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linux-stable/drivers/soc/imx/imx8m-blk-ctrl.c

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// 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>
#include <dt-bindings/power/imx8mp-power.h>
#include <dt-bindings/power/imx8mq-power.h>
#define BLK_SFT_RSTN 0x0
#define BLK_CLK_EN 0x4
#define BLK_MIPI_RESET_DIV 0x8 /* Mini/Nano/Plus 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, Nano and Plus 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 4
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, &regmap_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;
}
dev_set_name(domain->power_dev, "%s", data->name);
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 int imx8mp_media_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;
}
/*
* From i.MX 8M Plus Applications Processor Reference Manual, Rev. 1,
* section 13.2.2, 13.2.3
* isp-ahb and dwe are not in Figure 13-5. Media BLK_CTRL Clocks
*/
static const struct imx8m_blk_ctrl_domain_data imx8mp_media_blk_ctl_domain_data[] = {
[IMX8MP_MEDIABLK_PD_MIPI_DSI_1] = {
.name = "mediablk-mipi-dsi-1",
.clk_names = (const char *[]){ "apb", "phy", },
.num_clks = 2,
.gpc_name = "mipi-dsi1",
.rst_mask = BIT(0) | BIT(1),
.clk_mask = BIT(0) | BIT(1),
.mipi_phy_rst_mask = BIT(17),
},
[IMX8MP_MEDIABLK_PD_MIPI_CSI2_1] = {
.name = "mediablk-mipi-csi2-1",
.clk_names = (const char *[]){ "apb", "cam1" },
.num_clks = 2,
.gpc_name = "mipi-csi1",
.rst_mask = BIT(2) | BIT(3),
.clk_mask = BIT(2) | BIT(3),
.mipi_phy_rst_mask = BIT(16),
},
[IMX8MP_MEDIABLK_PD_LCDIF_1] = {
.name = "mediablk-lcdif-1",
.clk_names = (const char *[]){ "disp1", "apb", "axi", },
.num_clks = 3,
.gpc_name = "lcdif1",
.rst_mask = BIT(4) | BIT(5) | BIT(23),
.clk_mask = BIT(4) | BIT(5) | BIT(23),
},
[IMX8MP_MEDIABLK_PD_ISI] = {
.name = "mediablk-isi",
.clk_names = (const char *[]){ "axi", "apb" },
.num_clks = 2,
.gpc_name = "isi",
.rst_mask = BIT(6) | BIT(7),
.clk_mask = BIT(6) | BIT(7),
},
[IMX8MP_MEDIABLK_PD_MIPI_CSI2_2] = {
.name = "mediablk-mipi-csi2-2",
.clk_names = (const char *[]){ "apb", "cam2" },
.num_clks = 2,
.gpc_name = "mipi-csi2",
.rst_mask = BIT(9) | BIT(10),
.clk_mask = BIT(9) | BIT(10),
.mipi_phy_rst_mask = BIT(30),
},
[IMX8MP_MEDIABLK_PD_LCDIF_2] = {
.name = "mediablk-lcdif-2",
.clk_names = (const char *[]){ "disp2", "apb", "axi", },
.num_clks = 3,
.gpc_name = "lcdif2",
.rst_mask = BIT(11) | BIT(12) | BIT(24),
.clk_mask = BIT(11) | BIT(12) | BIT(24),
},
[IMX8MP_MEDIABLK_PD_ISP] = {
.name = "mediablk-isp",
.clk_names = (const char *[]){ "isp", "axi", "apb" },
.num_clks = 3,
.gpc_name = "isp",
.rst_mask = BIT(16) | BIT(17) | BIT(18),
.clk_mask = BIT(16) | BIT(17) | BIT(18),
},
[IMX8MP_MEDIABLK_PD_DWE] = {
.name = "mediablk-dwe",
.clk_names = (const char *[]){ "axi", "apb" },
.num_clks = 2,
.gpc_name = "dwe",
.rst_mask = BIT(19) | BIT(20) | BIT(21),
.clk_mask = BIT(19) | BIT(20) | BIT(21),
},
[IMX8MP_MEDIABLK_PD_MIPI_DSI_2] = {
.name = "mediablk-mipi-dsi-2",
.clk_names = (const char *[]){ "phy", },
.num_clks = 1,
.gpc_name = "mipi-dsi2",
.rst_mask = BIT(22),
.clk_mask = BIT(22),
.mipi_phy_rst_mask = BIT(29),
},
};
static const struct imx8m_blk_ctrl_data imx8mp_media_blk_ctl_dev_data = {
.max_reg = 0x138,
.power_notifier_fn = imx8mp_media_power_notifier,
.domains = imx8mp_media_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mp_media_blk_ctl_domain_data),
};
static int imx8mq_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 and reset together with the VPUs. The
* reset and clock enable inputs to the ADB is a logical OR of the
* VPU bits. In order to set the G2 fuse bits, the G2 clock must
* also be enabled.
*/
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1));
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1));
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);
}
return NOTIFY_OK;
}
static const struct imx8m_blk_ctrl_domain_data imx8mq_vpu_blk_ctl_domain_data[] = {
[IMX8MQ_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),
},
[IMX8MQ_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),
},
};
static const struct imx8m_blk_ctrl_data imx8mq_vpu_blk_ctl_dev_data = {
.max_reg = 0x14,
.power_notifier_fn = imx8mq_vpu_power_notifier,
.domains = imx8mq_vpu_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mq_vpu_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
}, {
.compatible = "fsl,imx8mp-media-blk-ctrl",
.data = &imx8mp_media_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mq-vpu-blk-ctrl",
.data = &imx8mq_vpu_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);
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