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hte: Changes for v6.7-rc1

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The changes for the hte/timestamp subsystem include the following:
 - Improve comments in the translate function
 - Reflect the GPIOLIB API changes during calculation of the GPIO base
 - Improve error handling in Tegra test and provider drivers
 - Improve code to set the line name
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Merge tag 'for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux

Pull hte/timestamp updates from Dipen Patel:

 - Improve comments in the translate function

 - Reflect the GPIOLIB API changes during calculation of the GPIO base

 - Improve error handling in Tegra test and provider drivers

 - Improve code to set the line name

* tag 'for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux:
  hte: Use kasprintf() instead of fixed buffer formatting
  hte: tegra: Fix missing error code in tegra_hte_test_probe()
  hte: tegra194: Switch to LATE_SIMPLE_DEV_PM_OPS()
  hte: tegra194: Remove redundant dev_err()
  hte: tegra194: improve the GPIO-related comment
  hte: allow building modules with COMPILE_TEST enabled
  hte: Annotate struct hte_device with __counted_by
This commit is contained in:
Linus Torvalds 2023-10-31 18:32:51 -10:00
commit c528943593
4 changed files with 23 additions and 26 deletions
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4
drivers/hte/Kconfig
View file

@ -16,7 +16,7 @@ if HTE
config HTE_TEGRA194
tristate "NVIDIA Tegra194 HTE Support"
depends on ARCH_TEGRA_194_SOC
depends on (ARCH_TEGRA_194_SOC || COMPILE_TEST)
depends on GPIOLIB
help
Enable this option for integrated hardware timestamping engine also
@ -26,7 +26,7 @@ config HTE_TEGRA194
config HTE_TEGRA194_TEST
tristate "NVIDIA Tegra194 HTE Test"
depends on HTE_TEGRA194
depends on (HTE_TEGRA194 || COMPILE_TEST)
help
The NVIDIA Tegra194 GTE test driver demonstrates how to use HTE
framework to timestamp GPIO and LIC IRQ lines.

4
drivers/hte/hte-tegra194-test.c
View file

@ -153,8 +153,10 @@ static int tegra_hte_test_probe(struct platform_device *pdev)
}
cnt = of_hte_req_count(hte.pdev);
if (cnt < 0)
if (cnt < 0) {
ret = cnt;
goto free_irq;
}
dev_info(&pdev->dev, "Total requested lines:%d\n", cnt);

26
drivers/hte/hte-tegra194.c
View file

@ -407,12 +407,15 @@ static int tegra_hte_line_xlate(struct hte_chip *gc,
return -EINVAL;
/*
* GPIO consumers can access GPIOs in two ways:
*
* There are two paths GPIO consumers can take as follows:
* 1) The consumer (gpiolib-cdev for example) which uses GPIO global
* number which gets assigned run time.
* 2) The consumer passing GPIO from the DT which is assigned
* statically for example by using TEGRA194_AON_GPIO gpio DT binding.
* 1) Using the global GPIO numberspace.
*
* This is the old, now DEPRECATED method and should not be used in
* new code. TODO: Check if tegra is even concerned by this.
*
* 2) Using GPIO descriptors that can be assigned to consumer devices
* using device-tree, ACPI or lookup tables.
*
* The code below addresses both the consumer use cases and maps into
* HTE/GTE namespace.
@ -725,10 +728,8 @@ static int tegra_hte_probe(struct platform_device *pdev)
return -ENOMEM;
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
dev_err_probe(dev, ret, "failed to get irq\n");
if (ret < 0)
return ret;
}
hte_dev->hte_irq = ret;
ret = devm_request_irq(dev, hte_dev->hte_irq, tegra_hte_isr, 0,
dev_name(dev), hte_dev);
@ -811,7 +812,7 @@ static int tegra_hte_probe(struct platform_device *pdev)
return 0;
}
static int __maybe_unused tegra_hte_resume_early(struct device *dev)
static int tegra_hte_resume_early(struct device *dev)
{
u32 i;
struct tegra_hte_soc *gs = dev_get_drvdata(dev);
@ -832,7 +833,7 @@ static int __maybe_unused tegra_hte_resume_early(struct device *dev)
return 0;
}
static int __maybe_unused tegra_hte_suspend_late(struct device *dev)
static int tegra_hte_suspend_late(struct device *dev)
{
u32 i;
struct tegra_hte_soc *gs = dev_get_drvdata(dev);
@ -852,15 +853,14 @@ static int __maybe_unused tegra_hte_suspend_late(struct device *dev)
}
static const struct dev_pm_ops tegra_hte_pm = {
SET_LATE_SYSTEM_SLEEP_PM_OPS(tegra_hte_suspend_late,
tegra_hte_resume_early)
LATE_SYSTEM_SLEEP_PM_OPS(tegra_hte_suspend_late, tegra_hte_resume_early)
};
static struct platform_driver tegra_hte_driver = {
.probe = tegra_hte_probe,
.driver = {
.name = "tegra_hte",
.pm = &tegra_hte_pm,
.pm = pm_sleep_ptr(&tegra_hte_pm),
.of_match_table = tegra_hte_of_match,
},
};

13
drivers/hte/hte.c
View file

@ -17,8 +17,6 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#define HTE_TS_NAME_LEN 10
/* Global list of the HTE devices */
static DEFINE_SPINLOCK(hte_lock);
static LIST_HEAD(hte_devices);
@ -88,7 +86,7 @@ struct hte_device {
struct list_head list;
struct hte_chip *chip;
struct module *owner;
struct hte_ts_info ei[];
struct hte_ts_info ei[] __counted_by(nlines);
};
#ifdef CONFIG_DEBUG_FS
@ -389,13 +387,10 @@ static int __hte_req_ts(struct hte_ts_desc *desc, hte_ts_cb_t cb,
atomic_inc(&gdev->ts_req);
if (desc->attr.name)
ei->line_name = NULL;
if (!desc->attr.name) {
ei->line_name = kzalloc(HTE_TS_NAME_LEN, GFP_KERNEL);
if (ei->line_name)
scnprintf(ei->line_name, HTE_TS_NAME_LEN, "ts_%u",
desc->attr.line_id);
}
else
ei->line_name = kasprintf(GFP_KERNEL, "ts_%u", desc->attr.line_id);
hte_ts_dbgfs_init(desc->attr.name == NULL ?
ei->line_name : desc->attr.name, ei);