| Message ID | 20210522134249.15322-4-peng.fan@oss.nxp.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | soc: imx: add i.MX BLK-CTL support | expand |
On Sat, May 22, 2021 at 09:42:48PM +0800, Peng Fan (OSS) wrote: > From: Peng Fan <peng.fan@nxp.com> > > The i.MX8MM introduces an IP named BLK_CTL and usually is comprised of > some GPRs. > > The GPRs has some clock bits and reset bits, but here we take it > as virtual PDs, because of the clock and power domain A/B lock issue > when taking it as a clock controller. > > For some bits, it might be good to also make it as a reset controller, > but to i.MX8MM, we not add that support for now. > > Signed-off-by: Peng Fan <peng.fan@nxp.com> I would like to see some Reviewed-by tags. > --- > drivers/soc/imx/Makefile | 2 +- > drivers/soc/imx/blk-ctl.c | 334 ++++++++++++++++++++++++++++++++++++++ > drivers/soc/imx/blk-ctl.h | 85 ++++++++++ > 3 files changed, 420 insertions(+), 1 deletion(-) > create mode 100644 drivers/soc/imx/blk-ctl.c > create mode 100644 drivers/soc/imx/blk-ctl.h > > diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile > index 078dc918f4f3..d3d2b49a386c 100644 > --- a/drivers/soc/imx/Makefile > +++ b/drivers/soc/imx/Makefile > @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o > endif > obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o > obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o > -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o > +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o As it's a generic blk-ctl driver, should we have a dedicated Kconfig option for it? > diff --git a/drivers/soc/imx/blk-ctl.c b/drivers/soc/imx/blk-ctl.c > new file mode 100644 > index 000000000000..8e286b8ef1b3 > --- /dev/null > +++ b/drivers/soc/imx/blk-ctl.c > @@ -0,0 +1,334 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright 2021 NXP. > + */ > + > +#include <linux/clk.h> > +#include <linux/completion.h> > +#include <linux/err.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > +#include <linux/regmap.h> > +#include <linux/slab.h> > +#include <linux/string.h> > +#include <linux/types.h> > +#include <linux/pm_domain.h> > +#include <linux/reset-controller.h> Some of the includes are out of alphabetic order. Also please check if you need all of these headers. > + > +#include "blk-ctl.h" > + > +static inline struct imx_blk_ctl_domain *to_imx_blk_ctl_pd(struct generic_pm_domain *genpd) Did you run checkpatch on it? Isn't this line beyond 80 column? > +{ > + return container_of(genpd, struct imx_blk_ctl_domain, genpd); > +} > + > +static int imx_blk_ctl_enable_hsk(struct device *dev) > +{ > + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); > + const struct imx_blk_ctl_hw *hw = blk_ctl->dev_data->hw_hsk; > + struct regmap *regmap = blk_ctl->regmap; > + int ret; > + > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask); > + if (ret) > + return ret; > + } > + > + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); > + > + /* Wait for handshake */ > + udelay(5); > + > + return ret; > +} > + > +int imx_blk_ctl_power_on(struct generic_pm_domain *domain) static? > +{ > + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); > + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; > + struct regmap *regmap = blk_ctl->regmap; > + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; > + int ret; > + > + mutex_lock(&blk_ctl->lock); > + > + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); > + if (ret) { > + mutex_unlock(&blk_ctl->lock); > + return ret; > + } > + > + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { > + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); > + if (ret) > + dev_err(blk_ctl->dev, "Hankshake failed when power on\n"); > + > + goto disable_clk; Goto disable_clk regardless of the ret check? > + } > + > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > + ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask); > + if (ret) > + goto disable_clk; > + } > + > + /* Wait for reset propagate */ > + udelay(5); The delay will be there even when IMX_BLK_CTL_PD_RESET is not set. > + > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask); > + if (ret) > + goto disable_clk; > + } > + > + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); > + if (ret) > + goto disable_clk; Useless goto. > + > +disable_clk: > + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); > + > + mutex_unlock(&blk_ctl->lock); > + > + return ret; > +} > + > +int imx_blk_ctl_power_off(struct generic_pm_domain *domain) > +{ > + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); > + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; > + struct regmap *regmap = blk_ctl->regmap; > + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; > + int ret; > + > + mutex_lock(&blk_ctl->lock); > + > + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); > + if (ret) { > + mutex_unlock(&blk_ctl->lock); > + return ret; > + } > + > + if (!(hw->flags & IMX_BLK_CTL_PD_HANDSHAKE)) { > + ret = regmap_clear_bits(regmap, hw->offset, hw->mask); > + if (ret) > + goto hsk_fail; > + > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > + ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask); > + if (ret) > + goto hsk_fail; > + } > + } > + > + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { > + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); > + if (ret) > + dev_err(blk_ctl->dev, "Hankshake failed when power off\n"); > + } > + > +hsk_fail: You use disable_clk in above function for the same code. Inconsistent labeling strategy. > + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); > + > + mutex_unlock(&blk_ctl->lock); > + > + return ret; > +} > + > +static int imx_blk_ctl_probe(struct platform_device *pdev) > +{ > + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; > + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; > + struct generic_pm_domain *parent_genpd; > + struct device *dev = &pdev->dev; > + struct device *active_pd; > + int ret; > + > + pdev->dev.of_node = blk_ctl->dev->of_node; Have a newline. > + if (domain->hw->active_pd_name) { > + active_pd = dev_pm_domain_attach_by_name(dev, domain->hw->active_pd_name); > + if (IS_ERR_OR_NULL(active_pd)) { > + ret = PTR_ERR(active_pd) ? : -ENODATA; > + pdev->dev.of_node = NULL; Why is this necessary? > + return ret; > + } Have a newline. > + domain->active_pd = active_pd; > + } else { > + if (!blk_ctl->bus_domain) { > + pdev->dev.of_node = NULL; > + return -EPROBE_DEFER; > + } > + } > + > + if (domain->hw->active_pd_name) > + parent_genpd = pd_to_genpd(active_pd->pm_domain); > + else > + parent_genpd = blk_ctl->bus_domain; > + > + if (pm_genpd_add_subdomain(parent_genpd, &domain->genpd)) { > + pr_warn("failed to add subdomain: %s\n", domain->genpd.name); dev_warn()? > + } else { > + mutex_lock(&blk_ctl->lock); > + domain->hooked = true; > + mutex_unlock(&blk_ctl->lock); > + } > + > + return 0; > +} > + > +static int imx_blk_ctl_remove(struct platform_device *pdev) > +{ > + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; > + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; > + struct generic_pm_domain *parent_genpd; > + struct device *active_pd; > + > + pdev->dev.of_node = blk_ctl->dev->of_node; Why is this needed for .remove? I stop right here. The patch really needs some level cross reviewing. Shawn > + if (domain->hw->active_pd_name) > + parent_genpd = pd_to_genpd(active_pd->pm_domain); > + else > + parent_genpd = blk_ctl->bus_domain; > + > + pm_genpd_remove_subdomain(parent_genpd, &domain->genpd); > + > + mutex_lock(&blk_ctl->lock); > + domain->hooked = false; > + mutex_unlock(&blk_ctl->lock); > + > + if (domain->hw->active_pd_name) > + dev_pm_domain_detach(domain->active_pd, false); > + > + return 0; > +} > + > +static const struct platform_device_id imx_blk_ctl_id[] = { > + { "imx-vpumix-blk-ctl", }, > + { "imx-dispmix-blk-ctl", }, > + { }, > +}; > + > +static struct platform_driver imx_blk_ctl_driver = { > + .driver = { > + .name = "imx-blk-ctl", > + }, > + .probe = imx_blk_ctl_probe, > + .remove = imx_blk_ctl_remove, > + .id_table = imx_blk_ctl_id, > +}; > +builtin_platform_driver(imx_blk_ctl_driver) > + > +static struct generic_pm_domain *imx_blk_ctl_genpd_xlate(struct of_phandle_args *genpdspec, > + void *data) > +{ > + struct genpd_onecell_data *genpd_data = data; > + unsigned int idx = genpdspec->args[0]; > + struct imx_blk_ctl_domain *domain; > + struct generic_pm_domain *genpd = ERR_PTR(-EPROBE_DEFER); > + > + if (genpdspec->args_count != 1) > + return ERR_PTR(-EINVAL); > + > + if (idx >= genpd_data->num_domains) { > + pr_err("%s: invalid domain index %u\n", __func__, idx); > + return ERR_PTR(-EINVAL); > + } > + > + if (!genpd_data->domains[idx]) > + return ERR_PTR(-ENOENT); > + > + domain = to_imx_blk_ctl_pd(genpd_data->domains[idx]); > + mutex_lock(&domain->blk_ctl->lock); > + if (domain->hooked) > + genpd = genpd_data->domains[idx]; > + mutex_unlock(&domain->blk_ctl->lock); > + > + return genpd; > +} > + > +int imx_blk_ctl_register(struct device *dev) > +{ > + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); > + const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data; > + int num = dev_data->pds_num; > + struct imx_blk_ctl_domain *domain; > + struct generic_pm_domain *genpd; > + struct platform_device *pd_pdev; > + int domain_index; > + int i, ret; > + > + blk_ctl->onecell_data.num_domains = num; > + blk_ctl->onecell_data.xlate = imx_blk_ctl_genpd_xlate; > + blk_ctl->onecell_data.domains = devm_kcalloc(dev, num, sizeof(struct generic_pm_domain *), > + GFP_KERNEL); > + if (!blk_ctl->onecell_data.domains) > + return -ENOMEM; > + > + for (i = 0; i < num; i++) { > + domain_index = dev_data->pds[i].id; > + if (domain_index >= num) { > + dev_warn(dev, "Domain index %d is out of bounds\n", domain_index); > + continue; > + } > + > + domain = devm_kzalloc(dev, sizeof(struct imx_blk_ctl_domain), GFP_KERNEL); > + if (!domain) > + goto error; > + > + pd_pdev = platform_device_alloc(dev_data->name, domain_index); > + if (!pd_pdev) { > + dev_err(dev, "Failed to allocate platform device\n"); > + goto error; > + } > + > + pd_pdev->dev.platform_data = domain; > + > + domain->blk_ctl = blk_ctl; > + domain->hw = &dev_data->pds[i]; > + domain->id = domain_index; > + domain->genpd.name = dev_data->pds[i].name; > + domain->genpd.power_off = imx_blk_ctl_power_off; > + domain->genpd.power_on = imx_blk_ctl_power_on; > + domain->dev = &pd_pdev->dev; > + domain->hooked = false; > + > + ret = pm_genpd_init(&domain->genpd, NULL, true); > + pd_pdev->dev.parent = dev; > + > + if (domain->hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) > + blk_ctl->bus_domain = &domain->genpd; > + > + ret = platform_device_add(pd_pdev); > + if (ret) { > + platform_device_put(pd_pdev); > + goto error; > + } > + blk_ctl->onecell_data.domains[i] = &domain->genpd; > + } > + > + return of_genpd_add_provider_onecell(dev->of_node, &blk_ctl->onecell_data); > + > +error: > + for (; i >= 0; i--) { > + genpd = blk_ctl->onecell_data.domains[i]; > + if (!genpd) > + continue; > + domain = to_imx_blk_ctl_pd(genpd); > + if (domain->dev) > + platform_device_put(to_platform_device(domain->dev)); > + } > + return ret; > +} > +EXPORT_SYMBOL_GPL(imx_blk_ctl_register); > + > +const struct dev_pm_ops imx_blk_ctl_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > + pm_runtime_force_resume) > +}; > +EXPORT_SYMBOL_GPL(imx_blk_ctl_pm_ops); > diff --git a/drivers/soc/imx/blk-ctl.h b/drivers/soc/imx/blk-ctl.h > new file mode 100644 > index 000000000000..6780d00ec8c5 > --- /dev/null > +++ b/drivers/soc/imx/blk-ctl.h > @@ -0,0 +1,85 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef __SOC_IMX_BLK_CTL_H > +#define __SOC_IMX_BLK_CTL_H > + > +enum imx_blk_ctl_pd_type { > + BLK_CTL_PD, > +}; > + > +struct imx_blk_ctl_hw { > + int type; > + char *name; > + char *active_pd_name; > + u32 offset; > + u32 mask; > + u32 flags; > + u32 id; > + u32 rst_offset; > + u32 rst_mask; > + u32 errata; > +}; > + > +struct imx_blk_ctl_domain { > + struct generic_pm_domain genpd; > + struct device *active_pd; > + struct imx_blk_ctl *blk_ctl; > + struct imx_blk_ctl_hw *hw; > + struct device *dev; > + bool hooked; > + u32 id; > +}; > + > +struct imx_blk_ctl_dev_data { > + struct regmap_config config; > + struct imx_blk_ctl_hw *pds; > + struct imx_blk_ctl_hw *hw_hsk; > + u32 pds_num; > + u32 max_num; > + char *name; > +}; > + > +struct imx_blk_ctl { > + struct device *dev; > + struct regmap *regmap; > + struct genpd_onecell_data onecell_data; > + const struct imx_blk_ctl_dev_data *dev_data; > + struct clk_bulk_data *clks; > + u32 num_clks; > + struct generic_pm_domain *bus_domain; > + > + struct mutex lock; > +}; > + > +#define IMX_BLK_CTL(_type, _name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, \ > + _flags, _errata) \ > + { \ > + .type = _type, \ > + .name = _name, \ > + .active_pd_name = _active_pd, \ > + .id = _id, \ > + .offset = _offset, \ > + .mask = _mask, \ > + .flags = _flags, \ > + .rst_offset = _rst_offset, \ > + .rst_mask = _rst_mask, \ > + .errata = _errata, \ > + } > + > +#define IMX_BLK_CTL_PD(_name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, _flags) \ > + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, _rst_offset, \ > + _rst_mask, _flags, 0) > + > +#define IMX_BLK_CTL_PD_ERRATA(_name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, \ > + _flags, _errata) \ > + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, _rst_offset, \ > + _rst_mask, _flags, _errata) > + > +int imx_blk_ctl_register(struct device *dev); > + > +#define IMX_BLK_CTL_PD_HANDSHAKE BIT(0) > +#define IMX_BLK_CTL_PD_RESET BIT(1) > +#define IMX_BLK_CTL_PD_BUS BIT(2) > + > +const extern struct dev_pm_ops imx_blk_ctl_pm_ops; > + > +#endif > -- > 2.30.0 >
> Subject: Re: [PATCH V6 3/4] soc: imx: Add generic blk-ctl driver > > On Sat, May 22, 2021 at 09:42:48PM +0800, Peng Fan (OSS) wrote: > > From: Peng Fan <peng.fan@nxp.com> > > > > The i.MX8MM introduces an IP named BLK_CTL and usually is comprised of > > some GPRs. > > > > The GPRs has some clock bits and reset bits, but here we take it as > > virtual PDs, because of the clock and power domain A/B lock issue when > > taking it as a clock controller. > > > > For some bits, it might be good to also make it as a reset controller, > > but to i.MX8MM, we not add that support for now. > > > > Signed-off-by: Peng Fan <peng.fan@nxp.com> > > I would like to see some Reviewed-by tags. ok > > > --- > > drivers/soc/imx/Makefile | 2 +- > > drivers/soc/imx/blk-ctl.c | 334 > > ++++++++++++++++++++++++++++++++++++++ > > drivers/soc/imx/blk-ctl.h | 85 ++++++++++ > > 3 files changed, 420 insertions(+), 1 deletion(-) create mode 100644 > > drivers/soc/imx/blk-ctl.c create mode 100644 > > drivers/soc/imx/blk-ctl.h > > > > diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile index > > 078dc918f4f3..d3d2b49a386c 100644 > > --- a/drivers/soc/imx/Makefile > > +++ b/drivers/soc/imx/Makefile > > @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o endif > > obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o > > obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o > > -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o > > +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o > > As it's a generic blk-ctl driver, should we have a dedicated Kconfig option for > it? I think no need a dedicated Kconfig option, It is almost a must have driver for i.MX8M. > > > diff --git a/drivers/soc/imx/blk-ctl.c b/drivers/soc/imx/blk-ctl.c new > > file mode 100644 index 000000000000..8e286b8ef1b3 > > --- /dev/null > > +++ b/drivers/soc/imx/blk-ctl.c > > @@ -0,0 +1,334 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Copyright 2021 NXP. > > + */ > > + > > +#include <linux/clk.h> > > +#include <linux/completion.h> > > +#include <linux/err.h> > > +#include <linux/io.h> > > +#include <linux/module.h> > > +#include <linux/mutex.h> > > +#include <linux/of.h> > > +#include <linux/of_address.h> > > +#include <linux/of_device.h> > > +#include <linux/platform_device.h> > > +#include <linux/pm_runtime.h> > > +#include <linux/regmap.h> > > +#include <linux/slab.h> > > +#include <linux/string.h> > > +#include <linux/types.h> > > +#include <linux/pm_domain.h> > > +#include <linux/reset-controller.h> > > Some of the includes are out of alphabetic order. Also please check if you > need all of these headers. Fix in V7. > > > + > > +#include "blk-ctl.h" > > + > > +static inline struct imx_blk_ctl_domain *to_imx_blk_ctl_pd(struct > > +generic_pm_domain *genpd) > > Did you run checkpatch on it? Isn't this line beyond 80 column? Yes. I ran, kernel new rule has been 100 column as I know. > > > +{ > > + return container_of(genpd, struct imx_blk_ctl_domain, genpd); } > > + > > +static int imx_blk_ctl_enable_hsk(struct device *dev) { > > + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); > > + const struct imx_blk_ctl_hw *hw = blk_ctl->dev_data->hw_hsk; > > + struct regmap *regmap = blk_ctl->regmap; > > + int ret; > > + > > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > > + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, > hw->rst_mask); > > + if (ret) > > + return ret; > > + } > > + > > + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); > > + > > + /* Wait for handshake */ > > + udelay(5); > > + > > + return ret; > > +} > > + > > +int imx_blk_ctl_power_on(struct generic_pm_domain *domain) > > static? Fix in v7. > > > +{ > > + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); > > + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; > > + struct regmap *regmap = blk_ctl->regmap; > > + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; > > + int ret; > > + > > + mutex_lock(&blk_ctl->lock); > > + > > + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); > > + if (ret) { > > + mutex_unlock(&blk_ctl->lock); > > + return ret; > > + } > > + > > + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { > > + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); > > + if (ret) > > + dev_err(blk_ctl->dev, "Hankshake failed when power on\n"); > > + > > + goto disable_clk; > > Goto disable_clk regardless of the ret check? Oh, this was introduced in v6, fix in V7. > > > + } > > + > > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > > + ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask); > > + if (ret) > > + goto disable_clk; > > + } > > + > > + /* Wait for reset propagate */ > > + udelay(5); > > The delay will be there even when IMX_BLK_CTL_PD_RESET is not set. Fix in V7. > > > + > > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > > + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, > hw->rst_mask); > > + if (ret) > > + goto disable_clk; > > + } > > + > > + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); > > + if (ret) > > + goto disable_clk; > > Useless goto. Fix in V7. > > > + > > +disable_clk: > > + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); > > + > > + mutex_unlock(&blk_ctl->lock); > > + > > + return ret; > > +} > > + > > +int imx_blk_ctl_power_off(struct generic_pm_domain *domain) { > > + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); > > + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; > > + struct regmap *regmap = blk_ctl->regmap; > > + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; > > + int ret; > > + > > + mutex_lock(&blk_ctl->lock); > > + > > + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); > > + if (ret) { > > + mutex_unlock(&blk_ctl->lock); > > + return ret; > > + } > > + > > + if (!(hw->flags & IMX_BLK_CTL_PD_HANDSHAKE)) { > > + ret = regmap_clear_bits(regmap, hw->offset, hw->mask); > > + if (ret) > > + goto hsk_fail; > > + > > + if (hw->flags & IMX_BLK_CTL_PD_RESET) { > > + ret = regmap_clear_bits(regmap, hw->rst_offset, > hw->rst_mask); > > + if (ret) > > + goto hsk_fail; > > + } > > + } > > + > > + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { > > + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); > > + if (ret) > > + dev_err(blk_ctl->dev, "Hankshake failed when power off\n"); > > + } > > + > > +hsk_fail: > > You use disable_clk in above function for the same code. Inconsistent > labeling strategy. Fix in V7. > > > + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); > > + > > + mutex_unlock(&blk_ctl->lock); > > + > > + return ret; > > +} > > + > > +static int imx_blk_ctl_probe(struct platform_device *pdev) { > > + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; > > + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; > > + struct generic_pm_domain *parent_genpd; > > + struct device *dev = &pdev->dev; > > + struct device *active_pd; > > + int ret; > > + > > + pdev->dev.of_node = blk_ctl->dev->of_node; > > Have a newline. Fix in V7. > > > + if (domain->hw->active_pd_name) { > > + active_pd = dev_pm_domain_attach_by_name(dev, > domain->hw->active_pd_name); > > + if (IS_ERR_OR_NULL(active_pd)) { > > + ret = PTR_ERR(active_pd) ? : -ENODATA; > > + pdev->dev.of_node = NULL; > > Why is this necessary? This is to avoid blk-ctl match with is parent's device driver, if it use same dt node. > > > + return ret; > > + } > > Have a newline. > > > + domain->active_pd = active_pd; > > + } else { > > + if (!blk_ctl->bus_domain) { > > + pdev->dev.of_node = NULL; > > + return -EPROBE_DEFER; > > + } > > + } > > + > > + if (domain->hw->active_pd_name) > > + parent_genpd = pd_to_genpd(active_pd->pm_domain); > > + else > > + parent_genpd = blk_ctl->bus_domain; > > + > > + if (pm_genpd_add_subdomain(parent_genpd, &domain->genpd)) { > > + pr_warn("failed to add subdomain: %s\n", domain->genpd.name); > > dev_warn()? > > > + } else { > > + mutex_lock(&blk_ctl->lock); > > + domain->hooked = true; > > + mutex_unlock(&blk_ctl->lock); > > + } > > + > > + return 0; > > +} > > + > > +static int imx_blk_ctl_remove(struct platform_device *pdev) { > > + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; > > + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; > > + struct generic_pm_domain *parent_genpd; > > + struct device *active_pd; > > + > > + pdev->dev.of_node = blk_ctl->dev->of_node; > > Why is this needed for .remove? Fix in v7. > > I stop right here. The patch really needs some level cross reviewing. ok, we are almost done in V5, but have to introduce a new design in V6. I'll try to invite someone to help review. Thanks, Peng. > > Shawn > > > + if (domain->hw->active_pd_name) > > + parent_genpd = pd_to_genpd(active_pd->pm_domain); > > + else > > + parent_genpd = blk_ctl->bus_domain; > > + > > + pm_genpd_remove_subdomain(parent_genpd, &domain->genpd); > > + > > + mutex_lock(&blk_ctl->lock); > > + domain->hooked = false; > > + mutex_unlock(&blk_ctl->lock); > > + > > + if (domain->hw->active_pd_name) > > + dev_pm_domain_detach(domain->active_pd, false); > > + > > + return 0; > > +} > > + > > +static const struct platform_device_id imx_blk_ctl_id[] = { > > + { "imx-vpumix-blk-ctl", }, > > + { "imx-dispmix-blk-ctl", }, > > + { }, > > +}; > > + > > +static struct platform_driver imx_blk_ctl_driver = { > > + .driver = { > > + .name = "imx-blk-ctl", > > + }, > > + .probe = imx_blk_ctl_probe, > > + .remove = imx_blk_ctl_remove, > > + .id_table = imx_blk_ctl_id, > > +}; > > +builtin_platform_driver(imx_blk_ctl_driver) > > + > > +static struct generic_pm_domain *imx_blk_ctl_genpd_xlate(struct > of_phandle_args *genpdspec, > > + void *data) > > +{ > > + struct genpd_onecell_data *genpd_data = data; > > + unsigned int idx = genpdspec->args[0]; > > + struct imx_blk_ctl_domain *domain; > > + struct generic_pm_domain *genpd = ERR_PTR(-EPROBE_DEFER); > > + > > + if (genpdspec->args_count != 1) > > + return ERR_PTR(-EINVAL); > > + > > + if (idx >= genpd_data->num_domains) { > > + pr_err("%s: invalid domain index %u\n", __func__, idx); > > + return ERR_PTR(-EINVAL); > > + } > > + > > + if (!genpd_data->domains[idx]) > > + return ERR_PTR(-ENOENT); > > + > > + domain = to_imx_blk_ctl_pd(genpd_data->domains[idx]); > > + mutex_lock(&domain->blk_ctl->lock); > > + if (domain->hooked) > > + genpd = genpd_data->domains[idx]; > > + mutex_unlock(&domain->blk_ctl->lock); > > + > > + return genpd; > > +} > > + > > +int imx_blk_ctl_register(struct device *dev) { > > + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); > > + const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data; > > + int num = dev_data->pds_num; > > + struct imx_blk_ctl_domain *domain; > > + struct generic_pm_domain *genpd; > > + struct platform_device *pd_pdev; > > + int domain_index; > > + int i, ret; > > + > > + blk_ctl->onecell_data.num_domains = num; > > + blk_ctl->onecell_data.xlate = imx_blk_ctl_genpd_xlate; > > + blk_ctl->onecell_data.domains = devm_kcalloc(dev, num, sizeof(struct > generic_pm_domain *), > > + GFP_KERNEL); > > + if (!blk_ctl->onecell_data.domains) > > + return -ENOMEM; > > + > > + for (i = 0; i < num; i++) { > > + domain_index = dev_data->pds[i].id; > > + if (domain_index >= num) { > > + dev_warn(dev, "Domain index %d is out of bounds\n", > domain_index); > > + continue; > > + } > > + > > + domain = devm_kzalloc(dev, sizeof(struct imx_blk_ctl_domain), > GFP_KERNEL); > > + if (!domain) > > + goto error; > > + > > + pd_pdev = platform_device_alloc(dev_data->name, domain_index); > > + if (!pd_pdev) { > > + dev_err(dev, "Failed to allocate platform device\n"); > > + goto error; > > + } > > + > > + pd_pdev->dev.platform_data = domain; > > + > > + domain->blk_ctl = blk_ctl; > > + domain->hw = &dev_data->pds[i]; > > + domain->id = domain_index; > > + domain->genpd.name = dev_data->pds[i].name; > > + domain->genpd.power_off = imx_blk_ctl_power_off; > > + domain->genpd.power_on = imx_blk_ctl_power_on; > > + domain->dev = &pd_pdev->dev; > > + domain->hooked = false; > > + > > + ret = pm_genpd_init(&domain->genpd, NULL, true); > > + pd_pdev->dev.parent = dev; > > + > > + if (domain->hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) > > + blk_ctl->bus_domain = &domain->genpd; > > + > > + ret = platform_device_add(pd_pdev); > > + if (ret) { > > + platform_device_put(pd_pdev); > > + goto error; > > + } > > + blk_ctl->onecell_data.domains[i] = &domain->genpd; > > + } > > + > > + return of_genpd_add_provider_onecell(dev->of_node, > > +&blk_ctl->onecell_data); > > + > > +error: > > + for (; i >= 0; i--) { > > + genpd = blk_ctl->onecell_data.domains[i]; > > + if (!genpd) > > + continue; > > + domain = to_imx_blk_ctl_pd(genpd); > > + if (domain->dev) > > + platform_device_put(to_platform_device(domain->dev)); > > + } > > + return ret; > > +} > > +EXPORT_SYMBOL_GPL(imx_blk_ctl_register); > > + > > +const struct dev_pm_ops imx_blk_ctl_pm_ops = { > > + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > > + pm_runtime_force_resume) > > +}; > > +EXPORT_SYMBOL_GPL(imx_blk_ctl_pm_ops); > > diff --git a/drivers/soc/imx/blk-ctl.h b/drivers/soc/imx/blk-ctl.h new > > file mode 100644 index 000000000000..6780d00ec8c5 > > --- /dev/null > > +++ b/drivers/soc/imx/blk-ctl.h > > @@ -0,0 +1,85 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SOC_IMX_BLK_CTL_H > > +#define __SOC_IMX_BLK_CTL_H > > + > > +enum imx_blk_ctl_pd_type { > > + BLK_CTL_PD, > > +}; > > + > > +struct imx_blk_ctl_hw { > > + int type; > > + char *name; > > + char *active_pd_name; > > + u32 offset; > > + u32 mask; > > + u32 flags; > > + u32 id; > > + u32 rst_offset; > > + u32 rst_mask; > > + u32 errata; > > +}; > > + > > +struct imx_blk_ctl_domain { > > + struct generic_pm_domain genpd; > > + struct device *active_pd; > > + struct imx_blk_ctl *blk_ctl; > > + struct imx_blk_ctl_hw *hw; > > + struct device *dev; > > + bool hooked; > > + u32 id; > > +}; > > + > > +struct imx_blk_ctl_dev_data { > > + struct regmap_config config; > > + struct imx_blk_ctl_hw *pds; > > + struct imx_blk_ctl_hw *hw_hsk; > > + u32 pds_num; > > + u32 max_num; > > + char *name; > > +}; > > + > > +struct imx_blk_ctl { > > + struct device *dev; > > + struct regmap *regmap; > > + struct genpd_onecell_data onecell_data; > > + const struct imx_blk_ctl_dev_data *dev_data; > > + struct clk_bulk_data *clks; > > + u32 num_clks; > > + struct generic_pm_domain *bus_domain; > > + > > + struct mutex lock; > > +}; > > + > > +#define IMX_BLK_CTL(_type, _name, _active_pd, _id, _offset, _mask, > _rst_offset, _rst_mask, \ > > + _flags, _errata) \ > > + { \ > > + .type = _type, \ > > + .name = _name, \ > > + .active_pd_name = _active_pd, \ > > + .id = _id, \ > > + .offset = _offset, \ > > + .mask = _mask, \ > > + .flags = _flags, \ > > + .rst_offset = _rst_offset, \ > > + .rst_mask = _rst_mask, \ > > + .errata = _errata, \ > > + } > > + > > +#define IMX_BLK_CTL_PD(_name, _active_pd, _id, _offset, _mask, > _rst_offset, _rst_mask, _flags) \ > > + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, > _rst_offset, \ > > + _rst_mask, _flags, 0) > > + > > +#define IMX_BLK_CTL_PD_ERRATA(_name, _active_pd, _id, _offset, _mask, > _rst_offset, _rst_mask, \ > > + _flags, _errata) \ > > + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, > _rst_offset, \ > > + _rst_mask, _flags, _errata) > > + > > +int imx_blk_ctl_register(struct device *dev); > > + > > +#define IMX_BLK_CTL_PD_HANDSHAKE BIT(0) > > +#define IMX_BLK_CTL_PD_RESET BIT(1) > > +#define IMX_BLK_CTL_PD_BUS BIT(2) > > + > > +const extern struct dev_pm_ops imx_blk_ctl_pm_ops; > > + > > +#endif > > -- > > 2.30.0 > >
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile index 078dc918f4f3..d3d2b49a386c 100644 --- a/drivers/soc/imx/Makefile +++ b/drivers/soc/imx/Makefile @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o endif obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o diff --git a/drivers/soc/imx/blk-ctl.c b/drivers/soc/imx/blk-ctl.c new file mode 100644 index 000000000000..8e286b8ef1b3 --- /dev/null +++ b/drivers/soc/imx/blk-ctl.c @@ -0,0 +1,334 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2021 NXP. + */ + +#include <linux/clk.h> +#include <linux/completion.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/pm_domain.h> +#include <linux/reset-controller.h> + +#include "blk-ctl.h" + +static inline struct imx_blk_ctl_domain *to_imx_blk_ctl_pd(struct generic_pm_domain *genpd) +{ + return container_of(genpd, struct imx_blk_ctl_domain, genpd); +} + +static int imx_blk_ctl_enable_hsk(struct device *dev) +{ + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); + const struct imx_blk_ctl_hw *hw = blk_ctl->dev_data->hw_hsk; + struct regmap *regmap = blk_ctl->regmap; + int ret; + + if (hw->flags & IMX_BLK_CTL_PD_RESET) { + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask); + if (ret) + return ret; + } + + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); + + /* Wait for handshake */ + udelay(5); + + return ret; +} + +int imx_blk_ctl_power_on(struct generic_pm_domain *domain) +{ + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; + struct regmap *regmap = blk_ctl->regmap; + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; + int ret; + + mutex_lock(&blk_ctl->lock); + + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); + if (ret) { + mutex_unlock(&blk_ctl->lock); + return ret; + } + + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); + if (ret) + dev_err(blk_ctl->dev, "Hankshake failed when power on\n"); + + goto disable_clk; + } + + if (hw->flags & IMX_BLK_CTL_PD_RESET) { + ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask); + if (ret) + goto disable_clk; + } + + /* Wait for reset propagate */ + udelay(5); + + if (hw->flags & IMX_BLK_CTL_PD_RESET) { + ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask); + if (ret) + goto disable_clk; + } + + ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask); + if (ret) + goto disable_clk; + +disable_clk: + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); + + mutex_unlock(&blk_ctl->lock); + + return ret; +} + +int imx_blk_ctl_power_off(struct generic_pm_domain *domain) +{ + struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain); + struct imx_blk_ctl *blk_ctl = pd->blk_ctl; + struct regmap *regmap = blk_ctl->regmap; + const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id]; + int ret; + + mutex_lock(&blk_ctl->lock); + + ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks); + if (ret) { + mutex_unlock(&blk_ctl->lock); + return ret; + } + + if (!(hw->flags & IMX_BLK_CTL_PD_HANDSHAKE)) { + ret = regmap_clear_bits(regmap, hw->offset, hw->mask); + if (ret) + goto hsk_fail; + + if (hw->flags & IMX_BLK_CTL_PD_RESET) { + ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask); + if (ret) + goto hsk_fail; + } + } + + if (hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) { + ret = imx_blk_ctl_enable_hsk(blk_ctl->dev); + if (ret) + dev_err(blk_ctl->dev, "Hankshake failed when power off\n"); + } + +hsk_fail: + clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks); + + mutex_unlock(&blk_ctl->lock); + + return ret; +} + +static int imx_blk_ctl_probe(struct platform_device *pdev) +{ + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; + struct generic_pm_domain *parent_genpd; + struct device *dev = &pdev->dev; + struct device *active_pd; + int ret; + + pdev->dev.of_node = blk_ctl->dev->of_node; + if (domain->hw->active_pd_name) { + active_pd = dev_pm_domain_attach_by_name(dev, domain->hw->active_pd_name); + if (IS_ERR_OR_NULL(active_pd)) { + ret = PTR_ERR(active_pd) ? : -ENODATA; + pdev->dev.of_node = NULL; + return ret; + } + domain->active_pd = active_pd; + } else { + if (!blk_ctl->bus_domain) { + pdev->dev.of_node = NULL; + return -EPROBE_DEFER; + } + } + + if (domain->hw->active_pd_name) + parent_genpd = pd_to_genpd(active_pd->pm_domain); + else + parent_genpd = blk_ctl->bus_domain; + + if (pm_genpd_add_subdomain(parent_genpd, &domain->genpd)) { + pr_warn("failed to add subdomain: %s\n", domain->genpd.name); + } else { + mutex_lock(&blk_ctl->lock); + domain->hooked = true; + mutex_unlock(&blk_ctl->lock); + } + + return 0; +} + +static int imx_blk_ctl_remove(struct platform_device *pdev) +{ + struct imx_blk_ctl_domain *domain = pdev->dev.platform_data; + struct imx_blk_ctl *blk_ctl = domain->blk_ctl; + struct generic_pm_domain *parent_genpd; + struct device *active_pd; + + pdev->dev.of_node = blk_ctl->dev->of_node; + if (domain->hw->active_pd_name) + parent_genpd = pd_to_genpd(active_pd->pm_domain); + else + parent_genpd = blk_ctl->bus_domain; + + pm_genpd_remove_subdomain(parent_genpd, &domain->genpd); + + mutex_lock(&blk_ctl->lock); + domain->hooked = false; + mutex_unlock(&blk_ctl->lock); + + if (domain->hw->active_pd_name) + dev_pm_domain_detach(domain->active_pd, false); + + return 0; +} + +static const struct platform_device_id imx_blk_ctl_id[] = { + { "imx-vpumix-blk-ctl", }, + { "imx-dispmix-blk-ctl", }, + { }, +}; + +static struct platform_driver imx_blk_ctl_driver = { + .driver = { + .name = "imx-blk-ctl", + }, + .probe = imx_blk_ctl_probe, + .remove = imx_blk_ctl_remove, + .id_table = imx_blk_ctl_id, +}; +builtin_platform_driver(imx_blk_ctl_driver) + +static struct generic_pm_domain *imx_blk_ctl_genpd_xlate(struct of_phandle_args *genpdspec, + void *data) +{ + struct genpd_onecell_data *genpd_data = data; + unsigned int idx = genpdspec->args[0]; + struct imx_blk_ctl_domain *domain; + struct generic_pm_domain *genpd = ERR_PTR(-EPROBE_DEFER); + + if (genpdspec->args_count != 1) + return ERR_PTR(-EINVAL); + + if (idx >= genpd_data->num_domains) { + pr_err("%s: invalid domain index %u\n", __func__, idx); + return ERR_PTR(-EINVAL); + } + + if (!genpd_data->domains[idx]) + return ERR_PTR(-ENOENT); + + domain = to_imx_blk_ctl_pd(genpd_data->domains[idx]); + mutex_lock(&domain->blk_ctl->lock); + if (domain->hooked) + genpd = genpd_data->domains[idx]; + mutex_unlock(&domain->blk_ctl->lock); + + return genpd; +} + +int imx_blk_ctl_register(struct device *dev) +{ + struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev); + const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data; + int num = dev_data->pds_num; + struct imx_blk_ctl_domain *domain; + struct generic_pm_domain *genpd; + struct platform_device *pd_pdev; + int domain_index; + int i, ret; + + blk_ctl->onecell_data.num_domains = num; + blk_ctl->onecell_data.xlate = imx_blk_ctl_genpd_xlate; + blk_ctl->onecell_data.domains = devm_kcalloc(dev, num, sizeof(struct generic_pm_domain *), + GFP_KERNEL); + if (!blk_ctl->onecell_data.domains) + return -ENOMEM; + + for (i = 0; i < num; i++) { + domain_index = dev_data->pds[i].id; + if (domain_index >= num) { + dev_warn(dev, "Domain index %d is out of bounds\n", domain_index); + continue; + } + + domain = devm_kzalloc(dev, sizeof(struct imx_blk_ctl_domain), GFP_KERNEL); + if (!domain) + goto error; + + pd_pdev = platform_device_alloc(dev_data->name, domain_index); + if (!pd_pdev) { + dev_err(dev, "Failed to allocate platform device\n"); + goto error; + } + + pd_pdev->dev.platform_data = domain; + + domain->blk_ctl = blk_ctl; + domain->hw = &dev_data->pds[i]; + domain->id = domain_index; + domain->genpd.name = dev_data->pds[i].name; + domain->genpd.power_off = imx_blk_ctl_power_off; + domain->genpd.power_on = imx_blk_ctl_power_on; + domain->dev = &pd_pdev->dev; + domain->hooked = false; + + ret = pm_genpd_init(&domain->genpd, NULL, true); + pd_pdev->dev.parent = dev; + + if (domain->hw->flags & IMX_BLK_CTL_PD_HANDSHAKE) + blk_ctl->bus_domain = &domain->genpd; + + ret = platform_device_add(pd_pdev); + if (ret) { + platform_device_put(pd_pdev); + goto error; + } + blk_ctl->onecell_data.domains[i] = &domain->genpd; + } + + return of_genpd_add_provider_onecell(dev->of_node, &blk_ctl->onecell_data); + +error: + for (; i >= 0; i--) { + genpd = blk_ctl->onecell_data.domains[i]; + if (!genpd) + continue; + domain = to_imx_blk_ctl_pd(genpd); + if (domain->dev) + platform_device_put(to_platform_device(domain->dev)); + } + return ret; +} +EXPORT_SYMBOL_GPL(imx_blk_ctl_register); + +const struct dev_pm_ops imx_blk_ctl_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; +EXPORT_SYMBOL_GPL(imx_blk_ctl_pm_ops); diff --git a/drivers/soc/imx/blk-ctl.h b/drivers/soc/imx/blk-ctl.h new file mode 100644 index 000000000000..6780d00ec8c5 --- /dev/null +++ b/drivers/soc/imx/blk-ctl.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __SOC_IMX_BLK_CTL_H +#define __SOC_IMX_BLK_CTL_H + +enum imx_blk_ctl_pd_type { + BLK_CTL_PD, +}; + +struct imx_blk_ctl_hw { + int type; + char *name; + char *active_pd_name; + u32 offset; + u32 mask; + u32 flags; + u32 id; + u32 rst_offset; + u32 rst_mask; + u32 errata; +}; + +struct imx_blk_ctl_domain { + struct generic_pm_domain genpd; + struct device *active_pd; + struct imx_blk_ctl *blk_ctl; + struct imx_blk_ctl_hw *hw; + struct device *dev; + bool hooked; + u32 id; +}; + +struct imx_blk_ctl_dev_data { + struct regmap_config config; + struct imx_blk_ctl_hw *pds; + struct imx_blk_ctl_hw *hw_hsk; + u32 pds_num; + u32 max_num; + char *name; +}; + +struct imx_blk_ctl { + struct device *dev; + struct regmap *regmap; + struct genpd_onecell_data onecell_data; + const struct imx_blk_ctl_dev_data *dev_data; + struct clk_bulk_data *clks; + u32 num_clks; + struct generic_pm_domain *bus_domain; + + struct mutex lock; +}; + +#define IMX_BLK_CTL(_type, _name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, \ + _flags, _errata) \ + { \ + .type = _type, \ + .name = _name, \ + .active_pd_name = _active_pd, \ + .id = _id, \ + .offset = _offset, \ + .mask = _mask, \ + .flags = _flags, \ + .rst_offset = _rst_offset, \ + .rst_mask = _rst_mask, \ + .errata = _errata, \ + } + +#define IMX_BLK_CTL_PD(_name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, _flags) \ + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, _rst_offset, \ + _rst_mask, _flags, 0) + +#define IMX_BLK_CTL_PD_ERRATA(_name, _active_pd, _id, _offset, _mask, _rst_offset, _rst_mask, \ + _flags, _errata) \ + IMX_BLK_CTL(BLK_CTL_PD, _name, _active_pd, _id, _offset, _mask, _rst_offset, \ + _rst_mask, _flags, _errata) + +int imx_blk_ctl_register(struct device *dev); + +#define IMX_BLK_CTL_PD_HANDSHAKE BIT(0) +#define IMX_BLK_CTL_PD_RESET BIT(1) +#define IMX_BLK_CTL_PD_BUS BIT(2) + +const extern struct dev_pm_ops imx_blk_ctl_pm_ops; + +#endif