![Linus Torvalds](/assets/img/avatar_default.png)
- Modify the driver core and the USB subsystem to allow USB devices to stay suspended over system suspend/resume cycles if they have been runtime-suspended already beforehand and fix some bugs on top of these changes (Tomeu Vizoso, Rafael Wysocki). - Update ACPICA to upstream revision 20160108, including updates of the ACPICA's copyright notices, a code fixup resulting from a regression fix that was necessary in the upstream code only (the regression fixed by it has never been present in Linux) and a compiler warning fix (Bob Moore, Lv Zheng). - Fix a recent regression in the cpuidle menu governor that broke it on practically all architectures other than x86 and make a couple of optimizations on top of that fix (Rafael Wysocki). - Clean up the selection of cpuidle governors depending on whether or not the kernel is configured for tickless systems (Jean Delvare). - Revert a recent commit that introduced a regression in the ACPI backlight driver, address the problem it attempted to fix in a different way and revert one more cosmetic change depending on the problematic commit (Hans de Goede). - Add two more ACPI backlight quirks (Hans de Goede). - Fix a few minor problems in the core devfreq code, clean it up a bit and update the MAINTAINERS information related to it (Chanwoo Choi, MyungJoo Ham). - Improve an error message in the ACPI fan driver (Andy Lutomirski). - Fix a recent build regression in the cpupower tool (Shreyas Prabhu). / -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABCAAGBQJWoCQ4AAoJEILEb/54YlRxLscQALEFVKSRnNaco72OqqRZs9Bu 1RI6TgHTpZxR+Ef0+QWqE1QMnDwfImGhKDbSRm/t3S2sMYYZbAOL8cu4y6GmkBv4 bOon/f9WEoPlQCFoo/6U4u8H45rNT5W9zX5+Bva8x+4Wu3n2J1QdvirnS5JHeHe1 o6tGLaHuZXSwX8SLnCk8gJYK1VhATxbubJtpcVtvlnAhO11qUAwsscCrkUmB60i7 5hLyrZb06hoa/hZVcIefGFuSd9qPhzDMQE2M20EohQ7UVkNJQdY9QNHMqCk2P42T nMWCNSwGnwfiO1p9ByXqunOFBCmyL7P+KV/DHsz6TFCVjz+jeG53Kqey9SkSJ/2W iaAE80K9MfOMvg8j7rib6fTn5uXBwRfqdeUDF/Hr64QqJoRn3R2LX4HmZe4L8ufb zA1rece67o8FD+7p7GkNbT3rPV/kA62tn/moFk446X5N+b261Kz90t1DVci8kRVf k+1gcvEdqO0GPpEHoirfXrBvQFixqkXakKj4r2aAob/DldQeLX7CkOUuRRJ1ykec bxwI9R0v8MlVe5rDxg+rPB0I9EFxRDmxqxpU5j0MRWxKnMRzLvBtHuk8YNVS/eU1 xwyJOGcwF6yI0PaCFggPqmhebSrWLE7wJxaK+3bC+yiDTvHYPjB+4MfQrmkRAwwM azgb+ZgXDYx5wXeb8EjB =bKJ9 -----END PGP SIGNATURE----- Merge tag 'pm+acpi-4.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more power management and ACPI updates from Rafael Wysocki: "This includes fixes on top of the previous batch of PM+ACPI updates and some new material as well. From the new material perspective the most significant are the driver core changes that should allow USB devices to stay suspended over system suspend/resume cycles if they have been runtime-suspended already beforehand. Apart from that, ACPICA is updated to upstream revision 20160108 (cosmetic mostly, but including one fixup on top of the previous ACPICA update) and there are some devfreq updates the didn't make it before (due to timing). A few recent regressions are fixed, most importantly in the cpuidle menu governor and in the ACPI backlight driver and some x86 platform drivers depending on it. Some more bugs are fixed and cleanups are made on top of that. Specifics: - Modify the driver core and the USB subsystem to allow USB devices to stay suspended over system suspend/resume cycles if they have been runtime-suspended already beforehand and fix some bugs on top of these changes (Tomeu Vizoso, Rafael Wysocki). - Update ACPICA to upstream revision 20160108, including updates of the ACPICA's copyright notices, a code fixup resulting from a regression fix that was necessary in the upstream code only (the regression fixed by it has never been present in Linux) and a compiler warning fix (Bob Moore, Lv Zheng). - Fix a recent regression in the cpuidle menu governor that broke it on practically all architectures other than x86 and make a couple of optimizations on top of that fix (Rafael Wysocki). - Clean up the selection of cpuidle governors depending on whether or not the kernel is configured for tickless systems (Jean Delvare). - Revert a recent commit that introduced a regression in the ACPI backlight driver, address the problem it attempted to fix in a different way and revert one more cosmetic change depending on the problematic commit (Hans de Goede). - Add two more ACPI backlight quirks (Hans de Goede). - Fix a few minor problems in the core devfreq code, clean it up a bit and update the MAINTAINERS information related to it (Chanwoo Choi, MyungJoo Ham). - Improve an error message in the ACPI fan driver (Andy Lutomirski). - Fix a recent build regression in the cpupower tool (Shreyas Prabhu)" * tag 'pm+acpi-4.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) cpuidle: menu: Avoid pointless checks in menu_select() sched / idle: Drop default_idle_call() fallback from call_cpuidle() cpupower: Fix build error in cpufreq-info cpuidle: Don't enable all governors by default cpuidle: Default to ladder governor on ticking systems time: nohz: Expose tick_nohz_enabled ACPICA: Update version to 20160108 ACPICA: Silence a -Wbad-function-cast warning when acpi_uintptr_t is 'uintptr_t' ACPICA: Additional 2016 copyright changes ACPICA: Reduce regression fix divergence from upstream ACPICA ACPI / video: Add disable_backlight_sysfs_if quirk for the Toshiba Satellite R830 ACPI / video: Revert "thinkpad_acpi: Use acpi_video_handles_brightness_key_presses()" ACPI / video: Document acpi_video_handles_brightness_key_presses() a bit ACPI / video: Fix using an uninitialized mutex / list_head in acpi_video_handles_brightness_key_presses() ACPI / video: Revert "ACPI / video: driver must be registered before checking for keypresses" ACPI / fan: Improve acpi_device_update_power error message ACPI / video: Add disable_backlight_sysfs_if quirk for the Toshiba Portege R700 cpuidle: menu: Fix menu_select() for CPUIDLE_DRIVER_STATE_START == 0 MAINTAINERS: Add devfreq-event entry MAINTAINERS: Add missing git repository and directory for devfreq ...
927 lines
24 KiB
C
927 lines
24 KiB
C
/*
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* omap_device implementation
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*
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* Copyright (C) 2009-2010 Nokia Corporation
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* Paul Walmsley, Kevin Hilman
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*
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* Developed in collaboration with (alphabetical order): Benoit
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* Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram
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* Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
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* Woodruff
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This code provides a consistent interface for OMAP device drivers
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* to control power management and interconnect properties of their
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* devices.
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*
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* In the medium- to long-term, this code should be implemented as a
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* proper omap_bus/omap_device in Linux, no more platform_data func
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* pointers
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*
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*
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/pm_domain.h>
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include <linux/notifier.h>
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#include "common.h"
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#include "soc.h"
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#include "omap_device.h"
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#include "omap_hwmod.h"
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/* Private functions */
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static void _add_clkdev(struct omap_device *od, const char *clk_alias,
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const char *clk_name)
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{
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struct clk *r;
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int rc;
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if (!clk_alias || !clk_name)
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return;
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dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);
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r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
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if (!IS_ERR(r)) {
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dev_dbg(&od->pdev->dev,
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"alias %s already exists\n", clk_alias);
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clk_put(r);
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return;
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}
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rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev), clk_name, NULL);
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if (rc) {
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if (rc == -ENODEV || rc == -ENOMEM)
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dev_err(&od->pdev->dev,
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"clkdev_alloc for %s failed\n", clk_alias);
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else
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dev_err(&od->pdev->dev,
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"clk_get for %s failed\n", clk_name);
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}
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}
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/**
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* _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks
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* and main clock
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* @od: struct omap_device *od
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* @oh: struct omap_hwmod *oh
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*
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* For the main clock and every optional clock present per hwmod per
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* omap_device, this function adds an entry in the clkdev table of the
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* form <dev-id=dev_name, con-id=role> if it does not exist already.
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*
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* The function is called from inside omap_device_build_ss(), after
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* omap_device_register.
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*
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* This allows drivers to get a pointer to its optional clocks based on its role
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* by calling clk_get(<dev*>, <role>).
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* In the case of the main clock, a "fck" alias is used.
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*
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* No return value.
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*/
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static void _add_hwmod_clocks_clkdev(struct omap_device *od,
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struct omap_hwmod *oh)
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{
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int i;
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_add_clkdev(od, "fck", oh->main_clk);
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for (i = 0; i < oh->opt_clks_cnt; i++)
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_add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
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}
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/**
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* omap_device_build_from_dt - build an omap_device with multiple hwmods
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* @pdev_name: name of the platform_device driver to use
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* @pdev_id: this platform_device's connection ID
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* @oh: ptr to the single omap_hwmod that backs this omap_device
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* @pdata: platform_data ptr to associate with the platform_device
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* @pdata_len: amount of memory pointed to by @pdata
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*
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* Function for building an omap_device already registered from device-tree
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*
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* Returns 0 or PTR_ERR() on error.
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*/
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static int omap_device_build_from_dt(struct platform_device *pdev)
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{
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struct omap_hwmod **hwmods;
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struct omap_device *od;
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struct omap_hwmod *oh;
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struct device_node *node = pdev->dev.of_node;
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const char *oh_name;
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int oh_cnt, i, ret = 0;
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bool device_active = false;
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oh_cnt = of_property_count_strings(node, "ti,hwmods");
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if (oh_cnt <= 0) {
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dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
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return -ENODEV;
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}
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hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
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if (!hwmods) {
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ret = -ENOMEM;
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goto odbfd_exit;
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}
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for (i = 0; i < oh_cnt; i++) {
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of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
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oh = omap_hwmod_lookup(oh_name);
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if (!oh) {
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dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
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oh_name);
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ret = -EINVAL;
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goto odbfd_exit1;
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}
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hwmods[i] = oh;
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if (oh->flags & HWMOD_INIT_NO_IDLE)
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device_active = true;
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}
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od = omap_device_alloc(pdev, hwmods, oh_cnt);
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if (IS_ERR(od)) {
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dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
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oh_name);
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ret = PTR_ERR(od);
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goto odbfd_exit1;
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}
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/* Fix up missing resource names */
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for (i = 0; i < pdev->num_resources; i++) {
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struct resource *r = &pdev->resource[i];
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if (r->name == NULL)
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r->name = dev_name(&pdev->dev);
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}
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dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain);
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if (device_active) {
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omap_device_enable(pdev);
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pm_runtime_set_active(&pdev->dev);
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}
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odbfd_exit1:
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kfree(hwmods);
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odbfd_exit:
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/* if data/we are at fault.. load up a fail handler */
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if (ret)
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dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain);
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return ret;
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}
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static int _omap_device_notifier_call(struct notifier_block *nb,
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unsigned long event, void *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct omap_device *od;
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switch (event) {
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case BUS_NOTIFY_DEL_DEVICE:
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if (pdev->archdata.od)
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omap_device_delete(pdev->archdata.od);
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break;
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case BUS_NOTIFY_ADD_DEVICE:
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if (pdev->dev.of_node)
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omap_device_build_from_dt(pdev);
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omap_auxdata_legacy_init(dev);
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/* fall through */
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default:
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od = to_omap_device(pdev);
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if (od)
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od->_driver_status = event;
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}
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return NOTIFY_DONE;
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}
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/**
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* _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
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* @od: struct omap_device *od
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*
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* Enable all underlying hwmods. Returns 0.
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*/
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static int _omap_device_enable_hwmods(struct omap_device *od)
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{
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int ret = 0;
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int i;
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for (i = 0; i < od->hwmods_cnt; i++)
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ret |= omap_hwmod_enable(od->hwmods[i]);
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return ret;
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}
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/**
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* _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
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* @od: struct omap_device *od
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*
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* Idle all underlying hwmods. Returns 0.
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*/
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static int _omap_device_idle_hwmods(struct omap_device *od)
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{
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int ret = 0;
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int i;
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for (i = 0; i < od->hwmods_cnt; i++)
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ret |= omap_hwmod_idle(od->hwmods[i]);
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return ret;
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}
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/* Public functions for use by core code */
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/**
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* omap_device_get_context_loss_count - get lost context count
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* @od: struct omap_device *
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*
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* Using the primary hwmod, query the context loss count for this
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* device.
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*
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* Callers should consider context for this device lost any time this
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* function returns a value different than the value the caller got
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* the last time it called this function.
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*
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* If any hwmods exist for the omap_device assoiated with @pdev,
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* return the context loss counter for that hwmod, otherwise return
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* zero.
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*/
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int omap_device_get_context_loss_count(struct platform_device *pdev)
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{
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struct omap_device *od;
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u32 ret = 0;
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od = to_omap_device(pdev);
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if (od->hwmods_cnt)
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ret = omap_hwmod_get_context_loss_count(od->hwmods[0]);
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return ret;
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}
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/**
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* omap_device_count_resources - count number of struct resource entries needed
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* @od: struct omap_device *
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* @flags: Type of resources to include when counting (IRQ/DMA/MEM)
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*
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* Count the number of struct resource entries needed for this
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* omap_device @od. Used by omap_device_build_ss() to determine how
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* much memory to allocate before calling
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* omap_device_fill_resources(). Returns the count.
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*/
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static int omap_device_count_resources(struct omap_device *od,
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unsigned long flags)
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{
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int c = 0;
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int i;
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for (i = 0; i < od->hwmods_cnt; i++)
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c += omap_hwmod_count_resources(od->hwmods[i], flags);
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pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n",
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od->pdev->name, c, od->hwmods_cnt);
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return c;
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}
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/**
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* omap_device_fill_resources - fill in array of struct resource
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* @od: struct omap_device *
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* @res: pointer to an array of struct resource to be filled in
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*
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* Populate one or more empty struct resource pointed to by @res with
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* the resource data for this omap_device @od. Used by
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* omap_device_build_ss() after calling omap_device_count_resources().
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* Ideally this function would not be needed at all. If omap_device
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* replaces platform_device, then we can specify our own
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* get_resource()/ get_irq()/etc functions that use the underlying
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* omap_hwmod information. Or if platform_device is extended to use
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* subarchitecture-specific function pointers, the various
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* platform_device functions can simply call omap_device internal
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* functions to get device resources. Hacking around the existing
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* platform_device code wastes memory. Returns 0.
|
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*/
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static int omap_device_fill_resources(struct omap_device *od,
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struct resource *res)
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{
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int i, r;
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for (i = 0; i < od->hwmods_cnt; i++) {
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r = omap_hwmod_fill_resources(od->hwmods[i], res);
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res += r;
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}
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return 0;
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}
|
|
|
|
/**
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* _od_fill_dma_resources - fill in array of struct resource with dma resources
|
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* @od: struct omap_device *
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* @res: pointer to an array of struct resource to be filled in
|
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*
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* Populate one or more empty struct resource pointed to by @res with
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* the dma resource data for this omap_device @od. Used by
|
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* omap_device_alloc() after calling omap_device_count_resources().
|
|
*
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|
* Ideally this function would not be needed at all. If we have
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* mechanism to get dma resources from DT.
|
|
*
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* Returns 0.
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*/
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static int _od_fill_dma_resources(struct omap_device *od,
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struct resource *res)
|
|
{
|
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int i, r;
|
|
|
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for (i = 0; i < od->hwmods_cnt; i++) {
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r = omap_hwmod_fill_dma_resources(od->hwmods[i], res);
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res += r;
|
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}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* omap_device_alloc - allocate an omap_device
|
|
* @pdev: platform_device that will be included in this omap_device
|
|
* @oh: ptr to the single omap_hwmod that backs this omap_device
|
|
* @pdata: platform_data ptr to associate with the platform_device
|
|
* @pdata_len: amount of memory pointed to by @pdata
|
|
*
|
|
* Convenience function for allocating an omap_device structure and filling
|
|
* hwmods, and resources.
|
|
*
|
|
* Returns an struct omap_device pointer or ERR_PTR() on error;
|
|
*/
|
|
struct omap_device *omap_device_alloc(struct platform_device *pdev,
|
|
struct omap_hwmod **ohs, int oh_cnt)
|
|
{
|
|
int ret = -ENOMEM;
|
|
struct omap_device *od;
|
|
struct resource *res = NULL;
|
|
int i, res_count;
|
|
struct omap_hwmod **hwmods;
|
|
|
|
od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
|
|
if (!od) {
|
|
ret = -ENOMEM;
|
|
goto oda_exit1;
|
|
}
|
|
od->hwmods_cnt = oh_cnt;
|
|
|
|
hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
|
|
if (!hwmods)
|
|
goto oda_exit2;
|
|
|
|
od->hwmods = hwmods;
|
|
od->pdev = pdev;
|
|
|
|
/*
|
|
* Non-DT Boot:
|
|
* Here, pdev->num_resources = 0, and we should get all the
|
|
* resources from hwmod.
|
|
*
|
|
* DT Boot:
|
|
* OF framework will construct the resource structure (currently
|
|
* does for MEM & IRQ resource) and we should respect/use these
|
|
* resources, killing hwmod dependency.
|
|
* If pdev->num_resources > 0, we assume that MEM & IRQ resources
|
|
* have been allocated by OF layer already (through DTB).
|
|
* As preparation for the future we examine the OF provided resources
|
|
* to see if we have DMA resources provided already. In this case
|
|
* there is no need to update the resources for the device, we use the
|
|
* OF provided ones.
|
|
*
|
|
* TODO: Once DMA resource is available from OF layer, we should
|
|
* kill filling any resources from hwmod.
|
|
*/
|
|
if (!pdev->num_resources) {
|
|
/* Count all resources for the device */
|
|
res_count = omap_device_count_resources(od, IORESOURCE_IRQ |
|
|
IORESOURCE_DMA |
|
|
IORESOURCE_MEM);
|
|
} else {
|
|
/* Take a look if we already have DMA resource via DT */
|
|
for (i = 0; i < pdev->num_resources; i++) {
|
|
struct resource *r = &pdev->resource[i];
|
|
|
|
/* We have it, no need to touch the resources */
|
|
if (r->flags == IORESOURCE_DMA)
|
|
goto have_everything;
|
|
}
|
|
/* Count only DMA resources for the device */
|
|
res_count = omap_device_count_resources(od, IORESOURCE_DMA);
|
|
/* The device has no DMA resource, no need for update */
|
|
if (!res_count)
|
|
goto have_everything;
|
|
|
|
res_count += pdev->num_resources;
|
|
}
|
|
|
|
/* Allocate resources memory to account for new resources */
|
|
res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
|
|
if (!res)
|
|
goto oda_exit3;
|
|
|
|
if (!pdev->num_resources) {
|
|
dev_dbg(&pdev->dev, "%s: using %d resources from hwmod\n",
|
|
__func__, res_count);
|
|
omap_device_fill_resources(od, res);
|
|
} else {
|
|
dev_dbg(&pdev->dev,
|
|
"%s: appending %d DMA resources from hwmod\n",
|
|
__func__, res_count - pdev->num_resources);
|
|
memcpy(res, pdev->resource,
|
|
sizeof(struct resource) * pdev->num_resources);
|
|
_od_fill_dma_resources(od, &res[pdev->num_resources]);
|
|
}
|
|
|
|
ret = platform_device_add_resources(pdev, res, res_count);
|
|
kfree(res);
|
|
|
|
if (ret)
|
|
goto oda_exit3;
|
|
|
|
have_everything:
|
|
pdev->archdata.od = od;
|
|
|
|
for (i = 0; i < oh_cnt; i++) {
|
|
hwmods[i]->od = od;
|
|
_add_hwmod_clocks_clkdev(od, hwmods[i]);
|
|
}
|
|
|
|
return od;
|
|
|
|
oda_exit3:
|
|
kfree(hwmods);
|
|
oda_exit2:
|
|
kfree(od);
|
|
oda_exit1:
|
|
dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
void omap_device_delete(struct omap_device *od)
|
|
{
|
|
if (!od)
|
|
return;
|
|
|
|
od->pdev->archdata.od = NULL;
|
|
kfree(od->hwmods);
|
|
kfree(od);
|
|
}
|
|
|
|
/**
|
|
* omap_device_build - build and register an omap_device with one omap_hwmod
|
|
* @pdev_name: name of the platform_device driver to use
|
|
* @pdev_id: this platform_device's connection ID
|
|
* @oh: ptr to the single omap_hwmod that backs this omap_device
|
|
* @pdata: platform_data ptr to associate with the platform_device
|
|
* @pdata_len: amount of memory pointed to by @pdata
|
|
*
|
|
* Convenience function for building and registering a single
|
|
* omap_device record, which in turn builds and registers a
|
|
* platform_device record. See omap_device_build_ss() for more
|
|
* information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
|
|
* passes along the return value of omap_device_build_ss().
|
|
*/
|
|
struct platform_device __init *omap_device_build(const char *pdev_name,
|
|
int pdev_id,
|
|
struct omap_hwmod *oh,
|
|
void *pdata, int pdata_len)
|
|
{
|
|
struct omap_hwmod *ohs[] = { oh };
|
|
|
|
if (!oh)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
|
|
pdata_len);
|
|
}
|
|
|
|
/**
|
|
* omap_device_build_ss - build and register an omap_device with multiple hwmods
|
|
* @pdev_name: name of the platform_device driver to use
|
|
* @pdev_id: this platform_device's connection ID
|
|
* @oh: ptr to the single omap_hwmod that backs this omap_device
|
|
* @pdata: platform_data ptr to associate with the platform_device
|
|
* @pdata_len: amount of memory pointed to by @pdata
|
|
*
|
|
* Convenience function for building and registering an omap_device
|
|
* subsystem record. Subsystem records consist of multiple
|
|
* omap_hwmods. This function in turn builds and registers a
|
|
* platform_device record. Returns an ERR_PTR() on error, or passes
|
|
* along the return value of omap_device_register().
|
|
*/
|
|
struct platform_device __init *omap_device_build_ss(const char *pdev_name,
|
|
int pdev_id,
|
|
struct omap_hwmod **ohs,
|
|
int oh_cnt, void *pdata,
|
|
int pdata_len)
|
|
{
|
|
int ret = -ENOMEM;
|
|
struct platform_device *pdev;
|
|
struct omap_device *od;
|
|
|
|
if (!ohs || oh_cnt == 0 || !pdev_name)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (!pdata && pdata_len > 0)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
pdev = platform_device_alloc(pdev_name, pdev_id);
|
|
if (!pdev) {
|
|
ret = -ENOMEM;
|
|
goto odbs_exit;
|
|
}
|
|
|
|
/* Set the dev_name early to allow dev_xxx in omap_device_alloc */
|
|
if (pdev->id != -1)
|
|
dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
|
|
else
|
|
dev_set_name(&pdev->dev, "%s", pdev->name);
|
|
|
|
od = omap_device_alloc(pdev, ohs, oh_cnt);
|
|
if (IS_ERR(od))
|
|
goto odbs_exit1;
|
|
|
|
ret = platform_device_add_data(pdev, pdata, pdata_len);
|
|
if (ret)
|
|
goto odbs_exit2;
|
|
|
|
ret = omap_device_register(pdev);
|
|
if (ret)
|
|
goto odbs_exit2;
|
|
|
|
return pdev;
|
|
|
|
odbs_exit2:
|
|
omap_device_delete(od);
|
|
odbs_exit1:
|
|
platform_device_put(pdev);
|
|
odbs_exit:
|
|
|
|
pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int _od_runtime_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
int ret;
|
|
|
|
ret = pm_generic_runtime_suspend(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return omap_device_idle(pdev);
|
|
}
|
|
|
|
static int _od_runtime_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
int ret;
|
|
|
|
ret = omap_device_enable(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return pm_generic_runtime_resume(dev);
|
|
}
|
|
|
|
static int _od_fail_runtime_suspend(struct device *dev)
|
|
{
|
|
dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int _od_fail_runtime_resume(struct device *dev)
|
|
{
|
|
dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
static int _od_suspend_noirq(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct omap_device *od = to_omap_device(pdev);
|
|
int ret;
|
|
|
|
/* Don't attempt late suspend on a driver that is not bound */
|
|
if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER)
|
|
return 0;
|
|
|
|
ret = pm_generic_suspend_noirq(dev);
|
|
|
|
if (!ret && !pm_runtime_status_suspended(dev)) {
|
|
if (pm_generic_runtime_suspend(dev) == 0) {
|
|
pm_runtime_set_suspended(dev);
|
|
omap_device_idle(pdev);
|
|
od->flags |= OMAP_DEVICE_SUSPENDED;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int _od_resume_noirq(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct omap_device *od = to_omap_device(pdev);
|
|
|
|
if (od->flags & OMAP_DEVICE_SUSPENDED) {
|
|
od->flags &= ~OMAP_DEVICE_SUSPENDED;
|
|
omap_device_enable(pdev);
|
|
/*
|
|
* XXX: we run before core runtime pm has resumed itself. At
|
|
* this point in time, we just restore the runtime pm state and
|
|
* considering symmetric operations in resume, we donot expect
|
|
* to fail. If we failed, something changed in core runtime_pm
|
|
* framework OR some device driver messed things up, hence, WARN
|
|
*/
|
|
WARN(pm_runtime_set_active(dev),
|
|
"Could not set %s runtime state active\n", dev_name(dev));
|
|
pm_generic_runtime_resume(dev);
|
|
}
|
|
|
|
return pm_generic_resume_noirq(dev);
|
|
}
|
|
#else
|
|
#define _od_suspend_noirq NULL
|
|
#define _od_resume_noirq NULL
|
|
#endif
|
|
|
|
struct dev_pm_domain omap_device_fail_pm_domain = {
|
|
.ops = {
|
|
SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend,
|
|
_od_fail_runtime_resume, NULL)
|
|
}
|
|
};
|
|
|
|
struct dev_pm_domain omap_device_pm_domain = {
|
|
.ops = {
|
|
SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
|
|
NULL)
|
|
USE_PLATFORM_PM_SLEEP_OPS
|
|
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq,
|
|
_od_resume_noirq)
|
|
}
|
|
};
|
|
|
|
/**
|
|
* omap_device_register - register an omap_device with one omap_hwmod
|
|
* @od: struct omap_device * to register
|
|
*
|
|
* Register the omap_device structure. This currently just calls
|
|
* platform_device_register() on the underlying platform_device.
|
|
* Returns the return value of platform_device_register().
|
|
*/
|
|
int omap_device_register(struct platform_device *pdev)
|
|
{
|
|
pr_debug("omap_device: %s: registering\n", pdev->name);
|
|
|
|
dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain);
|
|
return platform_device_add(pdev);
|
|
}
|
|
|
|
|
|
/* Public functions for use by device drivers through struct platform_data */
|
|
|
|
/**
|
|
* omap_device_enable - fully activate an omap_device
|
|
* @od: struct omap_device * to activate
|
|
*
|
|
* Do whatever is necessary for the hwmods underlying omap_device @od
|
|
* to be accessible and ready to operate. This generally involves
|
|
* enabling clocks, setting SYSCONFIG registers; and in the future may
|
|
* involve remuxing pins. Device drivers should call this function
|
|
* indirectly via pm_runtime_get*(). Returns -EINVAL if called when
|
|
* the omap_device is already enabled, or passes along the return
|
|
* value of _omap_device_enable_hwmods().
|
|
*/
|
|
int omap_device_enable(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct omap_device *od;
|
|
|
|
od = to_omap_device(pdev);
|
|
|
|
if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
|
|
dev_warn(&pdev->dev,
|
|
"omap_device: %s() called from invalid state %d\n",
|
|
__func__, od->_state);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = _omap_device_enable_hwmods(od);
|
|
|
|
if (ret == 0)
|
|
od->_state = OMAP_DEVICE_STATE_ENABLED;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_device_idle - idle an omap_device
|
|
* @od: struct omap_device * to idle
|
|
*
|
|
* Idle omap_device @od. Device drivers call this function indirectly
|
|
* via pm_runtime_put*(). Returns -EINVAL if the omap_device is not
|
|
* currently enabled, or passes along the return value of
|
|
* _omap_device_idle_hwmods().
|
|
*/
|
|
int omap_device_idle(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct omap_device *od;
|
|
|
|
od = to_omap_device(pdev);
|
|
|
|
if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
|
|
dev_warn(&pdev->dev,
|
|
"omap_device: %s() called from invalid state %d\n",
|
|
__func__, od->_state);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = _omap_device_idle_hwmods(od);
|
|
|
|
if (ret == 0)
|
|
od->_state = OMAP_DEVICE_STATE_IDLE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_device_assert_hardreset - set a device's hardreset line
|
|
* @pdev: struct platform_device * to reset
|
|
* @name: const char * name of the reset line
|
|
*
|
|
* Set the hardreset line identified by @name on the IP blocks
|
|
* associated with the hwmods backing the platform_device @pdev. All
|
|
* of the hwmods associated with @pdev must have the same hardreset
|
|
* line linked to them for this to work. Passes along the return value
|
|
* of omap_hwmod_assert_hardreset() in the event of any failure, or
|
|
* returns 0 upon success.
|
|
*/
|
|
int omap_device_assert_hardreset(struct platform_device *pdev, const char *name)
|
|
{
|
|
struct omap_device *od = to_omap_device(pdev);
|
|
int ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < od->hwmods_cnt; i++) {
|
|
ret = omap_hwmod_assert_hardreset(od->hwmods[i], name);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_device_deassert_hardreset - release a device's hardreset line
|
|
* @pdev: struct platform_device * to reset
|
|
* @name: const char * name of the reset line
|
|
*
|
|
* Release the hardreset line identified by @name on the IP blocks
|
|
* associated with the hwmods backing the platform_device @pdev. All
|
|
* of the hwmods associated with @pdev must have the same hardreset
|
|
* line linked to them for this to work. Passes along the return
|
|
* value of omap_hwmod_deassert_hardreset() in the event of any
|
|
* failure, or returns 0 upon success.
|
|
*/
|
|
int omap_device_deassert_hardreset(struct platform_device *pdev,
|
|
const char *name)
|
|
{
|
|
struct omap_device *od = to_omap_device(pdev);
|
|
int ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < od->hwmods_cnt; i++) {
|
|
ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_device_get_by_hwmod_name() - convert a hwmod name to
|
|
* device pointer.
|
|
* @oh_name: name of the hwmod device
|
|
*
|
|
* Returns back a struct device * pointer associated with a hwmod
|
|
* device represented by a hwmod_name
|
|
*/
|
|
struct device *omap_device_get_by_hwmod_name(const char *oh_name)
|
|
{
|
|
struct omap_hwmod *oh;
|
|
|
|
if (!oh_name) {
|
|
WARN(1, "%s: no hwmod name!\n", __func__);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
oh = omap_hwmod_lookup(oh_name);
|
|
if (!oh) {
|
|
WARN(1, "%s: no hwmod for %s\n", __func__,
|
|
oh_name);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
if (!oh->od) {
|
|
WARN(1, "%s: no omap_device for %s\n", __func__,
|
|
oh_name);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
return &oh->od->pdev->dev;
|
|
}
|
|
|
|
static struct notifier_block platform_nb = {
|
|
.notifier_call = _omap_device_notifier_call,
|
|
};
|
|
|
|
static int __init omap_device_init(void)
|
|
{
|
|
bus_register_notifier(&platform_bus_type, &platform_nb);
|
|
return 0;
|
|
}
|
|
omap_postcore_initcall(omap_device_init);
|
|
|
|
/**
|
|
* omap_device_late_idle - idle devices without drivers
|
|
* @dev: struct device * associated with omap_device
|
|
* @data: unused
|
|
*
|
|
* Check the driver bound status of this device, and idle it
|
|
* if there is no driver attached.
|
|
*/
|
|
static int __init omap_device_late_idle(struct device *dev, void *data)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct omap_device *od = to_omap_device(pdev);
|
|
int i;
|
|
|
|
if (!od)
|
|
return 0;
|
|
|
|
/*
|
|
* If omap_device state is enabled, but has no driver bound,
|
|
* idle it.
|
|
*/
|
|
|
|
/*
|
|
* Some devices (like memory controllers) are always kept
|
|
* enabled, and should not be idled even with no drivers.
|
|
*/
|
|
for (i = 0; i < od->hwmods_cnt; i++)
|
|
if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE)
|
|
return 0;
|
|
|
|
if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER &&
|
|
od->_driver_status != BUS_NOTIFY_BIND_DRIVER) {
|
|
if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
|
|
dev_warn(dev, "%s: enabled but no driver. Idling\n",
|
|
__func__);
|
|
omap_device_idle(pdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init omap_device_late_init(void)
|
|
{
|
|
bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
|
|
|
|
WARN(!of_have_populated_dt(),
|
|
"legacy booting deprecated, please update to boot with .dts\n");
|
|
|
|
return 0;
|
|
}
|
|
omap_late_initcall_sync(omap_device_late_init);
|