diff mbox series

interconnect: constify of_phandle_args in xlate

Message ID 20240216135236.129878-1-krzysztof.kozlowski@linaro.org
State Superseded
Headers show
Series interconnect: constify of_phandle_args in xlate | expand

Commit Message

Krzysztof Kozlowski Feb. 16, 2024, 1:52 p.m. UTC 
The xlate callbacks are supposed to translate of_phandle_args to proper
provider without modifying the of_phandle_args.  Make the argument
pointer to const for code safety and readability.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 drivers/gpio/gpiolib-of.c              |  2 +-
 drivers/interconnect/core.c            |  4 ++--
 drivers/interconnect/qcom/icc-common.c |  3 ++-
 drivers/interconnect/qcom/icc-common.h |  3 ++-
 drivers/interconnect/samsung/exynos.c  |  2 +-
 drivers/memory/tegra/mc.c              |  2 +-
 drivers/memory/tegra/tegra124-emc.c    |  2 +-
 drivers/memory/tegra/tegra124.c        |  2 +-
 drivers/memory/tegra/tegra186-emc.c    |  2 +-
 drivers/memory/tegra/tegra20-emc.c     |  2 +-
 drivers/memory/tegra/tegra20.c         |  2 +-
 drivers/memory/tegra/tegra30-emc.c     |  2 +-
 drivers/memory/tegra/tegra30.c         |  2 +-
 include/linux/interconnect-provider.h  | 11 ++++++-----
 include/soc/tegra/mc.h                 |  7 ++++---
 15 files changed, 26 insertions(+), 22 deletions(-)

Comments

Thierry Reding Feb. 19, 2024, 4:27 p.m. UTC | #1 
On Fri Feb 16, 2024 at 2:59 PM CET, Krzysztof Kozlowski wrote:
> On 16/02/2024 14:55, Konrad Dybcio wrote:
> > On 16.02.2024 14:52, Krzysztof Kozlowski wrote:
> >> The xlate callbacks are supposed to translate of_phandle_args to proper
> >> provider without modifying the of_phandle_args.  Make the argument
> >> pointer to const for code safety and readability.
> >>
> >> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> >> ---
> >>  drivers/gpio/gpiolib-of.c              |  2 +-
> >>  drivers/interconnect/core.c            |  4 ++--
> >>  drivers/interconnect/qcom/icc-common.c |  3 ++-
> >>  drivers/interconnect/qcom/icc-common.h |  3 ++-
> >>  drivers/interconnect/samsung/exynos.c  |  2 +-
> >>  drivers/memory/tegra/mc.c              |  2 +-
> >>  drivers/memory/tegra/tegra124-emc.c    |  2 +-
> >>  drivers/memory/tegra/tegra124.c        |  2 +-
> >>  drivers/memory/tegra/tegra186-emc.c    |  2 +-
> >>  drivers/memory/tegra/tegra20-emc.c     |  2 +-
> >>  drivers/memory/tegra/tegra20.c         |  2 +-
> >>  drivers/memory/tegra/tegra30-emc.c     |  2 +-
> >>  drivers/memory/tegra/tegra30.c         |  2 +-
> >>  include/linux/interconnect-provider.h  | 11 ++++++-----
> >>  include/soc/tegra/mc.h                 |  7 ++++---
> > 
> > Ended up being a bit wider than just icc..
> > 
> > Looks sane apart from that
>
> Tegra memory controllers are also interconnect providers, so two subsystems.
>
> This patch should go via interconnect tree.

I think Konrad might have been referring to the GPIO hunk, which seems
out of place. For the Tegra parts, though:

Acked-by: Thierry Reding <treding@nvidia.com>
Krzysztof Kozlowski Feb. 20, 2024, 6:59 a.m. UTC | #2 
On 19/02/2024 17:27, Thierry Reding wrote:
> On Fri Feb 16, 2024 at 2:59 PM CET, Krzysztof Kozlowski wrote:
>> On 16/02/2024 14:55, Konrad Dybcio wrote:
>>> On 16.02.2024 14:52, Krzysztof Kozlowski wrote:
>>>> The xlate callbacks are supposed to translate of_phandle_args to proper
>>>> provider without modifying the of_phandle_args.  Make the argument
>>>> pointer to const for code safety and readability.
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>>>> ---
>>>>  drivers/gpio/gpiolib-of.c              |  2 +-
>>>>  drivers/interconnect/core.c            |  4 ++--
>>>>  drivers/interconnect/qcom/icc-common.c |  3 ++-
>>>>  drivers/interconnect/qcom/icc-common.h |  3 ++-
>>>>  drivers/interconnect/samsung/exynos.c  |  2 +-
>>>>  drivers/memory/tegra/mc.c              |  2 +-
>>>>  drivers/memory/tegra/tegra124-emc.c    |  2 +-
>>>>  drivers/memory/tegra/tegra124.c        |  2 +-
>>>>  drivers/memory/tegra/tegra186-emc.c    |  2 +-
>>>>  drivers/memory/tegra/tegra20-emc.c     |  2 +-
>>>>  drivers/memory/tegra/tegra20.c         |  2 +-
>>>>  drivers/memory/tegra/tegra30-emc.c     |  2 +-
>>>>  drivers/memory/tegra/tegra30.c         |  2 +-
>>>>  include/linux/interconnect-provider.h  | 11 ++++++-----
>>>>  include/soc/tegra/mc.h                 |  7 ++++---
>>>
>>> Ended up being a bit wider than just icc..
>>>
>>> Looks sane apart from that
>>
>> Tegra memory controllers are also interconnect providers, so two subsystems.
>>
>> This patch should go via interconnect tree.
> 
> I think Konrad might have been referring to the GPIO hunk, which seems
> out of place. For the Tegra parts, though:

Oh, that's right. I mixed up patches.

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 35d717fd393f..708b0d51f4b7 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -129,7 +129,7 @@  static int of_gpiochip_match_node_and_xlate(struct gpio_chip *chip,
 }
 
 static struct gpio_device *
-of_find_gpio_device_by_xlate(struct of_phandle_args *gpiospec)
+of_find_gpio_device_by_xlate(const struct of_phandle_args *gpiospec)
 {
 	return gpio_device_find(gpiospec, of_gpiochip_match_node_and_xlate);
 }
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 50bac2d79d9b..5d1010cafed8 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -343,7 +343,7 @@  EXPORT_SYMBOL_GPL(icc_std_aggregate);
  * an array of icc nodes specified in the icc_onecell_data struct when
  * registering the provider.
  */
-struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec,
+struct icc_node *of_icc_xlate_onecell(const struct of_phandle_args *spec,
 				      void *data)
 {
 	struct icc_onecell_data *icc_data = data;
@@ -368,7 +368,7 @@  EXPORT_SYMBOL_GPL(of_icc_xlate_onecell);
  * Returns a valid pointer to struct icc_node_data on success or ERR_PTR()
  * on failure.
  */
-struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec)
+struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec)
 {
 	struct icc_node *node = ERR_PTR(-EPROBE_DEFER);
 	struct icc_node_data *data = NULL;
diff --git a/drivers/interconnect/qcom/icc-common.c b/drivers/interconnect/qcom/icc-common.c
index f27f4fdc4531..9b9ee113f172 100644
--- a/drivers/interconnect/qcom/icc-common.c
+++ b/drivers/interconnect/qcom/icc-common.c
@@ -9,7 +9,8 @@ 
 
 #include "icc-common.h"
 
-struct icc_node_data *qcom_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+struct icc_node_data *qcom_icc_xlate_extended(const struct of_phandle_args *spec,
+					      void *data)
 {
 	struct icc_node_data *ndata;
 	struct icc_node *node;
diff --git a/drivers/interconnect/qcom/icc-common.h b/drivers/interconnect/qcom/icc-common.h
index 33bb2c38dff3..21c39b163948 100644
--- a/drivers/interconnect/qcom/icc-common.h
+++ b/drivers/interconnect/qcom/icc-common.h
@@ -8,6 +8,7 @@ 
 
 #include <linux/interconnect-provider.h>
 
-struct icc_node_data *qcom_icc_xlate_extended(struct of_phandle_args *spec, void *data);
+struct icc_node_data *qcom_icc_xlate_extended(const struct of_phandle_args *spec,
+					      void *data);
 
 #endif
diff --git a/drivers/interconnect/samsung/exynos.c b/drivers/interconnect/samsung/exynos.c
index 1ba14cb45d5a..c9e5361e17c5 100644
--- a/drivers/interconnect/samsung/exynos.c
+++ b/drivers/interconnect/samsung/exynos.c
@@ -82,7 +82,7 @@  static int exynos_generic_icc_set(struct icc_node *src, struct icc_node *dst)
 	return 0;
 }
 
-static struct icc_node *exynos_generic_icc_xlate(struct of_phandle_args *spec,
+static struct icc_node *exynos_generic_icc_xlate(const struct of_phandle_args *spec,
 						 void *data)
 {
 	struct exynos_icc_priv *priv = data;
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index a083921a8968..224b488794e5 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -755,7 +755,7 @@  const char *const tegra_mc_error_names[8] = {
 	[6] = "SMMU translation error",
 };
 
-struct icc_node *tegra_mc_icc_xlate(struct of_phandle_args *spec, void *data)
+struct icc_node *tegra_mc_icc_xlate(const struct of_phandle_args *spec, void *data)
 {
 	struct tegra_mc *mc = icc_provider_to_tegra_mc(data);
 	struct icc_node *node;
diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c
index 00ed2b6a0d1b..47c0c19e13fd 100644
--- a/drivers/memory/tegra/tegra124-emc.c
+++ b/drivers/memory/tegra/tegra124-emc.c
@@ -1285,7 +1285,7 @@  to_tegra_emc_provider(struct icc_provider *provider)
 }
 
 static struct icc_node_data *
-emc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+emc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct icc_provider *provider = data;
 	struct icc_node_data *ndata;
diff --git a/drivers/memory/tegra/tegra124.c b/drivers/memory/tegra/tegra124.c
index 470b7dbab2c2..9d7393e19f12 100644
--- a/drivers/memory/tegra/tegra124.c
+++ b/drivers/memory/tegra/tegra124.c
@@ -1170,7 +1170,7 @@  static int tegra124_mc_icc_aggreate(struct icc_node *node, u32 tag, u32 avg_bw,
 }
 
 static struct icc_node_data *
-tegra124_mc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+tegra124_mc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct tegra_mc *mc = icc_provider_to_tegra_mc(data);
 	const struct tegra_mc_client *client;
diff --git a/drivers/memory/tegra/tegra186-emc.c b/drivers/memory/tegra/tegra186-emc.c
index fcd4aea48bda..57d9ae12fcfe 100644
--- a/drivers/memory/tegra/tegra186-emc.c
+++ b/drivers/memory/tegra/tegra186-emc.c
@@ -236,7 +236,7 @@  static int tegra_emc_icc_set_bw(struct icc_node *src, struct icc_node *dst)
 }
 
 static struct icc_node *
-tegra_emc_of_icc_xlate(struct of_phandle_args *spec, void *data)
+tegra_emc_of_icc_xlate(const struct of_phandle_args *spec, void *data)
 {
 	struct icc_provider *provider = data;
 	struct icc_node *node;
diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index fd595c851a27..97cf59523b0b 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -950,7 +950,7 @@  to_tegra_emc_provider(struct icc_provider *provider)
 }
 
 static struct icc_node_data *
-emc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+emc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct icc_provider *provider = data;
 	struct icc_node_data *ndata;
diff --git a/drivers/memory/tegra/tegra20.c b/drivers/memory/tegra/tegra20.c
index aa4b97d5e732..a3022e715dee 100644
--- a/drivers/memory/tegra/tegra20.c
+++ b/drivers/memory/tegra/tegra20.c
@@ -390,7 +390,7 @@  static int tegra20_mc_icc_aggreate(struct icc_node *node, u32 tag, u32 avg_bw,
 }
 
 static struct icc_node_data *
-tegra20_mc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+tegra20_mc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct tegra_mc *mc = icc_provider_to_tegra_mc(data);
 	unsigned int i, idx = spec->args[0];
diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c
index 9eae25c57ec6..d7b0a23c2d7d 100644
--- a/drivers/memory/tegra/tegra30-emc.c
+++ b/drivers/memory/tegra/tegra30-emc.c
@@ -1468,7 +1468,7 @@  to_tegra_emc_provider(struct icc_provider *provider)
 }
 
 static struct icc_node_data *
-emc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+emc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct icc_provider *provider = data;
 	struct icc_node_data *ndata;
diff --git a/drivers/memory/tegra/tegra30.c b/drivers/memory/tegra/tegra30.c
index 06f8b35e0a14..d3e685c8431f 100644
--- a/drivers/memory/tegra/tegra30.c
+++ b/drivers/memory/tegra/tegra30.c
@@ -1332,7 +1332,7 @@  static int tegra30_mc_icc_aggreate(struct icc_node *node, u32 tag, u32 avg_bw,
 }
 
 static struct icc_node_data *
-tegra30_mc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
+tegra30_mc_of_icc_xlate_extended(const struct of_phandle_args *spec, void *data)
 {
 	struct tegra_mc *mc = icc_provider_to_tegra_mc(data);
 	const struct tegra_mc_client *client;
diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
index 7ba183f221f1..f5aef8784692 100644
--- a/include/linux/interconnect-provider.h
+++ b/include/linux/interconnect-provider.h
@@ -36,7 +36,7 @@  struct icc_onecell_data {
 	struct icc_node *nodes[] __counted_by(num_nodes);
 };
 
-struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec,
+struct icc_node *of_icc_xlate_onecell(const struct of_phandle_args *spec,
 				      void *data);
 
 /**
@@ -65,8 +65,9 @@  struct icc_provider {
 			 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
 	void (*pre_aggregate)(struct icc_node *node);
 	int (*get_bw)(struct icc_node *node, u32 *avg, u32 *peak);
-	struct icc_node* (*xlate)(struct of_phandle_args *spec, void *data);
-	struct icc_node_data* (*xlate_extended)(struct of_phandle_args *spec, void *data);
+	struct icc_node* (*xlate)(const struct of_phandle_args *spec, void *data);
+	struct icc_node_data* (*xlate_extended)(const struct of_phandle_args *spec,
+						void *data);
 	struct device		*dev;
 	int			users;
 	bool			inter_set;
@@ -124,7 +125,7 @@  int icc_nodes_remove(struct icc_provider *provider);
 void icc_provider_init(struct icc_provider *provider);
 int icc_provider_register(struct icc_provider *provider);
 void icc_provider_deregister(struct icc_provider *provider);
-struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec);
+struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec);
 void icc_sync_state(struct device *dev);
 
 #else
@@ -171,7 +172,7 @@  static inline int icc_provider_register(struct icc_provider *provider)
 
 static inline void icc_provider_deregister(struct icc_provider *provider) { }
 
-static inline struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec)
+static inline struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec)
 {
 	return ERR_PTR(-ENOTSUPP);
 }
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index af1d73a7f0cd..6ee4c59db620 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -146,13 +146,14 @@  struct tegra_mc_icc_ops {
 	int (*set)(struct icc_node *src, struct icc_node *dst);
 	int (*aggregate)(struct icc_node *node, u32 tag, u32 avg_bw,
 			 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
-	struct icc_node* (*xlate)(struct of_phandle_args *spec, void *data);
-	struct icc_node_data *(*xlate_extended)(struct of_phandle_args *spec,
+	struct icc_node* (*xlate)(const struct of_phandle_args *spec, void *data);
+	struct icc_node_data *(*xlate_extended)(const struct of_phandle_args *spec,
 						void *data);
 	int (*get_bw)(struct icc_node *node, u32 *avg, u32 *peak);
 };
 
-struct icc_node *tegra_mc_icc_xlate(struct of_phandle_args *spec, void *data);
+struct icc_node *tegra_mc_icc_xlate(const struct of_phandle_args *spec,
+				    void *data);
 extern const struct tegra_mc_icc_ops tegra_mc_icc_ops;
 
 struct tegra_mc_ops {