diff options
Diffstat (limited to 'drivers/soc/imx/imx8m-blk-ctrl.c')
| -rw-r--r-- | drivers/soc/imx/imx8m-blk-ctrl.c | 617 |
1 files changed, 0 insertions, 617 deletions
diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-ctrl.c deleted file mode 100644 index 511e74f0db8a..000000000000 --- a/drivers/soc/imx/imx8m-blk-ctrl.c +++ /dev/null @@ -1,617 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ - -/* - * Copyright 2021 Pengutronix, Lucas Stach <kernel@pengutronix.de> - */ - -#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/imx8mm-power.h> -#include <dt-bindings/power/imx8mn-power.h> - -#define BLK_SFT_RSTN 0x0 -#define BLK_CLK_EN 0x4 -#define BLK_MIPI_RESET_DIV 0x8 /* Mini/Nano DISPLAY_BLK_CTRL only */ - -struct imx8m_blk_ctrl_domain; - -struct imx8m_blk_ctrl { - struct device *dev; - struct notifier_block power_nb; - struct device *bus_power_dev; - struct regmap *regmap; - struct imx8m_blk_ctrl_domain *domains; - struct genpd_onecell_data onecell_data; -}; - -struct imx8m_blk_ctrl_domain_data { - const char *name; - const char * const *clk_names; - int num_clks; - const char *gpc_name; - u32 rst_mask; - u32 clk_mask; - - /* - * i.MX8M Mini and Nano have a third DISPLAY_BLK_CTRL register - * which is used to control the reset for the MIPI Phy. - * Since it's only present in certain circumstances, - * an if-statement should be used before setting and clearing this - * register. - */ - u32 mipi_phy_rst_mask; -}; - -#define DOMAIN_MAX_CLKS 3 - -struct imx8m_blk_ctrl_domain { - struct generic_pm_domain genpd; - const struct imx8m_blk_ctrl_domain_data *data; - struct clk_bulk_data clks[DOMAIN_MAX_CLKS]; - struct device *power_dev; - struct imx8m_blk_ctrl *bc; -}; - -struct imx8m_blk_ctrl_data { - int max_reg; - notifier_fn_t power_notifier_fn; - const struct imx8m_blk_ctrl_domain_data *domains; - int num_domains; -}; - -static inline struct imx8m_blk_ctrl_domain * -to_imx8m_blk_ctrl_domain(struct generic_pm_domain *genpd) -{ - return container_of(genpd, struct imx8m_blk_ctrl_domain, genpd); -} - -static int imx8m_blk_ctrl_power_on(struct generic_pm_domain *genpd) -{ - struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd); - const struct imx8m_blk_ctrl_domain_data *data = domain->data; - struct imx8m_blk_ctrl *bc = domain->bc; - int ret; - - /* make sure bus domain is awake */ - ret = pm_runtime_get_sync(bc->bus_power_dev); - if (ret < 0) { - pm_runtime_put_noidle(bc->bus_power_dev); - dev_err(bc->dev, "failed to power up bus domain\n"); - return ret; - } - - /* put devices into reset */ - regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); - if (data->mipi_phy_rst_mask) - regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); - - /* enable upstream and blk-ctrl clocks to allow reset to propagate */ - ret = clk_bulk_prepare_enable(data->num_clks, domain->clks); - if (ret) { - dev_err(bc->dev, "failed to enable clocks\n"); - goto bus_put; - } - regmap_set_bits(bc->regmap, BLK_CLK_EN, data->clk_mask); - - /* power up upstream GPC domain */ - ret = pm_runtime_get_sync(domain->power_dev); - if (ret < 0) { - dev_err(bc->dev, "failed to power up peripheral domain\n"); - goto clk_disable; - } - - /* wait for reset to propagate */ - udelay(5); - - /* release reset */ - regmap_set_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); - if (data->mipi_phy_rst_mask) - regmap_set_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); - - /* disable upstream clocks */ - 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 imx8m_blk_ctrl_power_off(struct generic_pm_domain *genpd) -{ - struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd); - const struct imx8m_blk_ctrl_domain_data *data = domain->data; - struct imx8m_blk_ctrl *bc = domain->bc; - - /* put devices into reset and disable clocks */ - if (data->mipi_phy_rst_mask) - regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask); - - regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); - regmap_clear_bits(bc->regmap, BLK_CLK_EN, data->clk_mask); - - /* 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 generic_pm_domain * -imx8m_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 struct lock_class_key blk_ctrl_genpd_lock_class; - -static int imx8m_blk_ctrl_probe(struct platform_device *pdev) -{ - const struct imx8m_blk_ctrl_data *bc_data; - struct device *dev = &pdev->dev; - struct imx8m_blk_ctrl *bc; - void __iomem *base; - int 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); - - 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, bc_data->num_domains, - sizeof(struct imx8m_blk_ctrl_domain), - GFP_KERNEL); - if (!bc->domains) - return -ENOMEM; - - bc->onecell_data.num_domains = bc_data->num_domains; - bc->onecell_data.xlate = imx8m_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; - - bc->bus_power_dev = genpd_dev_pm_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 power domain\n"); - - for (i = 0; i < bc_data->num_domains; i++) { - const struct imx8m_blk_ctrl_domain_data *data = &bc_data->domains[i]; - struct imx8m_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->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\n"); - ret = PTR_ERR(domain->power_dev); - goto cleanup_pds; - } - - domain->genpd.name = data->name; - domain->genpd.power_on = imx8m_blk_ctrl_power_on; - domain->genpd.power_off = imx8m_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"); - 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; - } - - 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 imx8m_blk_ctrl_remove(struct platform_device *pdev) -{ - struct imx8m_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 imx8m_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 imx8m_blk_ctrl_suspend(struct device *dev) -{ - struct imx8m_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 imx8m_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 imx8m_blk_ctrl_resume(struct device *dev) -{ - struct imx8m_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 imx8m_blk_ctrl_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(imx8m_blk_ctrl_suspend, imx8m_blk_ctrl_resume) -}; - -static int imx8mm_vpu_power_notifier(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, - power_nb); - - if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) - return NOTIFY_OK; - - /* - * The ADB in the VPUMIX domain has no separate reset and clock - * enable bits, but is ungated together with the VPU clocks. To - * allow the handshake with the GPC to progress we put the VPUs - * in reset and ungate the clocks. - */ - regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1) | BIT(2)); - regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1) | BIT(2)); - - if (action == GENPD_NOTIFY_ON) { - /* - * 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); - - /* set "fuse" bits to enable the VPUs */ - regmap_set_bits(bc->regmap, 0x8, 0xffffffff); - regmap_set_bits(bc->regmap, 0xc, 0xffffffff); - regmap_set_bits(bc->regmap, 0x10, 0xffffffff); - regmap_set_bits(bc->regmap, 0x14, 0xffffffff); - } - - return NOTIFY_OK; -} - -static const struct imx8m_blk_ctrl_domain_data imx8mm_vpu_blk_ctl_domain_data[] = { - [IMX8MM_VPUBLK_PD_G1] = { - .name = "vpublk-g1", - .clk_names = (const char *[]){ "g1", }, - .num_clks = 1, - .gpc_name = "g1", - .rst_mask = BIT(1), - .clk_mask = BIT(1), - }, - [IMX8MM_VPUBLK_PD_G2] = { - .name = "vpublk-g2", - .clk_names = (const char *[]){ "g2", }, - .num_clks = 1, - .gpc_name = "g2", - .rst_mask = BIT(0), - .clk_mask = BIT(0), - }, - [IMX8MM_VPUBLK_PD_H1] = { - .name = "vpublk-h1", - .clk_names = (const char *[]){ "h1", }, - .num_clks = 1, - .gpc_name = "h1", - .rst_mask = BIT(2), - .clk_mask = BIT(2), - }, -}; - -static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = { - .max_reg = 0x18, - .power_notifier_fn = imx8mm_vpu_power_notifier, - .domains = imx8mm_vpu_blk_ctl_domain_data, - .num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data), -}; - -static int imx8mm_disp_power_notifier(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, - power_nb); - - if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) - return NOTIFY_OK; - - /* Enable bus clock and deassert bus reset */ - regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12)); - regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6)); - - /* - * 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. - */ - if (action == GENPD_NOTIFY_ON) - udelay(5); - - - return NOTIFY_OK; -} - -static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = { - [IMX8MM_DISPBLK_PD_CSI_BRIDGE] = { - .name = "dispblk-csi-bridge", - .clk_names = (const char *[]){ "csi-bridge-axi", "csi-bridge-apb", - "csi-bridge-core", }, - .num_clks = 3, - .gpc_name = "csi-bridge", - .rst_mask = BIT(0) | BIT(1) | BIT(2), - .clk_mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5), - }, - [IMX8MM_DISPBLK_PD_LCDIF] = { - .name = "dispblk-lcdif", - .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", }, - .num_clks = 3, - .gpc_name = "lcdif", - .clk_mask = BIT(6) | BIT(7), - }, - [IMX8MM_DISPBLK_PD_MIPI_DSI] = { - .name = "dispblk-mipi-dsi", - .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", }, - .num_clks = 2, - .gpc_name = "mipi-dsi", - .rst_mask = BIT(5), - .clk_mask = BIT(8) | BIT(9), - .mipi_phy_rst_mask = BIT(17), - }, - [IMX8MM_DISPBLK_PD_MIPI_CSI] = { - .name = "dispblk-mipi-csi", - .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" }, - .num_clks = 2, - .gpc_name = "mipi-csi", - .rst_mask = BIT(3) | BIT(4), - .clk_mask = BIT(10) | BIT(11), - .mipi_phy_rst_mask = BIT(16), - }, -}; - -static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = { - .max_reg = 0x2c, - .power_notifier_fn = imx8mm_disp_power_notifier, - .domains = imx8mm_disp_blk_ctl_domain_data, - .num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data), -}; - - -static int imx8mn_disp_power_notifier(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl, - power_nb); - - if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF) - return NOTIFY_OK; - - /* Enable bus clock and deassert bus reset */ - regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(8)); - regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(8)); - - /* - * 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. - */ - if (action == GENPD_NOTIFY_ON) - udelay(5); - - - return NOTIFY_OK; -} - -static const struct imx8m_blk_ctrl_domain_data imx8mn_disp_blk_ctl_domain_data[] = { - [IMX8MN_DISPBLK_PD_MIPI_DSI] = { - .name = "dispblk-mipi-dsi", - .clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", }, - .num_clks = 2, - .gpc_name = "mipi-dsi", - .rst_mask = BIT(0) | BIT(1), - .clk_mask = BIT(0) | BIT(1), - .mipi_phy_rst_mask = BIT(17), - }, - [IMX8MN_DISPBLK_PD_MIPI_CSI] = { - .name = "dispblk-mipi-csi", - .clk_names = (const char *[]){ "csi-aclk", "csi-pclk" }, - .num_clks = 2, - .gpc_name = "mipi-csi", - .rst_mask = BIT(2) | BIT(3), - .clk_mask = BIT(2) | BIT(3), - .mipi_phy_rst_mask = BIT(16), - }, - [IMX8MN_DISPBLK_PD_LCDIF] = { - .name = "dispblk-lcdif", - .clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", }, - .num_clks = 3, - .gpc_name = "lcdif", - .rst_mask = BIT(4) | BIT(5), - .clk_mask = BIT(4) | BIT(5), - }, - [IMX8MN_DISPBLK_PD_ISI] = { - .name = "dispblk-isi", - .clk_names = (const char *[]){ "disp_axi", "disp_apb", "disp_axi_root", - "disp_apb_root"}, - .num_clks = 4, - .gpc_name = "isi", - .rst_mask = BIT(6) | BIT(7), - .clk_mask = BIT(6) | BIT(7), - }, -}; - -static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = { - .max_reg = 0x84, - .power_notifier_fn = imx8mn_disp_power_notifier, - .domains = imx8mn_disp_blk_ctl_domain_data, - .num_domains = ARRAY_SIZE(imx8mn_disp_blk_ctl_domain_data), -}; - -static const struct of_device_id imx8m_blk_ctrl_of_match[] = { - { - .compatible = "fsl,imx8mm-vpu-blk-ctrl", - .data = &imx8mm_vpu_blk_ctl_dev_data - }, { - .compatible = "fsl,imx8mm-disp-blk-ctrl", - .data = &imx8mm_disp_blk_ctl_dev_data - }, { - .compatible = "fsl,imx8mn-disp-blk-ctrl", - .data = &imx8mn_disp_blk_ctl_dev_data - }, { - /* Sentinel */ - } -}; -MODULE_DEVICE_TABLE(of, imx8m_blk_ctrl_of_match); - -static struct platform_driver imx8m_blk_ctrl_driver = { - .probe = imx8m_blk_ctrl_probe, - .remove = imx8m_blk_ctrl_remove, - .driver = { - .name = "imx8m-blk-ctrl", - .pm = &imx8m_blk_ctrl_pm_ops, - .of_match_table = imx8m_blk_ctrl_of_match, - }, -}; -module_platform_driver(imx8m_blk_ctrl_driver); |