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* [RFC PATCH] dm: add cells_count parameter in *_count_phandle_with_args
@ 2020-09-10 16:43 Patrick Delaunay
  2020-09-22 18:48 ` Simon Glass
  0 siblings, 1 reply; 4+ messages in thread
From: Patrick Delaunay @ 2020-09-10 16:43 UTC (permalink / raw)
  To: u-boot

The cell_count argument is required when cells_name is NULL.

This patch adds this parameter in live tree API
- of_count_phandle_with_args
- ofnode_count_phandle_with_args
- dev_count_phandle_with_args

This parameter solves issue when these API is used to count
the number of element of a cell without cell name. This parameter
allow to force the size cell.

For example:
  count = dev_count_phandle_with_args(dev, "array", NULL, 3);

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
---
I push today this RFC.

It is linked to previous serie [1] but it is not a blocking point today
as no user use this API with cells_name = NULL
+ dev_count_phandle_with_args
+ ofnode_count_phandle_with_args

But I think it is the good time to modify these functions as they are not
hugely used: it is the proposition in this RFC.

It is just a RFC because I don't sure if I can modify the existing API
even if parameters are aligned with *_parse_phandle_with_args.

I can also to add new APIs to use when cells_name is NULL:
+ dev_count_phandle_with_cell_count(node, list_name, cell_count);
+ ofnode_count_phandle_with_cell_count(node, list_name, cell_count);

and raise a error if cells_name == NULL in existing function
+ dev_count_phandle_with_args
+ ofnode_count_phandle_with_args

[1] http://patchwork.ozlabs.org/project/uboot/list/?series=200899
    "dm: add cells_count parameter in live DT APIs of_parse_phandle_with_args"


 board/st/stm32mp1/stm32mp1.c    | 2 +-
 drivers/clk/clk-uclass.c        | 4 ++--
 drivers/core/of_access.c        | 7 ++++---
 drivers/core/ofnode.c           | 6 +++---
 drivers/core/read.c             | 5 +++--
 drivers/phy/phy-uclass.c        | 2 +-
 drivers/reset/reset-uclass.c    | 2 +-
 drivers/usb/host/ehci-generic.c | 4 ++--
 include/dm/of_access.h          | 4 +++-
 include/dm/ofnode.h             | 3 ++-
 include/dm/read.h               | 8 +++++---
 11 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 3b677d339b..03a19af930 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -314,7 +314,7 @@ static int board_check_usb_power(void)
 	 * for each of them
 	 */
 	adc_count = ofnode_count_phandle_with_args(node, "st,adc_usb_pd",
-						   "#io-channel-cells");
+						   "#io-channel-cells", 0);
 	if (adc_count < 0) {
 		if (adc_count == -ENOENT)
 			return 0;
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 934cd5787a..b1d8f1adaf 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -160,7 +160,7 @@ int clk_get_bulk(struct udevice *dev, struct clk_bulk *bulk)
 	
 	bulk->count = 0;
 
-	count = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
+	count = dev_count_phandle_with_args(dev, "clocks", "#clock-cells", 0);
 	if (count < 1)
 		return count;
 
@@ -195,7 +195,7 @@ static int clk_set_default_parents(struct udevice *dev, int stage)
 	int ret;
 
 	num_parents = dev_count_phandle_with_args(dev, "assigned-clock-parents",
-						  "#clock-cells");
+						  "#clock-cells", 0);
 	if (num_parents < 0) {
 		debug("%s: could not read assigned-clock-parents for %p\n",
 		      __func__, dev);
diff --git a/drivers/core/of_access.c b/drivers/core/of_access.c
index bcf1644d05..0a12e9b26f 100644
--- a/drivers/core/of_access.c
+++ b/drivers/core/of_access.c
@@ -756,10 +756,11 @@ int of_parse_phandle_with_args(const struct device_node *np,
 }
 
 int of_count_phandle_with_args(const struct device_node *np,
-			       const char *list_name, const char *cells_name)
+			       const char *list_name, const char *cells_name,
+			       int cell_count)
 {
-	return __of_parse_phandle_with_args(np, list_name, cells_name, 0,
-					    -1, NULL);
+	return __of_parse_phandle_with_args(np, list_name, cells_name,
+					    cell_count, -1, NULL);
 }
 
 static void of_alias_add(struct alias_prop *ap, struct device_node *np,
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 79fcdf5ce2..7d1b89514c 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -432,15 +432,15 @@ int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 }
 
 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
-				   const char *cells_name)
+				   const char *cells_name, int cell_count)
 {
 	if (ofnode_is_np(node))
 		return of_count_phandle_with_args(ofnode_to_np(node),
-				list_name, cells_name);
+				list_name, cells_name, cell_count);
 	else
 		return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 				ofnode_to_offset(node), list_name, cells_name,
-				0, -1, NULL);
+				cell_count, -1, NULL);
 }
 
 ofnode ofnode_path(const char *path)
diff --git a/drivers/core/read.c b/drivers/core/read.c
index 86f3f88170..076125824c 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -214,10 +214,11 @@ int dev_read_phandle_with_args(const struct udevice *dev, const char *list_name,
 }
 
 int dev_count_phandle_with_args(const struct udevice *dev,
-				const char *list_name, const char *cells_name)
+				const char *list_name, const char *cells_name,
+				int cell_count)
 {
 	return ofnode_count_phandle_with_args(dev_ofnode(dev), list_name,
-					      cells_name);
+					      cells_name, cell_count);
 }
 
 int dev_read_addr_cells(const struct udevice *dev)
diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c
index db7f39cd0b..8713b8e7b7 100644
--- a/drivers/phy/phy-uclass.c
+++ b/drivers/phy/phy-uclass.c
@@ -179,7 +179,7 @@ int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
 	if (!dev_read_prop(dev, "phys", NULL))
 		return 0;
 
-	count = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
+	count = dev_count_phandle_with_args(dev, "phys", "#phy-cells", 0);
 	if (count < 1)
 		return count;
 
diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c
index 5e38ce5c06..411ad649ca 100644
--- a/drivers/reset/reset-uclass.c
+++ b/drivers/reset/reset-uclass.c
@@ -106,7 +106,7 @@ int reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk)
 	
 	bulk->count = 0;
 
-	count = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
+	count = dev_count_phandle_with_args(dev, "resets", "#reset-cells", 0);
 	if (count < 1)
 		return count;
 
diff --git a/drivers/usb/host/ehci-generic.c b/drivers/usb/host/ehci-generic.c
index 304a3437d5..c93a7051a7 100644
--- a/drivers/usb/host/ehci-generic.c
+++ b/drivers/usb/host/ehci-generic.c
@@ -86,7 +86,7 @@ static int ehci_usb_probe(struct udevice *dev)
 	err = 0;
 	priv->clock_count = 0;
 	clock_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "clocks",
-						  "#clock-cells");
+						  "#clock-cells", 0);
 	if (clock_nb > 0) {
 		priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
 					    GFP_KERNEL);
@@ -116,7 +116,7 @@ static int ehci_usb_probe(struct udevice *dev)
 
 	priv->reset_count = 0;
 	reset_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "resets",
-						  "#reset-cells");
+						  "#reset-cells", 0);
 	if (reset_nb > 0) {
 		priv->resets = devm_kcalloc(dev, reset_nb,
 					    sizeof(struct reset_ctl),
diff --git a/include/dm/of_access.h b/include/dm/of_access.h
index 2fa65c9332..cc382b1671 100644
--- a/include/dm/of_access.h
+++ b/include/dm/of_access.h
@@ -450,6 +450,7 @@ int of_parse_phandle_with_args(const struct device_node *np,
  * @np:		pointer to a device tree node containing a list
  * @list_name:	property name that contains a list
  * @cells_name:	property name that specifies phandles' arguments count
+ * @cells_count: Cell count to use if @cells_name is NULL
  * @return number of phandle found, -ENOENT if
  *	@list_name does not exist, -EINVAL if a phandle was not found,
  *	@cells_name could not be found, the arguments were truncated or there
@@ -460,7 +461,8 @@ int of_parse_phandle_with_args(const struct device_node *np,
  *
  */
 int of_count_phandle_with_args(const struct device_node *np,
-			       const char *list_name, const char *cells_name);
+			       const char *list_name, const char *cells_name,
+			       int cells_count);
 
 /**
  * of_alias_scan() - Scan all properties of the 'aliases' node
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 8df2facf99..1726b6b2f9 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -555,12 +555,13 @@ int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
  * @node:	device tree node containing a list
  * @list_name:	property name that contains a list
  * @cells_name:	property name that specifies phandles' arguments count
+ * @cells_count: Cell count to use if @cells_name is NULL
  * @return number of phandle on success, -ENOENT if @list_name does not
  *      exist, -EINVAL if a phandle was not found, @cells_name could not
  *      be found.
  */
 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
-				   const char *cells_name);
+				   const char *cells_name, int cell_count);
 
 /**
  * ofnode_path() - find a node by full path
diff --git a/include/dm/read.h b/include/dm/read.h
index 67db94adfc..0585eb1228 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -429,12 +429,14 @@ int dev_read_phandle_with_args(const struct udevice *dev, const char *list_name,
  * @dev:	device whose node containing a list
  * @list_name:	property name that contains a list
  * @cells_name:	property name that specifies phandles' arguments count
+ * @cells_count: Cell count to use if @cells_name is NULL
  * @Returns number of phandle found on success, on error returns appropriate
  * errno value.
  */
 
 int dev_count_phandle_with_args(const struct udevice *dev,
-				const char *list_name, const char *cells_name);
+				const char *list_name, const char *cells_name,
+				int cell_count);
 
 /**
  * dev_read_addr_cells() - Get the number of address cells for a device's node
@@ -880,10 +882,10 @@ static inline int dev_read_phandle_with_args(const struct udevice *dev,
 }
 
 static inline int dev_count_phandle_with_args(const struct udevice *dev,
-		const char *list_name, const char *cells_name)
+		const char *list_name, const char *cells_name, int cell_count)
 {
 	return ofnode_count_phandle_with_args(dev_ofnode(dev), list_name,
-					      cells_name);
+					      cells_name, cell_count);
 }
 
 static inline int dev_read_addr_cells(const struct udevice *dev)
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-09-24 16:08 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2020-09-10 16:43 [RFC PATCH] dm: add cells_count parameter in *_count_phandle_with_args Patrick Delaunay
2020-09-22 18:48 ` Simon Glass
2020-09-23 15:06   ` Patrick DELAUNAY
2020-09-24 16:08     ` Simon Glass

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