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soc/tegra: pmc: Consolidate Tegra186 support 

Move Tegra186 support to the consolidated PMC driver to reduce some of
the duplication and also gain I/O pad functionality on the new SoC as a
side-effect.

Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2017-08-30 12:42:34 +02:00
parent 5be2255676
commit c641ec6eab
5 changed files with 143 additions and 175 deletions
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5
drivers/soc/tegra/Kconfig
View File

@ -95,7 +95,7 @@ config ARCH_TEGRA_186_SOC
select TEGRA_BPMP
select TEGRA_HSP_MBOX
select TEGRA_IVC
select SOC_TEGRA_PMC_TEGRA186
select SOC_TEGRA_PMC
help
Enable support for the NVIDIA Tegar186 SoC. The Tegra186 features a
combination of Denver and Cortex-A57 CPU cores and a GPU based on
@ -118,9 +118,6 @@ config SOC_TEGRA_FLOWCTRL
config SOC_TEGRA_PMC
bool
config SOC_TEGRA_PMC_TEGRA186
bool
config SOC_TEGRA_POWERGATE_BPMP
def_bool y
depends on PM_GENERIC_DOMAINS

1
drivers/soc/tegra/Makefile
View File

@ -4,5 +4,4 @@ obj-y += fuse/
obj-y += common.o
obj-$(CONFIG_SOC_TEGRA_FLOWCTRL) += flowctrl.o
obj-$(CONFIG_SOC_TEGRA_PMC) += pmc.o
obj-$(CONFIG_SOC_TEGRA_PMC_TEGRA186) += pmc-tegra186.o
obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP) += powergate-bpmp.o

169
drivers/soc/tegra/pmc-tegra186.c
View File

@ -1,169 +0,0 @@
/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#define pr_fmt(fmt) "tegra-pmc: " fmt
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <asm/system_misc.h>
#define PMC_CNTRL 0x000
#define PMC_CNTRL_MAIN_RST BIT(4)
#define PMC_RST_STATUS 0x070
#define WAKE_AOWAKE_CTRL 0x4f4
#define WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0)
#define SCRATCH_SCRATCH0 0x2000
#define SCRATCH_SCRATCH0_MODE_RECOVERY BIT(31)
#define SCRATCH_SCRATCH0_MODE_BOOTLOADER BIT(30)
#define SCRATCH_SCRATCH0_MODE_RCM BIT(1)
#define SCRATCH_SCRATCH0_MODE_MASK (SCRATCH_SCRATCH0_MODE_RECOVERY | \
SCRATCH_SCRATCH0_MODE_BOOTLOADER | \
SCRATCH_SCRATCH0_MODE_RCM)
struct tegra_pmc {
struct device *dev;
void __iomem *regs;
void __iomem *wake;
void __iomem *aotag;
void __iomem *scratch;
void (*system_restart)(enum reboot_mode mode, const char *cmd);
struct notifier_block restart;
};
static int tegra186_pmc_restart_notify(struct notifier_block *nb,
unsigned long action,
void *data)
{
struct tegra_pmc *pmc = container_of(nb, struct tegra_pmc, restart);
const char *cmd = data;
u32 value;
value = readl(pmc->scratch + SCRATCH_SCRATCH0);
value &= ~SCRATCH_SCRATCH0_MODE_MASK;
if (cmd) {
if (strcmp(cmd, "recovery") == 0)
value |= SCRATCH_SCRATCH0_MODE_RECOVERY;
if (strcmp(cmd, "bootloader") == 0)
value |= SCRATCH_SCRATCH0_MODE_BOOTLOADER;
if (strcmp(cmd, "forced-recovery") == 0)
value |= SCRATCH_SCRATCH0_MODE_RCM;
}
writel(value, pmc->scratch + SCRATCH_SCRATCH0);
/*
* If available, call the system restart implementation that was
* registered earlier (typically PSCI).
*/
if (pmc->system_restart) {
pmc->system_restart(reboot_mode, cmd);
return NOTIFY_DONE;
}
/* reset everything but SCRATCH0_SCRATCH0 and PMC_RST_STATUS */
value = readl(pmc->regs + PMC_CNTRL);
value |= PMC_CNTRL_MAIN_RST;
writel(value, pmc->regs + PMC_CNTRL);
return NOTIFY_DONE;
}
static int tegra186_pmc_setup(struct tegra_pmc *pmc)
{
struct device_node *np = pmc->dev->of_node;
bool invert;
u32 value;
invert = of_property_read_bool(np, "nvidia,invert-interrupt");
value = readl(pmc->wake + WAKE_AOWAKE_CTRL);
if (invert)
value |= WAKE_AOWAKE_CTRL_INTR_POLARITY;
else
value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY;
writel(value, pmc->wake + WAKE_AOWAKE_CTRL);
/*
* We need to hook any system restart implementation registered
* previously so we can write SCRATCH_SCRATCH0 before reset.
*/
pmc->system_restart = arm_pm_restart;
arm_pm_restart = NULL;
pmc->restart.notifier_call = tegra186_pmc_restart_notify;
pmc->restart.priority = 128;
return register_restart_handler(&pmc->restart);
}
static int tegra186_pmc_probe(struct platform_device *pdev)
{
struct tegra_pmc *pmc;
struct resource *res;
pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL);
if (!pmc)
return -ENOMEM;
pmc->dev = &pdev->dev;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmc");
pmc->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->regs))
return PTR_ERR(pmc->regs);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake");
pmc->wake = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->wake))
return PTR_ERR(pmc->wake);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag");
pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->aotag))
return PTR_ERR(pmc->aotag);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch");
pmc->scratch = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->scratch))
return PTR_ERR(pmc->scratch);
return tegra186_pmc_setup(pmc);
}
static const struct of_device_id tegra186_pmc_of_match[] = {
{ .compatible = "nvidia,tegra186-pmc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tegra186_pmc_of_match);
static struct platform_driver tegra186_pmc_driver = {
.driver = {
.name = "tegra186-pmc",
.of_match_table = tegra186_pmc_of_match,
},
.probe = tegra186_pmc_probe,
};
builtin_platform_driver(tegra186_pmc_driver);

131
drivers/soc/tegra/pmc.c
View File

@ -117,6 +117,10 @@
#define GPU_RG_CNTRL 0x2d4
/* Tegra186 and later */
#define WAKE_AOWAKE_CTRL 0x4f4
#define WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0)
struct tegra_powergate {
struct generic_pm_domain genpd;
struct tegra_pmc *pmc;
@ -186,6 +190,8 @@ struct tegra_pmc_soc {
struct tegra_pmc {
struct device *dev;
void __iomem *base;
void __iomem *wake;
void __iomem *aotag;
void __iomem *scratch;
struct clk *clk;
struct dentry *debugfs;
@ -1408,7 +1414,32 @@ static int tegra_pmc_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
pmc->scratch = base;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake");
if (res) {
pmc->wake = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->wake))
return PTR_ERR(pmc->wake);
} else {
pmc->wake = base;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag");
if (res) {
pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->aotag))
return PTR_ERR(pmc->aotag);
} else {
pmc->aotag = base;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch");
if (res) {
pmc->scratch = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pmc->scratch))
return PTR_ERR(pmc->scratch);
} else {
pmc->scratch = base;
}
pmc->clk = devm_clk_get(&pdev->dev, "pclk");
if (IS_ERR(pmc->clk)) {
@ -1791,7 +1822,105 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = {
.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
};
static const struct tegra_io_pad_soc tegra186_io_pads[] = {
{ .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_PEX_CLK_BIAS, .dpd = 4, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_PEX_CLK3, .dpd = 5, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 7, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DBG, .dpd = 25, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_HDMI_DP0, .dpd = 28, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_HDMI_DP1, .dpd = 29, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = 32, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_SDMMC2_HV, .dpd = 34, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_SDMMC4, .dpd = 36, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CAM, .dpd = 38, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DSIB, .dpd = 40, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DSIC, .dpd = 41, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DSID, .dpd = 42, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CSIC, .dpd = 43, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CSID, .dpd = 44, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CSIE, .dpd = 45, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CSIF, .dpd = 46, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_SPI, .dpd = 47, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_UFS, .dpd = 49, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_DMIC_HV, .dpd = 52, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_EDP, .dpd = 53, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_SDMMC1_HV, .dpd = 55, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_SDMMC3_HV, .dpd = 56, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_CONN, .dpd = 60, .voltage = UINT_MAX },
{ .id = TEGRA_IO_PAD_AUDIO_HV, .dpd = 61, .voltage = UINT_MAX },
};
static const struct tegra_pmc_regs tegra186_pmc_regs = {
.scratch0 = 0x2000,
.dpd_req = 0x74,
.dpd_status = 0x78,
.dpd2_req = 0x7c,
.dpd2_status = 0x80,
};
static void tegra186_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
struct device_node *np,
bool invert)
{
struct resource regs;
void __iomem *wake;
u32 value;
int index;
index = of_property_match_string(np, "reg-names", "wake");
if (index < 0) {
pr_err("failed to find PMC wake registers\n");
return;
}
of_address_to_resource(np, index, &regs);
wake = ioremap_nocache(regs.start, resource_size(&regs));
if (!wake) {
pr_err("failed to map PMC wake registers\n");
return;
}
value = readl(wake + WAKE_AOWAKE_CTRL);
if (invert)
value |= WAKE_AOWAKE_CTRL_INTR_POLARITY;
else
value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY;
writel(value, wake + WAKE_AOWAKE_CTRL);
iounmap(wake);
}
static const struct tegra_pmc_soc tegra186_pmc_soc = {
.num_powergates = 0,
.powergates = NULL,
.num_cpu_powergates = 0,
.cpu_powergates = NULL,
.has_tsense_reset = false,
.has_gpu_clamps = false,
.num_io_pads = ARRAY_SIZE(tegra186_io_pads),
.io_pads = tegra186_io_pads,
.regs = &tegra186_pmc_regs,
.init = NULL,
.setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
};
static const struct of_device_id tegra_pmc_match[] = {
{ .compatible = "nvidia,tegra186-pmc", .data = &tegra186_pmc_soc },
{ .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
{ .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
{ .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },

12
include/soc/tegra/pmc.h
View File

@ -83,6 +83,7 @@ enum tegra_io_pad {
TEGRA_IO_PAD_BB,
TEGRA_IO_PAD_CAM,
TEGRA_IO_PAD_COMP,
TEGRA_IO_PAD_CONN,
TEGRA_IO_PAD_CSIA,
TEGRA_IO_PAD_CSIB,
TEGRA_IO_PAD_CSIC,
@ -92,31 +93,42 @@ enum tegra_io_pad {
TEGRA_IO_PAD_DBG,
TEGRA_IO_PAD_DEBUG_NONAO,
TEGRA_IO_PAD_DMIC,
TEGRA_IO_PAD_DMIC_HV,
TEGRA_IO_PAD_DP,
TEGRA_IO_PAD_DSI,
TEGRA_IO_PAD_DSIB,
TEGRA_IO_PAD_DSIC,
TEGRA_IO_PAD_DSID,
TEGRA_IO_PAD_EDP,
TEGRA_IO_PAD_EMMC,
TEGRA_IO_PAD_EMMC2,
TEGRA_IO_PAD_GPIO,
TEGRA_IO_PAD_HDMI,
TEGRA_IO_PAD_HDMI_DP0,
TEGRA_IO_PAD_HDMI_DP1,
TEGRA_IO_PAD_HSIC,
TEGRA_IO_PAD_HV,
TEGRA_IO_PAD_LVDS,
TEGRA_IO_PAD_MIPI_BIAS,
TEGRA_IO_PAD_NAND,
TEGRA_IO_PAD_PEX_BIAS,
TEGRA_IO_PAD_PEX_CLK_BIAS,
TEGRA_IO_PAD_PEX_CLK1,
TEGRA_IO_PAD_PEX_CLK2,
TEGRA_IO_PAD_PEX_CLK3,
TEGRA_IO_PAD_PEX_CNTRL,
TEGRA_IO_PAD_SDMMC1,
TEGRA_IO_PAD_SDMMC1_HV,
TEGRA_IO_PAD_SDMMC2,
TEGRA_IO_PAD_SDMMC2_HV,
TEGRA_IO_PAD_SDMMC3,
TEGRA_IO_PAD_SDMMC3_HV,
TEGRA_IO_PAD_SDMMC4,
TEGRA_IO_PAD_SPI,
TEGRA_IO_PAD_SPI_HV,
TEGRA_IO_PAD_SYS_DDC,
TEGRA_IO_PAD_UART,
TEGRA_IO_PAD_UFS,
TEGRA_IO_PAD_USB0,
TEGRA_IO_PAD_USB1,
TEGRA_IO_PAD_USB2,