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regulator: ti-abb-regulator: do not open-code counting and access of dt array elements 

Open coding the counting of elements in a dt-property is abstracted by the newly
introduced of_property_count_uXX_elems functions. Additionally the raw iteration
over the states element exposes the endian conversion and dtb-format details,
which according to Mark Rutland "would be nice to limit [...] to of_ helper
functions".

Thus change ti-abb-regulator to use the helper for element counting and
of_property_read_u32_index for retrieval of individual values.

This makes it possible to remove the raw access to the property entirely.

Signed-off-by: Heiko Stuebner <heiko.stuebner@bqreaders.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Heiko Stuebner 2014-02-12 01:01:42 +01:00 committed by Mark Brown
parent 13cf4ea01a
commit 5c24d355dd
1 changed files with 20 additions and 23 deletions
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43
drivers/regulator/ti-abb-regulator.c
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@ -507,32 +507,24 @@ static int ti_abb_init_table(struct device *dev, struct ti_abb *abb,
struct regulator_init_data *rinit_data)
{
struct ti_abb_info *info;
const struct property *prop;
const __be32 *abb_info;
const u32 num_values = 6;
char *pname = "ti,abb_info";
u32 num_entries, i;
u32 i;
unsigned int *volt_table;
int min_uV = INT_MAX, max_uV = 0;
int num_entries, min_uV = INT_MAX, max_uV = 0;
struct regulation_constraints *c = &rinit_data->constraints;
prop = of_find_property(dev->of_node, pname, NULL);
if (!prop) {
dev_err(dev, "No '%s' property?\n", pname);
return -ENODEV;
}
if (!prop->value) {
dev_err(dev, "Empty '%s' property?\n", pname);
return -ENODATA;
}
/*
* Each abb_info is a set of n-tuple, where n is num_values, consisting
* of voltage and a set of detection logic for ABB information for that
* voltage to apply.
*/
num_entries = prop->length / sizeof(u32);
num_entries = of_property_count_u32_elems(dev->of_node, pname);
if (num_entries < 0) {
dev_err(dev, "No '%s' property?\n", pname);
return -ENODEV;
}
if (!num_entries || (num_entries % num_values)) {
dev_err(dev, "All '%s' list entries need %d vals\n", pname,
num_values);
@ -561,18 +553,23 @@ static int ti_abb_init_table(struct device *dev, struct ti_abb *abb,
/* We do not know where the OPP voltage is at the moment */
abb->current_info_idx = -EINVAL;
abb_info = prop->value;
for (i = 0; i < num_entries; i++, info++, volt_table++) {
u32 efuse_offset, rbb_mask, fbb_mask, vset_mask;
u32 efuse_val;
/* NOTE: num_values should equal to entries picked up here */
*volt_table = be32_to_cpup(abb_info++);
info->opp_sel = be32_to_cpup(abb_info++);
efuse_offset = be32_to_cpup(abb_info++);
rbb_mask = be32_to_cpup(abb_info++);
fbb_mask = be32_to_cpup(abb_info++);
vset_mask = be32_to_cpup(abb_info++);
of_property_read_u32_index(dev->of_node, pname, i * num_values,
volt_table);
of_property_read_u32_index(dev->of_node, pname,
i * num_values + 1, &info->opp_sel);
of_property_read_u32_index(dev->of_node, pname,
i * num_values + 2, &efuse_offset);
of_property_read_u32_index(dev->of_node, pname,
i * num_values + 3, &rbb_mask);
of_property_read_u32_index(dev->of_node, pname,
i * num_values + 4, &fbb_mask);
of_property_read_u32_index(dev->of_node, pname,
i * num_values + 5, &vset_mask);
dev_dbg(dev,
"[%d]v=%d ABB=%d ef=0x%x rbb=0x%x fbb=0x%x vset=0x%x\n",