iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/drivers/pmdomain/imx/scu-pd.c
Ulf Hansson e2ad626f8f pmdomain: Rename the genpd subsystem to pmdomain 
It has been pointed out that naming a subsystem "genpd" isn't very
self-explanatory and the acronym itself that means Generic PM Domain, is
known only by a limited group of people.

In a way to improve the situation, let's rename the subsystem to pmdomain,
which ideally should indicate that this is about so called Power Domains or
"PM domains" as we often also use within the Linux Kernel terminology.

Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230912221127.487327-1-ulf.hansson@linaro.org
2023-09-13 11:09:21 +02:00

551 lines
16 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
* Copyright 2017-2018 NXP
* Dong Aisheng <aisheng.dong@nxp.com>
*
* Implementation of the SCU based Power Domains
*
* NOTE: a better implementation suggested by Ulf Hansson is using a
* single global power domain and implement the ->attach|detach_dev()
* callback for the genpd and use the regular of_genpd_add_provider_simple().
* From within the ->attach_dev(), we could get the OF node for
* the device that is being attached and then parse the power-domain
* cell containing the "resource id" and store that in the per device
* struct generic_pm_domain_data (we have void pointer there for
* storing these kind of things).
*
* Additionally, we need to implement the ->stop() and ->start()
* callbacks of genpd, which is where you "power on/off" devices,
* rather than using the above ->power_on|off() callbacks.
*
* However, there're two known issues:
* 1. The ->attach_dev() of power domain infrastructure still does
* not support multi domains case as the struct device *dev passed
* in is a virtual PD device, it does not help for parsing the real
* device resource id from device tree, so it's unware of which
* real sub power domain of device should be attached.
*
* The framework needs some proper extension to support multi power
* domain cases.
*
* Update: Genpd assigns the ->of_node for the virtual device before it
* invokes ->attach_dev() callback, hence parsing for device resources via
* DT should work fine.
*
* 2. It also breaks most of current drivers as the driver probe sequence
* behavior changed if removing ->power_on|off() callback and use
* ->start() and ->stop() instead. genpd_dev_pm_attach will only power
* up the domain and attach device, but will not call .start() which
* relies on device runtime pm. That means the device power is still
* not up before running driver probe function. For SCU enabled
* platforms, all device drivers accessing registers/clock without power
* domain enabled will trigger a HW access error. That means we need fix
* most drivers probe sequence with proper runtime pm.
*
* Update: Runtime PM support isn't necessary. Instead, this can easily be
* fixed in drivers by adding a call to dev_pm_domain_start() during probe.
*
* In summary, the second part needs to be addressed via minor updates to the
* relevant drivers, before the "single global power domain" model can be used.
*
*/
#include <dt-bindings/firmware/imx/rsrc.h>
#include <linux/console.h>
#include <linux/firmware/imx/sci.h>
#include <linux/firmware/imx/svc/rm.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_domain.h>
#include <linux/slab.h>
/* SCU Power Mode Protocol definition */
struct imx_sc_msg_req_set_resource_power_mode {
struct imx_sc_rpc_msg hdr;
u16 resource;
u8 mode;
} __packed __aligned(4);
struct req_get_resource_mode {
u16 resource;
};
struct resp_get_resource_mode {
u8 mode;
};
struct imx_sc_msg_req_get_resource_power_mode {
struct imx_sc_rpc_msg hdr;
union {
struct req_get_resource_mode req;
struct resp_get_resource_mode resp;
} data;
} __packed __aligned(4);
#define IMX_SCU_PD_NAME_SIZE 20
struct imx_sc_pm_domain {
struct generic_pm_domain pd;
char name[IMX_SCU_PD_NAME_SIZE];
u32 rsrc;
};
struct imx_sc_pd_range {
char *name;
u32 rsrc;
u8 num;
/* add domain index */
bool postfix;
u8 start_from;
};
struct imx_sc_pd_soc {
const struct imx_sc_pd_range *pd_ranges;
u8 num_ranges;
};
static int imx_con_rsrc;
/* Align with the IMX_SC_PM_PW_MODE_[OFF,STBY,LP,ON] macros */
static const char * const imx_sc_pm_mode[] = {
"IMX_SC_PM_PW_MODE_OFF",
"IMX_SC_PM_PW_MODE_STBY",
"IMX_SC_PM_PW_MODE_LP",
"IMX_SC_PM_PW_MODE_ON"
};
static const struct imx_sc_pd_range imx8qxp_scu_pd_ranges[] = {
/* LSIO SS */
{ "pwm", IMX_SC_R_PWM_0, 8, true, 0 },
{ "gpio", IMX_SC_R_GPIO_0, 8, true, 0 },
{ "gpt", IMX_SC_R_GPT_0, 5, true, 0 },
{ "kpp", IMX_SC_R_KPP, 1, false, 0 },
{ "fspi", IMX_SC_R_FSPI_0, 2, true, 0 },
{ "mu_a", IMX_SC_R_MU_0A, 14, true, 0 },
{ "mu_b", IMX_SC_R_MU_5B, 9, true, 5 },
/* CONN SS */
{ "usb", IMX_SC_R_USB_0, 2, true, 0 },
{ "usb0phy", IMX_SC_R_USB_0_PHY, 1, false, 0 },
{ "usb1phy", IMX_SC_R_USB_1_PHY, 1, false, 0},
{ "usb2", IMX_SC_R_USB_2, 1, false, 0 },
{ "usb2phy", IMX_SC_R_USB_2_PHY, 1, false, 0 },
{ "sdhc", IMX_SC_R_SDHC_0, 3, true, 0 },
{ "enet", IMX_SC_R_ENET_0, 2, true, 0 },
{ "nand", IMX_SC_R_NAND, 1, false, 0 },
{ "mlb", IMX_SC_R_MLB_0, 1, true, 0 },
/* AUDIO SS */
{ "audio-pll0", IMX_SC_R_AUDIO_PLL_0, 1, false, 0 },
{ "audio-pll1", IMX_SC_R_AUDIO_PLL_1, 1, false, 0 },
{ "audio-clk-0", IMX_SC_R_AUDIO_CLK_0, 1, false, 0 },
{ "audio-clk-1", IMX_SC_R_AUDIO_CLK_1, 1, false, 0 },
{ "mclk-out-0", IMX_SC_R_MCLK_OUT_0, 1, false, 0 },
{ "mclk-out-1", IMX_SC_R_MCLK_OUT_1, 1, false, 0 },
{ "dma0-ch", IMX_SC_R_DMA_0_CH0, 32, true, 0 },
{ "dma1-ch", IMX_SC_R_DMA_1_CH0, 16, true, 0 },
{ "dma2-ch", IMX_SC_R_DMA_2_CH0, 32, true, 0 },
{ "dma3-ch", IMX_SC_R_DMA_3_CH0, 32, true, 0 },
{ "asrc0", IMX_SC_R_ASRC_0, 1, false, 0 },
{ "asrc1", IMX_SC_R_ASRC_1, 1, false, 0 },
{ "esai0", IMX_SC_R_ESAI_0, 1, false, 0 },
{ "esai1", IMX_SC_R_ESAI_1, 1, false, 0 },
{ "spdif0", IMX_SC_R_SPDIF_0, 1, false, 0 },
{ "spdif1", IMX_SC_R_SPDIF_1, 1, false, 0 },
{ "sai", IMX_SC_R_SAI_0, 3, true, 0 },
{ "sai3", IMX_SC_R_SAI_3, 1, false, 0 },
{ "sai4", IMX_SC_R_SAI_4, 1, false, 0 },
{ "sai5", IMX_SC_R_SAI_5, 1, false, 0 },
{ "sai6", IMX_SC_R_SAI_6, 1, false, 0 },
{ "sai7", IMX_SC_R_SAI_7, 1, false, 0 },
{ "amix", IMX_SC_R_AMIX, 1, false, 0 },
{ "mqs0", IMX_SC_R_MQS_0, 1, false, 0 },
{ "dsp", IMX_SC_R_DSP, 1, false, 0 },
{ "dsp-ram", IMX_SC_R_DSP_RAM, 1, false, 0 },
/* DMA SS */
{ "can", IMX_SC_R_CAN_0, 3, true, 0 },
{ "ftm", IMX_SC_R_FTM_0, 2, true, 0 },
{ "lpi2c", IMX_SC_R_I2C_0, 5, true, 0 },
{ "adc", IMX_SC_R_ADC_0, 2, true, 0 },
{ "lcd", IMX_SC_R_LCD_0, 1, true, 0 },
{ "lcd-pll", IMX_SC_R_ELCDIF_PLL, 1, true, 0 },
{ "lcd0-pwm", IMX_SC_R_LCD_0_PWM_0, 1, true, 0 },
{ "lpuart", IMX_SC_R_UART_0, 5, true, 0 },
{ "sim", IMX_SC_R_EMVSIM_0, 2, true, 0 },
{ "lpspi", IMX_SC_R_SPI_0, 4, true, 0 },
{ "irqstr_dsp", IMX_SC_R_IRQSTR_DSP, 1, false, 0 },
/* VPU SS */
{ "vpu", IMX_SC_R_VPU, 1, false, 0 },
{ "vpu-pid", IMX_SC_R_VPU_PID0, 8, true, 0 },
{ "vpu-dec0", IMX_SC_R_VPU_DEC_0, 1, false, 0 },
{ "vpu-enc0", IMX_SC_R_VPU_ENC_0, 1, false, 0 },
{ "vpu-enc1", IMX_SC_R_VPU_ENC_1, 1, false, 0 },
{ "vpu-mu0", IMX_SC_R_VPU_MU_0, 1, false, 0 },
{ "vpu-mu1", IMX_SC_R_VPU_MU_1, 1, false, 0 },
{ "vpu-mu2", IMX_SC_R_VPU_MU_2, 1, false, 0 },
/* GPU SS */
{ "gpu0-pid", IMX_SC_R_GPU_0_PID0, 4, true, 0 },
{ "gpu1-pid", IMX_SC_R_GPU_1_PID0, 4, true, 0 },
/* HSIO SS */
{ "pcie-a", IMX_SC_R_PCIE_A, 1, false, 0 },
{ "serdes-0", IMX_SC_R_SERDES_0, 1, false, 0 },
{ "pcie-b", IMX_SC_R_PCIE_B, 1, false, 0 },
{ "serdes-1", IMX_SC_R_SERDES_1, 1, false, 0 },
{ "sata-0", IMX_SC_R_SATA_0, 1, false, 0 },
{ "hsio-gpio", IMX_SC_R_HSIO_GPIO, 1, false, 0 },
/* MIPI SS */
{ "mipi0", IMX_SC_R_MIPI_0, 1, false, 0 },
{ "mipi0-pwm0", IMX_SC_R_MIPI_0_PWM_0, 1, false, 0 },
{ "mipi0-i2c", IMX_SC_R_MIPI_0_I2C_0, 2, true, 0 },
{ "mipi1", IMX_SC_R_MIPI_1, 1, false, 0 },
{ "mipi1-pwm0", IMX_SC_R_MIPI_1_PWM_0, 1, false, 0 },
{ "mipi1-i2c", IMX_SC_R_MIPI_1_I2C_0, 2, true, 0 },
/* LVDS SS */
{ "lvds0", IMX_SC_R_LVDS_0, 1, false, 0 },
{ "lvds0-pwm", IMX_SC_R_LVDS_0_PWM_0, 1, false, 0 },
{ "lvds0-lpi2c", IMX_SC_R_LVDS_0_I2C_0, 2, true, 0 },
{ "lvds1", IMX_SC_R_LVDS_1, 1, false, 0 },
{ "lvds1-pwm", IMX_SC_R_LVDS_1_PWM_0, 1, false, 0 },
{ "lvds1-lpi2c", IMX_SC_R_LVDS_1_I2C_0, 2, true, 0 },
{ "mipi1", IMX_SC_R_MIPI_1, 1, 0 },
{ "mipi1-pwm0", IMX_SC_R_MIPI_1_PWM_0, 1, 0 },
{ "mipi1-i2c", IMX_SC_R_MIPI_1_I2C_0, 2, 1 },
{ "lvds1", IMX_SC_R_LVDS_1, 1, 0 },
/* DC SS */
{ "dc0", IMX_SC_R_DC_0, 1, false, 0 },
{ "dc0-pll", IMX_SC_R_DC_0_PLL_0, 2, true, 0 },
{ "dc0-video", IMX_SC_R_DC_0_VIDEO0, 2, true, 0 },
{ "dc1", IMX_SC_R_DC_1, 1, false, 0 },
{ "dc1-pll", IMX_SC_R_DC_1_PLL_0, 2, true, 0 },
{ "dc1-video", IMX_SC_R_DC_1_VIDEO0, 2, true, 0 },
/* CM40 SS */
{ "cm40-i2c", IMX_SC_R_M4_0_I2C, 1, false, 0 },
{ "cm40-intmux", IMX_SC_R_M4_0_INTMUX, 1, false, 0 },
{ "cm40-pid", IMX_SC_R_M4_0_PID0, 5, true, 0},
{ "cm40-mu-a1", IMX_SC_R_M4_0_MU_1A, 1, false, 0},
{ "cm40-lpuart", IMX_SC_R_M4_0_UART, 1, false, 0},
/* CM41 SS */
{ "cm41-i2c", IMX_SC_R_M4_1_I2C, 1, false, 0 },
{ "cm41-intmux", IMX_SC_R_M4_1_INTMUX, 1, false, 0 },
{ "cm41-pid", IMX_SC_R_M4_1_PID0, 5, true, 0},
{ "cm41-mu-a1", IMX_SC_R_M4_1_MU_1A, 1, false, 0},
{ "cm41-lpuart", IMX_SC_R_M4_1_UART, 1, false, 0},
/* CM41 SS */
{ "cm41_i2c", IMX_SC_R_M4_1_I2C, 1, false, 0 },
{ "cm41_intmux", IMX_SC_R_M4_1_INTMUX, 1, false, 0 },
/* DB SS */
{ "perf", IMX_SC_R_PERF, 1, false, 0},
/* IMAGE SS */
{ "img-jpegdec-mp", IMX_SC_R_MJPEG_DEC_MP, 1, false, 0 },
{ "img-jpegdec-s0", IMX_SC_R_MJPEG_DEC_S0, 4, true, 0 },
{ "img-jpegenc-mp", IMX_SC_R_MJPEG_ENC_MP, 1, false, 0 },
{ "img-jpegenc-s0", IMX_SC_R_MJPEG_ENC_S0, 4, true, 0 },
/* SECO SS */
{ "seco_mu", IMX_SC_R_SECO_MU_2, 3, true, 2},
/* V2X SS */
{ "v2x_mu", IMX_SC_R_V2X_MU_0, 2, true, 0},
{ "v2x_mu", IMX_SC_R_V2X_MU_2, 1, true, 2},
{ "v2x_mu", IMX_SC_R_V2X_MU_3, 2, true, 3},
{ "img-pdma", IMX_SC_R_ISI_CH0, 8, true, 0 },
{ "img-csi0", IMX_SC_R_CSI_0, 1, false, 0 },
{ "img-csi0-i2c0", IMX_SC_R_CSI_0_I2C_0, 1, false, 0 },
{ "img-csi0-pwm0", IMX_SC_R_CSI_0_PWM_0, 1, false, 0 },
{ "img-csi1", IMX_SC_R_CSI_1, 1, false, 0 },
{ "img-csi1-i2c0", IMX_SC_R_CSI_1_I2C_0, 1, false, 0 },
{ "img-csi1-pwm0", IMX_SC_R_CSI_1_PWM_0, 1, false, 0 },
{ "img-parallel", IMX_SC_R_PI_0, 1, false, 0 },
{ "img-parallel-i2c0", IMX_SC_R_PI_0_I2C_0, 1, false, 0 },
{ "img-parallel-pwm0", IMX_SC_R_PI_0_PWM_0, 2, true, 0 },
{ "img-parallel-pll", IMX_SC_R_PI_0_PLL, 1, false, 0 },
/* HDMI TX SS */
{ "hdmi-tx", IMX_SC_R_HDMI, 1, false, 0},
{ "hdmi-tx-i2s", IMX_SC_R_HDMI_I2S, 1, false, 0},
{ "hdmi-tx-i2c0", IMX_SC_R_HDMI_I2C_0, 1, false, 0},
{ "hdmi-tx-pll0", IMX_SC_R_HDMI_PLL_0, 1, false, 0},
{ "hdmi-tx-pll1", IMX_SC_R_HDMI_PLL_1, 1, false, 0},
/* HDMI RX SS */
{ "hdmi-rx", IMX_SC_R_HDMI_RX, 1, false, 0},
{ "hdmi-rx-pwm", IMX_SC_R_HDMI_RX_PWM_0, 1, false, 0},
{ "hdmi-rx-i2c0", IMX_SC_R_HDMI_RX_I2C_0, 1, false, 0},
{ "hdmi-rx-bypass", IMX_SC_R_HDMI_RX_BYPASS, 1, false, 0},
/* SECURITY SS */
{ "sec-jr", IMX_SC_R_CAAM_JR2, 2, true, 2},
/* BOARD SS */
{ "board", IMX_SC_R_BOARD_R0, 8, true, 0},
};
static const struct imx_sc_pd_soc imx8qxp_scu_pd = {
.pd_ranges = imx8qxp_scu_pd_ranges,
.num_ranges = ARRAY_SIZE(imx8qxp_scu_pd_ranges),
};
static struct imx_sc_ipc *pm_ipc_handle;
static inline struct imx_sc_pm_domain *
to_imx_sc_pd(struct generic_pm_domain *genpd)
{
return container_of(genpd, struct imx_sc_pm_domain, pd);
}
static void imx_sc_pd_get_console_rsrc(void)
{
struct of_phandle_args specs;
int ret;
if (!of_stdout)
return;
ret = of_parse_phandle_with_args(of_stdout, "power-domains",
"#power-domain-cells",
0, &specs);
if (ret)
return;
imx_con_rsrc = specs.args[0];
}
static int imx_sc_get_pd_power(struct device *dev, u32 rsrc)
{
struct imx_sc_msg_req_get_resource_power_mode msg;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
int ret;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = IMX_SC_RPC_SVC_PM;
hdr->func = IMX_SC_PM_FUNC_GET_RESOURCE_POWER_MODE;
hdr->size = 2;
msg.data.req.resource = rsrc;
ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true);
if (ret)
dev_err(dev, "failed to get power resource %d mode, ret %d\n",
rsrc, ret);
return msg.data.resp.mode;
}
static int imx_sc_pd_power(struct generic_pm_domain *domain, bool power_on)
{
struct imx_sc_msg_req_set_resource_power_mode msg;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
struct imx_sc_pm_domain *pd;
int ret;
pd = to_imx_sc_pd(domain);
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = IMX_SC_RPC_SVC_PM;
hdr->func = IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE;
hdr->size = 2;
msg.resource = pd->rsrc;
msg.mode = power_on ? IMX_SC_PM_PW_MODE_ON : IMX_SC_PM_PW_MODE_LP;
/* keep uart console power on for no_console_suspend */
if (imx_con_rsrc == pd->rsrc && !console_suspend_enabled && !power_on)
return -EBUSY;
ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true);
if (ret)
dev_err(&domain->dev, "failed to power %s resource %d ret %d\n",
power_on ? "up" : "off", pd->rsrc, ret);
return ret;
}
static int imx_sc_pd_power_on(struct generic_pm_domain *domain)
{
return imx_sc_pd_power(domain, true);
}
static int imx_sc_pd_power_off(struct generic_pm_domain *domain)
{
return imx_sc_pd_power(domain, false);
}
static struct generic_pm_domain *imx_scu_pd_xlate(struct of_phandle_args *spec,
void *data)
{
struct generic_pm_domain *domain = ERR_PTR(-ENOENT);
struct genpd_onecell_data *pd_data = data;
unsigned int i;
for (i = 0; i < pd_data->num_domains; i++) {
struct imx_sc_pm_domain *sc_pd;
sc_pd = to_imx_sc_pd(pd_data->domains[i]);
if (sc_pd->rsrc == spec->args[0]) {
domain = &sc_pd->pd;
break;
}
}
return domain;
}
static struct imx_sc_pm_domain *
imx_scu_add_pm_domain(struct device *dev, int idx,
const struct imx_sc_pd_range *pd_ranges)
{
struct imx_sc_pm_domain *sc_pd;
bool is_off;
int mode, ret;
if (!imx_sc_rm_is_resource_owned(pm_ipc_handle, pd_ranges->rsrc + idx))
return NULL;
sc_pd = devm_kzalloc(dev, sizeof(*sc_pd), GFP_KERNEL);
if (!sc_pd)
return ERR_PTR(-ENOMEM);
sc_pd->rsrc = pd_ranges->rsrc + idx;
sc_pd->pd.power_off = imx_sc_pd_power_off;
sc_pd->pd.power_on = imx_sc_pd_power_on;
if (pd_ranges->postfix)
snprintf(sc_pd->name, sizeof(sc_pd->name),
"%s%i", pd_ranges->name, pd_ranges->start_from + idx);
else
snprintf(sc_pd->name, sizeof(sc_pd->name),
"%s", pd_ranges->name);
sc_pd->pd.name = sc_pd->name;
if (imx_con_rsrc == sc_pd->rsrc)
sc_pd->pd.flags = GENPD_FLAG_RPM_ALWAYS_ON;
mode = imx_sc_get_pd_power(dev, pd_ranges->rsrc + idx);
if (mode == IMX_SC_PM_PW_MODE_ON)
is_off = false;
else
is_off = true;
dev_dbg(dev, "%s : %s\n", sc_pd->name, imx_sc_pm_mode[mode]);
if (sc_pd->rsrc >= IMX_SC_R_LAST) {
dev_warn(dev, "invalid pd %s rsrc id %d found",
sc_pd->name, sc_pd->rsrc);
devm_kfree(dev, sc_pd);
return NULL;
}
ret = pm_genpd_init(&sc_pd->pd, NULL, is_off);
if (ret) {
dev_warn(dev, "failed to init pd %s rsrc id %d",
sc_pd->name, sc_pd->rsrc);
devm_kfree(dev, sc_pd);
return NULL;
}
return sc_pd;
}
static int imx_scu_init_pm_domains(struct device *dev,
const struct imx_sc_pd_soc *pd_soc)
{
const struct imx_sc_pd_range *pd_ranges = pd_soc->pd_ranges;
struct generic_pm_domain **domains;
struct genpd_onecell_data *pd_data;
struct imx_sc_pm_domain *sc_pd;
u32 count = 0;
int i, j;
for (i = 0; i < pd_soc->num_ranges; i++)
count += pd_ranges[i].num;
domains = devm_kcalloc(dev, count, sizeof(*domains), GFP_KERNEL);
if (!domains)
return -ENOMEM;
pd_data = devm_kzalloc(dev, sizeof(*pd_data), GFP_KERNEL);
if (!pd_data)
return -ENOMEM;
count = 0;
for (i = 0; i < pd_soc->num_ranges; i++) {
for (j = 0; j < pd_ranges[i].num; j++) {
sc_pd = imx_scu_add_pm_domain(dev, j, &pd_ranges[i]);
if (IS_ERR_OR_NULL(sc_pd))
continue;
domains[count++] = &sc_pd->pd;
dev_dbg(dev, "added power domain %s\n", sc_pd->pd.name);
}
}
pd_data->domains = domains;
pd_data->num_domains = count;
pd_data->xlate = imx_scu_pd_xlate;
of_genpd_add_provider_onecell(dev->of_node, pd_data);
return 0;
}
static int imx_sc_pd_probe(struct platform_device *pdev)
{
const struct imx_sc_pd_soc *pd_soc;
int ret;
ret = imx_scu_get_handle(&pm_ipc_handle);
if (ret)
return ret;
pd_soc = of_device_get_match_data(&pdev->dev);
if (!pd_soc)
return -ENODEV;
imx_sc_pd_get_console_rsrc();
return imx_scu_init_pm_domains(&pdev->dev, pd_soc);
}
static const struct of_device_id imx_sc_pd_match[] = {
{ .compatible = "fsl,imx8qxp-scu-pd", &imx8qxp_scu_pd},
{ .compatible = "fsl,scu-pd", &imx8qxp_scu_pd},
{ /* sentinel */ }
};
static struct platform_driver imx_sc_pd_driver = {
.driver = {
.name = "imx-scu-pd",
.of_match_table = imx_sc_pd_match,
.suppress_bind_attrs = true,
},
.probe = imx_sc_pd_probe,
};
builtin_platform_driver(imx_sc_pd_driver);
MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
MODULE_DESCRIPTION("IMX SCU Power Domain driver");
MODULE_LICENSE("GPL v2");
Reference in New Issue View Git Blame Copy Permalink