diff options
Diffstat (limited to 'drivers/pmdomain/sunxi')
| -rw-r--r-- | drivers/pmdomain/sunxi/Kconfig | 29 | ||||
| -rw-r--r-- | drivers/pmdomain/sunxi/Makefile | 2 | ||||
| -rw-r--r-- | drivers/pmdomain/sunxi/sun20i-ppu.c | 17 | ||||
| -rw-r--r-- | drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c | 208 | ||||
| -rw-r--r-- | drivers/pmdomain/sunxi/sun55i-pck600.c | 234 |
5 files changed, 487 insertions, 3 deletions
diff --git a/drivers/pmdomain/sunxi/Kconfig b/drivers/pmdomain/sunxi/Kconfig index 17781bf8d86d..858446594c88 100644 --- a/drivers/pmdomain/sunxi/Kconfig +++ b/drivers/pmdomain/sunxi/Kconfig @@ -1,10 +1,33 @@ # SPDX-License-Identifier: GPL-2.0-only config SUN20I_PPU - bool "Allwinner D1 PPU power domain driver" + tristate "Allwinner D1 PPU power domain driver" depends on ARCH_SUNXI || COMPILE_TEST depends on PM + default ARCH_SUNXI select PM_GENERIC_DOMAINS help - Say y to enable the PPU power domain driver. This saves power - when certain peripherals, such as the video engine, are idle. + Say y to enable the PPU power domain driver. This is required + to enable power to certain peripherals, such as the display + engine. + +config SUN50I_H6_PRCM_PPU + tristate "Allwinner H6 PRCM power domain driver" + depends on ARCH_SUNXI || COMPILE_TEST + depends on PM + select PM_GENERIC_DOMAINS + help + Say y to enable the Allwinner H6/H616 PRCM power domain driver. + This is required to enable the Mali GPU in the H616 SoC, it is + optional for the H6. + +config SUN55I_PCK600 + tristate "Allwinner A523 PCK-600 power domain driver" + depends on ARCH_SUNXI || COMPILE_TEST + depends on PM + default ARCH_SUNXI + select PM_GENERIC_DOMAINS + help + Say y to enable the PCK-600 power domain driver. This is required + to enable power to certain peripherals, such as the display and + video engines. diff --git a/drivers/pmdomain/sunxi/Makefile b/drivers/pmdomain/sunxi/Makefile index ec1d7a2fb21d..e344b232fc9f 100644 --- a/drivers/pmdomain/sunxi/Makefile +++ b/drivers/pmdomain/sunxi/Makefile @@ -1,2 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_SUN20I_PPU) += sun20i-ppu.o +obj-$(CONFIG_SUN50I_H6_PRCM_PPU) += sun50i-h6-prcm-ppu.o +obj-$(CONFIG_SUN55I_PCK600) += sun55i-pck600.o diff --git a/drivers/pmdomain/sunxi/sun20i-ppu.c b/drivers/pmdomain/sunxi/sun20i-ppu.c index 9f002748d224..b65876a68cc1 100644 --- a/drivers/pmdomain/sunxi/sun20i-ppu.c +++ b/drivers/pmdomain/sunxi/sun20i-ppu.c @@ -193,6 +193,19 @@ static const struct sun20i_ppu_desc sun8i_v853_ppu_desc = { .num_domains = ARRAY_SIZE(sun8i_v853_ppu_pd_names), }; +static const char *const sun55i_a523_ppu_pd_names[] = { + "DSP", + "NPU", + "AUDIO", + "SRAM", + "RISCV", +}; + +static const struct sun20i_ppu_desc sun55i_a523_ppu_desc = { + .names = sun55i_a523_ppu_pd_names, + .num_domains = ARRAY_SIZE(sun55i_a523_ppu_pd_names), +}; + static const struct of_device_id sun20i_ppu_of_match[] = { { .compatible = "allwinner,sun20i-d1-ppu", @@ -202,6 +215,10 @@ static const struct of_device_id sun20i_ppu_of_match[] = { .compatible = "allwinner,sun8i-v853-ppu", .data = &sun8i_v853_ppu_desc, }, + { + .compatible = "allwinner,sun55i-a523-ppu", + .data = &sun55i_a523_ppu_desc, + }, { } }; MODULE_DEVICE_TABLE(of, sun20i_ppu_of_match); diff --git a/drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c b/drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c new file mode 100644 index 000000000000..d59644499dfe --- /dev/null +++ b/drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) Arm Ltd. 2024 + * + * Allwinner H6/H616 PRCM power domain driver. + * This covers a few registers inside the PRCM (Power Reset Clock Management) + * block that control some power rails, most prominently for the Mali GPU. + */ + +#include <linux/bitfield.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/reset.h> + +/* + * The PRCM block covers multiple devices, starting with some clocks, + * then followed by the power rails. + * The clocks are covered by a different driver, so this driver's MMIO range + * starts later in the PRCM MMIO frame, not at the beginning of it. + * To keep the register offsets consistent with other PRCM documentation, + * express the registers relative to the beginning of the whole PRCM, and + * subtract the PPU offset this driver is bound to. + */ +#define PD_H6_PPU_OFFSET 0x250 +#define PD_H6_VDD_SYS_REG 0x250 +#define PD_H616_ANA_VDD_GATE BIT(4) +#define PD_H6_CPUS_VDD_GATE BIT(3) +#define PD_H6_AVCC_VDD_GATE BIT(2) +#define PD_H6_GPU_REG 0x254 +#define PD_H6_GPU_GATE BIT(0) + +struct sun50i_h6_ppu_pd { + struct generic_pm_domain genpd; + void __iomem *reg; + u32 gate_mask; + bool negated; +}; + +#define FLAG_PPU_ALWAYS_ON BIT(0) +#define FLAG_PPU_NEGATED BIT(1) + +struct sun50i_h6_ppu_desc { + const char *name; + u32 offset; + u32 mask; + unsigned int flags; +}; + +static const struct sun50i_h6_ppu_desc sun50i_h6_ppus[] = { + { "AVCC", PD_H6_VDD_SYS_REG, PD_H6_AVCC_VDD_GATE }, + { "CPUS", PD_H6_VDD_SYS_REG, PD_H6_CPUS_VDD_GATE }, + { "GPU", PD_H6_GPU_REG, PD_H6_GPU_GATE }, +}; +static const struct sun50i_h6_ppu_desc sun50i_h616_ppus[] = { + { "PLL", PD_H6_VDD_SYS_REG, PD_H6_AVCC_VDD_GATE, + FLAG_PPU_ALWAYS_ON | FLAG_PPU_NEGATED }, + { "ANA", PD_H6_VDD_SYS_REG, PD_H616_ANA_VDD_GATE, FLAG_PPU_ALWAYS_ON }, + { "GPU", PD_H6_GPU_REG, PD_H6_GPU_GATE, FLAG_PPU_NEGATED }, +}; + +struct sun50i_h6_ppu_data { + const struct sun50i_h6_ppu_desc *descs; + int nr_domains; +}; + +static const struct sun50i_h6_ppu_data sun50i_h6_ppu_data = { + .descs = sun50i_h6_ppus, + .nr_domains = ARRAY_SIZE(sun50i_h6_ppus), +}; + +static const struct sun50i_h6_ppu_data sun50i_h616_ppu_data = { + .descs = sun50i_h616_ppus, + .nr_domains = ARRAY_SIZE(sun50i_h616_ppus), +}; + +#define to_sun50i_h6_ppu_pd(_genpd) \ + container_of(_genpd, struct sun50i_h6_ppu_pd, genpd) + +static bool sun50i_h6_ppu_power_status(const struct sun50i_h6_ppu_pd *pd) +{ + bool bit = readl(pd->reg) & pd->gate_mask; + + return bit ^ pd->negated; +} + +static int sun50i_h6_ppu_pd_set_power(const struct sun50i_h6_ppu_pd *pd, + bool set_bit) +{ + u32 reg = readl(pd->reg); + + if (set_bit) + writel(reg | pd->gate_mask, pd->reg); + else + writel(reg & ~pd->gate_mask, pd->reg); + + return 0; +} + +static int sun50i_h6_ppu_pd_power_on(struct generic_pm_domain *genpd) +{ + const struct sun50i_h6_ppu_pd *pd = to_sun50i_h6_ppu_pd(genpd); + + return sun50i_h6_ppu_pd_set_power(pd, !pd->negated); +} + +static int sun50i_h6_ppu_pd_power_off(struct generic_pm_domain *genpd) +{ + const struct sun50i_h6_ppu_pd *pd = to_sun50i_h6_ppu_pd(genpd); + + return sun50i_h6_ppu_pd_set_power(pd, pd->negated); +} + +static int sun50i_h6_ppu_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct genpd_onecell_data *ppu; + struct sun50i_h6_ppu_pd *pds; + const struct sun50i_h6_ppu_data *data; + void __iomem *base; + int ret, i; + + data = of_device_get_match_data(dev); + if (!data) + return -EINVAL; + + pds = devm_kcalloc(dev, data->nr_domains, sizeof(*pds), GFP_KERNEL); + if (!pds) + return -ENOMEM; + + ppu = devm_kzalloc(dev, sizeof(*ppu), GFP_KERNEL); + if (!ppu) + return -ENOMEM; + + ppu->num_domains = data->nr_domains; + ppu->domains = devm_kcalloc(dev, data->nr_domains, + sizeof(*ppu->domains), GFP_KERNEL); + if (!ppu->domains) + return -ENOMEM; + + platform_set_drvdata(pdev, ppu); + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + for (i = 0; i < data->nr_domains; i++) { + struct sun50i_h6_ppu_pd *pd = &pds[i]; + const struct sun50i_h6_ppu_desc *desc = &data->descs[i]; + + pd->genpd.name = desc->name; + pd->genpd.power_off = sun50i_h6_ppu_pd_power_off; + pd->genpd.power_on = sun50i_h6_ppu_pd_power_on; + if (desc->flags & FLAG_PPU_ALWAYS_ON) + pd->genpd.flags = GENPD_FLAG_ALWAYS_ON; + pd->negated = !!(desc->flags & FLAG_PPU_NEGATED); + pd->reg = base + desc->offset - PD_H6_PPU_OFFSET; + pd->gate_mask = desc->mask; + + ret = pm_genpd_init(&pd->genpd, NULL, + !sun50i_h6_ppu_power_status(pd)); + if (ret) { + dev_warn(dev, "Failed to add %s power domain: %d\n", + desc->name, ret); + goto out_remove_pds; + } + ppu->domains[i] = &pd->genpd; + } + + ret = of_genpd_add_provider_onecell(dev->of_node, ppu); + if (!ret) + return 0; + + dev_warn(dev, "Failed to add provider: %d\n", ret); +out_remove_pds: + for (i--; i >= 0; i--) + pm_genpd_remove(&pds[i].genpd); + + return ret; +} + +static const struct of_device_id sun50i_h6_ppu_of_match[] = { + { .compatible = "allwinner,sun50i-h6-prcm-ppu", + .data = &sun50i_h6_ppu_data }, + { .compatible = "allwinner,sun50i-h616-prcm-ppu", + .data = &sun50i_h616_ppu_data }, + { } +}; +MODULE_DEVICE_TABLE(of, sun50i_h6_ppu_of_match); + +static struct platform_driver sun50i_h6_ppu_driver = { + .probe = sun50i_h6_ppu_probe, + .driver = { + .name = "sun50i-h6-prcm-ppu", + .of_match_table = sun50i_h6_ppu_of_match, + /* Power domains cannot be removed while they are in use. */ + .suppress_bind_attrs = true, + }, +}; +module_platform_driver(sun50i_h6_ppu_driver); + +MODULE_AUTHOR("Andre Przywara <andre.przywara@arm.com>"); +MODULE_DESCRIPTION("Allwinner H6 PRCM power domain driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/pmdomain/sunxi/sun55i-pck600.c b/drivers/pmdomain/sunxi/sun55i-pck600.c new file mode 100644 index 000000000000..c7ab51514531 --- /dev/null +++ b/drivers/pmdomain/sunxi/sun55i-pck600.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Allwinner PCK-600 power domain support + * + * Copyright (c) 2025 Chen-Yu Tsai <wens@csie.org> + * + * The hardware is likely based on the Arm PCK-600 IP, since some of + * the registers match Arm's documents, with additional delay controls + * that are in registers listed as reserved. + * + * Documents include: + * - "Arm CoreLink PCK-600 Power Control Kit" TRM + * - "Arm Power Policy Unit" architecture specification (DEN0051E) + */ + +#include <linux/bitfield.h> +#include <linux/clk.h> +#include <linux/container_of.h> +#include <linux/device.h> +#include <linux/dev_printk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/reset.h> +#include <linux/slab.h> +#include <linux/string_choices.h> + +#define PPU_PWPR 0x0 +#define PPU_PWSR 0x8 +#define PPU_DCDR0 0x170 +#define PPU_DCDR1 0x174 + +/* shared definition for PPU_PWPR and PPU_PWSR */ +#define PPU_PWR_STATUS GENMASK(3, 0) +#define PPU_POWER_MODE_ON 0x8 +#define PPU_POWER_MODE_OFF 0x0 + +#define PPU_REG_SIZE 0x1000 + +struct sunxi_pck600_desc { + const char * const *pd_names; + unsigned int num_domains; + u32 logic_power_switch0_delay_offset; + u32 logic_power_switch1_delay_offset; + u32 off2on_delay_offset; + u32 device_ctrl0_delay; + u32 device_ctrl1_delay; + u32 logic_power_switch0_delay; + u32 logic_power_switch1_delay; + u32 off2on_delay; +}; + +struct sunxi_pck600_pd { + struct generic_pm_domain genpd; + struct sunxi_pck600 *pck; + void __iomem *base; +}; + +struct sunxi_pck600 { + struct device *dev; + struct genpd_onecell_data genpd_data; + struct sunxi_pck600_pd pds[]; +}; + +#define to_sunxi_pd(gpd) container_of(gpd, struct sunxi_pck600_pd, genpd) + +static int sunxi_pck600_pd_set_power(struct sunxi_pck600_pd *pd, bool on) +{ + struct sunxi_pck600 *pck = pd->pck; + struct generic_pm_domain *genpd = &pd->genpd; + int ret; + u32 val, reg; + + val = on ? PPU_POWER_MODE_ON : PPU_POWER_MODE_OFF; + + reg = readl(pd->base + PPU_PWPR); + FIELD_MODIFY(PPU_PWR_STATUS, ®, val); + writel(reg, pd->base + PPU_PWPR); + + /* push write out to hardware */ + reg = readl(pd->base + PPU_PWPR); + + ret = readl_poll_timeout_atomic(pd->base + PPU_PWSR, reg, + FIELD_GET(PPU_PWR_STATUS, reg) == val, + 0, 10000); + if (ret) + dev_err(pck->dev, "failed to turn domain \"%s\" %s: %d\n", + genpd->name, str_on_off(on), ret); + + return ret; +} + +static int sunxi_pck600_power_on(struct generic_pm_domain *domain) +{ + struct sunxi_pck600_pd *pd = to_sunxi_pd(domain); + + return sunxi_pck600_pd_set_power(pd, true); +} + +static int sunxi_pck600_power_off(struct generic_pm_domain *domain) +{ + struct sunxi_pck600_pd *pd = to_sunxi_pd(domain); + + return sunxi_pck600_pd_set_power(pd, false); +} + +static void sunxi_pck600_pd_setup(struct sunxi_pck600_pd *pd, + const struct sunxi_pck600_desc *desc) +{ + writel(desc->device_ctrl0_delay, pd->base + PPU_DCDR0); + writel(desc->device_ctrl1_delay, pd->base + PPU_DCDR1); + writel(desc->logic_power_switch0_delay, + pd->base + desc->logic_power_switch0_delay_offset); + writel(desc->logic_power_switch1_delay, + pd->base + desc->logic_power_switch1_delay_offset); + writel(desc->off2on_delay, pd->base + desc->off2on_delay_offset); +} + +static int sunxi_pck600_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct sunxi_pck600_desc *desc; + struct genpd_onecell_data *genpds; + struct sunxi_pck600 *pck; + struct reset_control *rst; + struct clk *clk; + void __iomem *base; + int i, ret; + + desc = of_device_get_match_data(dev); + + pck = devm_kzalloc(dev, struct_size(pck, pds, desc->num_domains), GFP_KERNEL); + if (!pck) + return -ENOMEM; + + pck->dev = &pdev->dev; + platform_set_drvdata(pdev, pck); + + genpds = &pck->genpd_data; + genpds->num_domains = desc->num_domains; + genpds->domains = devm_kcalloc(dev, desc->num_domains, + sizeof(*genpds->domains), GFP_KERNEL); + if (!genpds->domains) + return -ENOMEM; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + rst = devm_reset_control_get_exclusive_released(dev, NULL); + if (IS_ERR(rst)) + return dev_err_probe(dev, PTR_ERR(rst), "failed to get reset control\n"); + + clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "failed to get clock\n"); + + for (i = 0; i < desc->num_domains; i++) { + struct sunxi_pck600_pd *pd = &pck->pds[i]; + + pd->genpd.name = desc->pd_names[i]; + pd->genpd.power_off = sunxi_pck600_power_off; + pd->genpd.power_on = sunxi_pck600_power_on; + pd->base = base + PPU_REG_SIZE * i; + + sunxi_pck600_pd_setup(pd, desc); + ret = pm_genpd_init(&pd->genpd, NULL, false); + if (ret) { + dev_err_probe(dev, ret, "failed to initialize power domain\n"); + goto err_remove_pds; + } + + genpds->domains[i] = &pd->genpd; + } + + ret = of_genpd_add_provider_onecell(dev_of_node(dev), genpds); + if (ret) { + dev_err_probe(dev, ret, "failed to add PD provider\n"); + goto err_remove_pds; + } + + return 0; + +err_remove_pds: + for (i--; i >= 0; i--) + pm_genpd_remove(genpds->domains[i]); + + return ret; +} + +static const char * const sun55i_a523_pck600_pd_names[] = { + "VE", "GPU", "VI", "VO0", "VO1", "DE", "NAND", "PCIE" +}; + +static const struct sunxi_pck600_desc sun55i_a523_pck600_desc = { + .pd_names = sun55i_a523_pck600_pd_names, + .num_domains = ARRAY_SIZE(sun55i_a523_pck600_pd_names), + .logic_power_switch0_delay_offset = 0xc00, + .logic_power_switch1_delay_offset = 0xc04, + .off2on_delay_offset = 0xc10, + .device_ctrl0_delay = 0xffffff, + .device_ctrl1_delay = 0xffff, + .logic_power_switch0_delay = 0x8080808, + .logic_power_switch1_delay = 0x808, + .off2on_delay = 0x8 +}; + +static const struct of_device_id sunxi_pck600_of_match[] = { + { + .compatible = "allwinner,sun55i-a523-pck-600", + .data = &sun55i_a523_pck600_desc, + }, + {} +}; +MODULE_DEVICE_TABLE(of, sunxi_pck600_of_match); + +static struct platform_driver sunxi_pck600_driver = { + .probe = sunxi_pck600_probe, + .driver = { + .name = "sunxi-pck-600", + .of_match_table = sunxi_pck600_of_match, + /* Power domains cannot be removed if in use. */ + .suppress_bind_attrs = true, + }, +}; +module_platform_driver(sunxi_pck600_driver); + +MODULE_DESCRIPTION("Allwinner PCK-600 power domain driver"); +MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); +MODULE_LICENSE("GPL"); |