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Message-ID: <20250703183502.2074538-1-robh@kernel.org>
Date: Thu, 3 Jul 2025 13:35:01 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Jeff Johnson <jjohnson@...nel.org>,
Felix Fietkau <nbd@....name>,
Lorenzo Bianconi <lorenzo@...nel.org>,
Ryder Lee <ryder.lee@...iatek.com>,
Shayne Chen <shayne.chen@...iatek.com>,
Sean Wang <sean.wang@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: linux-wireless@...r.kernel.org,
ath10k@...ts.infradead.org,
linux-kernel@...r.kernel.org,
ath11k@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: [PATCH] wireless: Use of_reserved_mem_region_to_resource() for "memory-region"
Use the newly added of_reserved_mem_region_to_resource() function to
handle "memory-region" properties.
The error handling is a bit different for ath10k. "memory-region" is
optional, so failed lookup is not an error. But then an error in
of_address_to_resource() is treated as an error. However, that
distinction is not really important. Either the region is available
and usable or it is not. So now, it is just
of_reserved_mem_region_to_resource() which is checked for an error.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
drivers/net/wireless/ath/ath10k/snoc.c | 14 +++----------
drivers/net/wireless/ath/ath11k/ahb.c | 17 +++------------
drivers/net/wireless/ath/ath11k/qmi.c | 17 ++++-----------
.../net/wireless/mediatek/mt76/mt7915/soc.c | 21 +++++++------------
4 files changed, 18 insertions(+), 51 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index b2bf9d72b92f..5c61a3abd33b 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -13,7 +13,7 @@
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc/qcom_rproc.h>
-#include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
#include <linux/iommu.h>
#include "ce.h"
@@ -1557,19 +1557,11 @@ static void ath10k_modem_deinit(struct ath10k *ar)
static int ath10k_setup_msa_resources(struct ath10k *ar, u32 msa_size)
{
struct device *dev = ar->dev;
- struct device_node *node;
struct resource r;
int ret;
- node = of_parse_phandle(dev->of_node, "memory-region", 0);
- if (node) {
- ret = of_address_to_resource(node, 0, &r);
- of_node_put(node);
- if (ret) {
- dev_err(dev, "failed to resolve msa fixed region\n");
- return ret;
- }
-
+ ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &r);
+ if (!ret) {
ar->msa.paddr = r.start;
ar->msa.mem_size = resource_size(&r);
ar->msa.vaddr = devm_memremap(dev, ar->msa.paddr,
diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index fde1ce43c499..2e8a77ceb8bb 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -9,8 +9,8 @@
#include <linux/property.h>
#include <linux/of_device.h>
#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
#include <linux/dma-mapping.h>
-#include <linux/of_address.h>
#include <linux/iommu.h>
#include "ahb.h"
#include "debug.h"
@@ -919,16 +919,10 @@ static int ath11k_ahb_setup_msa_resources(struct ath11k_base *ab)
{
struct ath11k_ahb *ab_ahb = ath11k_ahb_priv(ab);
struct device *dev = ab->dev;
- struct device_node *node;
struct resource r;
int ret;
- node = of_parse_phandle(dev->of_node, "memory-region", 0);
- if (!node)
- return -ENOENT;
-
- ret = of_address_to_resource(node, 0, &r);
- of_node_put(node);
+ ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &r);
if (ret) {
dev_err(dev, "failed to resolve msa fixed region\n");
return ret;
@@ -937,12 +931,7 @@ static int ath11k_ahb_setup_msa_resources(struct ath11k_base *ab)
ab_ahb->fw.msa_paddr = r.start;
ab_ahb->fw.msa_size = resource_size(&r);
- node = of_parse_phandle(dev->of_node, "memory-region", 1);
- if (!node)
- return -ENOENT;
-
- ret = of_address_to_resource(node, 0, &r);
- of_node_put(node);
+ ret = of_reserved_mem_region_to_resource(dev->of_node, 1, &r);
if (ret) {
dev_err(dev, "failed to resolve ce fixed region\n");
return ret;
diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index 2782f4723e41..fb53efbc5b68 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -11,7 +11,7 @@
#include "debug.h"
#include "hif.h"
#include <linux/of.h>
-#include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
#include <linux/ioport.h>
#include <linux/firmware.h>
#include <linux/of_irq.h>
@@ -2038,23 +2038,14 @@ static int ath11k_qmi_alloc_target_mem_chunk(struct ath11k_base *ab)
static int ath11k_qmi_assign_target_mem_chunk(struct ath11k_base *ab)
{
struct device *dev = ab->dev;
- struct device_node *hremote_node = NULL;
- struct resource res;
+ struct resource res = {};
u32 host_ddr_sz;
int i, idx, ret;
for (i = 0, idx = 0; i < ab->qmi.mem_seg_count; i++) {
switch (ab->qmi.target_mem[i].type) {
case HOST_DDR_REGION_TYPE:
- hremote_node = of_parse_phandle(dev->of_node, "memory-region", 0);
- if (!hremote_node) {
- ath11k_dbg(ab, ATH11K_DBG_QMI,
- "fail to get hremote_node\n");
- return -ENODEV;
- }
-
- ret = of_address_to_resource(hremote_node, 0, &res);
- of_node_put(hremote_node);
+ ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res);
if (ret) {
ath11k_dbg(ab, ATH11K_DBG_QMI,
"fail to get reg from hremote\n");
@@ -2093,7 +2084,7 @@ static int ath11k_qmi_assign_target_mem_chunk(struct ath11k_base *ab)
}
if (ath11k_core_coldboot_cal_support(ab)) {
- if (hremote_node) {
+ if (resource_size(&res)) {
ab->qmi.target_mem[idx].paddr =
res.start + host_ddr_sz;
ab->qmi.target_mem[idx].iaddr =
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/soc.c b/drivers/net/wireless/mediatek/mt76/mt7915/soc.c
index c823a7554a3a..5f19b506cc50 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/soc.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/soc.c
@@ -284,20 +284,15 @@ static int mt798x_wmac_coninfra_check(struct mt7915_dev *dev)
static int mt798x_wmac_coninfra_setup(struct mt7915_dev *dev)
{
struct device *pdev = dev->mt76.dev;
- struct reserved_mem *rmem;
- struct device_node *np;
+ struct resource res;
u32 val;
+ int ret;
- np = of_parse_phandle(pdev->of_node, "memory-region", 0);
- if (!np)
- return -EINVAL;
-
- rmem = of_reserved_mem_lookup(np);
- of_node_put(np);
- if (!rmem)
- return -EINVAL;
+ ret = of_reserved_mem_region_to_resource(pdev->of_node, 0, &res);
+ if (ret)
+ return ret;
- val = (rmem->base >> 16) & MT_TOP_MCU_EMI_BASE_MASK;
+ val = (res.start >> 16) & MT_TOP_MCU_EMI_BASE_MASK;
if (is_mt7986(&dev->mt76)) {
/* Set conninfra subsys PLL check */
@@ -318,8 +313,8 @@ static int mt798x_wmac_coninfra_setup(struct mt7915_dev *dev)
MT_TOP_EFUSE_BASE_MASK, 0x11f20000 >> 16);
}
- mt76_wr(dev, MT_INFRA_BUS_EMI_START, rmem->base);
- mt76_wr(dev, MT_INFRA_BUS_EMI_END, rmem->size);
+ mt76_wr(dev, MT_INFRA_BUS_EMI_START, res.start);
+ mt76_wr(dev, MT_INFRA_BUS_EMI_END, resource_size(&res));
mt76_rr(dev, MT_CONN_INFRA_EFUSE);
--
2.47.2
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