diff options
author | Linus Torvalds <[email protected]> | 2024-11-20 15:40:54 -0800 |
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committer | Linus Torvalds <[email protected]> | 2024-11-20 15:40:54 -0800 |
commit | 14d0e1a09fe97a7524ff36baa695900cb0c10c23 (patch) | |
tree | accca02adb7453b2cec02cb9435b2678c243d6aa /drivers/reset/core.c | |
parent | 9c39d5ab450f7181775957000f4aff33bfef9f7b (diff) | |
parent | b77587ac51d2fe4b9d5751662ddc083d19153662 (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.c | 119 |
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; |