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hwspinlock updates for v6.9

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This provides some code cleanup for the OMAP hwspinlock driver.
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Merge tag 'hwlock-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

Pull hwspinlock updates from Bjorn Andersson:
 "Some code cleanup for the OMAP hwspinlock driver"

* tag 'hwlock-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
  hwspinlock: omap: Use index to get hwspinlock pointer
  hwspinlock: omap: Use devm_hwspin_lock_register() helper
  hwspinlock: omap: Use devm_pm_runtime_enable() helper
  hwspinlock: omap: Remove unneeded check for OF node
This commit is contained in:
Linus Torvalds 2024-03-21 10:49:54 -07:00
commit 2ac2b1665d
1 changed files with 10 additions and 47 deletions
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57
drivers/hwspinlock/omap_hwspinlock.c
View File

@ -74,17 +74,12 @@ static const struct hwspinlock_ops omap_hwspinlock_ops = {
static int omap_hwspinlock_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct hwspinlock_device *bank;
struct hwspinlock *hwlock;
void __iomem *io_base;
int num_locks, i, ret;
/* Only a single hwspinlock block device is supported */
int base_id = 0;
if (!node)
return -ENODEV;
io_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(io_base))
return PTR_ERR(io_base);
@ -93,10 +88,10 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
* make sure the module is enabled and clocked before reading
* the module SYSSTATUS register
*/
pm_runtime_enable(&pdev->dev);
devm_pm_runtime_enable(&pdev->dev);
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0)
goto runtime_err;
return ret;
/* Determine number of locks */
i = readl(io_base + SYSSTATUS_OFFSET);
@ -108,55 +103,24 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
*/
ret = pm_runtime_put(&pdev->dev);
if (ret < 0)
goto runtime_err;
return ret;
/* one of the four lsb's must be set, and nothing else */
if (hweight_long(i & 0xf) != 1 || i > 8) {
ret = -EINVAL;
goto runtime_err;
}
if (hweight_long(i & 0xf) != 1 || i > 8)
return -EINVAL;
num_locks = i * 32; /* actual number of locks in this device */
bank = devm_kzalloc(&pdev->dev, struct_size(bank, lock, num_locks),
GFP_KERNEL);
if (!bank) {
ret = -ENOMEM;
goto runtime_err;
}
if (!bank)
return -ENOMEM;
platform_set_drvdata(pdev, bank);
for (i = 0; i < num_locks; i++)
bank->lock[i].priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
for (i = 0, hwlock = &bank->lock[0]; i < num_locks; i++, hwlock++)
hwlock->priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
return devm_hwspin_lock_register(&pdev->dev, bank, &omap_hwspinlock_ops,
base_id, num_locks);
if (ret)
goto runtime_err;
dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n",
num_locks);
return 0;
runtime_err:
pm_runtime_disable(&pdev->dev);
return ret;
}
static void omap_hwspinlock_remove(struct platform_device *pdev)
{
struct hwspinlock_device *bank = platform_get_drvdata(pdev);
int ret;
ret = hwspin_lock_unregister(bank);
if (ret) {
dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret);
return;
}
pm_runtime_disable(&pdev->dev);
}
static const struct of_device_id omap_hwspinlock_of_match[] = {
@ -169,7 +133,6 @@ MODULE_DEVICE_TABLE(of, omap_hwspinlock_of_match);
static struct platform_driver omap_hwspinlock_driver = {
.probe = omap_hwspinlock_probe,
.remove_new = omap_hwspinlock_remove,
.driver = {
.name = "omap_hwspinlock",
.of_match_table = omap_hwspinlock_of_match,