linux-kernel - [PATCH] memory: emif: Use of_property_read

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Message-ID: <20240731191312.1710417-21-robh@kernel.org>
Date: Wed, 31 Jul 2024 13:12:59 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Santosh Shilimkar <ssantosh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] memory: emif: Use of_property_read_bool()

Use of_property_read_bool() to read boolean properties rather than
of_find_property(). This is part of a larger effort to remove callers
of of_find_property() and similar functions. of_find_property() leaks
the DT struct property and data pointers which is a problem for
dynamically allocated nodes which may be freed.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 drivers/memory/emif.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
index 8c5ad5c025fa..974ed641473e 100644
--- a/drivers/memory/emif.c
+++ b/drivers/memory/emif.c
@@ -864,7 +864,7 @@ static void of_get_custom_configs(struct device_node *np_emif,
 						be32_to_cpup(poll_intvl);
 	}
 
-	if (of_find_property(np_emif, "extended-temp-part", &len))
+	if (of_property_read_bool(np_emif, "extended-temp-part"))
 		cust_cfgs->mask |= EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART;
 
 	if (!is_custom_config_valid(cust_cfgs, emif->dev)) {
@@ -880,13 +880,9 @@ static void of_get_ddr_info(struct device_node *np_emif,
 		struct ddr_device_info *dev_info)
 {
 	u32 density = 0, io_width = 0;
-	int len;
 
-	if (of_find_property(np_emif, "cs1-used", &len))
-		dev_info->cs1_used = true;
-
-	if (of_find_property(np_emif, "cal-resistor-per-cs", &len))
-		dev_info->cal_resistors_per_cs = true;
+	dev_info->cs1_used = of_property_read_bool(np_emif, "cs1-used");
+	dev_info->cal_resistors_per_cs = of_property_read_bool(np_emif, "cal-resistor-per-cs");
 
 	if (of_device_is_compatible(np_ddr, "jedec,lpddr2-s4"))
 		dev_info->type = DDR_TYPE_LPDDR2_S4;
@@ -916,7 +912,6 @@ static struct emif_data *of_get_memory_device_details(
 	struct ddr_device_info		*dev_info = NULL;
 	struct emif_platform_data	*pd = NULL;
 	struct device_node		*np_ddr;
-	int				len;
 
 	np_ddr = of_parse_phandle(np_emif, "device-handle", 0);
 	if (!np_ddr)
@@ -944,7 +939,7 @@ static struct emif_data *of_get_memory_device_details(
 
 	of_property_read_u32(np_emif, "phy-type", &pd->phy_type);
 
-	if (of_find_property(np_emif, "hw-caps-ll-interface", &len))
+	if (of_property_read_bool(np_emif, "hw-caps-ll-interface"))
 		pd->hw_caps |= EMIF_HW_CAPS_LL_INTERFACE;
 
 	of_get_ddr_info(np_emif, np_ddr, dev_info);
-- 
2.43.0