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platform/x86: int3472: Support multiple clock consumers

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At present, the tps68470.c only supports a single clock consumer when
passing platform data to the clock driver. In some devices multiple
sensors depend on the clock provided by a single TPS68470 and so all
need to be able to acquire the clock. Support passing multiple
consumers as platform data.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Daniel Scally 2022-09-22 00:04:37 +01:00 committed by Rafael J. Wysocki
parent 62c8bc0d27
commit 43cf36974d
3 changed files with 67 additions and 12 deletions
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13
drivers/clk/clk-tps68470.c
View File

@ -200,7 +200,9 @@ static int tps68470_clk_probe(struct platform_device *pdev)
.flags = CLK_SET_RATE_GATE,
};
struct tps68470_clkdata *tps68470_clkdata;
struct tps68470_clk_consumer *consumer;
int ret;
int i;
tps68470_clkdata = devm_kzalloc(&pdev->dev, sizeof(*tps68470_clkdata),
GFP_KERNEL);
@ -223,10 +225,13 @@ static int tps68470_clk_probe(struct platform_device *pdev)
return ret;
if (pdata) {
ret = devm_clk_hw_register_clkdev(&pdev->dev,
&tps68470_clkdata->clkout_hw,
pdata->consumer_con_id,
pdata->consumer_dev_name);
for (i = 0; i < pdata->n_consumers; i++) {
consumer = &pdata->consumers[i];
ret = devm_clk_hw_register_clkdev(&pdev->dev,
&tps68470_clkdata->clkout_hw,
consumer->consumer_con_id,
consumer->consumer_dev_name);
}
}
return ret;

59
drivers/platform/x86/intel/int3472/tps68470.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/* Author: Dan Scally <djrscally@gmail.com> */
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
@ -95,20 +96,64 @@ static int skl_int3472_tps68470_calc_type(struct acpi_device *adev)
return DESIGNED_FOR_WINDOWS;
}
/*
* Return the size of the flexible array member, because we'll need that later
* on to pass .pdata_size to cells.
*/
static int
skl_int3472_fill_clk_pdata(struct device *dev, struct tps68470_clk_platform_data **clk_pdata)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
struct acpi_device *consumer;
unsigned int n_consumers = 0;
const char *sensor_name;
unsigned int i = 0;
for_each_acpi_consumer_dev(adev, consumer)
n_consumers++;
if (!n_consumers) {
dev_err(dev, "INT3472 seems to have no dependents\n");
return -ENODEV;
}
*clk_pdata = devm_kzalloc(dev, struct_size(*clk_pdata, consumers, n_consumers),
GFP_KERNEL);
if (!*clk_pdata)
return -ENOMEM;
(*clk_pdata)->n_consumers = n_consumers;
i = 0;
for_each_acpi_consumer_dev(adev, consumer) {
sensor_name = devm_kasprintf(dev, GFP_KERNEL, I2C_DEV_NAME_FORMAT,
acpi_dev_name(consumer));
if (!sensor_name)
return -ENOMEM;
(*clk_pdata)->consumers[i].consumer_dev_name = sensor_name;
i++;
}
acpi_dev_put(consumer);
return n_consumers;
}
static int skl_int3472_tps68470_probe(struct i2c_client *client)
{
struct acpi_device *adev = ACPI_COMPANION(&client->dev);
const struct int3472_tps68470_board_data *board_data;
struct tps68470_clk_platform_data clk_pdata = {};
struct tps68470_clk_platform_data *clk_pdata;
struct mfd_cell *cells;
struct regmap *regmap;
int n_consumers;
int device_type;
int ret;
ret = skl_int3472_get_sensor_adev_and_name(&client->dev, NULL,
&clk_pdata.consumer_dev_name);
if (ret)
return ret;
n_consumers = skl_int3472_fill_clk_pdata(&client->dev, &clk_pdata);
if (n_consumers < 0)
return n_consumers;
regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
if (IS_ERR(regmap)) {
@ -142,8 +187,8 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client)
* the clk + regulators must be ready when this happens.
*/
cells[0].name = "tps68470-clk";
cells[0].platform_data = &clk_pdata;
cells[0].pdata_size = sizeof(clk_pdata);
cells[0].platform_data = clk_pdata;
cells[0].pdata_size = struct_size(clk_pdata, consumers, n_consumers);
cells[1].name = "tps68470-regulator";
cells[1].platform_data = (void *)board_data->tps68470_regulator_pdata;
cells[1].pdata_size = sizeof(struct tps68470_regulator_platform_data);

7
include/linux/platform_data/tps68470.h
View File

@ -27,9 +27,14 @@ struct tps68470_regulator_platform_data {
const struct regulator_init_data *reg_init_data[TPS68470_NUM_REGULATORS];
};
struct tps68470_clk_platform_data {
struct tps68470_clk_consumer {
const char *consumer_dev_name;
const char *consumer_con_id;
};
struct tps68470_clk_platform_data {
unsigned int n_consumers;
struct tps68470_clk_consumer consumers[];
};
#endif