diff options
Diffstat (limited to 'drivers/soc/imx/imx8mp-blk-ctrl.c')
| -rw-r--r-- | drivers/soc/imx/imx8mp-blk-ctrl.c | 867 |
1 files changed, 0 insertions, 867 deletions
diff --git a/drivers/soc/imx/imx8mp-blk-ctrl.c b/drivers/soc/imx/imx8mp-blk-ctrl.c deleted file mode 100644 index 870aecc0202a..000000000000 --- a/drivers/soc/imx/imx8mp-blk-ctrl.c +++ /dev/null @@ -1,867 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ - -/* - * Copyright 2022 Pengutronix, Lucas Stach <kernel@pengutronix.de> - */ - -#include <linux/bitfield.h> -#include <linux/clk.h> -#include <linux/clk-provider.h> -#include <linux/device.h> -#include <linux/interconnect.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 <dt-bindings/power/imx8mp-power.h> - -#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 2 -#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->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" }, - .num_clks = 2, - .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" }, - .num_clks = 2, - .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"); |