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path: root/drivers/soc/samsung/exynos-asv.c
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Diffstat (limited to 'drivers/soc/samsung/exynos-asv.c')
-rw-r--r--drivers/soc/samsung/exynos-asv.c57
1 files changed, 20 insertions, 37 deletions
diff --git a/drivers/soc/samsung/exynos-asv.c b/drivers/soc/samsung/exynos-asv.c
index 8abf4dfaa5c5..d60af8acc391 100644
--- a/drivers/soc/samsung/exynos-asv.c
+++ b/drivers/soc/samsung/exynos-asv.c
@@ -2,7 +2,9 @@
/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
+ * Copyright (c) 2020 Krzysztof Kozlowski <krzk@kernel.org>
* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ * Author: Krzysztof Kozlowski <krzk@kernel.org>
*
* Samsung Exynos SoC Adaptive Supply Voltage support
*/
@@ -10,12 +12,7 @@
#include <linux/cpu.h>
#include <linux/device.h>
#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/mfd/syscon.h>
-#include <linux/module.h>
#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/regmap.h>
#include <linux/soc/samsung/exynos-chipid.h>
@@ -111,7 +108,7 @@ static int exynos_asv_update_opps(struct exynos_asv *asv)
return 0;
}
-static int exynos_asv_probe(struct platform_device *pdev)
+int exynos_asv_init(struct device *dev, struct regmap *regmap)
{
int (*probe_func)(struct exynos_asv *asv);
struct exynos_asv *asv;
@@ -119,39 +116,39 @@ static int exynos_asv_probe(struct platform_device *pdev)
u32 product_id = 0;
int ret, i;
- cpu_dev = get_cpu_device(0);
- ret = dev_pm_opp_get_opp_count(cpu_dev);
- if (ret < 0)
- return -EPROBE_DEFER;
-
- asv = devm_kzalloc(&pdev->dev, sizeof(*asv), GFP_KERNEL);
+ asv = devm_kzalloc(dev, sizeof(*asv), GFP_KERNEL);
if (!asv)
return -ENOMEM;
- asv->chipid_regmap = device_node_to_regmap(pdev->dev.of_node);
- if (IS_ERR(asv->chipid_regmap)) {
- dev_err(&pdev->dev, "Could not find syscon regmap\n");
- return PTR_ERR(asv->chipid_regmap);
+ asv->chipid_regmap = regmap;
+ asv->dev = dev;
+ ret = regmap_read(asv->chipid_regmap, EXYNOS_CHIPID_REG_PRO_ID,
+ &product_id);
+ if (ret < 0) {
+ dev_err(dev, "Cannot read revision from ChipID: %d\n", ret);
+ return -ENODEV;
}
- regmap_read(asv->chipid_regmap, EXYNOS_CHIPID_REG_PRO_ID, &product_id);
-
switch (product_id & EXYNOS_MASK) {
case 0xE5422000:
probe_func = exynos5422_asv_init;
break;
default:
- return -ENODEV;
+ dev_dbg(dev, "No ASV support for this SoC\n");
+ devm_kfree(dev, asv);
+ return 0;
}
- ret = of_property_read_u32(pdev->dev.of_node, "samsung,asv-bin",
+ cpu_dev = get_cpu_device(0);
+ ret = dev_pm_opp_get_opp_count(cpu_dev);
+ if (ret < 0)
+ return -EPROBE_DEFER;
+
+ ret = of_property_read_u32(dev->of_node, "samsung,asv-bin",
&asv->of_bin);
if (ret < 0)
asv->of_bin = -EINVAL;
- asv->dev = &pdev->dev;
- dev_set_drvdata(&pdev->dev, asv);
-
for (i = 0; i < ARRAY_SIZE(asv->subsys); i++)
asv->subsys[i].asv = asv;
@@ -161,17 +158,3 @@ static int exynos_asv_probe(struct platform_device *pdev)
return exynos_asv_update_opps(asv);
}
-
-static const struct of_device_id exynos_asv_of_device_ids[] = {
- { .compatible = "samsung,exynos4210-chipid" },
- {}
-};
-
-static struct platform_driver exynos_asv_driver = {
- .driver = {
- .name = "exynos-asv",
- .of_match_table = exynos_asv_of_device_ids,
- },
- .probe = exynos_asv_probe,
-};
-module_platform_driver(exynos_asv_driver);