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Message-ID: <20200121182637.GD32742@smile.fi.intel.com>
Date: Tue, 21 Jan 2020 20:26:37 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: Darren Hart <dvhart@...radead.org>,
Lee Jones <lee.jones@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
"H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Zha Qipeng <qipeng.zha@...el.com>,
"David E . Box" <david.e.box@...ux.intel.com>,
Guenter Roeck <linux@...ck-us.net>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Mark Brown <broonie@...nel.org>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 37/38] platform/x86: intel_pmc_ipc: Convert to MFD
On Tue, Jan 21, 2020 at 07:01:13PM +0300, Mika Westerberg wrote:
> This driver only creates a bunch of platform devices sharing resources
> belonging to the PMC device. This is pretty much what MFD subsystem is
> for so move the driver there, renaming it to intel_pmc_bxt.c which
> should be more clear what it is.
>
> MFD subsystem provides nice helper APIs for subdevice creation so
> convert the driver to use those. Unfortunately the ACPI device includes
> separate resources for most of the subdevices so we cannot simply call
> mfd_add_devices() to create all of them but instead we need to call it
> separately for each device.
>
> The new MFD driver continues to expose two sysfs attributes that allow
> userspace to send IPC commands to the PMC/SCU to avoid breaking any
> existing applications that may use these. Generally this is bad idea so
> document this in the ABI documentation.
Thanks for an update!
My comments below.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
> .../ABI/obsolete/sysfs-driver-intel_pmc_bxt | 22 +
> arch/x86/include/asm/intel_pmc_ipc.h | 47 --
> arch/x86/include/asm/intel_telemetry.h | 1 +
> drivers/mfd/Kconfig | 16 +-
> drivers/mfd/Makefile | 1 +
> drivers/mfd/intel_pmc_bxt.c | 496 ++++++++++++++
> drivers/platform/x86/Kconfig | 16 +-
> drivers/platform/x86/Makefile | 1 -
> drivers/platform/x86/intel_pmc_ipc.c | 645 ------------------
> .../platform/x86/intel_telemetry_debugfs.c | 12 +-
> drivers/platform/x86/intel_telemetry_pltdrv.c | 2 +
> drivers/usb/typec/tcpm/Kconfig | 2 +-
> include/linux/mfd/intel_pmc_bxt.h | 21 +
> 13 files changed, 572 insertions(+), 710 deletions(-)
> create mode 100644 Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt
> delete mode 100644 arch/x86/include/asm/intel_pmc_ipc.h
> create mode 100644 drivers/mfd/intel_pmc_bxt.c
> delete mode 100644 drivers/platform/x86/intel_pmc_ipc.c
> create mode 100644 include/linux/mfd/intel_pmc_bxt.h
>
> diff --git a/Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt b/Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt
> new file mode 100644
> index 000000000000..b298be32d426
> --- /dev/null
> +++ b/Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt
> @@ -0,0 +1,22 @@
> +These files allow sending arbitrary IPC commands to the PMC/SCU which
> +may be dangerous. These will be removed eventually and should not be
> +used in any new applications.
> +
> +What: /sys/bus/platform/devices/INT34D2:00/simplecmd
> +Date: Jun 2015
> +KernelVersion: 4.1
> +Contact: Mika Westerberg <mika.westerberg@...ux.intel.com>
> +Description: This interface allows userspace to send an arbitrary
> + IPC command to the PMC/SCU.
> +
> + Format: %d %d where first number is command and
> + second number is subcommand.
> +
> +What: /sys/bus/platform/devices/INT34D2:00/northpeak
> +Date: Jun 2015
> +KernelVersion: 4.1
> +Contact: Mika Westerberg <mika.westerberg@...ux.intel.com>
> +Description: This interface allows userspace to send an arbitrary
> + command to the Northpeak through the PMC/SCU.
> +
> + Format: %u.
> diff --git a/arch/x86/include/asm/intel_pmc_ipc.h b/arch/x86/include/asm/intel_pmc_ipc.h
> deleted file mode 100644
> index 22848df5faaf..000000000000
> --- a/arch/x86/include/asm/intel_pmc_ipc.h
> +++ /dev/null
> @@ -1,47 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -#ifndef _ASM_X86_INTEL_PMC_IPC_H_
> -#define _ASM_X86_INTEL_PMC_IPC_H_
> -
> -/* Commands */
> -#define PMC_IPC_USB_PWR_CTRL 0xF0
> -#define PMC_IPC_PMIC_BLACKLIST_SEL 0xEF
> -#define PMC_IPC_PHY_CONFIG 0xEE
> -#define PMC_IPC_NORTHPEAK_CTRL 0xED
> -#define PMC_IPC_PM_DEBUG 0xEC
> -#define PMC_IPC_PMC_FW_MSG_CTRL 0xEA
> -
> -/* IPC return code */
> -#define IPC_ERR_NONE 0
> -#define IPC_ERR_CMD_NOT_SUPPORTED 1
> -#define IPC_ERR_CMD_NOT_SERVICED 2
> -#define IPC_ERR_UNABLE_TO_SERVICE 3
> -#define IPC_ERR_CMD_INVALID 4
> -#define IPC_ERR_CMD_FAILED 5
> -#define IPC_ERR_EMSECURITY 6
> -#define IPC_ERR_UNSIGNEDKERNEL 7
> -
> -/* GCR reg offsets from gcr base*/
> -#define PMC_GCR_PMC_CFG_REG 0x08
> -#define PMC_GCR_TELEM_DEEP_S0IX_REG 0x78
> -#define PMC_GCR_TELEM_SHLW_S0IX_REG 0x80
> -
> -#if IS_ENABLED(CONFIG_INTEL_PMC_IPC)
> -
> -int intel_pmc_s0ix_counter_read(u64 *data);
> -int intel_pmc_gcr_read64(u32 offset, u64 *data);
> -
> -#else
> -
> -static inline int intel_pmc_s0ix_counter_read(u64 *data)
> -{
> - return -EINVAL;
> -}
> -
> -static inline int intel_pmc_gcr_read64(u32 offset, u64 *data)
> -{
> - return -EINVAL;
> -}
> -
> -#endif /*CONFIG_INTEL_PMC_IPC*/
> -
> -#endif
> diff --git a/arch/x86/include/asm/intel_telemetry.h b/arch/x86/include/asm/intel_telemetry.h
> index 1335565c43b5..8c973f9aa20f 100644
> --- a/arch/x86/include/asm/intel_telemetry.h
> +++ b/arch/x86/include/asm/intel_telemetry.h
> @@ -56,6 +56,7 @@ struct telemetry_plt_config {
> struct telemetry_unit_config ioss_config;
> struct mutex telem_trace_lock;
> struct mutex telem_lock;
> + struct intel_pmc_dev *pmc;
> struct intel_scu_ipc_dev *scu;
> bool telem_in_use;
> };
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 59515142438e..1ab71b3aa6ef 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -551,7 +551,7 @@ config INTEL_SOC_PMIC
>
> config INTEL_SOC_PMIC_BXTWC
> tristate "Support for Intel Broxton Whiskey Cove PMIC"
> - depends on INTEL_PMC_IPC
> + depends on MFD_INTEL_PMC_BXT
> select MFD_CORE
> select REGMAP_IRQ
> help
> @@ -632,6 +632,20 @@ config MFD_INTEL_MSIC
> Passage) chip. This chip embeds audio, battery, GPIO, etc.
> devices used in Intel Medfield platforms.
>
> +config MFD_INTEL_PMC_BXT
> + tristate "Intel PMC Driver for Broxton"
> + depends on X86
> + depends on X86_PLATFORM_DEVICES
> + depends on ACPI
> + select INTEL_SCU_IPC
> + select MFD_CORE
> + help
> + This driver provides support for the PMC (Power Management
> + Controller) on Intel Broxton and Apollo Lake. The PMC is a
> + multi-function device that exposes IPC, General Control
> + Register and P-unit access. In addition this creates devices
> + for iTCO watchdog and telemetry that are part of the PMC.
> +
> config MFD_IPAQ_MICRO
> bool "Atmel Micro ASIC (iPAQ h3100/h3600/h3700) Support"
> depends on SA1100_H3100 || SA1100_H3600
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index aed99f08739f..34563a6a047b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -211,6 +211,7 @@ obj-$(CONFIG_MFD_INTEL_LPSS) += intel-lpss.o
> obj-$(CONFIG_MFD_INTEL_LPSS_PCI) += intel-lpss-pci.o
> obj-$(CONFIG_MFD_INTEL_LPSS_ACPI) += intel-lpss-acpi.o
> obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
> +obj-$(CONFIG_MFD_INTEL_PMC_BXT) += intel_pmc_bxt.o
> obj-$(CONFIG_MFD_PALMAS) += palmas.o
> obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
> obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
> diff --git a/drivers/mfd/intel_pmc_bxt.c b/drivers/mfd/intel_pmc_bxt.c
> new file mode 100644
> index 000000000000..f5bb8b159459
> --- /dev/null
> +++ b/drivers/mfd/intel_pmc_bxt.c
> @@ -0,0 +1,496 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for the Intel Broxton PMC
> + *
> + * (C) Copyright 2014 - 2020 Intel Corporation
> + *
> + * This driver is based on Intel SCU IPC driver(intel_scu_ipc.c) by
Perhaps space before (.
> + * Sreedhara DS <sreedhara.ds@...el.com>
> + *
> + * The PMC running on the ARC processor communicates with another entity
> + * running in the IA core through an IPC mechanism which in turn sends
> + * messages between the IA and the PMC.
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/delay.h>
> +#include <linux/errno.h>
> +#include <linux/interrupt.h>
> +#include <linux/io-64-nonatomic-lo-hi.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/intel_pmc_bxt.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/platform_data/itco_wdt.h>
Perhaps preserve alphabetical order?
> +
> +#include <asm/intel_scu_ipc.h>
> +
> +/* Residency with clock rate at 19.2MHz to usecs */
> +#define S0IX_RESIDENCY_IN_USECS(d, s) \
> +({ \
> + u64 result = 10ull * ((d) + (s)); \
> + do_div(result, 192); \
> + result; \
> +})
> +
> +/* Resources exported from IFWI */
> +#define PLAT_RESOURCE_IPC_INDEX 0
> +#define PLAT_RESOURCE_IPC_SIZE 0x1000
> +#define PLAT_RESOURCE_GCR_OFFSET 0x1000
> +#define PLAT_RESOURCE_GCR_SIZE 0x1000
> +#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
> +#define PLAT_RESOURCE_BIOS_IFACE_INDEX 2
> +#define PLAT_RESOURCE_TELEM_SSRAM_INDEX 3
> +#define PLAT_RESOURCE_ISP_DATA_INDEX 4
> +#define PLAT_RESOURCE_ISP_IFACE_INDEX 5
> +#define PLAT_RESOURCE_GTD_DATA_INDEX 6
> +#define PLAT_RESOURCE_GTD_IFACE_INDEX 7
> +#define PLAT_RESOURCE_ACPI_IO_INDEX 0
> +
> +/*
> + * BIOS does not create an ACPI device for each PMC function, but
> + * exports multiple resources from one ACPI device(IPC) for multiple
Space before ( ?
> + * functions. This driver is responsible for creating a child device and
> + * to export resources for those functions.
> + */
> +#define TCO_DEVICE_NAME "iTCO_wdt"
> +#define SMI_EN_OFFSET 0x40
> +#define SMI_EN_SIZE 4
> +#define TCO_BASE_OFFSET 0x60
> +#define TCO_REGS_SIZE 16
> +#define PUNIT_DEVICE_NAME "intel_punit_ipc"
> +#define TELEMETRY_DEVICE_NAME "intel_telemetry"
> +#define TELEM_SSRAM_SIZE 240
> +#define TELEM_PMC_SSRAM_OFFSET 0x1B00
> +#define TELEM_PUNIT_SSRAM_OFFSET 0x1A00
> +
> +/* Commands */
> +#define PMC_NORTHPEAK_CTRL 0xED
> +
> +/* PMC_CFG_REG bit masks */
> +#define PMC_CFG_NO_REBOOT_EN BIT(4)
> +
> +/* Index to cells array in below struct */
> +enum {
> + PMC_TCO,
> + PMC_PUNIT,
> + PMC_TELEM,
> +};
> +
> +struct intel_pmc_dev {
> + struct device *dev;
> + struct intel_scu_ipc_dev *scu;
> +
> + struct mfd_cell cells[PMC_TELEM + 1];
> +
> + void __iomem *gcr_mem_base;
> + spinlock_t gcr_lock;
> +
> + struct resource *telem_base;
> +};
> +
> +static inline bool is_gcr_valid(u32 offset)
> +{
> + return offset < PLAT_RESOURCE_GCR_SIZE;
> +}
> +
> +/**
> + * intel_pmc_gcr_read64() - Read a 64-bit PMC GCR register
> + * @pmc: PMC device pointer
> + * @offset: offset of GCR register from GCR address base
> + * @data: data pointer for storing the register output
> + *
> + * Reads the 64-bit PMC GCR register at given offset.
> + *
> + * Return: Negative value on error or 0 on success.
> + */
> +int intel_pmc_gcr_read64(struct intel_pmc_dev *pmc, u32 offset, u64 *data)
> +{
> + if (!is_gcr_valid(offset))
> + return -EINVAL;
> +
> + spin_lock(&pmc->gcr_lock);
> + *data = readq(pmc->gcr_mem_base + offset);
> + spin_unlock(&pmc->gcr_lock);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(intel_pmc_gcr_read64);
> +
> +/**
> + * intel_pmc_s0ix_counter_read() - Read S0ix residency.
> + * @pmc: PMC device pointer
> + * @data: Out param that contains current S0ix residency count.
> + *
> + * Writes to @data how many usecs the system has been in low-power S0ix
> + * state.
> + *
> + * Return: An error code or 0 on success.
> + */
> +int intel_pmc_s0ix_counter_read(struct intel_pmc_dev *pmc, u64 *data)
> +{
> + u64 deep, shlw;
> +
> + spin_lock(&pmc->gcr_lock);
> + deep = readq(pmc->gcr_mem_base + PMC_GCR_TELEM_DEEP_S0IX_REG);
> + shlw = readq(pmc->gcr_mem_base + PMC_GCR_TELEM_SHLW_S0IX_REG);
> + spin_unlock(&pmc->gcr_lock);
> +
> + *data = S0IX_RESIDENCY_IN_USECS(deep, shlw);
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(intel_pmc_s0ix_counter_read);
> +
> +/**
> + * intel_pmc_gcr_update() - Update PMC GCR register bits
I guess this function would be closer to _read64() one, since they are doing
similar stuff.
> + * @pmc: PMC device pointer
> + * @offset: offset of GCR register from GCR address base
> + * @mask: bit mask for update operation
> + * @val: update value
> + *
> + * Updates the bits of given GCR register as specified by
> + * @mask and @val.
> + *
> + * Return: Negative value on error or 0 on success.
> + */
> +static int intel_pmc_gcr_update(struct intel_pmc_dev *pmc, u32 offset, u32 mask,
> + u32 val)
> +{
> + u32 new_val;
> + int ret = 0;
> +
> + if (!is_gcr_valid(offset))
> + return -EINVAL;
> +
> + spin_lock(&pmc->gcr_lock);
> + new_val = readl(pmc->gcr_mem_base + offset);
> +
> + new_val &= ~mask;
> + new_val |= val & mask;
Perhaps standard pattern, i.e.
new_val = (new_val & ~mask) | (val & mask);
?
> +
> + writel(new_val, pmc->gcr_mem_base + offset);
> +
> + new_val = readl(pmc->gcr_mem_base + offset);
> +
> + /* check whether the bit update is successful */
> + if ((new_val & mask) != (val & mask))
> + ret = -EIO;
I'm not sure why this is under lock. All variables are local. If we move out
we may drop ret variable completely.
> +
> + spin_unlock(&pmc->gcr_lock);
> + return ret;
> +}
> +
> +static ssize_t intel_pmc_simple_cmd_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct intel_pmc_dev *pmc = dev_get_drvdata(dev);
> + struct intel_scu_ipc_dev *scu = pmc->scu;
> + int subcmd;
> + int cmd;
> + int ret;
> +
> + ret = sscanf(buf, "%d %d", &cmd, &subcmd);
> + if (ret != 2) {
> + dev_err(dev, "Invalid values, expected: cmd subcmd\n");
> + return -EINVAL;
> + }
> +
> + ret = intel_scu_ipc_dev_simple_command(scu, cmd, subcmd);
> + if (ret) {
> + dev_err(dev, "Command %d failed with %d\n", cmd, ret);
> + return ret;
> + }
> +
> + return count;
> +}
> +static DEVICE_ATTR(simplecmd, 0200, NULL, intel_pmc_simple_cmd_store);
> +
> +static ssize_t intel_pmc_northpeak_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct intel_pmc_dev *pmc = dev_get_drvdata(dev);
> + struct intel_scu_ipc_dev *scu = pmc->scu;
> + unsigned long val;
> + int subcmd;
> + int ret;
> +
> + ret = kstrtoul(buf, 0, &val);
> + if (ret)
> + return ret;
> +
> + if (val)
> + subcmd = 1;
> + else
> + subcmd = 0;
> +
> + ret = intel_scu_ipc_dev_simple_command(scu, PMC_NORTHPEAK_CTRL, subcmd);
> + if (ret) {
> + dev_err(dev, "Command north %d failed with %d\n", subcmd, ret);
> + return ret;
> + }
> +
> + return count;
> +}
> +static DEVICE_ATTR(northpeak, 0200, NULL, intel_pmc_northpeak_store);
> +
> +static struct attribute *intel_pmc_attrs[] = {
> + &dev_attr_northpeak.attr,
> + &dev_attr_simplecmd.attr,
> + NULL
> +};
> +
> +static const struct attribute_group intel_pmc_group = {
> + .attrs = intel_pmc_attrs,
> +};
> +
> +static const struct attribute_group *intel_pmc_groups[] = {
> + &intel_pmc_group,
> + NULL
> +};
> +
> +/* Templates used to construct MFD cells */
> +
> +static const struct mfd_cell punit = {
> + .name = PUNIT_DEVICE_NAME,
> +};
> +
> +static int update_no_reboot_bit(void *priv, bool set)
> +{
> + u32 value = set ? PMC_CFG_NO_REBOOT_EN : 0;
Perhaps
u32 bits = PMC_CFG_NO_REBOOT_EN;
u32 value = set ? bits : 0;
...
> + struct intel_pmc_dev *pmc = priv;
> +
> + return intel_pmc_gcr_update(pmc, PMC_GCR_PMC_CFG_REG,
> + PMC_CFG_NO_REBOOT_EN, value);
return intel_pmc_gcr_update(pmc, PMC_GCR_PMC_CFG_REG, bits, value);
?
> +}
> +
> +static const struct itco_wdt_platform_data tco_pdata = {
> + .name = "Apollo Lake SoC",
> + .version = 5,
> + .update_no_reboot_bit = update_no_reboot_bit,
> +};
> +
> +static const struct mfd_cell tco = {
> + .name = TCO_DEVICE_NAME,
> + .ignore_resource_conflicts = true,
> +};
> +
> +static const struct resource telem_res[] = {
> + DEFINE_RES_MEM(TELEM_PUNIT_SSRAM_OFFSET, TELEM_SSRAM_SIZE),
> + DEFINE_RES_MEM(TELEM_PMC_SSRAM_OFFSET, TELEM_SSRAM_SIZE),
> +};
> +
> +static const struct mfd_cell telem = {
> + .name = TELEMETRY_DEVICE_NAME,
> + .resources = telem_res,
> + .num_resources = ARRAY_SIZE(telem_res),
> +};
> +
> +static int intel_pmc_get_resources(struct platform_device *pdev,
> + struct intel_pmc_dev *pmc,
> + struct intel_scu_ipc_pdata *pdata)
> +{
> + struct resource *res, *punit_res;
> + struct resource gcr_res;
> + size_t npunit_res = 0;
> +
> + pdata->irq = platform_get_irq(pdev, 0);
Is this optional resource?
If yes, use _optional() version of API, otherwise error check should be added.
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_IPC_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get IPC resource\n");
> + return -EINVAL;
> + }
> +
> + /* IPC registers */
> + pdata->mem.flags = res->flags;
> + pdata->mem.start = res->start;
> + pdata->mem.end = res->start + PLAT_RESOURCE_IPC_SIZE - 1;
> +
> + /* GCR registers */
> + gcr_res.flags = res->flags;
> + gcr_res.start = res->start + PLAT_RESOURCE_GCR_OFFSET;
> + gcr_res.end = gcr_res.start + PLAT_RESOURCE_GCR_SIZE - 1;
> +
> + pmc->gcr_mem_base = devm_ioremap_resource(&pdev->dev, &gcr_res);
> + if (IS_ERR(pmc->gcr_mem_base))
> + return PTR_ERR(pmc->gcr_mem_base);
> +
> + pmc->cells[PMC_TCO] = tco;
> + pmc->cells[PMC_PUNIT] = punit;
> + pmc->cells[PMC_TELEM] = telem;
> +
> + /* iTCO watchdog only if there is no WDAT ACPI table */
> + if (!acpi_has_watchdog()) {
> + struct itco_wdt_platform_data *pdata;
> + struct resource *tco_res;
> +
> + res = platform_get_resource(pdev, IORESOURCE_IO,
> + PLAT_RESOURCE_ACPI_IO_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get IO resource\n");
> + return -EINVAL;
> + }
> +
> + tco_res = devm_kcalloc(&pdev->dev, 2, sizeof(tco_res[0]),
> + GFP_KERNEL);
Hmm... Perhaps sizeof(*tco_res) ?
> + if (!tco_res)
> + return -ENOMEM;
> +
> + tco_res[0].flags = IORESOURCE_IO;
> + tco_res[0].start = res->start + TCO_BASE_OFFSET;
> + tco_res[0].end = tco_res[0].start + TCO_REGS_SIZE - 1;
> + tco_res[1].flags = IORESOURCE_IO;
> + tco_res[1].start = res->start + SMI_EN_OFFSET;
> + tco_res[1].end = tco_res[1].start + SMI_EN_SIZE - 1;
> +
> + pmc->cells[PMC_TCO].resources = tco_res;
> + pmc->cells[PMC_TCO].num_resources = 2;
> +
> + pdata = devm_kmemdup(&pdev->dev, &tco_pdata, sizeof(tco_pdata),
> + GFP_KERNEL);
sizeof(*pdata) ?
> + if (!pdata)
> + return -ENOMEM;
> +
> + pdata->no_reboot_priv = pmc;
> +
> + pmc->cells[PMC_TCO].platform_data = pdata;
> + pmc->cells[PMC_TCO].pdata_size = sizeof(*pdata);
Can it be (this condition body) rather helper?
> + }
> +
> + punit_res = devm_kcalloc(&pdev->dev, 6, sizeof(punit_res[0]), GFP_KERNEL);
sizeof(*punit_res) ?
> + if (!punit_res)
> + return -ENOMEM;
> +
> + /* This is index 0 to cover BIOS data register */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_BIOS_DATA_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of P-unit BIOS data\n");
> + return -EINVAL;
> + }
> + punit_res[npunit_res++] = *res;
> +
> + /* This is index 1 to cover BIOS interface register */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_BIOS_IFACE_INDEX);
> + if (!res) {
> + dev_err(&pdev->dev, "Failed to get res of P-unit BIOS iface\n");
> + return -EINVAL;
> + }
> + punit_res[npunit_res++] = *res;
> +
> + /* This is index 2 to cover ISP data register, optional */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_ISP_DATA_INDEX);
> + if (res)
> + punit_res[npunit_res++] = *res;
> +
> + /* This is index 3 to cover ISP interface register, optional */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_ISP_IFACE_INDEX);
> + if (res)
> + punit_res[npunit_res++] = *res;
> +
> + /* This is index 4 to cover GTD data register, optional */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_GTD_DATA_INDEX);
> + if (res)
> + punit_res[npunit_res++] = *res;
> +
> + /* This is index 5 to cover GTD interface register, optional */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_GTD_IFACE_INDEX);
> + if (res)
> + punit_res[npunit_res++] = *res;
> +
> + pmc->cells[PMC_PUNIT].resources = punit_res;
> + pmc->cells[PMC_PUNIT].num_resources = npunit_res;
> +
> + /* Telemetry SSRAM is optional */
> + res = platform_get_resource(pdev, IORESOURCE_MEM,
> + PLAT_RESOURCE_TELEM_SSRAM_INDEX);
> + if (res)
> + pmc->telem_base = res;
> +
> + return 0;
> +}
> +
> +static int intel_pmc_create_devices(struct intel_pmc_dev *pmc)
> +{
> + int ret;
> +
> + if (pmc->cells[PMC_TCO].num_resources) {
> + ret = devm_mfd_add_devices(pmc->dev, PLATFORM_DEVID_AUTO,
> + &pmc->cells[PMC_TCO], 1, NULL, 0, NULL);
> + if (ret)
> + return ret;
> + }
> +
> + ret = devm_mfd_add_devices(pmc->dev, PLATFORM_DEVID_AUTO,
> + &pmc->cells[PMC_PUNIT], 1, NULL, 0, NULL);
> + if (ret)
> + return ret;
> +
> + if (!pmc->telem_base)
> + return 0;
> +
> + return devm_mfd_add_devices(pmc->dev, PLATFORM_DEVID_AUTO,
> + &pmc->cells[PMC_TELEM], 1,
> + pmc->telem_base, 0, NULL);
> +}
> +
> +static const struct acpi_device_id intel_pmc_acpi_ids[] = {
> + { "INT34D2" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(acpi, intel_pmc_acpi_ids);
> +
> +static int intel_pmc_probe(struct platform_device *pdev)
> +{
> + struct intel_scu_ipc_pdata pdata = {};
> + struct intel_pmc_dev *pmc;
> + int ret;
> +
> + pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL);
> + if (!pmc)
> + return -ENOMEM;
> +
> + pmc->dev = &pdev->dev;
> + spin_lock_init(&pmc->gcr_lock);
> +
> + ret = intel_pmc_get_resources(pdev, pmc, &pdata);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to request resources\n");
> + return ret;
> + }
> +
> + pmc->scu = devm_intel_scu_ipc_register(&pdev->dev, &pdata);
> + if (IS_ERR(pmc->scu))
> + return PTR_ERR(pmc->scu);
> +
> + platform_set_drvdata(pdev, pmc);
> +
> + ret = intel_pmc_create_devices(pmc);
> + if (ret)
> + dev_err(&pdev->dev, "Failed to create PMC devices\n");
> +
> + return ret;
> +}
> +
> +static struct platform_driver intel_pmc_driver = {
> + .probe = intel_pmc_probe,
> + .driver = {
> + .name = "intel_pmc_bxt",
> + .acpi_match_table = intel_pmc_acpi_ids,
> + .dev_groups = intel_pmc_groups,
> + },
> +};
> +
> +module_platform_driver(intel_pmc_driver);
> +
> +MODULE_AUTHOR("Zha Qipeng <qipeng.zha@...el.com>");
> +MODULE_DESCRIPTION("Intel Broxton PMC driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index cd8472e9d8ec..58792c1dc290 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -1195,19 +1195,11 @@ config INTEL_SMARTCONNECT
> This driver checks to determine whether the device has Intel Smart
> Connect enabled, and if so disables it.
>
> -config INTEL_PMC_IPC
> - tristate "Intel PMC IPC Driver"
> - depends on ACPI
> - select INTEL_SCU_IPC
> - ---help---
> - This driver provides support for PMC control on some Intel platforms.
> - The PMC is an ARC processor which defines IPC commands for communication
> - with other entities in the CPU.
> -
> config INTEL_BXTWC_PMIC_TMU
> tristate "Intel BXT Whiskey Cove TMU Driver"
> depends on REGMAP
> - depends on INTEL_SOC_PMIC_BXTWC && INTEL_PMC_IPC
> + depends on MFD_INTEL_PMC_BXT
> + depends on INTEL_SOC_PMIC_BXTWC
> ---help---
> Select this driver to use Intel BXT Whiskey Cove PMIC TMU feature.
> This driver enables the alarm wakeup functionality in the TMU unit
> @@ -1233,7 +1225,9 @@ config INTEL_PUNIT_IPC
>
> config INTEL_TELEMETRY
> tristate "Intel SoC Telemetry Driver"
> - depends on INTEL_PMC_IPC && INTEL_PUNIT_IPC && X86_64
> + depends on X86_64
> + depends on MFD_INTEL_PMC_BXT
> + depends on INTEL_PUNIT_IPC
> ---help---
> This driver provides interfaces to configure and use
> telemetry for INTEL SoC from APL onwards. It is also
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index c7a42feaa521..f1abce3e1720 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -86,7 +86,6 @@ obj-$(CONFIG_INTEL_RST) += intel-rst.o
> obj-$(CONFIG_INTEL_SMARTCONNECT) += intel-smartconnect.o
>
> obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
> -obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
> obj-$(CONFIG_TOUCHSCREEN_DMI) += touchscreen_dmi.o
> obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
> obj-$(CONFIG_SURFACE_3_BUTTON) += surface3_button.o
> diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
> deleted file mode 100644
> index c006609ef74b..000000000000
> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ /dev/null
> @@ -1,645 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -/*
> - * Driver for the Intel PMC IPC mechanism
> - *
> - * (C) Copyright 2014-2015 Intel Corporation
> - *
> - * This driver is based on Intel SCU IPC driver(intel_scu_ipc.c) by
> - * Sreedhara DS <sreedhara.ds@...el.com>
> - *
> - * PMC running in ARC processor communicates with other entity running in IA
> - * core through IPC mechanism which in turn messaging between IA core ad PMC.
> - */
> -
> -#include <linux/acpi.h>
> -#include <linux/delay.h>
> -#include <linux/errno.h>
> -#include <linux/interrupt.h>
> -#include <linux/io-64-nonatomic-lo-hi.h>
> -#include <linux/module.h>
> -#include <linux/platform_device.h>
> -
> -#include <asm/intel_pmc_ipc.h>
> -#include <asm/intel_scu_ipc.h>
> -
> -#include <linux/platform_data/itco_wdt.h>
> -
> -/* Residency with clock rate at 19.2MHz to usecs */
> -#define S0IX_RESIDENCY_IN_USECS(d, s) \
> -({ \
> - u64 result = 10ull * ((d) + (s)); \
> - do_div(result, 192); \
> - result; \
> -})
> -
> -/* exported resources from IFWI */
> -#define PLAT_RESOURCE_IPC_INDEX 0
> -#define PLAT_RESOURCE_IPC_SIZE 0x1000
> -#define PLAT_RESOURCE_GCR_OFFSET 0x1000
> -#define PLAT_RESOURCE_GCR_SIZE 0x1000
> -#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
> -#define PLAT_RESOURCE_BIOS_IFACE_INDEX 2
> -#define PLAT_RESOURCE_TELEM_SSRAM_INDEX 3
> -#define PLAT_RESOURCE_ISP_DATA_INDEX 4
> -#define PLAT_RESOURCE_ISP_IFACE_INDEX 5
> -#define PLAT_RESOURCE_GTD_DATA_INDEX 6
> -#define PLAT_RESOURCE_GTD_IFACE_INDEX 7
> -#define PLAT_RESOURCE_ACPI_IO_INDEX 0
> -
> -/*
> - * BIOS does not create an ACPI device for each PMC function,
> - * but exports multiple resources from one ACPI device(IPC) for
> - * multiple functions. This driver is responsible to create a
> - * platform device and to export resources for those functions.
> - */
> -#define TCO_DEVICE_NAME "iTCO_wdt"
> -#define SMI_EN_OFFSET 0x40
> -#define SMI_EN_SIZE 4
> -#define TCO_BASE_OFFSET 0x60
> -#define TCO_REGS_SIZE 16
> -#define PUNIT_DEVICE_NAME "intel_punit_ipc"
> -#define TELEMETRY_DEVICE_NAME "intel_telemetry"
> -#define TELEM_SSRAM_SIZE 240
> -#define TELEM_PMC_SSRAM_OFFSET 0x1B00
> -#define TELEM_PUNIT_SSRAM_OFFSET 0x1A00
> -#define TCO_PMC_OFFSET 0x08
> -#define TCO_PMC_SIZE 0x04
> -
> -/* PMC register bit definitions */
> -
> -/* PMC_CFG_REG bit masks */
> -#define PMC_CFG_NO_REBOOT_MASK BIT_MASK(4)
> -#define PMC_CFG_NO_REBOOT_EN (1 << 4)
> -#define PMC_CFG_NO_REBOOT_DIS (0 << 4)
> -
> -static struct intel_pmc_ipc_dev {
> - struct device *dev;
> -
> - /* The following PMC BARs share the same ACPI device with the IPC */
> - resource_size_t acpi_io_base;
> - int acpi_io_size;
> - struct platform_device *tco_dev;
> -
> - /* gcr */
> - void __iomem *gcr_mem_base;
> - bool has_gcr_regs;
> - spinlock_t gcr_lock;
> -
> - /* punit */
> - struct platform_device *punit_dev;
> - unsigned int punit_res_count;
> -
> - /* Telemetry */
> - resource_size_t telem_pmc_ssram_base;
> - resource_size_t telem_punit_ssram_base;
> - int telem_pmc_ssram_size;
> - int telem_punit_ssram_size;
> - u8 telem_res_inval;
> - struct platform_device *telemetry_dev;
> -} ipcdev;
> -
> -static inline u64 gcr_data_readq(u32 offset)
> -{
> - return readq(ipcdev.gcr_mem_base + offset);
> -}
> -
> -static inline int is_gcr_valid(u32 offset)
> -{
> - if (!ipcdev.has_gcr_regs)
> - return -EACCES;
> -
> - if (offset > PLAT_RESOURCE_GCR_SIZE)
> - return -EINVAL;
> -
> - return 0;
> -}
> -
> -/**
> - * intel_pmc_gcr_read64() - Read a 64-bit PMC GCR register
> - * @offset: offset of GCR register from GCR address base
> - * @data: data pointer for storing the register output
> - *
> - * Reads the 64-bit PMC GCR register at given offset.
> - *
> - * Return: negative value on error or 0 on success.
> - */
> -int intel_pmc_gcr_read64(u32 offset, u64 *data)
> -{
> - int ret;
> -
> - spin_lock(&ipcdev.gcr_lock);
> -
> - ret = is_gcr_valid(offset);
> - if (ret < 0) {
> - spin_unlock(&ipcdev.gcr_lock);
> - return ret;
> - }
> -
> - *data = readq(ipcdev.gcr_mem_base + offset);
> -
> - spin_unlock(&ipcdev.gcr_lock);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(intel_pmc_gcr_read64);
> -
> -/**
> - * intel_pmc_gcr_update() - Update PMC GCR register bits
> - * @offset: offset of GCR register from GCR address base
> - * @mask: bit mask for update operation
> - * @val: update value
> - *
> - * Updates the bits of given GCR register as specified by
> - * @mask and @val.
> - *
> - * Return: negative value on error or 0 on success.
> - */
> -static int intel_pmc_gcr_update(u32 offset, u32 mask, u32 val)
> -{
> - u32 new_val;
> - int ret = 0;
> -
> - spin_lock(&ipcdev.gcr_lock);
> -
> - ret = is_gcr_valid(offset);
> - if (ret < 0)
> - goto gcr_ipc_unlock;
> -
> - new_val = readl(ipcdev.gcr_mem_base + offset);
> -
> - new_val &= ~mask;
> - new_val |= val & mask;
> -
> - writel(new_val, ipcdev.gcr_mem_base + offset);
> -
> - new_val = readl(ipcdev.gcr_mem_base + offset);
> -
> - /* check whether the bit update is successful */
> - if ((new_val & mask) != (val & mask)) {
> - ret = -EIO;
> - goto gcr_ipc_unlock;
> - }
> -
> -gcr_ipc_unlock:
> - spin_unlock(&ipcdev.gcr_lock);
> - return ret;
> -}
> -
> -static int update_no_reboot_bit(void *priv, bool set)
> -{
> - u32 value = set ? PMC_CFG_NO_REBOOT_EN : PMC_CFG_NO_REBOOT_DIS;
> -
> - return intel_pmc_gcr_update(PMC_GCR_PMC_CFG_REG,
> - PMC_CFG_NO_REBOOT_MASK, value);
> -}
> -
> -static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct intel_scu_ipc_dev *scu = dev_get_drvdata(dev);
> - int subcmd;
> - int cmd;
> - int ret;
> -
> - ret = sscanf(buf, "%d %d", &cmd, &subcmd);
> - if (ret != 2) {
> - dev_err(dev, "Error args\n");
> - return -EINVAL;
> - }
> -
> - ret = intel_scu_ipc_dev_simple_command(scu, cmd, subcmd);
> - if (ret) {
> - dev_err(dev, "command %d error with %d\n", cmd, ret);
> - return ret;
> - }
> - return (ssize_t)count;
> -}
> -static DEVICE_ATTR(simplecmd, 0200, NULL, intel_pmc_ipc_simple_cmd_store);
> -
> -static ssize_t intel_pmc_ipc_northpeak_store(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct intel_scu_ipc_dev *scu = dev_get_drvdata(dev);
> - unsigned long val;
> - int subcmd;
> - int ret;
> -
> - ret = kstrtoul(buf, 0, &val);
> - if (ret)
> - return ret;
> -
> - if (val)
> - subcmd = 1;
> - else
> - subcmd = 0;
> - ret = intel_scu_ipc_dev_simple_command(scu, PMC_IPC_NORTHPEAK_CTRL, subcmd);
> - if (ret) {
> - dev_err(dev, "command north %d error with %d\n", subcmd, ret);
> - return ret;
> - }
> - return (ssize_t)count;
> -}
> -static DEVICE_ATTR(northpeak, 0200, NULL, intel_pmc_ipc_northpeak_store);
> -
> -static struct attribute *intel_ipc_attrs[] = {
> - &dev_attr_northpeak.attr,
> - &dev_attr_simplecmd.attr,
> - NULL
> -};
> -
> -static const struct attribute_group intel_ipc_group = {
> - .attrs = intel_ipc_attrs,
> -};
> -
> -static const struct attribute_group *intel_ipc_groups[] = {
> - &intel_ipc_group,
> - NULL
> -};
> -
> -static struct resource punit_res_array[] = {
> - /* Punit BIOS */
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - /* Punit ISP */
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - /* Punit GTD */
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - {
> - .flags = IORESOURCE_MEM,
> - },
> -};
> -
> -#define TCO_RESOURCE_ACPI_IO 0
> -#define TCO_RESOURCE_SMI_EN_IO 1
> -#define TCO_RESOURCE_GCR_MEM 2
> -static struct resource tco_res[] = {
> - /* ACPI - TCO */
> - {
> - .flags = IORESOURCE_IO,
> - },
> - /* ACPI - SMI */
> - {
> - .flags = IORESOURCE_IO,
> - },
> -};
> -
> -static struct itco_wdt_platform_data tco_info = {
> - .name = "Apollo Lake SoC",
> - .version = 5,
> - .no_reboot_priv = &ipcdev,
> - .update_no_reboot_bit = update_no_reboot_bit,
> -};
> -
> -#define TELEMETRY_RESOURCE_PUNIT_SSRAM 0
> -#define TELEMETRY_RESOURCE_PMC_SSRAM 1
> -static struct resource telemetry_res[] = {
> - /*Telemetry*/
> - {
> - .flags = IORESOURCE_MEM,
> - },
> - {
> - .flags = IORESOURCE_MEM,
> - },
> -};
> -
> -static int ipc_create_punit_device(void)
> -{
> - struct platform_device *pdev;
> - const struct platform_device_info pdevinfo = {
> - .parent = ipcdev.dev,
> - .name = PUNIT_DEVICE_NAME,
> - .id = -1,
> - .res = punit_res_array,
> - .num_res = ipcdev.punit_res_count,
> - };
> -
> - pdev = platform_device_register_full(&pdevinfo);
> - if (IS_ERR(pdev))
> - return PTR_ERR(pdev);
> -
> - ipcdev.punit_dev = pdev;
> -
> - return 0;
> -}
> -
> -static int ipc_create_tco_device(void)
> -{
> - struct platform_device *pdev;
> - struct resource *res;
> - const struct platform_device_info pdevinfo = {
> - .parent = ipcdev.dev,
> - .name = TCO_DEVICE_NAME,
> - .id = -1,
> - .res = tco_res,
> - .num_res = ARRAY_SIZE(tco_res),
> - .data = &tco_info,
> - .size_data = sizeof(tco_info),
> - };
> -
> - res = tco_res + TCO_RESOURCE_ACPI_IO;
> - res->start = ipcdev.acpi_io_base + TCO_BASE_OFFSET;
> - res->end = res->start + TCO_REGS_SIZE - 1;
> -
> - res = tco_res + TCO_RESOURCE_SMI_EN_IO;
> - res->start = ipcdev.acpi_io_base + SMI_EN_OFFSET;
> - res->end = res->start + SMI_EN_SIZE - 1;
> -
> - pdev = platform_device_register_full(&pdevinfo);
> - if (IS_ERR(pdev))
> - return PTR_ERR(pdev);
> -
> - ipcdev.tco_dev = pdev;
> -
> - return 0;
> -}
> -
> -static int ipc_create_telemetry_device(void)
> -{
> - struct platform_device *pdev;
> - struct resource *res;
> - const struct platform_device_info pdevinfo = {
> - .parent = ipcdev.dev,
> - .name = TELEMETRY_DEVICE_NAME,
> - .id = -1,
> - .res = telemetry_res,
> - .num_res = ARRAY_SIZE(telemetry_res),
> - };
> -
> - res = telemetry_res + TELEMETRY_RESOURCE_PUNIT_SSRAM;
> - res->start = ipcdev.telem_punit_ssram_base;
> - res->end = res->start + ipcdev.telem_punit_ssram_size - 1;
> -
> - res = telemetry_res + TELEMETRY_RESOURCE_PMC_SSRAM;
> - res->start = ipcdev.telem_pmc_ssram_base;
> - res->end = res->start + ipcdev.telem_pmc_ssram_size - 1;
> -
> - pdev = platform_device_register_full(&pdevinfo);
> - if (IS_ERR(pdev))
> - return PTR_ERR(pdev);
> -
> - ipcdev.telemetry_dev = pdev;
> -
> - return 0;
> -}
> -
> -static int ipc_create_pmc_devices(void)
> -{
> - int ret;
> -
> - /* If we have ACPI based watchdog use that instead */
> - if (!acpi_has_watchdog()) {
> - ret = ipc_create_tco_device();
> - if (ret) {
> - dev_err(ipcdev.dev, "Failed to add tco platform device\n");
> - return ret;
> - }
> - }
> -
> - ret = ipc_create_punit_device();
> - if (ret) {
> - dev_err(ipcdev.dev, "Failed to add punit platform device\n");
> - platform_device_unregister(ipcdev.tco_dev);
> - return ret;
> - }
> -
> - if (!ipcdev.telem_res_inval) {
> - ret = ipc_create_telemetry_device();
> - if (ret) {
> - dev_warn(ipcdev.dev,
> - "Failed to add telemetry platform device\n");
> - platform_device_unregister(ipcdev.punit_dev);
> - platform_device_unregister(ipcdev.tco_dev);
> - }
> - }
> -
> - return ret;
> -}
> -
> -static int ipc_plat_get_res(struct platform_device *pdev,
> - struct intel_scu_ipc_pdata *pdata)
> -{
> - struct resource *res, *punit_res = punit_res_array;
> - resource_size_t start;
> - void __iomem *addr;
> - int size;
> -
> - res = platform_get_resource(pdev, IORESOURCE_IO,
> - PLAT_RESOURCE_ACPI_IO_INDEX);
> - if (!res) {
> - dev_err(&pdev->dev, "Failed to get io resource\n");
> - return -ENXIO;
> - }
> - size = resource_size(res);
> - ipcdev.acpi_io_base = res->start;
> - ipcdev.acpi_io_size = size;
> - dev_info(&pdev->dev, "io res: %pR\n", res);
> -
> - ipcdev.punit_res_count = 0;
> -
> - /* This is index 0 to cover BIOS data register */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_BIOS_DATA_INDEX);
> - if (!res) {
> - dev_err(&pdev->dev, "Failed to get res of punit BIOS data\n");
> - return -ENXIO;
> - }
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit BIOS data res: %pR\n", res);
> -
> - /* This is index 1 to cover BIOS interface register */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_BIOS_IFACE_INDEX);
> - if (!res) {
> - dev_err(&pdev->dev, "Failed to get res of punit BIOS iface\n");
> - return -ENXIO;
> - }
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit BIOS interface res: %pR\n", res);
> -
> - /* This is index 2 to cover ISP data register, optional */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_ISP_DATA_INDEX);
> - if (res) {
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit ISP data res: %pR\n", res);
> - }
> -
> - /* This is index 3 to cover ISP interface register, optional */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_ISP_IFACE_INDEX);
> - if (res) {
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit ISP interface res: %pR\n", res);
> - }
> -
> - /* This is index 4 to cover GTD data register, optional */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_GTD_DATA_INDEX);
> - if (res) {
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit GTD data res: %pR\n", res);
> - }
> -
> - /* This is index 5 to cover GTD interface register, optional */
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_GTD_IFACE_INDEX);
> - if (res) {
> - punit_res[ipcdev.punit_res_count++] = *res;
> - dev_info(&pdev->dev, "punit GTD interface res: %pR\n", res);
> - }
> -
> - pdata->irq = platform_get_irq(pdev, 0);
> -
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_IPC_INDEX);
> - if (!res) {
> - dev_err(&pdev->dev, "Failed to get ipc resource\n");
> - return -ENXIO;
> - }
> - dev_info(&pdev->dev, "ipc res: %pR\n", res);
> -
> - pdata->mem.flags = res->flags;
> - pdata->mem.start = res->start;
> - pdata->mem.end = res->start + PLAT_RESOURCE_IPC_SIZE - 1;
> -
> - start = res->start + PLAT_RESOURCE_GCR_OFFSET;
> - if (!devm_request_mem_region(&pdev->dev, start, PLAT_RESOURCE_GCR_SIZE,
> - "pmc_ipc_plat"))
> - return -EBUSY;
> -
> - addr = devm_ioremap(&pdev->dev, start, PLAT_RESOURCE_GCR_SIZE);
> - if (!addr)
> - return -ENOMEM;
> -
> - ipcdev.gcr_mem_base = addr;
> -
> - ipcdev.telem_res_inval = 0;
> - res = platform_get_resource(pdev, IORESOURCE_MEM,
> - PLAT_RESOURCE_TELEM_SSRAM_INDEX);
> - if (!res) {
> - dev_err(&pdev->dev, "Failed to get telemetry ssram resource\n");
> - ipcdev.telem_res_inval = 1;
> - } else {
> - ipcdev.telem_punit_ssram_base = res->start +
> - TELEM_PUNIT_SSRAM_OFFSET;
> - ipcdev.telem_punit_ssram_size = TELEM_SSRAM_SIZE;
> - ipcdev.telem_pmc_ssram_base = res->start +
> - TELEM_PMC_SSRAM_OFFSET;
> - ipcdev.telem_pmc_ssram_size = TELEM_SSRAM_SIZE;
> - dev_info(&pdev->dev, "telemetry ssram res: %pR\n", res);
> - }
> -
> - return 0;
> -}
> -
> -/**
> - * intel_pmc_s0ix_counter_read() - Read S0ix residency.
> - * @data: Out param that contains current S0ix residency count.
> - *
> - * Return: an error code or 0 on success.
> - */
> -int intel_pmc_s0ix_counter_read(u64 *data)
> -{
> - u64 deep, shlw;
> -
> - if (!ipcdev.has_gcr_regs)
> - return -EACCES;
> -
> - deep = gcr_data_readq(PMC_GCR_TELEM_DEEP_S0IX_REG);
> - shlw = gcr_data_readq(PMC_GCR_TELEM_SHLW_S0IX_REG);
> -
> - *data = S0IX_RESIDENCY_IN_USECS(deep, shlw);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(intel_pmc_s0ix_counter_read);
> -
> -#ifdef CONFIG_ACPI
> -static const struct acpi_device_id ipc_acpi_ids[] = {
> - { "INT34D2", 0},
> - { }
> -};
> -MODULE_DEVICE_TABLE(acpi, ipc_acpi_ids);
> -#endif
> -
> -static int ipc_plat_probe(struct platform_device *pdev)
> -{
> - struct intel_scu_ipc_pdata pdata = {};
> - struct intel_scu_ipc_dev *scu;
> - int ret;
> -
> - ipcdev.dev = &pdev->dev;
> - spin_lock_init(&ipcdev.gcr_lock);
> -
> - ret = ipc_plat_get_res(pdev, &pdata);
> - if (ret) {
> - dev_err(&pdev->dev, "Failed to request resource\n");
> - return ret;
> - }
> -
> - scu = devm_intel_scu_ipc_register(&pdev->dev, &pdata);
> - if (IS_ERR(scu))
> - return PTR_ERR(scu);
> -
> - platform_set_drvdata(pdev, scu);
> -
> - ret = ipc_create_pmc_devices();
> - if (ret) {
> - dev_err(&pdev->dev, "Failed to create pmc devices\n");
> - return ret;
> - }
> -
> - ipcdev.has_gcr_regs = true;
> -
> - return 0;
> -}
> -
> -static int ipc_plat_remove(struct platform_device *pdev)
> -{
> - platform_device_unregister(ipcdev.tco_dev);
> - platform_device_unregister(ipcdev.punit_dev);
> - platform_device_unregister(ipcdev.telemetry_dev);
> - ipcdev.dev = NULL;
> - return 0;
> -}
> -
> -static struct platform_driver ipc_plat_driver = {
> - .remove = ipc_plat_remove,
> - .probe = ipc_plat_probe,
> - .driver = {
> - .name = "pmc-ipc-plat",
> - .acpi_match_table = ACPI_PTR(ipc_acpi_ids),
> - .dev_groups = intel_ipc_groups,
> - },
> -};
> -
> -static int __init intel_pmc_ipc_init(void)
> -{
> - return platform_driver_register(&ipc_plat_driver);
> -}
> -
> -static void __exit intel_pmc_ipc_exit(void)
> -{
> - platform_driver_unregister(&ipc_plat_driver);
> -}
> -
> -MODULE_AUTHOR("Zha Qipeng <qipeng.zha@...el.com>");
> -MODULE_DESCRIPTION("Intel PMC IPC driver");
> -MODULE_LICENSE("GPL v2");
> -
> -/* Some modules are dependent on this, so init earlier */
> -fs_initcall(intel_pmc_ipc_init);
> -module_exit(intel_pmc_ipc_exit);
> diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c
> index e84d3e983e0c..394b88d71da4 100644
> --- a/drivers/platform/x86/intel_telemetry_debugfs.c
> +++ b/drivers/platform/x86/intel_telemetry_debugfs.c
> @@ -16,13 +16,13 @@
> #include <linux/debugfs.h>
> #include <linux/device.h>
> #include <linux/module.h>
> +#include <linux/mfd/intel_pmc_bxt.h>
Alphabetical order?
> #include <linux/pci.h>
> #include <linux/seq_file.h>
> #include <linux/suspend.h>
>
> #include <asm/cpu_device_id.h>
> #include <asm/intel-family.h>
> -#include <asm/intel_pmc_ipc.h>
> #include <asm/intel_telemetry.h>
>
> #define DRIVER_NAME "telemetry_soc_debugfs"
> @@ -648,10 +648,11 @@ DEFINE_SHOW_ATTRIBUTE(telem_soc_states);
>
> static int telem_s0ix_res_get(void *data, u64 *val)
> {
> + struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
> u64 s0ix_total_res;
> int ret;
>
> - ret = intel_pmc_s0ix_counter_read(&s0ix_total_res);
> + ret = intel_pmc_s0ix_counter_read(plt_config->pmc, &s0ix_total_res);
> if (ret) {
> pr_err("Failed to read S0ix residency");
> return ret;
> @@ -836,12 +837,15 @@ static int pm_suspend_exit_cb(void)
> */
> if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp &&
> suspend_deep_ctr_exit == suspend_deep_ctr_temp) {
> - ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_SHLW_S0IX_REG,
> + struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
> + struct intel_pmc_dev *pmc = plt_config->pmc;
> +
> + ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_SHLW_S0IX_REG,
> &suspend_shlw_res_exit);
> if (ret < 0)
> goto out;
>
> - ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_DEEP_S0IX_REG,
> + ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_DEEP_S0IX_REG,
> &suspend_deep_res_exit);
> if (ret < 0)
> goto out;
> diff --git a/drivers/platform/x86/intel_telemetry_pltdrv.c b/drivers/platform/x86/intel_telemetry_pltdrv.c
> index d39dde634866..cd2f4962076c 100644
> --- a/drivers/platform/x86/intel_telemetry_pltdrv.c
> +++ b/drivers/platform/x86/intel_telemetry_pltdrv.c
> @@ -1118,6 +1118,8 @@ static int telemetry_pltdrv_probe(struct platform_device *pdev)
>
> telm_conf = (struct telemetry_plt_config *)id->driver_data;
>
> + telm_conf->pmc = dev_get_drvdata(pdev->dev.parent);
> +
> res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!res0) {
> ret = -EINVAL;
> diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
> index 5b986d6c801d..fa3f39336246 100644
> --- a/drivers/usb/typec/tcpm/Kconfig
> +++ b/drivers/usb/typec/tcpm/Kconfig
> @@ -41,8 +41,8 @@ config TYPEC_FUSB302
> config TYPEC_WCOVE
> tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver"
> depends on ACPI
> + depends on MFD_INTEL_PMC_BXT
> depends on INTEL_SOC_PMIC
> - depends on INTEL_PMC_IPC
> depends on BXT_WC_PMIC_OPREGION
> help
> This driver adds support for USB Type-C on Intel Broxton platforms
> diff --git a/include/linux/mfd/intel_pmc_bxt.h b/include/linux/mfd/intel_pmc_bxt.h
> new file mode 100644
> index 000000000000..a5fb41910d78
> --- /dev/null
> +++ b/include/linux/mfd/intel_pmc_bxt.h
> @@ -0,0 +1,21 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef MFD_INTEL_PMC_BXT_H
> +#define MFD_INTEL_PMC_BXT_H
> +
> +#include <linux/types.h>
> +
> +/* GCR reg offsets from GCR base */
> +#define PMC_GCR_PMC_CFG_REG 0x08
> +#define PMC_GCR_TELEM_DEEP_S0IX_REG 0x78
> +#define PMC_GCR_TELEM_SHLW_S0IX_REG 0x80
> +
> +/*
> + * Pointer to the PMC device can be obtained by calling
> + * dev_get_drvdata() to the parent MFD device.
> + */
> +struct intel_pmc_dev;
> +
> +int intel_pmc_s0ix_counter_read(struct intel_pmc_dev *pmc, u64 *data);
> +int intel_pmc_gcr_read64(struct intel_pmc_dev *pmc, u32 offset, u64 *data);
> +
> +#endif /* MFD_INTEL_PMC_BXT_H */
> --
> 2.24.1
>
--
With Best Regards,
Andy Shevchenko
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