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 <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: <linux-sunxi@lists.linux.dev>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 0 insertions, 208 deletions

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 <linux/bitfield.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <linux/reset.h>
-
-#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 <samuel@sholland.org>");
-MODULE_DESCRIPTION("Allwinner D1 PPU power domain driver");
-MODULE_LICENSE("GPL");