// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2022 Pengutronix, Lucas Stach */ #include #include #include #include #include #include #include #include #include #include #include #include #define GPR_REG0 0x0 #define PCIE_CLOCK_MODULE_EN BIT(0) #define USB_CLOCK_MODULE_EN BIT(1) #define PCIE_PHY_APB_RST BIT(4) #define PCIE_PHY_INIT_RST BIT(5) #define GPR_REG1 0x4 #define PLL_LOCK BIT(13) #define GPR_REG2 0x8 #define P_PLL_MASK GENMASK(5, 0) #define M_PLL_MASK GENMASK(15, 6) #define S_PLL_MASK GENMASK(18, 16) #define GPR_REG3 0xc #define PLL_CKE BIT(17) #define PLL_RST BIT(31) struct imx8mp_blk_ctrl_domain; struct imx8mp_blk_ctrl { struct device *dev; struct notifier_block power_nb; struct device *bus_power_dev; struct regmap *regmap; struct imx8mp_blk_ctrl_domain *domains; struct genpd_onecell_data onecell_data; void (*power_off) (struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain); void (*power_on) (struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain); }; struct imx8mp_blk_ctrl_domain_data { const char *name; const char * const *clk_names; int num_clks; const char * const *path_names; int num_paths; const char *gpc_name; }; #define DOMAIN_MAX_CLKS 3 #define DOMAIN_MAX_PATHS 3 struct imx8mp_blk_ctrl_domain { struct generic_pm_domain genpd; const struct imx8mp_blk_ctrl_domain_data *data; struct clk_bulk_data clks[DOMAIN_MAX_CLKS]; struct icc_bulk_data paths[DOMAIN_MAX_PATHS]; struct device *power_dev; struct imx8mp_blk_ctrl *bc; int num_paths; int id; }; struct imx8mp_blk_ctrl_data { int max_reg; int (*probe) (struct imx8mp_blk_ctrl *bc); notifier_fn_t power_notifier_fn; void (*power_off) (struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain); void (*power_on) (struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain); const struct imx8mp_blk_ctrl_domain_data *domains; int num_domains; }; static inline struct imx8mp_blk_ctrl_domain * to_imx8mp_blk_ctrl_domain(struct generic_pm_domain *genpd) { return container_of(genpd, struct imx8mp_blk_ctrl_domain, genpd); } struct clk_hsio_pll { struct clk_hw hw; struct regmap *regmap; }; static inline struct clk_hsio_pll *to_clk_hsio_pll(struct clk_hw *hw) { return container_of(hw, struct clk_hsio_pll, hw); } static int clk_hsio_pll_prepare(struct clk_hw *hw) { struct clk_hsio_pll *clk = to_clk_hsio_pll(hw); u32 val; /* set the PLL configuration */ regmap_update_bits(clk->regmap, GPR_REG2, P_PLL_MASK | M_PLL_MASK | S_PLL_MASK, FIELD_PREP(P_PLL_MASK, 12) | FIELD_PREP(M_PLL_MASK, 800) | FIELD_PREP(S_PLL_MASK, 4)); /* de-assert PLL reset */ regmap_update_bits(clk->regmap, GPR_REG3, PLL_RST, PLL_RST); /* enable PLL */ regmap_update_bits(clk->regmap, GPR_REG3, PLL_CKE, PLL_CKE); return regmap_read_poll_timeout(clk->regmap, GPR_REG1, val, val & PLL_LOCK, 10, 100); } static void clk_hsio_pll_unprepare(struct clk_hw *hw) { struct clk_hsio_pll *clk = to_clk_hsio_pll(hw); regmap_update_bits(clk->regmap, GPR_REG3, PLL_RST | PLL_CKE, 0); } static int clk_hsio_pll_is_prepared(struct clk_hw *hw) { struct clk_hsio_pll *clk = to_clk_hsio_pll(hw); return regmap_test_bits(clk->regmap, GPR_REG1, PLL_LOCK); } static unsigned long clk_hsio_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { return 100000000; } static const struct clk_ops clk_hsio_pll_ops = { .prepare = clk_hsio_pll_prepare, .unprepare = clk_hsio_pll_unprepare, .is_prepared = clk_hsio_pll_is_prepared, .recalc_rate = clk_hsio_pll_recalc_rate, }; static int imx8mp_hsio_blk_ctrl_probe(struct imx8mp_blk_ctrl *bc) { struct clk_hsio_pll *clk_hsio_pll; struct clk_hw *hw; struct clk_init_data init = {}; int ret; clk_hsio_pll = devm_kzalloc(bc->dev, sizeof(*clk_hsio_pll), GFP_KERNEL); if (!clk_hsio_pll) return -ENOMEM; init.name = "hsio_pll"; init.ops = &clk_hsio_pll_ops; init.parent_names = (const char *[]){"osc_24m"}; init.num_parents = 1; clk_hsio_pll->regmap = bc->regmap; clk_hsio_pll->hw.init = &init; hw = &clk_hsio_pll->hw; ret = devm_clk_hw_register(bc->bus_power_dev, hw); if (ret) return ret; return devm_of_clk_add_hw_provider(bc->dev, of_clk_hw_simple_get, hw); } static void imx8mp_hsio_blk_ctrl_power_on(struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain) { switch (domain->id) { case IMX8MP_HSIOBLK_PD_USB: regmap_set_bits(bc->regmap, GPR_REG0, USB_CLOCK_MODULE_EN); break; case IMX8MP_HSIOBLK_PD_PCIE: regmap_set_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN); break; case IMX8MP_HSIOBLK_PD_PCIE_PHY: regmap_set_bits(bc->regmap, GPR_REG0, PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST); break; default: break; } } static void imx8mp_hsio_blk_ctrl_power_off(struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain) { switch (domain->id) { case IMX8MP_HSIOBLK_PD_USB: regmap_clear_bits(bc->regmap, GPR_REG0, USB_CLOCK_MODULE_EN); break; case IMX8MP_HSIOBLK_PD_PCIE: regmap_clear_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN); break; case IMX8MP_HSIOBLK_PD_PCIE_PHY: regmap_clear_bits(bc->regmap, GPR_REG0, PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST); break; default: break; } } static int imx8mp_hsio_power_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct imx8mp_blk_ctrl *bc = container_of(nb, struct imx8mp_blk_ctrl, power_nb); struct clk_bulk_data *usb_clk = bc->domains[IMX8MP_HSIOBLK_PD_USB].clks; int num_clks = bc->domains[IMX8MP_HSIOBLK_PD_USB].data->num_clks; int ret; switch (action) { case GENPD_NOTIFY_ON: /* * enable USB clock for a moment for the power-on ADB handshake * to proceed */ ret = clk_bulk_prepare_enable(num_clks, usb_clk); if (ret) return NOTIFY_BAD; regmap_set_bits(bc->regmap, GPR_REG0, USB_CLOCK_MODULE_EN); udelay(5); regmap_clear_bits(bc->regmap, GPR_REG0, USB_CLOCK_MODULE_EN); clk_bulk_disable_unprepare(num_clks, usb_clk); break; case GENPD_NOTIFY_PRE_OFF: /* enable USB clock for the power-down ADB handshake to work */ ret = clk_bulk_prepare_enable(num_clks, usb_clk); if (ret) return NOTIFY_BAD; regmap_set_bits(bc->regmap, GPR_REG0, USB_CLOCK_MODULE_EN); break; case GENPD_NOTIFY_OFF: clk_bulk_disable_unprepare(num_clks, usb_clk); break; default: break; } return NOTIFY_OK; } static const struct imx8mp_blk_ctrl_domain_data imx8mp_hsio_domain_data[] = { [IMX8MP_HSIOBLK_PD_USB] = { .name = "hsioblk-usb", .clk_names = (const char *[]){ "usb" }, .num_clks = 1, .gpc_name = "usb", .path_names = (const char *[]){"usb1", "usb2"}, .num_paths = 2, }, [IMX8MP_HSIOBLK_PD_USB_PHY1] = { .name = "hsioblk-usb-phy1", .gpc_name = "usb-phy1", }, [IMX8MP_HSIOBLK_PD_USB_PHY2] = { .name = "hsioblk-usb-phy2", .gpc_name = "usb-phy2", }, [IMX8MP_HSIOBLK_PD_PCIE] = { .name = "hsioblk-pcie", .clk_names = (const char *[]){ "pcie" }, .num_clks = 1, .gpc_name = "pcie", .path_names = (const char *[]){"noc-pcie", "pcie"}, .num_paths = 2, }, [IMX8MP_HSIOBLK_PD_PCIE_PHY] = { .name = "hsioblk-pcie-phy", .gpc_name = "pcie-phy", }, }; static const struct imx8mp_blk_ctrl_data imx8mp_hsio_blk_ctl_dev_data = { .max_reg = 0x24, .probe = imx8mp_hsio_blk_ctrl_probe, .power_on = imx8mp_hsio_blk_ctrl_power_on, .power_off = imx8mp_hsio_blk_ctrl_power_off, .power_notifier_fn = imx8mp_hsio_power_notifier, .domains = imx8mp_hsio_domain_data, .num_domains = ARRAY_SIZE(imx8mp_hsio_domain_data), }; #define HDMI_RTX_RESET_CTL0 0x20 #define HDMI_RTX_CLK_CTL0 0x40 #define HDMI_RTX_CLK_CTL1 0x50 #define HDMI_RTX_CLK_CTL2 0x60 #define HDMI_RTX_CLK_CTL3 0x70 #define HDMI_RTX_CLK_CTL4 0x80 #define HDMI_TX_CONTROL0 0x200 #define HDMI_LCDIF_NOC_HURRY_MASK GENMASK(14, 12) static void imx8mp_hdmi_blk_ctrl_power_on(struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain) { switch (domain->id) { case IMX8MP_HDMIBLK_PD_IRQSTEER: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(9)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(16)); break; case IMX8MP_HDMIBLK_PD_LCDIF: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(20)); regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(11)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(4) | BIT(5) | BIT(6)); regmap_set_bits(bc->regmap, HDMI_TX_CONTROL0, FIELD_PREP(HDMI_LCDIF_NOC_HURRY_MASK, 7)); break; case IMX8MP_HDMIBLK_PD_PAI: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(17)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(18)); break; case IMX8MP_HDMIBLK_PD_PVI: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(28)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(22)); break; case IMX8MP_HDMIBLK_PD_TRNG: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(27) | BIT(30)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(20)); break; case IMX8MP_HDMIBLK_PD_HDMI_TX: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(2) | BIT(4) | BIT(5)); regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) | BIT(18) | BIT(19) | BIT(20) | BIT(21)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(7) | BIT(10) | BIT(11)); regmap_set_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(1)); break; case IMX8MP_HDMIBLK_PD_HDMI_TX_PHY: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(7)); regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(22) | BIT(24)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(12)); regmap_clear_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(3)); break; case IMX8MP_HDMIBLK_PD_HDCP: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(11)); break; case IMX8MP_HDMIBLK_PD_HRV: regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(3) | BIT(4) | BIT(5)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(15)); break; default: break; } } static void imx8mp_hdmi_blk_ctrl_power_off(struct imx8mp_blk_ctrl *bc, struct imx8mp_blk_ctrl_domain *domain) { switch (domain->id) { case IMX8MP_HDMIBLK_PD_IRQSTEER: regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(9)); regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(16)); break; case IMX8MP_HDMIBLK_PD_LCDIF: regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(4) | BIT(5) | BIT(6)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(11)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(20)); break; case IMX8MP_HDMIBLK_PD_PAI: regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(18)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(17)); break; case IMX8MP_HDMIBLK_PD_PVI: regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(22)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(28)); break; case IMX8MP_HDMIBLK_PD_TRNG: regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(20)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(27) | BIT(30)); break; case IMX8MP_HDMIBLK_PD_HDMI_TX: regmap_clear_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(1)); regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(7) | BIT(10) | BIT(11)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) | BIT(18) | BIT(19) | BIT(20) | BIT(21)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(2) | BIT(4) | BIT(5)); break; case IMX8MP_HDMIBLK_PD_HDMI_TX_PHY: regmap_set_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(3)); regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(12)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(7)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(22) | BIT(24)); break; case IMX8MP_HDMIBLK_PD_HDCP: regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(11)); break; case IMX8MP_HDMIBLK_PD_HRV: regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(15)); regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(3) | BIT(4) | BIT(5)); break; default: break; } } static int imx8mp_hdmi_power_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct imx8mp_blk_ctrl *bc = container_of(nb, struct imx8mp_blk_ctrl, power_nb); if (action != GENPD_NOTIFY_ON) return NOTIFY_OK; /* * Contrary to other blk-ctrls the reset and clock don't clear when the * power domain is powered down. To ensure the proper reset pulsing, * first clear them all to asserted state, then enable the bus clocks * and then release the ADB reset. */ regmap_write(bc->regmap, HDMI_RTX_RESET_CTL0, 0x0); regmap_write(bc->regmap, HDMI_RTX_CLK_CTL0, 0x0); regmap_write(bc->regmap, HDMI_RTX_CLK_CTL1, 0x0); regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(0) | BIT(1) | BIT(10)); regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(0)); /* * On power up we have no software backchannel to the GPC to * wait for the ADB handshake to happen, so we just delay for a * bit. On power down the GPC driver waits for the handshake. */ udelay(5); return NOTIFY_OK; } static const struct imx8mp_blk_ctrl_domain_data imx8mp_hdmi_domain_data[] = { [IMX8MP_HDMIBLK_PD_IRQSTEER] = { .name = "hdmiblk-irqsteer", .clk_names = (const char *[]){ "apb" }, .num_clks = 1, .gpc_name = "irqsteer", }, [IMX8MP_HDMIBLK_PD_LCDIF] = { .name = "hdmiblk-lcdif", .clk_names = (const char *[]){ "axi", "apb", "fdcc" }, .num_clks = 3, .gpc_name = "lcdif", .path_names = (const char *[]){"lcdif-hdmi"}, .num_paths = 1, }, [IMX8MP_HDMIBLK_PD_PAI] = { .name = "hdmiblk-pai", .clk_names = (const char *[]){ "apb" }, .num_clks = 1, .gpc_name = "pai", }, [IMX8MP_HDMIBLK_PD_PVI] = { .name = "hdmiblk-pvi", .clk_names = (const char *[]){ "apb" }, .num_clks = 1, .gpc_name = "pvi", }, [IMX8MP_HDMIBLK_PD_TRNG] = { .name = "hdmiblk-trng", .clk_names = (const char *[]){ "apb" }, .num_clks = 1, .gpc_name = "trng", }, [IMX8MP_HDMIBLK_PD_HDMI_TX] = { .name = "hdmiblk-hdmi-tx", .clk_names = (const char *[]){ "apb", "ref_266m", "fdcc" }, .num_clks = 3, .gpc_name = "hdmi-tx", }, [IMX8MP_HDMIBLK_PD_HDMI_TX_PHY] = { .name = "hdmiblk-hdmi-tx-phy", .clk_names = (const char *[]){ "apb", "ref_24m" }, .num_clks = 2, .gpc_name = "hdmi-tx-phy", }, [IMX8MP_HDMIBLK_PD_HRV] = { .name = "hdmiblk-hrv", .clk_names = (const char *[]){ "axi", "apb" }, .num_clks = 2, .gpc_name = "hrv", .path_names = (const char *[]){"hrv"}, .num_paths = 1, }, [IMX8MP_HDMIBLK_PD_HDCP] = { .name = "hdmiblk-hdcp", .clk_names = (const char *[]){ "axi", "apb" }, .num_clks = 2, .gpc_name = "hdcp", .path_names = (const char *[]){"hdcp"}, .num_paths = 1, }, }; static const struct imx8mp_blk_ctrl_data imx8mp_hdmi_blk_ctl_dev_data = { .max_reg = 0x23c, .power_on = imx8mp_hdmi_blk_ctrl_power_on, .power_off = imx8mp_hdmi_blk_ctrl_power_off, .power_notifier_fn = imx8mp_hdmi_power_notifier, .domains = imx8mp_hdmi_domain_data, .num_domains = ARRAY_SIZE(imx8mp_hdmi_domain_data), }; static int imx8mp_blk_ctrl_power_on(struct generic_pm_domain *genpd) { struct imx8mp_blk_ctrl_domain *domain = to_imx8mp_blk_ctrl_domain(genpd); const struct imx8mp_blk_ctrl_domain_data *data = domain->data; struct imx8mp_blk_ctrl *bc = domain->bc; int ret; /* make sure bus domain is awake */ ret = pm_runtime_resume_and_get(bc->bus_power_dev); if (ret < 0) { dev_err(bc->dev, "failed to power up bus domain\n"); return ret; } /* enable upstream clocks */ ret = clk_bulk_prepare_enable(data->num_clks, domain->clks); if (ret) { dev_err(bc->dev, "failed to enable clocks\n"); goto bus_put; } /* domain specific blk-ctrl manipulation */ bc->power_on(bc, domain); /* power up upstream GPC domain */ ret = pm_runtime_resume_and_get(domain->power_dev); if (ret < 0) { dev_err(bc->dev, "failed to power up peripheral domain\n"); goto clk_disable; } ret = icc_bulk_set_bw(domain->num_paths, domain->paths); if (ret) dev_err(bc->dev, "failed to set icc bw\n"); clk_bulk_disable_unprepare(data->num_clks, domain->clks); return 0; clk_disable: clk_bulk_disable_unprepare(data->num_clks, domain->clks); bus_put: pm_runtime_put(bc->bus_power_dev); return ret; } static int imx8mp_blk_ctrl_power_off(struct generic_pm_domain *genpd) { struct imx8mp_blk_ctrl_domain *domain = to_imx8mp_blk_ctrl_domain(genpd); const struct imx8mp_blk_ctrl_domain_data *data = domain->data; struct imx8mp_blk_ctrl *bc = domain->bc; int ret; ret = clk_bulk_prepare_enable(data->num_clks, domain->clks); if (ret) { dev_err(bc->dev, "failed to enable clocks\n"); return ret; } /* domain specific blk-ctrl manipulation */ bc->power_off(bc, domain); clk_bulk_disable_unprepare(data->num_clks, domain->clks); /* power down upstream GPC domain */ pm_runtime_put(domain->power_dev); /* allow bus domain to suspend */ pm_runtime_put(bc->bus_power_dev); return 0; } static struct lock_class_key blk_ctrl_genpd_lock_class; static int imx8mp_blk_ctrl_probe(struct platform_device *pdev) { const struct imx8mp_blk_ctrl_data *bc_data; struct device *dev = &pdev->dev; struct imx8mp_blk_ctrl *bc; void __iomem *base; int num_domains, i, ret; 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); num_domains = bc_data->num_domains; 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, ®map_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, num_domains, sizeof(struct imx8mp_blk_ctrl_domain), GFP_KERNEL); if (!bc->domains) return -ENOMEM; bc->onecell_data.num_domains = num_domains; bc->onecell_data.domains = devm_kcalloc(dev, num_domains, sizeof(struct generic_pm_domain *), GFP_KERNEL); if (!bc->onecell_data.domains) return -ENOMEM; bc->bus_power_dev = dev_pm_domain_attach_by_name(dev, "bus"); if (IS_ERR(bc->bus_power_dev)) return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev), "failed to attach bus power domain\n"); bc->power_off = bc_data->power_off; bc->power_on = bc_data->power_on; for (i = 0; i < num_domains; i++) { const struct imx8mp_blk_ctrl_domain_data *data = &bc_data->domains[i]; struct imx8mp_blk_ctrl_domain *domain = &bc->domains[i]; int j; domain->data = data; domain->num_paths = data->num_paths; for (j = 0; j < data->num_clks; j++) domain->clks[j].id = data->clk_names[j]; for (j = 0; j < data->num_paths; j++) { domain->paths[j].name = data->path_names[j]; /* Fake value for now, just let ICC could configure NoC mode/priority */ domain->paths[j].avg_bw = 1; domain->paths[j].peak_bw = 1; } ret = devm_of_icc_bulk_get(dev, data->num_paths, domain->paths); if (ret) { if (ret != -EPROBE_DEFER) { dev_warn_once(dev, "Could not get interconnect paths, NoC will stay unconfigured!\n"); domain->num_paths = 0; } else { dev_err_probe(dev, ret, "failed to get noc entries\n"); goto cleanup_pds; } } 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->power_dev = dev_pm_domain_attach_by_name(dev, data->gpc_name); if (IS_ERR(domain->power_dev)) { dev_err_probe(dev, PTR_ERR(domain->power_dev), "failed to attach power domain %s\n", data->gpc_name); ret = PTR_ERR(domain->power_dev); goto cleanup_pds; } domain->genpd.name = data->name; domain->genpd.power_on = imx8mp_blk_ctrl_power_on; domain->genpd.power_off = imx8mp_blk_ctrl_power_off; domain->bc = bc; domain->id = i; ret = pm_genpd_init(&domain->genpd, NULL, true); if (ret) { dev_err_probe(dev, ret, "failed to init power domain\n"); dev_pm_domain_detach(domain->power_dev, true); goto cleanup_pds; } /* * We use runtime PM to trigger power on/off of the upstream GPC * domain, as a strict hierarchical parent/child power domain * setup doesn't allow us to meet the sequencing requirements. * This means we have nested locking of genpd locks, without the * nesting being visible at the genpd level, so we need a * separate lock class to make lockdep aware of the fact that * this are separate domain locks that can be nested without a * self-deadlock. */ lockdep_set_class(&domain->genpd.mlock, &blk_ctrl_genpd_lock_class); bc->onecell_data.domains[i] = &domain->genpd; } 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; } bc->power_nb.notifier_call = bc_data->power_notifier_fn; ret = dev_pm_genpd_add_notifier(bc->bus_power_dev, &bc->power_nb); if (ret) { dev_err_probe(dev, ret, "failed to add power notifier\n"); goto cleanup_provider; } if (bc_data->probe) { ret = bc_data->probe(bc); if (ret) goto cleanup_provider; } dev_set_drvdata(dev, bc); return 0; cleanup_provider: of_genpd_del_provider(dev->of_node); cleanup_pds: for (i--; i >= 0; i--) { pm_genpd_remove(&bc->domains[i].genpd); dev_pm_domain_detach(bc->domains[i].power_dev, true); } dev_pm_domain_detach(bc->bus_power_dev, true); return ret; } static int imx8mp_blk_ctrl_remove(struct platform_device *pdev) { struct imx8mp_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 imx8mp_blk_ctrl_domain *domain = &bc->domains[i]; pm_genpd_remove(&domain->genpd); dev_pm_domain_detach(domain->power_dev, true); } dev_pm_genpd_remove_notifier(bc->bus_power_dev); dev_pm_domain_detach(bc->bus_power_dev, true); return 0; } #ifdef CONFIG_PM_SLEEP static int imx8mp_blk_ctrl_suspend(struct device *dev) { struct imx8mp_blk_ctrl *bc = dev_get_drvdata(dev); int ret, i; /* * This may look strange, but is done so the generic PM_SLEEP code * can power down our domains and more importantly power them up again * after resume, without tripping over our usage of runtime PM to * control the upstream GPC domains. Things happen in the right order * in the system suspend/resume paths due to the device parent/child * hierarchy. */ ret = pm_runtime_get_sync(bc->bus_power_dev); if (ret < 0) { pm_runtime_put_noidle(bc->bus_power_dev); return ret; } for (i = 0; i < bc->onecell_data.num_domains; i++) { struct imx8mp_blk_ctrl_domain *domain = &bc->domains[i]; ret = pm_runtime_get_sync(domain->power_dev); if (ret < 0) { pm_runtime_put_noidle(domain->power_dev); goto out_fail; } } return 0; out_fail: for (i--; i >= 0; i--) pm_runtime_put(bc->domains[i].power_dev); pm_runtime_put(bc->bus_power_dev); return ret; } static int imx8mp_blk_ctrl_resume(struct device *dev) { struct imx8mp_blk_ctrl *bc = dev_get_drvdata(dev); int i; for (i = 0; i < bc->onecell_data.num_domains; i++) pm_runtime_put(bc->domains[i].power_dev); pm_runtime_put(bc->bus_power_dev); return 0; } #endif static const struct dev_pm_ops imx8mp_blk_ctrl_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(imx8mp_blk_ctrl_suspend, imx8mp_blk_ctrl_resume) }; static const struct of_device_id imx8mp_blk_ctrl_of_match[] = { { .compatible = "fsl,imx8mp-hsio-blk-ctrl", .data = &imx8mp_hsio_blk_ctl_dev_data, }, { .compatible = "fsl,imx8mp-hdmi-blk-ctrl", .data = &imx8mp_hdmi_blk_ctl_dev_data, }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, imx8mp_blk_ctrl_of_match); static struct platform_driver imx8mp_blk_ctrl_driver = { .probe = imx8mp_blk_ctrl_probe, .remove = imx8mp_blk_ctrl_remove, .driver = { .name = "imx8mp-blk-ctrl", .pm = &imx8mp_blk_ctrl_pm_ops, .of_match_table = imx8mp_blk_ctrl_of_match, }, }; module_platform_driver(imx8mp_blk_ctrl_driver); MODULE_LICENSE("GPL");