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linux/drivers/soc/imx/gpcv2.c
Lucas Stach da4112230f soc: imx: gpcv2: support system suspend/resume 
Our usage of runtime PM to control the hierarchy of power domains is
slightly unusual and means that powering up a domain may fail in early
system resume, as runtime PM is still disallowed at this stage.

However the system suspend/resume path takes care of powering down/up
the power domains in the order defined by the device parent/child and
power-domain provider/consumer hierarachy. So we can just runtime
resume all our power-domain devices to allow the power-up to work
properly in the resume path. System suspend will still disable all
domains as intended.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-10-06 20:13:45 +08:00

1106 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2017 Impinj, Inc
* Author: Andrey Smirnov <andrew.smirnov@gmail.com>
*
* Based on the code of analogus driver:
*
* Copyright 2015-2017 Pengutronix, Lucas Stach <kernel@pengutronix.de>
*/
#include <linux/clk.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/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/sizes.h>
#include <dt-bindings/power/imx7-power.h>
#include <dt-bindings/power/imx8mq-power.h>
#include <dt-bindings/power/imx8mm-power.h>
#include <dt-bindings/power/imx8mn-power.h>
#define GPC_LPCR_A_CORE_BSC 0x000
#define GPC_PGC_CPU_MAPPING 0x0ec
#define IMX7_USB_HSIC_PHY_A_CORE_DOMAIN BIT(6)
#define IMX7_USB_OTG2_PHY_A_CORE_DOMAIN BIT(5)
#define IMX7_USB_OTG1_PHY_A_CORE_DOMAIN BIT(4)
#define IMX7_PCIE_PHY_A_CORE_DOMAIN BIT(3)
#define IMX7_MIPI_PHY_A_CORE_DOMAIN BIT(2)
#define IMX8M_PCIE2_A53_DOMAIN BIT(15)
#define IMX8M_MIPI_CSI2_A53_DOMAIN BIT(14)
#define IMX8M_MIPI_CSI1_A53_DOMAIN BIT(13)
#define IMX8M_DISP_A53_DOMAIN BIT(12)
#define IMX8M_HDMI_A53_DOMAIN BIT(11)
#define IMX8M_VPU_A53_DOMAIN BIT(10)
#define IMX8M_GPU_A53_DOMAIN BIT(9)
#define IMX8M_DDR2_A53_DOMAIN BIT(8)
#define IMX8M_DDR1_A53_DOMAIN BIT(7)
#define IMX8M_OTG2_A53_DOMAIN BIT(5)
#define IMX8M_OTG1_A53_DOMAIN BIT(4)
#define IMX8M_PCIE1_A53_DOMAIN BIT(3)
#define IMX8M_MIPI_A53_DOMAIN BIT(2)
#define IMX8MM_VPUH1_A53_DOMAIN BIT(15)
#define IMX8MM_VPUG2_A53_DOMAIN BIT(14)
#define IMX8MM_VPUG1_A53_DOMAIN BIT(13)
#define IMX8MM_DISPMIX_A53_DOMAIN BIT(12)
#define IMX8MM_VPUMIX_A53_DOMAIN BIT(10)
#define IMX8MM_GPUMIX_A53_DOMAIN BIT(9)
#define IMX8MM_GPU_A53_DOMAIN (BIT(8) | BIT(11))
#define IMX8MM_DDR1_A53_DOMAIN BIT(7)
#define IMX8MM_OTG2_A53_DOMAIN BIT(5)
#define IMX8MM_OTG1_A53_DOMAIN BIT(4)
#define IMX8MM_PCIE_A53_DOMAIN BIT(3)
#define IMX8MM_MIPI_A53_DOMAIN BIT(2)
#define IMX8MN_DISPMIX_A53_DOMAIN BIT(12)
#define IMX8MN_GPUMIX_A53_DOMAIN BIT(9)
#define IMX8MN_DDR1_A53_DOMAIN BIT(7)
#define IMX8MN_OTG1_A53_DOMAIN BIT(4)
#define IMX8MN_MIPI_A53_DOMAIN BIT(2)
#define GPC_PU_PGC_SW_PUP_REQ 0x0f8
#define GPC_PU_PGC_SW_PDN_REQ 0x104
#define IMX7_USB_HSIC_PHY_SW_Pxx_REQ BIT(4)
#define IMX7_USB_OTG2_PHY_SW_Pxx_REQ BIT(3)
#define IMX7_USB_OTG1_PHY_SW_Pxx_REQ BIT(2)
#define IMX7_PCIE_PHY_SW_Pxx_REQ BIT(1)
#define IMX7_MIPI_PHY_SW_Pxx_REQ BIT(0)
#define IMX8M_PCIE2_SW_Pxx_REQ BIT(13)
#define IMX8M_MIPI_CSI2_SW_Pxx_REQ BIT(12)
#define IMX8M_MIPI_CSI1_SW_Pxx_REQ BIT(11)
#define IMX8M_DISP_SW_Pxx_REQ BIT(10)
#define IMX8M_HDMI_SW_Pxx_REQ BIT(9)
#define IMX8M_VPU_SW_Pxx_REQ BIT(8)
#define IMX8M_GPU_SW_Pxx_REQ BIT(7)
#define IMX8M_DDR2_SW_Pxx_REQ BIT(6)
#define IMX8M_DDR1_SW_Pxx_REQ BIT(5)
#define IMX8M_OTG2_SW_Pxx_REQ BIT(3)
#define IMX8M_OTG1_SW_Pxx_REQ BIT(2)
#define IMX8M_PCIE1_SW_Pxx_REQ BIT(1)
#define IMX8M_MIPI_SW_Pxx_REQ BIT(0)
#define IMX8MM_VPUH1_SW_Pxx_REQ BIT(13)
#define IMX8MM_VPUG2_SW_Pxx_REQ BIT(12)
#define IMX8MM_VPUG1_SW_Pxx_REQ BIT(11)
#define IMX8MM_DISPMIX_SW_Pxx_REQ BIT(10)
#define IMX8MM_VPUMIX_SW_Pxx_REQ BIT(8)
#define IMX8MM_GPUMIX_SW_Pxx_REQ BIT(7)
#define IMX8MM_GPU_SW_Pxx_REQ (BIT(6) | BIT(9))
#define IMX8MM_DDR1_SW_Pxx_REQ BIT(5)
#define IMX8MM_OTG2_SW_Pxx_REQ BIT(3)
#define IMX8MM_OTG1_SW_Pxx_REQ BIT(2)
#define IMX8MM_PCIE_SW_Pxx_REQ BIT(1)
#define IMX8MM_MIPI_SW_Pxx_REQ BIT(0)
#define IMX8MN_DISPMIX_SW_Pxx_REQ BIT(10)
#define IMX8MN_GPUMIX_SW_Pxx_REQ BIT(7)
#define IMX8MN_DDR1_SW_Pxx_REQ BIT(5)
#define IMX8MN_OTG1_SW_Pxx_REQ BIT(2)
#define IMX8MN_MIPI_SW_Pxx_REQ BIT(0)
#define GPC_M4_PU_PDN_FLG 0x1bc
#define GPC_PU_PWRHSK 0x1fc
#define IMX8M_GPU_HSK_PWRDNACKN BIT(26)
#define IMX8M_VPU_HSK_PWRDNACKN BIT(25)
#define IMX8M_DISP_HSK_PWRDNACKN BIT(24)
#define IMX8M_GPU_HSK_PWRDNREQN BIT(6)
#define IMX8M_VPU_HSK_PWRDNREQN BIT(5)
#define IMX8M_DISP_HSK_PWRDNREQN BIT(4)
#define IMX8MM_GPUMIX_HSK_PWRDNACKN BIT(29)
#define IMX8MM_GPU_HSK_PWRDNACKN (BIT(27) | BIT(28))
#define IMX8MM_VPUMIX_HSK_PWRDNACKN BIT(26)
#define IMX8MM_DISPMIX_HSK_PWRDNACKN BIT(25)
#define IMX8MM_HSIO_HSK_PWRDNACKN (BIT(23) | BIT(24))
#define IMX8MM_GPUMIX_HSK_PWRDNREQN BIT(11)
#define IMX8MM_GPU_HSK_PWRDNREQN (BIT(9) | BIT(10))
#define IMX8MM_VPUMIX_HSK_PWRDNREQN BIT(8)
#define IMX8MM_DISPMIX_HSK_PWRDNREQN BIT(7)
#define IMX8MM_HSIO_HSK_PWRDNREQN (BIT(5) | BIT(6))
#define IMX8MN_GPUMIX_HSK_PWRDNACKN (BIT(29) | BIT(27))
#define IMX8MN_DISPMIX_HSK_PWRDNACKN BIT(25)
#define IMX8MN_HSIO_HSK_PWRDNACKN BIT(23)
#define IMX8MN_GPUMIX_HSK_PWRDNREQN (BIT(11) | BIT(9))
#define IMX8MN_DISPMIX_HSK_PWRDNREQN BIT(7)
#define IMX8MN_HSIO_HSK_PWRDNREQN BIT(5)
/*
* The PGC offset values in Reference Manual
* (Rev. 1, 01/2018 and the older ones) GPC chapter's
* GPC_PGC memory map are incorrect, below offset
* values are from design RTL.
*/
#define IMX7_PGC_MIPI 16
#define IMX7_PGC_PCIE 17
#define IMX7_PGC_USB_HSIC 20
#define IMX8M_PGC_MIPI 16
#define IMX8M_PGC_PCIE1 17
#define IMX8M_PGC_OTG1 18
#define IMX8M_PGC_OTG2 19
#define IMX8M_PGC_DDR1 21
#define IMX8M_PGC_GPU 23
#define IMX8M_PGC_VPU 24
#define IMX8M_PGC_DISP 26
#define IMX8M_PGC_MIPI_CSI1 27
#define IMX8M_PGC_MIPI_CSI2 28
#define IMX8M_PGC_PCIE2 29
#define IMX8MM_PGC_MIPI 16
#define IMX8MM_PGC_PCIE 17
#define IMX8MM_PGC_OTG1 18
#define IMX8MM_PGC_OTG2 19
#define IMX8MM_PGC_DDR1 21
#define IMX8MM_PGC_GPU2D 22
#define IMX8MM_PGC_GPUMIX 23
#define IMX8MM_PGC_VPUMIX 24
#define IMX8MM_PGC_GPU3D 25
#define IMX8MM_PGC_DISPMIX 26
#define IMX8MM_PGC_VPUG1 27
#define IMX8MM_PGC_VPUG2 28
#define IMX8MM_PGC_VPUH1 29
#define IMX8MN_PGC_MIPI 16
#define IMX8MN_PGC_OTG1 18
#define IMX8MN_PGC_DDR1 21
#define IMX8MN_PGC_GPUMIX 23
#define IMX8MN_PGC_DISPMIX 26
#define GPC_PGC_CTRL(n) (0x800 + (n) * 0x40)
#define GPC_PGC_SR(n) (GPC_PGC_CTRL(n) + 0xc)
#define GPC_PGC_CTRL_PCR BIT(0)
struct imx_pgc_domain {
struct generic_pm_domain genpd;
struct regmap *regmap;
struct regulator *regulator;
struct reset_control *reset;
struct clk_bulk_data *clks;
int num_clks;
unsigned long pgc;
const struct {
u32 pxx;
u32 map;
u32 hskreq;
u32 hskack;
} bits;
const int voltage;
const bool keep_clocks;
struct device *dev;
};
struct imx_pgc_domain_data {
const struct imx_pgc_domain *domains;
size_t domains_num;
const struct regmap_access_table *reg_access_table;
};
static inline struct imx_pgc_domain *
to_imx_pgc_domain(struct generic_pm_domain *genpd)
{
return container_of(genpd, struct imx_pgc_domain, genpd);
}
static int imx_pgc_power_up(struct generic_pm_domain *genpd)
{
struct imx_pgc_domain *domain = to_imx_pgc_domain(genpd);
u32 reg_val, pgc;
int ret;
ret = pm_runtime_get_sync(domain->dev);
if (ret < 0) {
pm_runtime_put_noidle(domain->dev);
return ret;
}
if (!IS_ERR(domain->regulator)) {
ret = regulator_enable(domain->regulator);
if (ret) {
dev_err(domain->dev, "failed to enable regulator\n");
goto out_put_pm;
}
}
/* Enable reset clocks for all devices in the domain */
ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
if (ret) {
dev_err(domain->dev, "failed to enable reset clocks\n");
goto out_regulator_disable;
}
reset_control_assert(domain->reset);
if (domain->bits.pxx) {
/* request the domain to power up */
regmap_update_bits(domain->regmap, GPC_PU_PGC_SW_PUP_REQ,
domain->bits.pxx, domain->bits.pxx);
/*
* As per "5.5.9.4 Example Code 4" in IMX7DRM.pdf wait
* for PUP_REQ/PDN_REQ bit to be cleared
*/
ret = regmap_read_poll_timeout(domain->regmap,
GPC_PU_PGC_SW_PUP_REQ, reg_val,
!(reg_val & domain->bits.pxx),
0, USEC_PER_MSEC);
if (ret) {
dev_err(domain->dev, "failed to command PGC\n");
goto out_clk_disable;
}
/* disable power control */
for_each_set_bit(pgc, &domain->pgc, 32) {
regmap_clear_bits(domain->regmap, GPC_PGC_CTRL(pgc),
GPC_PGC_CTRL_PCR);
}
}
/* delay for reset to propagate */
udelay(5);
reset_control_deassert(domain->reset);
/* request the ADB400 to power up */
if (domain->bits.hskreq) {
regmap_update_bits(domain->regmap, GPC_PU_PWRHSK,
domain->bits.hskreq, domain->bits.hskreq);
/*
* ret = regmap_read_poll_timeout(domain->regmap, GPC_PU_PWRHSK, reg_val,
* (reg_val & domain->bits.hskack), 0,
* USEC_PER_MSEC);
* Technically we need the commented code to wait handshake. But that needs
* the BLK-CTL module BUS clk-en bit being set.
*
* There is a separate BLK-CTL module and we will have such a driver for it,
* that driver will set the BUS clk-en bit and handshake will be triggered
* automatically there. Just add a delay and suppose the handshake finish
* after that.
*/
}
/* Disable reset clocks for all devices in the domain */
if (!domain->keep_clocks)
clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
return 0;
out_clk_disable:
clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
out_regulator_disable:
if (!IS_ERR(domain->regulator))
regulator_disable(domain->regulator);
out_put_pm:
pm_runtime_put(domain->dev);
return ret;
}
static int imx_pgc_power_down(struct generic_pm_domain *genpd)
{
struct imx_pgc_domain *domain = to_imx_pgc_domain(genpd);
u32 reg_val, pgc;
int ret;
/* Enable reset clocks for all devices in the domain */
if (!domain->keep_clocks) {
ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
if (ret) {
dev_err(domain->dev, "failed to enable reset clocks\n");
return ret;
}
}
/* request the ADB400 to power down */
if (domain->bits.hskreq) {
regmap_clear_bits(domain->regmap, GPC_PU_PWRHSK,
domain->bits.hskreq);
ret = regmap_read_poll_timeout(domain->regmap, GPC_PU_PWRHSK,
reg_val,
!(reg_val & domain->bits.hskack),
0, USEC_PER_MSEC);
if (ret) {
dev_err(domain->dev, "failed to power down ADB400\n");
goto out_clk_disable;
}
}
if (domain->bits.pxx) {
/* enable power control */
for_each_set_bit(pgc, &domain->pgc, 32) {
regmap_update_bits(domain->regmap, GPC_PGC_CTRL(pgc),
GPC_PGC_CTRL_PCR, GPC_PGC_CTRL_PCR);
}
/* request the domain to power down */
regmap_update_bits(domain->regmap, GPC_PU_PGC_SW_PDN_REQ,
domain->bits.pxx, domain->bits.pxx);
/*
* As per "5.5.9.4 Example Code 4" in IMX7DRM.pdf wait
* for PUP_REQ/PDN_REQ bit to be cleared
*/
ret = regmap_read_poll_timeout(domain->regmap,
GPC_PU_PGC_SW_PDN_REQ, reg_val,
!(reg_val & domain->bits.pxx),
0, USEC_PER_MSEC);
if (ret) {
dev_err(domain->dev, "failed to command PGC\n");
goto out_clk_disable;
}
}
/* Disable reset clocks for all devices in the domain */
clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
if (!IS_ERR(domain->regulator)) {
ret = regulator_disable(domain->regulator);
if (ret) {
dev_err(domain->dev, "failed to disable regulator\n");
return ret;
}
}
pm_runtime_put(domain->dev);
return 0;
out_clk_disable:
clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
return ret;
}
static const struct imx_pgc_domain imx7_pgc_domains[] = {
[IMX7_POWER_DOMAIN_MIPI_PHY] = {
.genpd = {
.name = "mipi-phy",
},
.bits = {
.pxx = IMX7_MIPI_PHY_SW_Pxx_REQ,
.map = IMX7_MIPI_PHY_A_CORE_DOMAIN,
},
.voltage = 1000000,
.pgc = BIT(IMX7_PGC_MIPI),
},
[IMX7_POWER_DOMAIN_PCIE_PHY] = {
.genpd = {
.name = "pcie-phy",
},
.bits = {
.pxx = IMX7_PCIE_PHY_SW_Pxx_REQ,
.map = IMX7_PCIE_PHY_A_CORE_DOMAIN,
},
.voltage = 1000000,
.pgc = BIT(IMX7_PGC_PCIE),
},
[IMX7_POWER_DOMAIN_USB_HSIC_PHY] = {
.genpd = {
.name = "usb-hsic-phy",
},
.bits = {
.pxx = IMX7_USB_HSIC_PHY_SW_Pxx_REQ,
.map = IMX7_USB_HSIC_PHY_A_CORE_DOMAIN,
},
.voltage = 1200000,
.pgc = BIT(IMX7_PGC_USB_HSIC),
},
};
static const struct regmap_range imx7_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
GPC_M4_PU_PDN_FLG),
regmap_reg_range(GPC_PGC_CTRL(IMX7_PGC_MIPI),
GPC_PGC_SR(IMX7_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX7_PGC_PCIE),
GPC_PGC_SR(IMX7_PGC_PCIE)),
regmap_reg_range(GPC_PGC_CTRL(IMX7_PGC_USB_HSIC),
GPC_PGC_SR(IMX7_PGC_USB_HSIC)),
};
static const struct regmap_access_table imx7_access_table = {
.yes_ranges = imx7_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(imx7_yes_ranges),
};
static const struct imx_pgc_domain_data imx7_pgc_domain_data = {
.domains = imx7_pgc_domains,
.domains_num = ARRAY_SIZE(imx7_pgc_domains),
.reg_access_table = &imx7_access_table,
};
static const struct imx_pgc_domain imx8m_pgc_domains[] = {
[IMX8M_POWER_DOMAIN_MIPI] = {
.genpd = {
.name = "mipi",
},
.bits = {
.pxx = IMX8M_MIPI_SW_Pxx_REQ,
.map = IMX8M_MIPI_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_MIPI),
},
[IMX8M_POWER_DOMAIN_PCIE1] = {
.genpd = {
.name = "pcie1",
},
.bits = {
.pxx = IMX8M_PCIE1_SW_Pxx_REQ,
.map = IMX8M_PCIE1_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_PCIE1),
},
[IMX8M_POWER_DOMAIN_USB_OTG1] = {
.genpd = {
.name = "usb-otg1",
},
.bits = {
.pxx = IMX8M_OTG1_SW_Pxx_REQ,
.map = IMX8M_OTG1_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_OTG1),
},
[IMX8M_POWER_DOMAIN_USB_OTG2] = {
.genpd = {
.name = "usb-otg2",
},
.bits = {
.pxx = IMX8M_OTG2_SW_Pxx_REQ,
.map = IMX8M_OTG2_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_OTG2),
},
[IMX8M_POWER_DOMAIN_DDR1] = {
.genpd = {
.name = "ddr1",
},
.bits = {
.pxx = IMX8M_DDR1_SW_Pxx_REQ,
.map = IMX8M_DDR2_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_DDR1),
},
[IMX8M_POWER_DOMAIN_GPU] = {
.genpd = {
.name = "gpu",
},
.bits = {
.pxx = IMX8M_GPU_SW_Pxx_REQ,
.map = IMX8M_GPU_A53_DOMAIN,
.hskreq = IMX8M_GPU_HSK_PWRDNREQN,
.hskack = IMX8M_GPU_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8M_PGC_GPU),
},
[IMX8M_POWER_DOMAIN_VPU] = {
.genpd = {
.name = "vpu",
},
.bits = {
.pxx = IMX8M_VPU_SW_Pxx_REQ,
.map = IMX8M_VPU_A53_DOMAIN,
.hskreq = IMX8M_VPU_HSK_PWRDNREQN,
.hskack = IMX8M_VPU_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8M_PGC_VPU),
.keep_clocks = true,
},
[IMX8M_POWER_DOMAIN_DISP] = {
.genpd = {
.name = "disp",
},
.bits = {
.pxx = IMX8M_DISP_SW_Pxx_REQ,
.map = IMX8M_DISP_A53_DOMAIN,
.hskreq = IMX8M_DISP_HSK_PWRDNREQN,
.hskack = IMX8M_DISP_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8M_PGC_DISP),
},
[IMX8M_POWER_DOMAIN_MIPI_CSI1] = {
.genpd = {
.name = "mipi-csi1",
},
.bits = {
.pxx = IMX8M_MIPI_CSI1_SW_Pxx_REQ,
.map = IMX8M_MIPI_CSI1_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_MIPI_CSI1),
},
[IMX8M_POWER_DOMAIN_MIPI_CSI2] = {
.genpd = {
.name = "mipi-csi2",
},
.bits = {
.pxx = IMX8M_MIPI_CSI2_SW_Pxx_REQ,
.map = IMX8M_MIPI_CSI2_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_MIPI_CSI2),
},
[IMX8M_POWER_DOMAIN_PCIE2] = {
.genpd = {
.name = "pcie2",
},
.bits = {
.pxx = IMX8M_PCIE2_SW_Pxx_REQ,
.map = IMX8M_PCIE2_A53_DOMAIN,
},
.pgc = BIT(IMX8M_PGC_PCIE2),
},
};
static const struct regmap_range imx8m_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
GPC_PU_PWRHSK),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_MIPI),
GPC_PGC_SR(IMX8M_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_PCIE1),
GPC_PGC_SR(IMX8M_PGC_PCIE1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_OTG1),
GPC_PGC_SR(IMX8M_PGC_OTG1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_OTG2),
GPC_PGC_SR(IMX8M_PGC_OTG2)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_DDR1),
GPC_PGC_SR(IMX8M_PGC_DDR1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_GPU),
GPC_PGC_SR(IMX8M_PGC_GPU)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_VPU),
GPC_PGC_SR(IMX8M_PGC_VPU)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_DISP),
GPC_PGC_SR(IMX8M_PGC_DISP)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_MIPI_CSI1),
GPC_PGC_SR(IMX8M_PGC_MIPI_CSI1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_MIPI_CSI2),
GPC_PGC_SR(IMX8M_PGC_MIPI_CSI2)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_PCIE2),
GPC_PGC_SR(IMX8M_PGC_PCIE2)),
};
static const struct regmap_access_table imx8m_access_table = {
.yes_ranges = imx8m_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(imx8m_yes_ranges),
};
static const struct imx_pgc_domain_data imx8m_pgc_domain_data = {
.domains = imx8m_pgc_domains,
.domains_num = ARRAY_SIZE(imx8m_pgc_domains),
.reg_access_table = &imx8m_access_table,
};
static const struct imx_pgc_domain imx8mm_pgc_domains[] = {
[IMX8MM_POWER_DOMAIN_HSIOMIX] = {
.genpd = {
.name = "hsiomix",
},
.bits = {
.pxx = 0, /* no power sequence control */
.map = 0, /* no power sequence control */
.hskreq = IMX8MM_HSIO_HSK_PWRDNREQN,
.hskack = IMX8MM_HSIO_HSK_PWRDNACKN,
},
.keep_clocks = true,
},
[IMX8MM_POWER_DOMAIN_PCIE] = {
.genpd = {
.name = "pcie",
},
.bits = {
.pxx = IMX8MM_PCIE_SW_Pxx_REQ,
.map = IMX8MM_PCIE_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_PCIE),
},
[IMX8MM_POWER_DOMAIN_OTG1] = {
.genpd = {
.name = "usb-otg1",
},
.bits = {
.pxx = IMX8MM_OTG1_SW_Pxx_REQ,
.map = IMX8MM_OTG1_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_OTG1),
},
[IMX8MM_POWER_DOMAIN_OTG2] = {
.genpd = {
.name = "usb-otg2",
},
.bits = {
.pxx = IMX8MM_OTG2_SW_Pxx_REQ,
.map = IMX8MM_OTG2_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_OTG2),
},
[IMX8MM_POWER_DOMAIN_GPUMIX] = {
.genpd = {
.name = "gpumix",
},
.bits = {
.pxx = IMX8MM_GPUMIX_SW_Pxx_REQ,
.map = IMX8MM_GPUMIX_A53_DOMAIN,
.hskreq = IMX8MM_GPUMIX_HSK_PWRDNREQN,
.hskack = IMX8MM_GPUMIX_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8MM_PGC_GPUMIX),
.keep_clocks = true,
},
[IMX8MM_POWER_DOMAIN_GPU] = {
.genpd = {
.name = "gpu",
},
.bits = {
.pxx = IMX8MM_GPU_SW_Pxx_REQ,
.map = IMX8MM_GPU_A53_DOMAIN,
.hskreq = IMX8MM_GPU_HSK_PWRDNREQN,
.hskack = IMX8MM_GPU_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8MM_PGC_GPU2D) | BIT(IMX8MM_PGC_GPU3D),
},
[IMX8MM_POWER_DOMAIN_VPUMIX] = {
.genpd = {
.name = "vpumix",
},
.bits = {
.pxx = IMX8MM_VPUMIX_SW_Pxx_REQ,
.map = IMX8MM_VPUMIX_A53_DOMAIN,
.hskreq = IMX8MM_VPUMIX_HSK_PWRDNREQN,
.hskack = IMX8MM_VPUMIX_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8MM_PGC_VPUMIX),
.keep_clocks = true,
},
[IMX8MM_POWER_DOMAIN_VPUG1] = {
.genpd = {
.name = "vpu-g1",
},
.bits = {
.pxx = IMX8MM_VPUG1_SW_Pxx_REQ,
.map = IMX8MM_VPUG1_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_VPUG1),
},
[IMX8MM_POWER_DOMAIN_VPUG2] = {
.genpd = {
.name = "vpu-g2",
},
.bits = {
.pxx = IMX8MM_VPUG2_SW_Pxx_REQ,
.map = IMX8MM_VPUG2_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_VPUG2),
},
[IMX8MM_POWER_DOMAIN_VPUH1] = {
.genpd = {
.name = "vpu-h1",
},
.bits = {
.pxx = IMX8MM_VPUH1_SW_Pxx_REQ,
.map = IMX8MM_VPUH1_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_VPUH1),
},
[IMX8MM_POWER_DOMAIN_DISPMIX] = {
.genpd = {
.name = "dispmix",
},
.bits = {
.pxx = IMX8MM_DISPMIX_SW_Pxx_REQ,
.map = IMX8MM_DISPMIX_A53_DOMAIN,
.hskreq = IMX8MM_DISPMIX_HSK_PWRDNREQN,
.hskack = IMX8MM_DISPMIX_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8MM_PGC_DISPMIX),
.keep_clocks = true,
},
[IMX8MM_POWER_DOMAIN_MIPI] = {
.genpd = {
.name = "mipi",
},
.bits = {
.pxx = IMX8MM_MIPI_SW_Pxx_REQ,
.map = IMX8MM_MIPI_A53_DOMAIN,
},
.pgc = BIT(IMX8MM_PGC_MIPI),
},
};
static const struct regmap_range imx8mm_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
GPC_PU_PWRHSK),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_MIPI),
GPC_PGC_SR(IMX8MM_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_PCIE),
GPC_PGC_SR(IMX8MM_PGC_PCIE)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_OTG1),
GPC_PGC_SR(IMX8MM_PGC_OTG1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_OTG2),
GPC_PGC_SR(IMX8MM_PGC_OTG2)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_DDR1),
GPC_PGC_SR(IMX8MM_PGC_DDR1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_GPU2D),
GPC_PGC_SR(IMX8MM_PGC_GPU2D)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_GPUMIX),
GPC_PGC_SR(IMX8MM_PGC_GPUMIX)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_VPUMIX),
GPC_PGC_SR(IMX8MM_PGC_VPUMIX)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_GPU3D),
GPC_PGC_SR(IMX8MM_PGC_GPU3D)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_DISPMIX),
GPC_PGC_SR(IMX8MM_PGC_DISPMIX)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_VPUG1),
GPC_PGC_SR(IMX8MM_PGC_VPUG1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_VPUG2),
GPC_PGC_SR(IMX8MM_PGC_VPUG2)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MM_PGC_VPUH1),
GPC_PGC_SR(IMX8MM_PGC_VPUH1)),
};
static const struct regmap_access_table imx8mm_access_table = {
.yes_ranges = imx8mm_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(imx8mm_yes_ranges),
};
static const struct imx_pgc_domain_data imx8mm_pgc_domain_data = {
.domains = imx8mm_pgc_domains,
.domains_num = ARRAY_SIZE(imx8mm_pgc_domains),
.reg_access_table = &imx8mm_access_table,
};
static const struct imx_pgc_domain imx8mn_pgc_domains[] = {
[IMX8MN_POWER_DOMAIN_HSIOMIX] = {
.genpd = {
.name = "hsiomix",
},
.bits = {
.pxx = 0, /* no power sequence control */
.map = 0, /* no power sequence control */
.hskreq = IMX8MN_HSIO_HSK_PWRDNREQN,
.hskack = IMX8MN_HSIO_HSK_PWRDNACKN,
},
.keep_clocks = true,
},
[IMX8MN_POWER_DOMAIN_OTG1] = {
.genpd = {
.name = "usb-otg1",
},
.bits = {
.pxx = IMX8MN_OTG1_SW_Pxx_REQ,
.map = IMX8MN_OTG1_A53_DOMAIN,
},
.pgc = BIT(IMX8MN_PGC_OTG1),
},
[IMX8MN_POWER_DOMAIN_GPUMIX] = {
.genpd = {
.name = "gpumix",
},
.bits = {
.pxx = IMX8MN_GPUMIX_SW_Pxx_REQ,
.map = IMX8MN_GPUMIX_A53_DOMAIN,
.hskreq = IMX8MN_GPUMIX_HSK_PWRDNREQN,
.hskack = IMX8MN_GPUMIX_HSK_PWRDNACKN,
},
.pgc = BIT(IMX8MN_PGC_GPUMIX),
},
};
static const struct regmap_range imx8mn_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
GPC_PU_PWRHSK),
regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_MIPI),
GPC_PGC_SR(IMX8MN_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_OTG1),
GPC_PGC_SR(IMX8MN_PGC_OTG1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_DDR1),
GPC_PGC_SR(IMX8MN_PGC_DDR1)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_GPUMIX),
GPC_PGC_SR(IMX8MN_PGC_GPUMIX)),
regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_DISPMIX),
GPC_PGC_SR(IMX8MN_PGC_DISPMIX)),
};
static const struct regmap_access_table imx8mn_access_table = {
.yes_ranges = imx8mn_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(imx8mn_yes_ranges),
};
static const struct imx_pgc_domain_data imx8mn_pgc_domain_data = {
.domains = imx8mn_pgc_domains,
.domains_num = ARRAY_SIZE(imx8mn_pgc_domains),
.reg_access_table = &imx8mn_access_table,
};
static int imx_pgc_domain_probe(struct platform_device *pdev)
{
struct imx_pgc_domain *domain = pdev->dev.platform_data;
int ret;
domain->dev = &pdev->dev;
domain->regulator = devm_regulator_get_optional(domain->dev, "power");
if (IS_ERR(domain->regulator)) {
if (PTR_ERR(domain->regulator) != -ENODEV)
return dev_err_probe(domain->dev, PTR_ERR(domain->regulator),
"Failed to get domain's regulator\n");
} else if (domain->voltage) {
regulator_set_voltage(domain->regulator,
domain->voltage, domain->voltage);
}
domain->num_clks = devm_clk_bulk_get_all(domain->dev, &domain->clks);
if (domain->num_clks < 0)
return dev_err_probe(domain->dev, domain->num_clks,
"Failed to get domain's clocks\n");
domain->reset = devm_reset_control_array_get_optional_exclusive(domain->dev);
if (IS_ERR(domain->reset))
return dev_err_probe(domain->dev, PTR_ERR(domain->reset),
"Failed to get domain's resets\n");
pm_runtime_enable(domain->dev);
if (domain->bits.map)
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, domain->bits.map);
ret = pm_genpd_init(&domain->genpd, NULL, true);
if (ret) {
dev_err(domain->dev, "Failed to init power domain\n");
goto out_domain_unmap;
}
if (IS_ENABLED(CONFIG_LOCKDEP) &&
of_property_read_bool(domain->dev->of_node, "power-domains"))
lockdep_set_subclass(&domain->genpd.mlock, 1);
ret = of_genpd_add_provider_simple(domain->dev->of_node,
&domain->genpd);
if (ret) {
dev_err(domain->dev, "Failed to add genpd provider\n");
goto out_genpd_remove;
}
return 0;
out_genpd_remove:
pm_genpd_remove(&domain->genpd);
out_domain_unmap:
if (domain->bits.map)
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, 0);
pm_runtime_disable(domain->dev);
return ret;
}
static int imx_pgc_domain_remove(struct platform_device *pdev)
{
struct imx_pgc_domain *domain = pdev->dev.platform_data;
of_genpd_del_provider(domain->dev->of_node);
pm_genpd_remove(&domain->genpd);
if (domain->bits.map)
regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
domain->bits.map, 0);
pm_runtime_disable(domain->dev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int imx_pgc_domain_suspend(struct device *dev)
{
int ret;
/*
* This may look strange, but is done so the generic PM_SLEEP code
* can power down our domain and more importantly power it up again
* after resume, without tripping over our usage of runtime PM to
* power up/down the nested domains.
*/
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
pm_runtime_put_noidle(dev);
return ret;
}
return 0;
}
static int imx_pgc_domain_resume(struct device *dev)
{
return pm_runtime_put(dev);
}
#endif
static const struct dev_pm_ops imx_pgc_domain_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(imx_pgc_domain_suspend, imx_pgc_domain_resume)
};
static const struct platform_device_id imx_pgc_domain_id[] = {
{ "imx-pgc-domain", },
{ },
};
static struct platform_driver imx_pgc_domain_driver = {
.driver = {
.name = "imx-pgc",
.pm = &imx_pgc_domain_pm_ops,
},
.probe = imx_pgc_domain_probe,
.remove = imx_pgc_domain_remove,
.id_table = imx_pgc_domain_id,
};
builtin_platform_driver(imx_pgc_domain_driver)
static int imx_gpcv2_probe(struct platform_device *pdev)
{
const struct imx_pgc_domain_data *domain_data =
of_device_get_match_data(&pdev->dev);
struct regmap_config regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.rd_table = domain_data->reg_access_table,
.wr_table = domain_data->reg_access_table,
.max_register = SZ_4K,
};
struct device *dev = &pdev->dev;
struct device_node *pgc_np, *np;
struct regmap *regmap;
void __iomem *base;
int ret;
pgc_np = of_get_child_by_name(dev->of_node, "pgc");
if (!pgc_np) {
dev_err(dev, "No power domains specified in DT\n");
return -EINVAL;
}
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);
regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(dev, "failed to init regmap (%d)\n", ret);
return ret;
}
for_each_child_of_node(pgc_np, np) {
struct platform_device *pd_pdev;
struct imx_pgc_domain *domain;
u32 domain_index;
if (!of_device_is_available(np))
continue;
ret = of_property_read_u32(np, "reg", &domain_index);
if (ret) {
dev_err(dev, "Failed to read 'reg' property\n");
of_node_put(np);
return ret;
}
if (domain_index >= domain_data->domains_num) {
dev_warn(dev,
"Domain index %d is out of bounds\n",
domain_index);
continue;
}
pd_pdev = platform_device_alloc("imx-pgc-domain",
domain_index);
if (!pd_pdev) {
dev_err(dev, "Failed to allocate platform device\n");
of_node_put(np);
return -ENOMEM;
}
ret = platform_device_add_data(pd_pdev,
&domain_data->domains[domain_index],
sizeof(domain_data->domains[domain_index]));
if (ret) {
platform_device_put(pd_pdev);
of_node_put(np);
return ret;
}
domain = pd_pdev->dev.platform_data;
domain->regmap = regmap;
domain->genpd.power_on = imx_pgc_power_up;
domain->genpd.power_off = imx_pgc_power_down;
pd_pdev->dev.parent = dev;
pd_pdev->dev.of_node = np;
ret = platform_device_add(pd_pdev);
if (ret) {
platform_device_put(pd_pdev);
of_node_put(np);
return ret;
}
}
return 0;
}
static const struct of_device_id imx_gpcv2_dt_ids[] = {
{ .compatible = "fsl,imx7d-gpc", .data = &imx7_pgc_domain_data, },
{ .compatible = "fsl,imx8mm-gpc", .data = &imx8mm_pgc_domain_data, },
{ .compatible = "fsl,imx8mn-gpc", .data = &imx8mn_pgc_domain_data, },
{ .compatible = "fsl,imx8mq-gpc", .data = &imx8m_pgc_domain_data, },
{ }
};
static struct platform_driver imx_gpc_driver = {
.driver = {
.name = "imx-gpcv2",
.of_match_table = imx_gpcv2_dt_ids,
},
.probe = imx_gpcv2_probe,
};
builtin_platform_driver(imx_gpc_driver)
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