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rtc: ds1307: Make use of device properties

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Device property API allows to gather device resources from different sources,
such as ACPI. Convert the drivers to unleash the power of device property API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201116142859.31257-2-andriy.shevchenko@linux.intel.com
This commit is contained in:
Andy Shevchenko 2020-11-16 16:28:58 +02:00 committed by Alexandre Belloni
parent a31111189b
commit 227ec129ad
1 changed files with 21 additions and 17 deletions
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38
drivers/rtc/rtc-ds1307.c
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@ -12,7 +12,8 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/property.h>
#include <linux/rtc/ds1307.h>
#include <linux/rtc.h>
#include <linux/slab.h>
@ -30,6 +31,7 @@
* That's a natural job for a factory or repair bench.
*/
enum ds_type {
unknown_ds_type, /* always first and 0 */
ds_1307,
ds_1308,
ds_1337,
@ -1600,13 +1602,16 @@ static const struct clk_ops ds3231_clk_32khz_ops = {
.recalc_rate = ds3231_clk_32khz_recalc_rate,
};
static const char *ds3231_clks_names[] = {
[DS3231_CLK_SQW] = "ds3231_clk_sqw",
[DS3231_CLK_32KHZ] = "ds3231_clk_32khz",
};
static struct clk_init_data ds3231_clks_init[] = {
[DS3231_CLK_SQW] = {
.name = "ds3231_clk_sqw",
.ops = &ds3231_clk_sqw_ops,
},
[DS3231_CLK_32KHZ] = {
.name = "ds3231_clk_32khz",
.ops = &ds3231_clk_32khz_ops,
},
};
@ -1627,6 +1632,11 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
if (!onecell->clks)
return -ENOMEM;
/* optional override of the clockname */
device_property_read_string_array(ds1307->dev, "clock-output-names",
ds3231_clks_names,
ARRAY_SIZE(ds3231_clks_names));
for (i = 0; i < ARRAY_SIZE(ds3231_clks_init); i++) {
struct clk_init_data init = ds3231_clks_init[i];
@ -1637,9 +1647,7 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
if (i == DS3231_CLK_SQW && test_bit(HAS_ALARM, &ds1307->flags))
continue;
/* optional override of the clockname */
of_property_read_string_index(node, "clock-output-names", i,
&init.name);
init.name = ds3231_clks_names[i];
ds1307->clks[i].init = &init;
onecell->clks[i] = devm_clk_register(ds1307->dev,
@ -1648,10 +1656,8 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
return PTR_ERR(onecell->clks[i]);
}
if (!node)
return 0;
of_clk_add_provider(node, of_clk_src_onecell_get, onecell);
if (node)
of_clk_add_provider(node, of_clk_src_onecell_get, onecell);
return 0;
}
@ -1735,6 +1741,7 @@ static int ds1307_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ds1307 *ds1307;
const void *match;
int err = -ENODEV;
int tmp;
const struct chip_desc *chip;
@ -1760,9 +1767,9 @@ static int ds1307_probe(struct i2c_client *client,
i2c_set_clientdata(client, ds1307);
if (client->dev.of_node) {
ds1307->type = (enum ds_type)
of_device_get_match_data(&client->dev);
match = device_get_match_data(&client->dev);
if (match) {
ds1307->type = (enum ds_type)match;
chip = &chips[ds1307->type];
} else if (id) {
chip = &chips[id->driver_data];
@ -1786,7 +1793,6 @@ static int ds1307_probe(struct i2c_client *client,
trickle_charger_setup);
}
#ifdef CONFIG_OF
/*
* For devices with no IRQ directly connected to the SoC, the RTC chip
* can be forced as a wakeup source by stating that explicitly in
@ -1795,10 +1801,8 @@ static int ds1307_probe(struct i2c_client *client,
* This will guarantee the 'wakealarm' sysfs entry is available on the device,
* if supported by the RTC.
*/
if (chip->alarm && of_property_read_bool(client->dev.of_node,
"wakeup-source"))
if (chip->alarm && device_property_read_bool(&client->dev, "wakeup-source"))
ds1307_can_wakeup_device = true;
#endif
switch (ds1307->type) {
case ds_1337: