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From:   "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To:     robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        shawnguo@kernel.org, s.hauer@pengutronix.de, l.stach@pengutronix.de
Cc:     kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
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        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        aisheng.dong@nxp.com, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH V6 4/6] soc: imx: add i.MX93 media blk ctrl driver
Date:   Tue, 19 Jul 2022 15:35:39 +0800
Message-Id: <20220719073541.197788-5-peng.fan@oss.nxp.com>
In-Reply-To: <20220719073541.197788-1-peng.fan@oss.nxp.com>
References: <20220719073541.197788-1-peng.fan@oss.nxp.com>
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From: Peng Fan <peng.fan@nxp.com>

Add i.MX93 mediamix blk ctrl support.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/soc/imx/Makefile         |   2 +-
 drivers/soc/imx/imx93-blk-ctrl.c | 333 +++++++++++++++++++++++++++++++
 2 files changed, 334 insertions(+), 1 deletion(-)
 create mode 100644 drivers/soc/imx/imx93-blk-ctrl.c

diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index a0baa2a01adb..754866e0a10d 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -7,4 +7,4 @@ obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
 obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
 obj-$(CONFIG_SOC_IMX8M) += imx8m-blk-ctrl.o
 obj-$(CONFIG_SOC_IMX8M) += imx8mp-blk-ctrl.o
-obj-$(CONFIG_SOC_IMX9) += imx93-src.o imx93-pd.o
+obj-$(CONFIG_SOC_IMX9) += imx93-src.o imx93-pd.o imx93-blk-ctrl.o
diff --git a/drivers/soc/imx/imx93-blk-ctrl.c b/drivers/soc/imx/imx93-blk-ctrl.c
new file mode 100644
index 000000000000..42be09688cf1
--- /dev/null
+++ b/drivers/soc/imx/imx93-blk-ctrl.c
@@ -0,0 +1,333 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2022 NXP, Peng Fan <peng.fan@nxp.com>
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/clk.h>
+
+#include <dt-bindings/power/fsl,imx93-power.h>
+
+#define BLK_SFT_RSTN	0x0
+#define BLK_CLK_EN	0x4
+
+#define BLK_MAX_CLKS 4
+
+struct imx93_blk_ctrl_domain;
+
+struct imx93_blk_ctrl {
+	struct device *dev;
+	struct regmap *regmap;
+	int num_clks;
+	struct clk_bulk_data clks[BLK_MAX_CLKS];
+	struct imx93_blk_ctrl_domain *domains;
+	struct genpd_onecell_data onecell_data;
+};
+
+struct imx93_blk_ctrl_domain_data {
+	const char *name;
+	const char * const *clk_names;
+	int num_clks;
+	u32 rst_mask;
+	u32 clk_mask;
+
+};
+
+#define DOMAIN_MAX_CLKS 4
+
+struct imx93_blk_ctrl_domain {
+	struct generic_pm_domain genpd;
+	const struct imx93_blk_ctrl_domain_data *data;
+	struct clk_bulk_data clks[DOMAIN_MAX_CLKS];
+	struct imx93_blk_ctrl *bc;
+};
+
+struct imx93_blk_ctrl_data {
+	int max_reg;
+	const struct imx93_blk_ctrl_domain_data *domains;
+	const struct imx93_blk_ctrl_domain_data *bus;
+	int num_domains;
+};
+
+static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_bus_data = {
+	.clk_names = (const char *[]){ "axi", "apb", "nic", },
+	.num_clks = 3,
+};
+
+static inline struct imx93_blk_ctrl_domain *
+to_imx93_blk_ctrl_domain(struct generic_pm_domain *genpd)
+{
+	return container_of(genpd, struct imx93_blk_ctrl_domain, genpd);
+}
+
+static int imx93_blk_ctrl_power_on(struct generic_pm_domain *genpd)
+{
+	struct imx93_blk_ctrl_domain *domain = to_imx93_blk_ctrl_domain(genpd);
+	const struct imx93_blk_ctrl_domain_data *data = domain->data;
+	struct imx93_blk_ctrl *bc = domain->bc;
+	int ret;
+
+	ret = clk_bulk_prepare_enable(bc->num_clks, bc->clks);
+	if (ret) {
+		dev_err(bc->dev, "failed to enable bus clocks\n");
+		return ret;
+	}
+
+	ret = clk_bulk_prepare_enable(data->num_clks, domain->clks);
+	if (ret) {
+		dev_err(bc->dev, "failed to enable clocks\n");
+		return ret;
+	}
+
+	ret = pm_runtime_get_sync(bc->dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(bc->dev);
+		dev_err(bc->dev, "failed to power up domain\n");
+		goto disable_clk;
+	}
+
+	/* ungate clk */
+	regmap_clear_bits(bc->regmap, BLK_CLK_EN, data->clk_mask);
+
+	/* release reset */
+	regmap_set_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask);
+
+	dev_info(bc->dev, "pd_on: name: %s\n", genpd->name);
+
+	return 0;
+
+disable_clk:
+	clk_bulk_disable_unprepare(data->num_clks, domain->clks);
+
+	return ret;
+}
+
+static int imx93_blk_ctrl_power_off(struct generic_pm_domain *genpd)
+{
+	struct imx93_blk_ctrl_domain *domain = to_imx93_blk_ctrl_domain(genpd);
+	const struct imx93_blk_ctrl_domain_data *data = domain->data;
+	struct imx93_blk_ctrl *bc = domain->bc;
+
+	dev_info(bc->dev, "pd_off: name: %s\n", genpd->name);
+
+	regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask);
+	regmap_set_bits(bc->regmap, BLK_CLK_EN, data->clk_mask);
+
+	pm_runtime_put(bc->dev);
+
+	clk_bulk_disable_unprepare(data->num_clks, domain->clks);
+
+	clk_bulk_disable_unprepare(bc->num_clks, bc->clks);
+
+	return 0;
+}
+
+static struct generic_pm_domain *
+imx93_blk_ctrl_xlate(struct of_phandle_args *args, void *data)
+{
+	struct genpd_onecell_data *onecell_data = data;
+	unsigned int index = args->args[0];
+
+	if (args->args_count != 1 ||
+	    index >= onecell_data->num_domains)
+		return ERR_PTR(-EINVAL);
+
+	return onecell_data->domains[index];
+}
+
+static int imx93_blk_ctrl_probe(struct platform_device *pdev)
+{
+	const struct imx93_blk_ctrl_data *bc_data;
+	struct device *dev = &pdev->dev;
+	struct imx93_blk_ctrl *bc;
+	void __iomem *base;
+	int i, ret;
+	const struct imx93_blk_ctrl_domain_data *bus;
+
+	struct regmap_config regmap_config = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+	};
+
+	bc = devm_kzalloc(dev, sizeof(*bc), GFP_KERNEL);
+	if (!bc)
+		return -ENOMEM;
+
+	bc->dev = dev;
+
+	bc_data = of_device_get_match_data(dev);
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	regmap_config.max_register = bc_data->max_reg;
+	bc->regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
+	if (IS_ERR(bc->regmap))
+		return dev_err_probe(dev, PTR_ERR(bc->regmap),
+				     "failed to init regmap\n");
+
+	bc->domains = devm_kcalloc(dev, bc_data->num_domains + 1,
+				   sizeof(struct imx93_blk_ctrl_domain),
+				   GFP_KERNEL);
+	if (!bc->domains)
+		return -ENOMEM;
+
+	bus = bc_data->bus;
+
+	bc->onecell_data.num_domains = bc_data->num_domains;
+	bc->onecell_data.xlate = imx93_blk_ctrl_xlate;
+	bc->onecell_data.domains =
+		devm_kcalloc(dev, bc_data->num_domains,
+			     sizeof(struct generic_pm_domain *), GFP_KERNEL);
+	if (!bc->onecell_data.domains)
+		return -ENOMEM;
+
+	for (i = 0; i < bus->num_clks; i++)
+		bc->clks[i].id = bus->clk_names[i];
+	bc->num_clks = bus->num_clks;
+
+	ret = devm_clk_bulk_get(dev, bc->num_clks, bc->clks);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to get bus clock\n");
+		return ret;
+	}
+
+	for (i = 0; i < bc_data->num_domains; i++) {
+		const struct imx93_blk_ctrl_domain_data *data = &bc_data->domains[i];
+		struct imx93_blk_ctrl_domain *domain = &bc->domains[i];
+		int j;
+
+		domain->data = data;
+
+		for (j = 0; j < data->num_clks; j++)
+			domain->clks[j].id = data->clk_names[j];
+
+		ret = devm_clk_bulk_get(dev, data->num_clks, domain->clks);
+		if (ret) {
+			dev_err_probe(dev, ret, "failed to get clock\n");
+			goto cleanup_pds;
+		}
+
+		domain->genpd.name = data->name;
+		domain->genpd.power_on = imx93_blk_ctrl_power_on;
+		domain->genpd.power_off = imx93_blk_ctrl_power_off;
+		domain->bc = bc;
+
+		ret = pm_genpd_init(&domain->genpd, NULL, true);
+		if (ret) {
+			dev_err_probe(dev, ret, "failed to init power domain\n");
+			goto cleanup_pds;
+		}
+
+		bc->onecell_data.domains[i] = &domain->genpd;
+	}
+
+	pm_runtime_enable(dev);
+
+	ret = of_genpd_add_provider_onecell(dev->of_node, &bc->onecell_data);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to add power domain provider\n");
+		goto cleanup_pds;
+	}
+
+
+	dev_set_drvdata(dev, bc);
+
+	return 0;
+
+cleanup_pds:
+	for (i--; i >= 0; i--)
+		pm_genpd_remove(&bc->domains[i].genpd);
+
+	return ret;
+}
+
+static int imx93_blk_ctrl_remove(struct platform_device *pdev)
+{
+	struct imx93_blk_ctrl *bc = dev_get_drvdata(&pdev->dev);
+	int i;
+
+	of_genpd_del_provider(pdev->dev.of_node);
+
+	for (i = 0; bc->onecell_data.num_domains; i++) {
+		struct imx93_blk_ctrl_domain *domain = &bc->domains[i];
+
+		pm_genpd_remove(&domain->genpd);
+	}
+
+	return 0;
+}
+
+static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] = {
+	[IMX93_MEDIABLK_PD_MIPI_DSI] = {
+		.name = "mediablk-mipi-dsi",
+		.clk_names = (const char *[]){ "dsi" },
+		.num_clks = 1,
+		.rst_mask = BIT(11) | BIT(12),
+		.clk_mask = BIT(11) | BIT(12),
+	},
+	[IMX93_MEDIABLK_PD_MIPI_CSI] = {
+		.name = "mediablk-mipi-csi",
+		.clk_names = (const char *[]){ "cam", "csi" },
+		.num_clks = 2,
+		.rst_mask = BIT(9) | BIT(10),
+		.clk_mask = BIT(9) | BIT(10),
+	},
+	[IMX93_MEDIABLK_PD_PXP] = {
+		.name = "mediablk-pxp",
+		.clk_names = (const char *[]){ "pxp" },
+		.num_clks = 1,
+		.rst_mask = BIT(7) | BIT(8),
+		.clk_mask = BIT(7) | BIT(8),
+	},
+	[IMX93_MEDIABLK_PD_LCDIF] = {
+		.name = "mediablk-lcdif",
+		.clk_names = (const char *[]){ "disp", "lcdif" },
+		.num_clks = 2,
+		.rst_mask = BIT(4) | BIT(5) | BIT(6),
+		.clk_mask = BIT(4) | BIT(5) | BIT(6),
+	},
+	[IMX93_MEDIABLK_PD_ISI] = {
+		.name = "mediablk-isi",
+		.clk_names = (const char *[]){ "isi" },
+		.num_clks = 1,
+		.rst_mask = BIT(2) | BIT(3),
+		.clk_mask = BIT(2) | BIT(3),
+	},
+};
+
+static const struct imx93_blk_ctrl_data imx93_media_blk_ctl_dev_data = {
+	.max_reg = 0x90,
+	.domains = imx93_media_blk_ctl_domain_data,
+	.bus = &imx93_media_blk_ctl_bus_data,
+	.num_domains = ARRAY_SIZE(imx93_media_blk_ctl_domain_data),
+};
+
+static const struct of_device_id imx93_blk_ctrl_of_match[] = {
+	{
+		.compatible = "fsl,imx93-media-blk-ctrl",
+		.data = &imx93_media_blk_ctl_dev_data
+	}, {
+		/* Sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(of, imx93_blk_ctrl_of_match);
+
+static struct platform_driver imx93_blk_ctrl_driver = {
+	.probe = imx93_blk_ctrl_probe,
+	.remove = imx93_blk_ctrl_remove,
+	.driver = {
+		.name = "imx93-blk-ctrl",
+		.of_match_table = imx93_blk_ctrl_of_match,
+	},
+};
+module_platform_driver(imx93_blk_ctrl_driver);
-- 
2.25.1