aboutsummaryrefslogtreecommitdiff
path: root/drivers/reset/core.c
diff options
context:
space:
mode:
authorLinus Torvalds <[email protected]>2024-11-20 15:40:54 -0800
committerLinus Torvalds <[email protected]>2024-11-20 15:40:54 -0800
commit14d0e1a09fe97a7524ff36baa695900cb0c10c23 (patch)
treeaccca02adb7453b2cec02cb9435b2678c243d6aa /drivers/reset/core.c
parent9c39d5ab450f7181775957000f4aff33bfef9f7b (diff)
parentb77587ac51d2fe4b9d5751662ddc083d19153662 (diff)
Merge tag 'soc-drivers-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann: "Nothing particular important in the SoC driver updates, just the usual improvements to for drivers/soc and a couple of subsystems that don't fit anywhere else: - The largest set of updates is for Qualcomm SoC drivers, extending the set of supported features for additional SoCs in the QSEECOM, LLCC and socinfo drivers.a - The ti_sci firmware driver gains support for power managment - The drivers/reset subsystem sees a rework of the microchip sparx5 and amlogic reset drivers to support additional chips, plus a few minor updates on other platforms - The SCMI firmware interface driver gains support for two protocol extensions, allowing more flexible use of the shared memory area and new DT binding properties for configurability. - Mediatek SoC drivers gain support for power managment on the MT8188 SoC and a new driver for DVFS. - The AMD/Xilinx ZynqMP SoC drivers gain support for system reboot and a few bugfixes - The Hisilicon Kunpeng HCCS driver gains support for configuring lanes through sysfs Finally, there are cleanups and minor fixes for drivers/{soc, bus, memory}, including changing back the .remove_new callback to .remove, as well as a few other updates for freescale (powerpc) soc drivers, NXP i.MX soc drivers, cznic turris platform driver, memory controller drviers, TI OMAP SoC drivers, and Tegra firmware drivers" * tag 'soc-drivers-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (116 commits) soc: fsl: cpm1: qmc: Set the ret error code on platform_get_irq() failure soc: fsl: rcpm: fix missing of_node_put() in copy_ippdexpcr1_setting() soc: fsl: cpm1: tsa: switch to for_each_available_child_of_node_scoped() platform: cznic: turris-omnia-mcu: Rename variable holding GPIO line names platform: cznic: turris-omnia-mcu: Document the driver private data structure firmware: turris-mox-rwtm: Document the driver private data structure bus: Switch back to struct platform_driver::remove() soc: qcom: ice: Remove the device_link field in qcom_ice drm/msm/adreno: Setup SMMU aparture for per-process page table firmware: qcom: scm: Introduce CP_SMMU_APERTURE_ID firmware: arm_scpi: Check the DVFS OPP count returned by the firmware soc: qcom: socinfo: add IPQ5424/IPQ5404 SoC ID dt-bindings: arm: qcom,ids: add SoC ID for IPQ5424/IPQ5404 soc: qcom: llcc: Flip the manual slice configuration condition dt-bindings: firmware: qcom,scm: Document sm8750 SCM firmware: qcom: uefisecapp: Allow X1E Devkit devices misc: lan966x_pci: Fix dtc warn 'Missing interrupt-parent' misc: lan966x_pci: Fix dtc warns 'missing or empty reg/ranges property' soc: qcom: llcc: Add LLCC configuration for the QCS8300 platform dt-bindings: cache: qcom,llcc: Document the QCS8300 LLCC ...
Diffstat (limited to 'drivers/reset/core.c')
-rw-r--r--drivers/reset/core.c119
1 files changed, 86 insertions, 33 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 4d509d41456a..22f67fc77ae5 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -773,12 +773,19 @@ EXPORT_SYMBOL_GPL(reset_control_bulk_release);
static struct reset_control *
__reset_control_get_internal(struct reset_controller_dev *rcdev,
- unsigned int index, bool shared, bool acquired)
+ unsigned int index, enum reset_control_flags flags)
{
+ bool shared = flags & RESET_CONTROL_FLAGS_BIT_SHARED;
+ bool acquired = flags & RESET_CONTROL_FLAGS_BIT_ACQUIRED;
struct reset_control *rstc;
lockdep_assert_held(&reset_list_mutex);
+ /* Expect callers to filter out OPTIONAL and DEASSERTED bits */
+ if (WARN_ON(flags & ~(RESET_CONTROL_FLAGS_BIT_SHARED |
+ RESET_CONTROL_FLAGS_BIT_ACQUIRED)))
+ return ERR_PTR(-EINVAL);
+
list_for_each_entry(rstc, &rcdev->reset_control_head, list) {
if (rstc->id == index) {
/*
@@ -994,8 +1001,9 @@ static struct reset_controller_dev *__reset_find_rcdev(const struct of_phandle_a
struct reset_control *
__of_reset_control_get(struct device_node *node, const char *id, int index,
- bool shared, bool optional, bool acquired)
+ enum reset_control_flags flags)
{
+ bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
bool gpio_fallback = false;
struct reset_control *rstc;
struct reset_controller_dev *rcdev;
@@ -1059,8 +1067,10 @@ __of_reset_control_get(struct device_node *node, const char *id, int index,
goto out_unlock;
}
+ flags &= ~RESET_CONTROL_FLAGS_BIT_OPTIONAL;
+
/* reset_list_mutex also protects the rcdev's reset_control list */
- rstc = __reset_control_get_internal(rcdev, rstc_id, shared, acquired);
+ rstc = __reset_control_get_internal(rcdev, rstc_id, flags);
out_unlock:
mutex_unlock(&reset_list_mutex);
@@ -1091,8 +1101,9 @@ __reset_controller_by_name(const char *name)
static struct reset_control *
__reset_control_get_from_lookup(struct device *dev, const char *con_id,
- bool shared, bool optional, bool acquired)
+ enum reset_control_flags flags)
{
+ bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
const struct reset_control_lookup *lookup;
struct reset_controller_dev *rcdev;
const char *dev_id = dev_name(dev);
@@ -1116,9 +1127,11 @@ __reset_control_get_from_lookup(struct device *dev, const char *con_id,
return ERR_PTR(-EPROBE_DEFER);
}
+ flags &= ~RESET_CONTROL_FLAGS_BIT_OPTIONAL;
+
rstc = __reset_control_get_internal(rcdev,
lookup->index,
- shared, acquired);
+ flags);
mutex_unlock(&reset_list_mutex);
break;
}
@@ -1133,30 +1146,29 @@ __reset_control_get_from_lookup(struct device *dev, const char *con_id,
}
struct reset_control *__reset_control_get(struct device *dev, const char *id,
- int index, bool shared, bool optional,
- bool acquired)
+ int index, enum reset_control_flags flags)
{
+ bool shared = flags & RESET_CONTROL_FLAGS_BIT_SHARED;
+ bool acquired = flags & RESET_CONTROL_FLAGS_BIT_ACQUIRED;
+
if (WARN_ON(shared && acquired))
return ERR_PTR(-EINVAL);
if (dev->of_node)
- return __of_reset_control_get(dev->of_node, id, index, shared,
- optional, acquired);
+ return __of_reset_control_get(dev->of_node, id, index, flags);
- return __reset_control_get_from_lookup(dev, id, shared, optional,
- acquired);
+ return __reset_control_get_from_lookup(dev, id, flags);
}
EXPORT_SYMBOL_GPL(__reset_control_get);
int __reset_control_bulk_get(struct device *dev, int num_rstcs,
struct reset_control_bulk_data *rstcs,
- bool shared, bool optional, bool acquired)
+ enum reset_control_flags flags)
{
int ret, i;
for (i = 0; i < num_rstcs; i++) {
- rstcs[i].rstc = __reset_control_get(dev, rstcs[i].id, 0,
- shared, optional, acquired);
+ rstcs[i].rstc = __reset_control_get(dev, rstcs[i].id, 0, flags);
if (IS_ERR(rstcs[i].rstc)) {
ret = PTR_ERR(rstcs[i].rstc);
goto err;
@@ -1224,23 +1236,46 @@ static void devm_reset_control_release(struct device *dev, void *res)
reset_control_put(*(struct reset_control **)res);
}
+static void devm_reset_control_release_deasserted(struct device *dev, void *res)
+{
+ struct reset_control *rstc = *(struct reset_control **)res;
+
+ reset_control_assert(rstc);
+ reset_control_put(rstc);
+}
+
struct reset_control *
__devm_reset_control_get(struct device *dev, const char *id, int index,
- bool shared, bool optional, bool acquired)
+ enum reset_control_flags flags)
{
struct reset_control **ptr, *rstc;
+ bool deasserted = flags & RESET_CONTROL_FLAGS_BIT_DEASSERTED;
- ptr = devres_alloc(devm_reset_control_release, sizeof(*ptr),
+ ptr = devres_alloc(deasserted ? devm_reset_control_release_deasserted :
+ devm_reset_control_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
- rstc = __reset_control_get(dev, id, index, shared, optional, acquired);
+ flags &= ~RESET_CONTROL_FLAGS_BIT_DEASSERTED;
+
+ rstc = __reset_control_get(dev, id, index, flags);
if (IS_ERR_OR_NULL(rstc)) {
devres_free(ptr);
return rstc;
}
+ if (deasserted) {
+ int ret;
+
+ ret = reset_control_deassert(rstc);
+ if (ret) {
+ reset_control_put(rstc);
+ devres_free(ptr);
+ return ERR_PTR(ret);
+ }
+ }
+
*ptr = rstc;
devres_add(dev, ptr);
@@ -1260,24 +1295,45 @@ static void devm_reset_control_bulk_release(struct device *dev, void *res)
reset_control_bulk_put(devres->num_rstcs, devres->rstcs);
}
+static void devm_reset_control_bulk_release_deasserted(struct device *dev, void *res)
+{
+ struct reset_control_bulk_devres *devres = res;
+
+ reset_control_bulk_assert(devres->num_rstcs, devres->rstcs);
+ reset_control_bulk_put(devres->num_rstcs, devres->rstcs);
+}
+
int __devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
struct reset_control_bulk_data *rstcs,
- bool shared, bool optional, bool acquired)
+ enum reset_control_flags flags)
{
struct reset_control_bulk_devres *ptr;
+ bool deasserted = flags & RESET_CONTROL_FLAGS_BIT_DEASSERTED;
int ret;
- ptr = devres_alloc(devm_reset_control_bulk_release, sizeof(*ptr),
+ ptr = devres_alloc(deasserted ? devm_reset_control_bulk_release_deasserted :
+ devm_reset_control_bulk_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return -ENOMEM;
- ret = __reset_control_bulk_get(dev, num_rstcs, rstcs, shared, optional, acquired);
+ flags &= ~RESET_CONTROL_FLAGS_BIT_DEASSERTED;
+
+ ret = __reset_control_bulk_get(dev, num_rstcs, rstcs, flags);
if (ret < 0) {
devres_free(ptr);
return ret;
}
+ if (deasserted) {
+ ret = reset_control_bulk_deassert(num_rstcs, rstcs);
+ if (ret) {
+ reset_control_bulk_put(num_rstcs, rstcs);
+ devres_free(ptr);
+ return ret;
+ }
+ }
+
ptr->num_rstcs = num_rstcs;
ptr->rstcs = rstcs;
devres_add(dev, ptr);
@@ -1298,6 +1354,7 @@ EXPORT_SYMBOL_GPL(__devm_reset_control_bulk_get);
*/
int __device_reset(struct device *dev, bool optional)
{
+ enum reset_control_flags flags;
struct reset_control *rstc;
int ret;
@@ -1313,7 +1370,8 @@ int __device_reset(struct device *dev, bool optional)
}
#endif
- rstc = __reset_control_get(dev, NULL, 0, 0, optional, true);
+ flags = optional ? RESET_CONTROL_OPTIONAL_EXCLUSIVE : RESET_CONTROL_EXCLUSIVE;
+ rstc = __reset_control_get(dev, NULL, 0, flags);
if (IS_ERR(rstc))
return PTR_ERR(rstc);
@@ -1356,17 +1414,14 @@ static int of_reset_control_get_count(struct device_node *node)
* device node.
*
* @np: device node for the device that requests the reset controls array
- * @shared: whether reset controls are shared or not
- * @optional: whether it is optional to get the reset controls
- * @acquired: only one reset control may be acquired for a given controller
- * and ID
+ * @flags: whether reset controls are shared, optional, acquired
*
* Returns pointer to allocated reset_control on success or error on failure
*/
struct reset_control *
-of_reset_control_array_get(struct device_node *np, bool shared, bool optional,
- bool acquired)
+of_reset_control_array_get(struct device_node *np, enum reset_control_flags flags)
{
+ bool optional = flags & RESET_CONTROL_FLAGS_BIT_OPTIONAL;
struct reset_control_array *resets;
struct reset_control *rstc;
int num, i;
@@ -1381,8 +1436,7 @@ of_reset_control_array_get(struct device_node *np, bool shared, bool optional,
resets->num_rstcs = num;
for (i = 0; i < num; i++) {
- rstc = __of_reset_control_get(np, NULL, i, shared, optional,
- acquired);
+ rstc = __of_reset_control_get(np, NULL, i, flags);
if (IS_ERR(rstc))
goto err_rst;
resets->rstc[i] = rstc;
@@ -1407,8 +1461,7 @@ EXPORT_SYMBOL_GPL(of_reset_control_array_get);
* devm_reset_control_array_get - Resource managed reset control array get
*
* @dev: device that requests the list of reset controls
- * @shared: whether reset controls are shared or not
- * @optional: whether it is optional to get the reset controls
+ * @flags: whether reset controls are shared, optional, acquired
*
* The reset control array APIs are intended for a list of resets
* that just have to be asserted or deasserted, without any
@@ -1417,7 +1470,7 @@ EXPORT_SYMBOL_GPL(of_reset_control_array_get);
* Returns pointer to allocated reset_control on success or error on failure
*/
struct reset_control *
-devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
+devm_reset_control_array_get(struct device *dev, enum reset_control_flags flags)
{
struct reset_control **ptr, *rstc;
@@ -1426,7 +1479,7 @@ devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
if (!ptr)
return ERR_PTR(-ENOMEM);
- rstc = of_reset_control_array_get(dev->of_node, shared, optional, true);
+ rstc = of_reset_control_array_get(dev->of_node, flags);
if (IS_ERR_OR_NULL(rstc)) {
devres_free(ptr);
return rstc;