From fd697e2160401530dfe43074bbdcbb7d63b87b60 Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Wed, 5 Jul 2023 18:26:45 +0200 Subject: soc: sunxi: Move power-domain driver to the genpd dir To simplify with maintenance let's move the sunxi power-domain driver to the new genpd directory. Going forward, patches are intended to be managed through a separate git tree, according to MAINTAINERS. Cc: Chen-Yu Tsai Cc: Jernej Skrabec Cc: Samuel Holland Cc: Acked-by: Jernej Skrabec Signed-off-by: Ulf Hansson --- drivers/soc/sunxi/Makefile | 1 - drivers/soc/sunxi/sun20i-ppu.c | 207 ----------------------------------------- 2 files changed, 208 deletions(-) delete mode 100644 drivers/soc/sunxi/sun20i-ppu.c (limited to 'drivers/soc/sunxi') diff --git a/drivers/soc/sunxi/Makefile b/drivers/soc/sunxi/Makefile index 90ff2ebe7655..549159571d4f 100644 --- a/drivers/soc/sunxi/Makefile +++ b/drivers/soc/sunxi/Makefile @@ -1,4 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_SUNXI_MBUS) += sunxi_mbus.o obj-$(CONFIG_SUNXI_SRAM) += sunxi_sram.o -obj-$(CONFIG_SUN20I_PPU) += sun20i-ppu.o diff --git a/drivers/soc/sunxi/sun20i-ppu.c b/drivers/soc/sunxi/sun20i-ppu.c deleted file mode 100644 index 98cb41d36560..000000000000 --- a/drivers/soc/sunxi/sun20i-ppu.c +++ /dev/null @@ -1,207 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define PD_STATE_ON 1 -#define PD_STATE_OFF 2 - -#define PD_RSTN_REG 0x00 -#define PD_CLK_GATE_REG 0x04 -#define PD_PWROFF_GATE_REG 0x08 -#define PD_PSW_ON_REG 0x0c -#define PD_PSW_OFF_REG 0x10 -#define PD_PSW_DELAY_REG 0x14 -#define PD_OFF_DELAY_REG 0x18 -#define PD_ON_DELAY_REG 0x1c -#define PD_COMMAND_REG 0x20 -#define PD_STATUS_REG 0x24 -#define PD_STATUS_COMPLETE BIT(1) -#define PD_STATUS_BUSY BIT(3) -#define PD_STATUS_STATE GENMASK(17, 16) -#define PD_ACTIVE_CTRL_REG 0x2c -#define PD_GATE_STATUS_REG 0x30 -#define PD_RSTN_STATUS BIT(0) -#define PD_CLK_GATE_STATUS BIT(1) -#define PD_PWROFF_GATE_STATUS BIT(2) -#define PD_PSW_STATUS_REG 0x34 - -#define PD_REGS_SIZE 0x80 - -struct sun20i_ppu_desc { - const char *const *names; - unsigned int num_domains; -}; - -struct sun20i_ppu_pd { - struct generic_pm_domain genpd; - void __iomem *base; -}; - -#define to_sun20i_ppu_pd(_genpd) \ - container_of(_genpd, struct sun20i_ppu_pd, genpd) - -static bool sun20i_ppu_pd_is_on(const struct sun20i_ppu_pd *pd) -{ - u32 status = readl(pd->base + PD_STATUS_REG); - - return FIELD_GET(PD_STATUS_STATE, status) == PD_STATE_ON; -} - -static int sun20i_ppu_pd_set_power(const struct sun20i_ppu_pd *pd, bool power_on) -{ - u32 state, status; - int ret; - - if (sun20i_ppu_pd_is_on(pd) == power_on) - return 0; - - /* Wait for the power controller to be idle. */ - ret = readl_poll_timeout(pd->base + PD_STATUS_REG, status, - !(status & PD_STATUS_BUSY), 100, 1000); - if (ret) - return ret; - - state = power_on ? PD_STATE_ON : PD_STATE_OFF; - writel(state, pd->base + PD_COMMAND_REG); - - /* Wait for the state transition to complete. */ - ret = readl_poll_timeout(pd->base + PD_STATUS_REG, status, - FIELD_GET(PD_STATUS_STATE, status) == state && - (status & PD_STATUS_COMPLETE), 100, 1000); - if (ret) - return ret; - - /* Clear the completion flag. */ - writel(status, pd->base + PD_STATUS_REG); - - return 0; -} - -static int sun20i_ppu_pd_power_on(struct generic_pm_domain *genpd) -{ - const struct sun20i_ppu_pd *pd = to_sun20i_ppu_pd(genpd); - - return sun20i_ppu_pd_set_power(pd, true); -} - -static int sun20i_ppu_pd_power_off(struct generic_pm_domain *genpd) -{ - const struct sun20i_ppu_pd *pd = to_sun20i_ppu_pd(genpd); - - return sun20i_ppu_pd_set_power(pd, false); -} - -static int sun20i_ppu_probe(struct platform_device *pdev) -{ - const struct sun20i_ppu_desc *desc; - struct device *dev = &pdev->dev; - struct genpd_onecell_data *ppu; - struct sun20i_ppu_pd *pds; - struct reset_control *rst; - void __iomem *base; - struct clk *clk; - int ret; - - desc = of_device_get_match_data(dev); - if (!desc) - return -EINVAL; - - pds = devm_kcalloc(dev, desc->num_domains, sizeof(*pds), GFP_KERNEL); - if (!pds) - return -ENOMEM; - - ppu = devm_kzalloc(dev, sizeof(*ppu), GFP_KERNEL); - if (!ppu) - return -ENOMEM; - - ppu->domains = devm_kcalloc(dev, desc->num_domains, - sizeof(*ppu->domains), GFP_KERNEL); - if (!ppu->domains) - return -ENOMEM; - - ppu->num_domains = desc->num_domains; - platform_set_drvdata(pdev, ppu); - - base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(base)) - return PTR_ERR(base); - - clk = devm_clk_get_enabled(dev, NULL); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - rst = devm_reset_control_get_exclusive(dev, NULL); - if (IS_ERR(rst)) - return PTR_ERR(rst); - - ret = reset_control_deassert(rst); - if (ret) - return ret; - - for (unsigned int i = 0; i < ppu->num_domains; ++i) { - struct sun20i_ppu_pd *pd = &pds[i]; - - pd->genpd.name = desc->names[i]; - pd->genpd.power_off = sun20i_ppu_pd_power_off; - pd->genpd.power_on = sun20i_ppu_pd_power_on; - pd->base = base + PD_REGS_SIZE * i; - - ret = pm_genpd_init(&pd->genpd, NULL, sun20i_ppu_pd_is_on(pd)); - if (ret) { - dev_warn(dev, "Failed to add '%s' domain: %d\n", - pd->genpd.name, ret); - continue; - } - - ppu->domains[i] = &pd->genpd; - } - - ret = of_genpd_add_provider_onecell(dev->of_node, ppu); - if (ret) - dev_warn(dev, "Failed to add provider: %d\n", ret); - - return 0; -} - -static const char *const sun20i_d1_ppu_pd_names[] = { - "CPU", - "VE", - "DSP", -}; - -static const struct sun20i_ppu_desc sun20i_d1_ppu_desc = { - .names = sun20i_d1_ppu_pd_names, - .num_domains = ARRAY_SIZE(sun20i_d1_ppu_pd_names), -}; - -static const struct of_device_id sun20i_ppu_of_match[] = { - { - .compatible = "allwinner,sun20i-d1-ppu", - .data = &sun20i_d1_ppu_desc, - }, - { } -}; -MODULE_DEVICE_TABLE(of, sun20i_ppu_of_match); - -static struct platform_driver sun20i_ppu_driver = { - .probe = sun20i_ppu_probe, - .driver = { - .name = "sun20i-ppu", - .of_match_table = sun20i_ppu_of_match, - /* Power domains cannot be removed while they are in use. */ - .suppress_bind_attrs = true, - }, -}; -module_platform_driver(sun20i_ppu_driver); - -MODULE_AUTHOR("Samuel Holland "); -MODULE_DESCRIPTION("Allwinner D1 PPU power domain driver"); -MODULE_LICENSE("GPL"); -- cgit v1.2.3