linux-kernel - [PATCH] perf/marvell: Add ACPI support to TAD uncore driver

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Date:   Fri, 9 Dec 2022 11:07:15 +0530
From:   Gowthami Thiagarajan <gthiagarajan@...vell.com>
To:     <will@...nel.org>, <mark.rutland@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <sgoutham@...vell.com>, <gcherian@...vell.com>,
        <bbhushan2@...vell.com>,
        Gowthami Thiagarajan <gthiagarajan@...vell.com>
Subject: [PATCH] perf/marvell: Add ACPI support to TAD uncore driver

Add support for ACPI based device registration so that the driver
can be also enabled through ACPI table. 
While at that change the DT specific API's to device_* API's so that 
both DT based and ACPI based probing works.

Signed-off-by: Gowthami Thiagarajan <gthiagarajan@...vell.com>
---
 drivers/perf/marvell_cn10k_tad_pmu.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/perf/marvell_cn10k_tad_pmu.c b/drivers/perf/marvell_cn10k_tad_pmu.c
index 69c3050a4348..b1f5580e070a 100644
--- a/drivers/perf/marvell_cn10k_tad_pmu.c
+++ b/drivers/perf/marvell_cn10k_tad_pmu.c
@@ -13,6 +13,7 @@
 #include <linux/cpuhotplug.h>
 #include <linux/perf_event.h>
 #include <linux/platform_device.h>
+#include <linux/acpi.h>
 
 #define TAD_PFC_OFFSET		0x800
 #define TAD_PFC(counter)	(TAD_PFC_OFFSET | (counter << 3))
@@ -254,7 +255,7 @@ static const struct attribute_group *tad_pmu_attr_groups[] = {
 
 static int tad_pmu_probe(struct platform_device *pdev)
 {
-	struct device_node *node = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
 	struct tad_region *regions;
 	struct tad_pmu *tad_pmu;
 	struct resource *res;
@@ -276,21 +277,21 @@ static int tad_pmu_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	ret = of_property_read_u32(node, "marvell,tad-page-size",
-				   &tad_page_size);
+	ret = device_property_read_u32(dev, "marvell,tad-page-size",
+				       &tad_page_size);
 	if (ret) {
 		dev_err(&pdev->dev, "Can't find tad-page-size property\n");
 		return ret;
 	}
 
-	ret = of_property_read_u32(node, "marvell,tad-pmu-page-size",
-				   &tad_pmu_page_size);
+	ret = device_property_read_u32(dev, "marvell,tad-pmu-page-size",
+				       &tad_pmu_page_size);
 	if (ret) {
 		dev_err(&pdev->dev, "Can't find tad-pmu-page-size property\n");
 		return ret;
 	}
 
-	ret = of_property_read_u32(node, "marvell,tad-cnt", &tad_cnt);
+	ret = device_property_read_u32(dev, "marvell,tad-cnt", &tad_cnt);
 	if (ret) {
 		dev_err(&pdev->dev, "Can't find tad-cnt property\n");
 		return ret;
@@ -369,10 +370,19 @@ static const struct of_device_id tad_pmu_of_match[] = {
 };
 #endif
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id tad_pmu_acpi_match[] = {
+	{"MRVL000B", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, tad_pmu_acpi_match);
+#endif
+
 static struct platform_driver tad_pmu_driver = {
 	.driver         = {
 		.name   = "cn10k_tad_pmu",
 		.of_match_table = of_match_ptr(tad_pmu_of_match),
+		.acpi_match_table = ACPI_PTR(tad_pmu_acpi_match),
 		.suppress_bind_attrs = true,
 	},
 	.probe          = tad_pmu_probe,
-- 
2.25.1