Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 176 insertions, 0 deletions

diff --git a/drivers/pmdomain/imx/imx93-pd.c b/drivers/pmdomain/imx/imx93-pd.c
new file mode 100644
index 0000000000..b9e60d1368
--- /dev/null
+++ b/drivers/pmdomain/imx/imx93-pd.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2022 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+
+#define MIX_SLICE_SW_CTRL_OFF		0x20
+#define SLICE_SW_CTRL_PSW_CTRL_OFF_MASK	BIT(4)
+#define SLICE_SW_CTRL_PDN_SOFT_MASK	BIT(31)
+
+#define MIX_FUNC_STAT_OFF		0xB4
+
+#define FUNC_STAT_PSW_STAT_MASK		BIT(0)
+#define FUNC_STAT_RST_STAT_MASK		BIT(2)
+#define FUNC_STAT_ISO_STAT_MASK		BIT(4)
+
+struct imx93_power_domain {
+	struct generic_pm_domain genpd;
+	struct device *dev;
+	void __iomem *addr;
+	struct clk_bulk_data *clks;
+	int num_clks;
+	bool init_off;
+};
+
+#define to_imx93_pd(_genpd) container_of(_genpd, struct imx93_power_domain, genpd)
+
+static int imx93_pd_on(struct generic_pm_domain *genpd)
+{
+	struct imx93_power_domain *domain = to_imx93_pd(genpd);
+	void __iomem *addr = domain->addr;
+	u32 val;
+	int ret;
+
+	ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
+	if (ret) {
+		dev_err(domain->dev, "failed to enable clocks for domain: %s\n", genpd->name);
+		return ret;
+	}
+
+	val = readl(addr + MIX_SLICE_SW_CTRL_OFF);
+	val &= ~SLICE_SW_CTRL_PDN_SOFT_MASK;
+	writel(val, addr + MIX_SLICE_SW_CTRL_OFF);
+
+	ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,
+				 !(val & FUNC_STAT_ISO_STAT_MASK), 1, 10000);
+	if (ret) {
+		dev_err(domain->dev, "pd_on timeout: name: %s, stat: %x\n", genpd->name, val);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int imx93_pd_off(struct generic_pm_domain *genpd)
+{
+	struct imx93_power_domain *domain = to_imx93_pd(genpd);
+	void __iomem *addr = domain->addr;
+	int ret;
+	u32 val;
+
+	/* Power off MIX */
+	val = readl(addr + MIX_SLICE_SW_CTRL_OFF);
+	val |= SLICE_SW_CTRL_PDN_SOFT_MASK;
+	writel(val, addr + MIX_SLICE_SW_CTRL_OFF);
+
+	ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,
+				 val & FUNC_STAT_PSW_STAT_MASK, 1, 1000);
+	if (ret) {
+		dev_err(domain->dev, "pd_off timeout: name: %s, stat: %x\n", genpd->name, val);
+		return ret;
+	}
+
+	clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
+
+	return 0;
+};
+
+static int imx93_pd_remove(struct platform_device *pdev)
+{
+	struct imx93_power_domain *domain = platform_get_drvdata(pdev);
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	if (!domain->init_off)
+		clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
+
+	of_genpd_del_provider(np);
+	pm_genpd_remove(&domain->genpd);
+
+	return 0;
+}
+
+static int imx93_pd_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct imx93_power_domain *domain;
+	int ret;
+
+	domain = devm_kzalloc(dev, sizeof(*domain), GFP_KERNEL);
+	if (!domain)
+		return -ENOMEM;
+
+	domain->addr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(domain->addr))
+		return PTR_ERR(domain->addr);
+
+	domain->num_clks = devm_clk_bulk_get_all(dev, &domain->clks);
+	if (domain->num_clks < 0)
+		return dev_err_probe(dev, domain->num_clks, "Failed to get domain's clocks\n");
+
+	domain->genpd.name = dev_name(dev);
+	domain->genpd.power_off = imx93_pd_off;
+	domain->genpd.power_on = imx93_pd_on;
+	domain->dev = dev;
+
+	domain->init_off = readl(domain->addr + MIX_FUNC_STAT_OFF) & FUNC_STAT_ISO_STAT_MASK;
+	/* Just to sync the status of hardware */
+	if (!domain->init_off) {
+		ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
+		if (ret) {
+			dev_err(domain->dev, "failed to enable clocks for domain: %s\n",
+				domain->genpd.name);
+			return ret;
+		}
+	}
+
+	ret = pm_genpd_init(&domain->genpd, NULL, domain->init_off);
+	if (ret)
+		goto err_clk_unprepare;
+
+	platform_set_drvdata(pdev, domain);
+
+	ret = of_genpd_add_provider_simple(np, &domain->genpd);
+	if (ret)
+		goto err_genpd_remove;
+
+	return 0;
+
+err_genpd_remove:
+	pm_genpd_remove(&domain->genpd);
+
+err_clk_unprepare:
+	if (!domain->init_off)
+		clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
+
+	return ret;
+}
+
+static const struct of_device_id imx93_pd_ids[] = {
+	{ .compatible = "fsl,imx93-src-slice" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, imx93_pd_ids);
+
+static struct platform_driver imx93_power_domain_driver = {
+	.driver = {
+		.name	= "imx93_power_domain",
+		.of_match_table = imx93_pd_ids,
+	},
+	.probe = imx93_pd_probe,
+	.remove = imx93_pd_remove,
+};
+module_platform_driver(imx93_power_domain_driver);
+
+MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
+MODULE_DESCRIPTION("NXP i.MX93 power domain driver");
+MODULE_LICENSE("GPL");