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Message-Id: <20220907164606.65742-5-andriy.shevchenko@linux.intel.com>
Date: Wed, 7 Sep 2022 19:46:02 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Wolfram Sang <wsa+renesas@...g-engineering.com>,
Hans de Goede <hdegoede@...hat.com>,
linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-efi@...r.kernel.org, linux-i2c@...r.kernel.org,
linux-arm-msm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-spi@...r.kernel.org,
devel@...ica.org
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
Len Brown <lenb@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
Elie Morisse <syniurge@...il.com>,
Nehal Shah <nehal-bakulchandra.shah@....com>,
Shyam Sundar S K <shyam-sundar.s-k@....com>,
Khalil Blaiech <kblaiech@...dia.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Daniel Mack <daniel@...que.org>,
Haojian Zhuang <haojian.zhuang@...il.com>,
Robert Jarzmik <robert.jarzmik@...e.fr>,
Mark Brown <broonie@...nel.org>,
Robert Moore <robert.moore@...el.com>,
Wolfram Sang <wsa@...nel.org>
Subject: [PATCH v1 4/8] i2c: amd-mp2-plat: Refactor _UID handling to use acpi_dev_uid_to_integer()
ACPI utils provide acpi_dev_uid_to_integer() helper to extract _UID as
an integer. Use it instead of custom approach.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/i2c/busses/i2c-amd-mp2-plat.c | 27 +++++++++------------------
1 file changed, 9 insertions(+), 18 deletions(-)
diff --git a/drivers/i2c/busses/i2c-amd-mp2-plat.c b/drivers/i2c/busses/i2c-amd-mp2-plat.c
index 84b7e6cbc67b..423fe0c8a471 100644
--- a/drivers/i2c/busses/i2c-amd-mp2-plat.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-plat.c
@@ -244,14 +244,18 @@ static const struct i2c_adapter_quirks amd_i2c_dev_quirks = {
static int i2c_amd_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
int ret;
struct amd_i2c_dev *i2c_dev;
- struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
struct amd_mp2_dev *mp2_dev;
- const char *uid;
+ u64 uid;
- if (!adev)
- return -ENODEV;
+ ret = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid);
+ if (ret)
+ return dev_err_probe(dev, ret, "missing UID/bus id!\n");
+ if (uid >= 2)
+ return dev_err_probe(dev, -EINVAL, "incorrect UID/bus id \"%llu\"!\n", uid);
+ dev_dbg(dev, "bus id is %llu\n", uid);
/* The ACPI namespace doesn't contain information about which MP2 PCI
* device an AMDI0011 ACPI device is related to, so assume that there's
@@ -266,6 +270,7 @@ static int i2c_amd_probe(struct platform_device *pdev)
if (!i2c_dev)
return -ENOMEM;
+ i2c_dev->common.bus_id = uid;
i2c_dev->common.mp2_dev = mp2_dev;
i2c_dev->pdev = pdev;
platform_set_drvdata(pdev, i2c_dev);
@@ -276,20 +281,6 @@ static int i2c_amd_probe(struct platform_device *pdev)
i2c_dev->common.resume = &i2c_amd_resume;
#endif
- uid = adev->pnp.unique_id;
- if (!uid) {
- dev_err(&pdev->dev, "missing UID/bus id!\n");
- return -EINVAL;
- } else if (strcmp(uid, "0") == 0) {
- i2c_dev->common.bus_id = 0;
- } else if (strcmp(uid, "1") == 0) {
- i2c_dev->common.bus_id = 1;
- } else {
- dev_err(&pdev->dev, "incorrect UID/bus id \"%s\"!\n", uid);
- return -EINVAL;
- }
- dev_dbg(&pdev->dev, "bus id is %u\n", i2c_dev->common.bus_id);
-
/* Register the adapter */
amd_mp2_pm_runtime_get(mp2_dev);
--
2.35.1
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