mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Uwe Kleine-König (The Capable Hub)
995832b2ce
Replace the #include of <linux/mod_devicetable.h> by the more specific <linux/device-id/*.h> where applicable. For most cases the include can be dropped completely, only a few drivers need one or two headers added. Acked-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2024 Linaro Ltd.
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* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <linux/pci-pwrctrl.h>
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#include <linux/platform_device.h>
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#include <linux/pwrseq/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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struct slot_pwrctrl {
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struct pci_pwrctrl pwrctrl;
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struct regulator_bulk_data *supplies;
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int num_supplies;
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struct clk *clk;
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struct pwrseq_desc *pwrseq;
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};
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static int slot_pwrctrl_power_on(struct pci_pwrctrl *pwrctrl)
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{
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struct slot_pwrctrl *slot = container_of(pwrctrl,
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struct slot_pwrctrl, pwrctrl);
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int ret;
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if (slot->pwrseq) {
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pwrseq_power_on(slot->pwrseq);
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return 0;
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}
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ret = regulator_bulk_enable(slot->num_supplies, slot->supplies);
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if (ret < 0) {
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dev_err(slot->pwrctrl.dev, "Failed to enable slot regulators\n");
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return ret;
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}
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return clk_prepare_enable(slot->clk);
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}
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static int slot_pwrctrl_power_off(struct pci_pwrctrl *pwrctrl)
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{
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struct slot_pwrctrl *slot = container_of(pwrctrl,
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struct slot_pwrctrl, pwrctrl);
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if (slot->pwrseq) {
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pwrseq_power_off(slot->pwrseq);
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return 0;
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}
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regulator_bulk_disable(slot->num_supplies, slot->supplies);
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clk_disable_unprepare(slot->clk);
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return 0;
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}
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static void devm_slot_pwrctrl_release(void *data)
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{
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struct slot_pwrctrl *slot = data;
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regulator_bulk_free(slot->num_supplies, slot->supplies);
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}
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static int slot_pwrctrl_probe(struct platform_device *pdev)
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{
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struct slot_pwrctrl *slot;
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struct device *dev = &pdev->dev;
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int ret;
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slot = devm_kzalloc(dev, sizeof(*slot), GFP_KERNEL);
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if (!slot)
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return -ENOMEM;
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if (of_graph_is_present(dev_of_node(dev))) {
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slot->pwrseq = devm_pwrseq_get(dev, "pcie");
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if (IS_ERR(slot->pwrseq))
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return dev_err_probe(dev, PTR_ERR(slot->pwrseq),
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"Failed to get the power sequencer\n");
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goto skip_resources;
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}
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ret = of_regulator_bulk_get_all(dev, dev_of_node(dev),
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&slot->supplies);
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if (ret < 0)
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return dev_err_probe(dev, ret, "Failed to get slot regulators\n");
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slot->num_supplies = ret;
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slot->clk = devm_clk_get_optional(dev, NULL);
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if (IS_ERR(slot->clk))
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return dev_err_probe(dev, PTR_ERR(slot->clk),
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"Failed to enable slot clock\n");
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skip_resources:
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slot->pwrctrl.power_on = slot_pwrctrl_power_on;
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slot->pwrctrl.power_off = slot_pwrctrl_power_off;
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ret = devm_add_action_or_reset(dev, devm_slot_pwrctrl_release, slot);
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if (ret)
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return ret;
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pci_pwrctrl_init(&slot->pwrctrl, dev);
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ret = devm_pci_pwrctrl_device_set_ready(dev, &slot->pwrctrl);
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if (ret)
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return dev_err_probe(dev, ret, "Failed to register pwrctrl driver\n");
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return 0;
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}
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static const struct of_device_id slot_pwrctrl_of_match[] = {
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{
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.compatible = "pciclass,0604",
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},
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/* Renesas UPD720201/UPD720202 USB 3.0 xHCI Host Controller */
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{
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.compatible = "pci1912,0014",
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, slot_pwrctrl_of_match);
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static struct platform_driver slot_pwrctrl_driver = {
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.driver = {
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.name = "pci-pwrctrl-slot",
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.of_match_table = slot_pwrctrl_of_match,
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},
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.probe = slot_pwrctrl_probe,
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};
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module_platform_driver(slot_pwrctrl_driver);
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MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
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MODULE_DESCRIPTION("Generic PCI Power Control driver for PCI Slots");
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MODULE_LICENSE("GPL");
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