#include <linux/kobject.h>
#include <../kernel/power/power.h>
#include <linux/amlogic/scpi_protocol.h>
+#include "vad_power.h"
typedef unsigned long (psci_fn)(unsigned long, unsigned long,
unsigned long, unsigned long);
{
struct device_node *cpu_node;
struct device_node *state_node;
+ struct pm_data *p_data;
+ struct device *dev = &pdev->dev;
int count = 0, ret;
u32 ver = psci_get_version();
u32 paddr = 0;
suspend_set_ops(&meson_gx_ops);
}
+ p_data = devm_kzalloc(&pdev->dev, sizeof(struct pm_data), GFP_KERNEL);
+ if (!p_data)
+ return -ENOMEM;
+ p_data->dev = dev;
+ dev_set_drvdata(dev, p_data);
+
+ vad_wakeup_power_init(pdev, p_data);
+
ret = of_property_read_u32(pdev->dev.of_node,
"debug_reg", &paddr);
if (!ret) {
return -ENXIO;
}
+int pm_suspend_noirq(struct device *dev)
+{
+ vad_wakeup_power_suspend(dev);
+ return 0;
+}
+
+int pm_resume_noirq(struct device *dev)
+{
+ vad_wakeup_power_resume(dev);
+ return 0;
+}
+
+static const struct dev_pm_ops meson_pm_noirq_ops = {
+ .suspend_noirq = pm_suspend_noirq,
+ .resume_noirq = pm_resume_noirq,
+};
+
static int meson_pm_remove(struct platform_device *pdev)
{
return 0;
.name = "pm-meson",
.owner = THIS_MODULE,
.of_match_table = amlogic_pm_dt_match,
+ .pm = &meson_pm_noirq_ops,
},
.probe = meson_pm_probe,
.remove = meson_pm_remove,
--- /dev/null
+/*
+ * drivers/amlogic/pm/vad_power.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/errno.h>
+#include <linux/of_address.h>
+#include <linux/amlogic/pm.h>
+#include <linux/kobject.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include "../../gpio/gpiolib.h"
+#include "vad_power.h"
+
+#define IO3V3_EN "vddio3v3_en"
+
+static int fixed_pll_cnt;
+
+int vad_wakeup_power_init(struct platform_device *pdev, struct pm_data *p_data)
+{
+ int ret;
+ const char *value;
+ struct gpio_desc *desc;
+ u32 paddr = 0;
+
+ ret = of_property_read_string(pdev->dev.of_node, "vddio3v3_en", &value);
+ if (ret) {
+ pr_info("no vddio3v3_en pin");
+ p_data->vddio3v3_en = 0;
+ } else {
+ desc = of_get_named_gpiod_flags(pdev->dev.of_node,
+ "vddio3v3_en", 0, NULL);
+ p_data->vddio3v3_en = desc_to_gpio(desc);
+ }
+ if (p_data->vddio3v3_en > 0)
+ gpio_request(p_data->vddio3v3_en, IO3V3_EN);
+
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "vad_wakeup_disable", &paddr);
+ if (!ret) {
+ p_data->vad_wakeup_disable = paddr;
+ pr_info("vad_wakeup_disable: 0x%x\n", paddr);
+ } else {
+ p_data->vad_wakeup_disable = 1;
+ }
+
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "dmc_asr", &paddr);
+ if (!ret) {
+ pr_info("dmc_asr: 0x%x\n", paddr);
+ p_data->dmc_asr = ioremap(paddr, 0x4);
+ } else {
+ p_data->dmc_asr = 0;
+ }
+
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "cpu_reg", &paddr);
+ if (!ret) {
+ pr_info("cpu_reg: 0x%x\n", paddr);
+ p_data->cpu_reg = ioremap(paddr, 0x4);
+ } else {
+ p_data->cpu_reg = 0;
+ }
+
+ p_data->switch_clk81 = devm_clk_get(&pdev->dev, "switch_clk81");
+ if (IS_ERR(p_data->switch_clk81)) {
+ dev_err(&pdev->dev,
+ "Can't get switch_clk81\n");
+ return PTR_ERR(p_data->switch_clk81);
+ }
+ p_data->clk81 = devm_clk_get(&pdev->dev, "clk81");
+ if (IS_ERR(p_data->clk81)) {
+ dev_err(&pdev->dev,
+ "Can't get clk81\n");
+ return PTR_ERR(p_data->clk81);
+ }
+ p_data->xtal = devm_clk_get(&pdev->dev, "xtal");
+ if (IS_ERR(p_data->xtal)) {
+ dev_err(&pdev->dev,
+ "Can't get xtal\n");
+ return PTR_ERR(p_data->xtal);
+ }
+ p_data->fixed_pll = devm_clk_get(&pdev->dev, "fixed_pll");
+ if (IS_ERR(p_data->fixed_pll)) {
+ dev_err(&pdev->dev,
+ "Can't get fixed_pll\n");
+ return PTR_ERR(p_data->fixed_pll);
+ }
+
+ return 0;
+}
+
+void cpu_clk_switch_to_gp1(unsigned int flag, void __iomem *paddr)
+{
+ u32 control;
+ u32 dyn_pre_mux = 0;
+ u32 dyn_post_mux = 1;
+ u32 dyn_div = 1;
+
+ control = readl(paddr);
+ /*check cpu busy or not*/
+ do {
+ control = readl(paddr);
+ } while (control & (1 << 28));
+
+ if (!flag) {
+ dyn_pre_mux = 3;
+ dyn_post_mux = 1;
+ dyn_div = 1;
+ /*cpu clk sel channel a*/
+ if (control & (1 << 10)) {
+ control = (control & ~((1 << 10) | (0x3f << 4)
+ | (1 << 2) | (0x3 << 0)))
+ | ((0 << 10)
+ | (dyn_div << 4)
+ | (dyn_post_mux << 2)
+ | (dyn_pre_mux << 0));
+ } else {
+ /*cpu clk sel channel b*/
+ control = (control & ~((1 << 10) | (0x3f << 20)
+ | (1 << 18) | (0x3 << 16)))
+ | ((1 << 10)
+ | (dyn_div << 20)
+ | (dyn_post_mux << 18)
+ | (dyn_pre_mux << 16));
+ }
+ } else {
+ if (control & (1 << 10))
+ control = control & ~(1 << 10);
+ else
+ control = control | (1 << 10);
+ }
+ writel(control, paddr);
+}
+
+int vad_wakeup_power_suspend(struct device *dev)
+{
+ struct pm_data *p_data = dev_get_drvdata(dev);
+ int i;
+
+ if (!is_pm_freeze_mode() || p_data->vad_wakeup_disable)
+ return 0;
+
+ clk_set_parent(p_data->switch_clk81, p_data->xtal);
+ pr_info("switch clk81 to 24M.\n");
+
+ /*cpu clk switch to gp1*/
+ cpu_clk_switch_to_gp1(0, p_data->cpu_reg);
+ pr_info("cpu clk switch to gp1.\n");
+
+ fixed_pll_cnt = __clk_get_enable_count(p_data->fixed_pll);
+ if (fixed_pll_cnt > 1)
+ dev_warn(dev,
+ "Now fixed pll enable count = %d\n",
+ fixed_pll_cnt);
+
+ for (i = 0; i < fixed_pll_cnt; i++)
+ clk_disable_unprepare(p_data->fixed_pll);
+
+ gpio_direction_output(p_data->vddio3v3_en, 0);
+ pr_info("power off vddio_3v3.\n");
+
+ if (p_data->dmc_asr) {
+ writel(0x3fe00, p_data->dmc_asr);
+ pr_info("enable dmc asr\n");
+ }
+
+ return 0;
+}
+
+int vad_wakeup_power_resume(struct device *dev)
+{
+ struct pm_data *p_data = dev_get_drvdata(dev);
+ int i;
+
+ if (!is_pm_freeze_mode() || p_data->vad_wakeup_disable)
+ return 0;
+
+ gpio_direction_output(p_data->vddio3v3_en, 1);
+ pr_info("power on vddio_3v3.\n");
+
+ if (p_data->dmc_asr) {
+ writel(0x0, p_data->dmc_asr);
+ pr_info("disable dmc asr\n");
+ }
+
+ /* enable fixed pll */
+ for (i = 0; i < fixed_pll_cnt; i++) {
+ if (clk_prepare_enable(p_data->fixed_pll))
+ dev_err(dev, "failed to enable fixed pll\n");
+ }
+
+ /*restore cpu clk*/
+ cpu_clk_switch_to_gp1(1, p_data->cpu_reg);
+ pr_info("cpu clk restore.\n");
+ clk_set_parent(p_data->switch_clk81, p_data->clk81);
+ pr_info("switch clk81 to 166M.\n");
+
+ return 0;
+}
projects / platform / kernel / linux-amlogic.git / commitdiff