regmap_init_vexpress_config(&pdev->dev);
+ if (IS_ERR(data->reg))
+ return PTR_ERR(data->reg);
err = sysfs_create_groups(&pdev->dev.kobj, type->attr_groups);
if (err)
@@ -252,7 +252,6 @@ static int vexpress_hwmon_probe(struct platform_device *pdev)
error:
sysfs_remove_group(&pdev->dev.kobj, match->data);
- vexpress_config_func_put(data->func);
return err;
}
@@ -266,8 +265,6 @@ static int vexpress_hwmon_remove(struct platform_device *pdev)
match = of_match_device(vexpress_hwmon_of_match, &pdev->dev);
sysfs_remove_group(&pdev->dev.kobj, match->data);
- vexpress_config_func_put(data->func);
-
return 0;
}