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Date: Thu, 11 Jan 2018 14:39:54 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>, kgene@...nel.org,
Tomasz Figa <tomasz.figa@...il.com>, chanwoo@...nel.org,
Jaehoon Chung <jh80.chung@...sung.com>,
Inki Dae <inki.dae@...sung.com>,
linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, Jonghwa Lee <jonghwa3.lee@...sung.com>
Subject: Re: [PATCH 3/9] soc: samsung: pmu: Add the PMU data of exynos5433
to support low-power state
On 2018년 01월 09일 21:23, Krzysztof Kozlowski wrote:
> On Tue, Jan 9, 2018 at 8:59 AM, Chanwoo Choi <cw00.choi@...sung.com> wrote:
>> This patch adds the PMU (Power Management Unit) data of exynos5433 SoC
>> in order to support the various power modes. Each power mode has
>> the different value for reducing the power-consumption.
>>
>> Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> ---
>> arch/arm/mach-exynos/common.h | 2 -
>> drivers/soc/samsung/Makefile | 3 +-
>> drivers/soc/samsung/exynos-pmu.c | 1 +
>> drivers/soc/samsung/exynos-pmu.h | 2 +
>> drivers/soc/samsung/exynos5433-pmu.c | 286 ++++++++++++++++++++++++++++
>> include/linux/soc/samsung/exynos-regs-pmu.h | 148 ++++++++++++++
>> 6 files changed, 439 insertions(+), 3 deletions(-)
>> create mode 100644 drivers/soc/samsung/exynos5433-pmu.c
>>
>> diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
>> index 098f84a149a3..afbc143a3d5d 100644
>> --- a/arch/arm/mach-exynos/common.h
>> +++ b/arch/arm/mach-exynos/common.h
>> @@ -125,8 +125,6 @@ enum {
>> void exynos_set_boot_flag(unsigned int cpu, unsigned int mode);
>> void exynos_clear_boot_flag(unsigned int cpu, unsigned int mode);
>>
>> -extern u32 exynos_get_eint_wake_mask(void);
>> -
>
> This does not look good. Does it compile without warnings on ARMv7 platforms?
I'll try to consolidate suspend-related code. I'll rework.
>
>> #ifdef CONFIG_PM_SLEEP
>> extern void __init exynos_pm_init(void);
>> #else
>> diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile
>> index 29f294baac6e..d2e637339a45 100644
>> --- a/drivers/soc/samsung/Makefile
>> +++ b/drivers/soc/samsung/Makefile
>> @@ -2,5 +2,6 @@
>> obj-$(CONFIG_EXYNOS_PMU) += exynos-pmu.o
>>
>> obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS) += exynos3250-pmu.o exynos4-pmu.o \
>> - exynos5250-pmu.o exynos5420-pmu.o
>> + exynos5250-pmu.o exynos5420-pmu.o \
>> + exynos5433-pmu.o
>> obj-$(CONFIG_EXYNOS_PM_DOMAINS) += pm_domains.o
>> diff --git a/drivers/soc/samsung/exynos-pmu.c b/drivers/soc/samsung/exynos-pmu.c
>> index cfc9de518344..7112d7b2749b 100644
>> --- a/drivers/soc/samsung/exynos-pmu.c
>> +++ b/drivers/soc/samsung/exynos-pmu.c
>> @@ -97,6 +97,7 @@ void exynos_sys_powerup_conf(enum sys_powerdown mode)
>> .data = exynos_pmu_data_arm_ptr(exynos5420_pmu_data),
>> }, {
>> .compatible = "samsung,exynos5433-pmu",
>> + .data = exynos_pmu_data_arm_ptr(exynos5433_pmu_data),
>> },
>> { /*sentinel*/ },
>> };
>> diff --git a/drivers/soc/samsung/exynos-pmu.h b/drivers/soc/samsung/exynos-pmu.h
>> index efbaf8929252..895c786a2f4c 100644
>> --- a/drivers/soc/samsung/exynos-pmu.h
>> +++ b/drivers/soc/samsung/exynos-pmu.h
>> @@ -28,6 +28,7 @@ struct exynos_pmu_data {
>> };
>>
>> extern void __iomem *pmu_base_addr;
>> +extern u32 exynos_get_eint_wake_mask(void);
>>
>> #ifdef CONFIG_EXYNOS_PMU_ARM_DRIVERS
>> /* list of all exported SoC specific data */
>> @@ -36,6 +37,7 @@ struct exynos_pmu_data {
>> extern const struct exynos_pmu_data exynos4412_pmu_data;
>> extern const struct exynos_pmu_data exynos5250_pmu_data;
>> extern const struct exynos_pmu_data exynos5420_pmu_data;
>> +extern const struct exynos_pmu_data exynos5433_pmu_data;
>> #endif
>>
>> extern void pmu_raw_writel(u32 val, u32 offset);
>> diff --git a/drivers/soc/samsung/exynos5433-pmu.c b/drivers/soc/samsung/exynos5433-pmu.c
>> new file mode 100644
>> index 000000000000..2571e61522f0
>> --- /dev/null
>> +++ b/drivers/soc/samsung/exynos5433-pmu.c
>> @@ -0,0 +1,286 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +//
>> +// Copyright (c) 2018 Samsung Electronics Co., Ltd.
>> +// Copyright (c) Jonghwa Lee <jonghwa3.lee@...sung.com>
>> +// Copyright (c) Chanwoo Choi <cw00.choi@...sung.com>
>
> Did you want to add here authorship notice or personal copyrights?
Remove personal info.
>
>> +//
>> +// EXYNOS5433 - CPU PMU (Power Management Unit) support
>> +
>> +#include <linux/soc/samsung/exynos-regs-pmu.h>
>> +#include <linux/soc/samsung/exynos-pmu.h>
>> +
>> +#include "exynos-pmu.h"
>> +
>> +static struct exynos_pmu_conf exynos5433_pmu_config[] = {
>
> This should be also const.
OK.
>
>> + /* { .offset = address, .val = { AFTR, LPA, SLEEP } } */
>> + { EXYNOS5433_ATLAS_CPU0_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_ATLAS_CPU0_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_ATLAS_CPU1_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_ATLAS_CPU1_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_ATLAS_CPU2_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_ATLAS_CPU2_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_ATLAS_CPU3_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_ATLAS_CPU3_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_APOLLO_CPU0_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_APOLLO_CPU0_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_APOLLO_CPU1_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_APOLLO_CPU1_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_APOLLO_CPU2_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_APOLLO_CPU2_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_APOLLO_CPU3_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_DIS_IRQ_APOLLO_CPU3_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_ATLAS_NONCPU_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_APOLLO_NONCPU_SYS_PWR_REG, { 0x0, 0x0, 0x8 } },
>> + { EXYNOS5433_A5IS_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_DIS_IRQ_A5IS_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_DIS_IRQ_A5IS_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0 } },
>> + { EXYNOS5433_ATLAS_L2_SYS_PWR_REG, { 0x0, 0x0, 0x7 } },
>> + { EXYNOS5433_APOLLO_L2_SYS_PWR_REG, { 0x0, 0x0, 0x7 } },
>> + { EXYNOS5433_CLKSTOP_CMU_TOP_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_CLKRUN_CMU_TOP_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_RESET_CMU_TOP_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_RESET_CPUCLKSTOP_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_CLKSTOP_CMU_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_CLKRUN_CMU_MIF_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_RESET_CMU_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_DDRPHY_DLLLOCK_SYS_PWR_REG, { 0x1, 0x1, 0x1 } },
>> + { EXYNOS5433_DISABLE_PLL_CMU_TOP_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_DISABLE_PLL_AUD_PLL_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_DISABLE_PLL_CMU_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_TOP_BUS_SYS_PWR_REG, { 0x7, 0x0, 0x0 } },
>> + { EXYNOS5433_TOP_RETENTION_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_TOP_PWR_SYS_PWR_REG, { 0x3, 0x0, 0x3 } },
>> + { EXYNOS5433_TOP_BUS_MIF_SYS_PWR_REG, { 0x7, 0x0, 0x0 } },
>> + { EXYNOS5433_TOP_RETENTION_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_TOP_PWR_MIF_SYS_PWR_REG, { 0x3, 0x0, 0x3 } },
>> + { EXYNOS5433_LOGIC_RESET_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_OSCCLK_GATE_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_SLEEP_RESET_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_LOGIC_RESET_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_OSCCLK_GATE_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_SLEEP_RESET_MIF_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_MEMORY_TOP_SYS_PWR_REG, { 0x3, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_LPDDR3_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_JTAG_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_TOP_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_UART_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_EBIA_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_EBIB_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_SPI_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_ISOLATION_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_PAD_RETENTION_USBXTI_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_RETENTION_BOOTLDO_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_ISOLATION_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x1 } },
>> + { EXYNOS5433_PAD_RETENTION_FSYSGENIO_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_PAD_ALV_SEL_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_XXTI_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_XXTI26_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_EXT_REGULATOR_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_GPIO_MODE_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_GPIO_MODE_FSYS0_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_GPIO_MODE_MIF_SYS_PWR_REG, { 0x1, 0x0, 0x0 } },
>> + { EXYNOS5433_GPIO_MODE_AUD_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_GSCL_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_CAM0_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_MSCL_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_G3D_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_DISP_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_CAM1_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_AUD_SYS_PWR_REG, { 0xF, 0xF, 0x0 } },
>> + { EXYNOS5433_FSYS_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_BUS2_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_G2D_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_ISP0_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_MFC_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_HEVC_SYS_PWR_REG, { 0xF, 0x0, 0x0 } },
>> + { EXYNOS5433_RESET_SLEEP_FSYS_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { EXYNOS5433_RESET_SLEEP_BUS2_SYS_PWR_REG, { 0x1, 0x1, 0x0 } },
>> + { PMU_TABLE_END, },
>> +};
>> +
>> +static unsigned int const exynos5433_list_feed[] = {
>> + EXYNOS5433_ATLAS_NONCPU_OPTION,
>> + EXYNOS5433_APOLLO_NONCPU_OPTION,
>> + EXYNOS5433_TOP_PWR_OPTION,
>> + EXYNOS5433_TOP_PWR_MIF_OPTION,
>> + EXYNOS5433_AUD_OPTION,
>> + EXYNOS5433_CAM0_OPTION,
>> + EXYNOS5433_DISP_OPTION,
>> + EXYNOS5433_G2D_OPTION,
>> + EXYNOS5433_G3D_OPTION,
>> + EXYNOS5433_HEVC_OPTION,
>> + EXYNOS5433_MSCL_OPTION,
>> + EXYNOS5433_MFC_OPTION,
>> + EXYNOS5433_GSCL_OPTION,
>> + EXYNOS5433_FSYS_OPTION,
>> + EXYNOS5433_ISP_OPTION,
>> + EXYNOS5433_BUS2_OPTION,
>> +};
>> +
>> +static unsigned int const exynos5433_list_pad_retention[] = {
>> + EXYNOS5433_PAD_RETENTION_LPDDR3_OPTION,
>> + EXYNOS5433_PAD_RETENTION_AUD_OPTION,
>> + EXYNOS5433_PAD_RETENTION_MMC2_OPTION,
>> + EXYNOS5433_PAD_RETENTION_TOP_OPTION,
>> + EXYNOS5433_PAD_RETENTION_UART_OPTION,
>> + EXYNOS5433_PAD_RETENTION_MMC0_OPTION,
>> + EXYNOS5433_PAD_RETENTION_MMC1_OPTION,
>> + EXYNOS5433_PAD_RETENTION_EBIA_OPTION,
>> + EXYNOS5433_PAD_RETENTION_EBIB_OPTION,
>> + EXYNOS5433_PAD_RETENTION_SPI_OPTION,
>> + EXYNOS5433_PAD_RETENTION_MIF_OPTION,
>> + EXYNOS5433_PAD_RETENTION_USBXTI_OPTION,
>> + EXYNOS5433_PAD_RETENTION_BOOTLDO_OPTION,
>> + EXYNOS5433_PAD_RETENTION_UFS_OPTION,
>> + EXYNOS5433_PAD_RETENTION_FSYSGENIO_OPTION,
>
> Looks like conflicting with existing
> drivers/pinctrl/samsung/pinctrl-exynos-arm64.c... and probably this
> should be part of pinctrl driver's suspend/resume paths.
OK. I'll remove it from this driver and then I'll handle PAD_RETENTION on pinctrl driver.
>
>> +};
>> +
>> +static void exynos5433_set_wakeupmask(enum sys_powerdown mode)
>> +{
>> + u32 intmask = 0;
>> +
>> + pmu_raw_writel(exynos_get_eint_wake_mask(),
>> + EXYNOS5433_EINT_WAKEUP_MASK);
>> +
>> + /* Disable WAKEUP event monitor */
>> + intmask = pmu_raw_readl(EXYNOS5433_WAKEUP_MASK);
>> + intmask &= ~(1 << 31);
>
> This should have a define. Maybe it is an already defined field like
> S5P_CORE_AUTOWAKEUP_EN or S5P_PS_HOLD_EN?
[31] bit of WAKEUP_MASK is the reserved bit on TRM.
But, when I checked it on released code from Samsung,
it is used to disable the wakeup event monitoring circuit.
I'll define it for readability.
>
>> + pmu_raw_writel(intmask, EXYNOS5433_WAKEUP_MASK);
>> +
>> + pmu_raw_writel(0xFFFF0000, EXYNOS5433_WAKEUP_MASK2);
>> + pmu_raw_writel(0xFFFF0000, EXYNOS5433_WAKEUP_MASK3);
>
> Both need explaining what you are masking, preferably by appropriate
> comment and maybe also define for raw constants.
Initialize the reset value to EXYNOS5433_WAKEUP_MASK2/MASK3 which have
the 0xffff000 as the reset value on Exynos5433's TRM. I'll add the comment.
>
>> +}
>> +
>> +static void exynos5433_pmu_central_seq(bool enable)
>> +{
>> + unsigned int tmp;
>> +
>> + tmp = pmu_raw_readl(EXYNOS5433_CENTRAL_SEQ_CONFIGURATION);
>> + if (enable)
>> + tmp &= ~EXYNOS5433_CENTRALSEQ_PWR_CFG;
>> + else
>> + tmp |= EXYNOS5433_CENTRALSEQ_PWR_CFG;
>> + pmu_raw_writel(tmp, EXYNOS5433_CENTRAL_SEQ_CONFIGURATION);
>> +
>> + tmp = pmu_raw_readl(EXYNOS5433_CENTRAL_SEQ_MIF_CONFIGURATION);
>> + if (enable)
>> + tmp &= ~EXYNOS5433_CENTRALSEQ_PWR_CFG;
>> + else
>> + tmp |= EXYNOS5433_CENTRALSEQ_PWR_CFG;
>> + pmu_raw_writel(tmp, EXYNOS5433_CENTRAL_SEQ_MIF_CONFIGURATION);
>> +}
>> +
>> +static void exynos5433_pmu_pad_retention_release(void)
>> +{
>> + unsigned int tmp;
>> + int i;
>
> unsigned int i
OK.
>
>> +
>> + for (i = 0 ; i < ARRAY_SIZE(exynos5433_list_pad_retention) ; i++) {
>> + tmp = pmu_raw_readl(exynos5433_list_pad_retention[i]);
>> + tmp |= EXYNOS5433_INITIATE_WAKEUP_FROM_LOWPOWER;
>> + pmu_raw_writel(tmp, exynos5433_list_pad_retention[i]);
>> + }
>> +}
>> +
>> +static void exynos5433_pmu_init(void)
>> +{
>> + unsigned int tmp;
>> + int i, cluster, cpu;
>
> unsigned int i
OK.
>
>> +
>> + /* Enable non retention flip-flop reset for wakeup */
>> + tmp = pmu_raw_readl(EXYNOS5433_PMU_SPARE0);
>> + tmp |= EXYNOS5433_EN_NONRET_RESET;
>> + pmu_raw_writel(tmp, EXYNOS5433_PMU_SPARE0);
>
> This is spare register. Who is using it? Firmware? Please add its
> usage also in Documentation/arm/Samsung/Bootloader-interface.txt.
Unfortunately, when I checked the bootloader for the PMU_SPARE0 register,
the bootloader doesn't read/write for PMU_SPARE0. I fount this code
on code released by Samsung. The document doesn't include the detailed role.
>
>> +
>> + /* Enable only SC_FEEDBACK for the register list */
>> + for (i = 0 ; i < ARRAY_SIZE(exynos5433_list_feed) ; i++) {
>> + tmp = pmu_raw_readl(exynos5433_list_feed[i]);
>> + tmp &= ~EXYNOS5_USE_SC_COUNTER;
>> + tmp |= EXYNOS5_USE_SC_FEEDBACK;
>> + pmu_raw_writel(tmp, exynos5433_list_feed[i]);
>> + }
>> +
>> + /*
>> + * Disable automatic L2 flush, Disable L2 retention and
>> + * Enable STANDBYWFIL2, ACE/ACP
>> + */
>> + for (cluster = 0; cluster < 2; cluster++) {
>> + tmp = pmu_raw_readl(EXYNOS5433_ATLAS_L2_OPTION + (cluster * 0x20));
>
> I would prefer to follow the convention for similar registers for cores, like:
> EXYNOS_ARM_CORE_CONFIGURATION
> EXYNOS_ARM_CORE_STATUS
>
> This moves the offset into the header, along to other register offsets.
OK.
>
>> + tmp &= ~(EXYNOS5433_USE_AUTO_L2FLUSHREQ | EXYNOS5433_USE_RETENTION);
>> +
>> + if (cluster == 0) {
>> + tmp |= (EXYNOS5433_USE_STANDBYWFIL2 |
>> + EXYNOS5433_USE_DEACTIVATE_ACE |
>> + EXYNOS5433_USE_DEACTIVATE_ACP);
>> + }
>> + pmu_raw_writel(tmp, EXYNOS5433_ATLAS_L2_OPTION + (cluster * 0x20));
>> + }
>> +
>> + /*
>> + * Enable both SC_COUNTER and SC_FEEDBACK for the CPUs
>> + * Use STANDBYWFI and SMPEN to indicate that core is ready to enter
>> + * low power mode
>> + */
>> + for (cpu = 0; cpu < 8; cpu++) {
>> + tmp = pmu_raw_readl(EXYNOS5433_CPU_OPTION(cpu));
>> + tmp |= (EXYNOS5_USE_SC_FEEDBACK | EXYNOS5_USE_SC_COUNTER);
>> + tmp |= EXYNOS5433_USE_SMPEN;
>> + tmp |= EXYNOS5433_USE_STANDBYWFI;
>> + tmp &= ~EXYNOS5433_USE_STANDBYWFE;
>> + pmu_raw_writel(tmp, EXYNOS5433_CPU_OPTION(cpu));
>> +
>> + tmp = pmu_raw_readl(EXYNOS5433_CPU_DURATION(cpu));
>> + tmp |= EXYNOS5433_DUR_WAIT_RESET;
>> + tmp &= ~EXYNOS5433_DUR_SCALL;
>> + tmp |= EXYNOS5433_DUR_SCALL_VALUE;
>> + pmu_raw_writel(tmp, EXYNOS5433_CPU_DURATION(cpu));
>> + }
>> +
>> + /* Skip atlas block power-off during automatic power down sequence */
>> + tmp = pmu_raw_readl(EXYNOS5433_ATLAS_CPUSEQUENCER_OPTION);
>> + tmp |= EXYNOS5433_SKIP_BLK_PWR_DOWN;
>> + pmu_raw_writel(tmp, EXYNOS5433_ATLAS_CPUSEQUENCER_OPTION);
>> +
>> + /* Limit in-rush current during local power up of cores */
>> + tmp = pmu_raw_readl(EXYNOS5433_UP_SCHEDULER);
>> + tmp |= EXYNOS5433_ENABLE_ATLAS_CPU;
>> + pmu_raw_writel(tmp, EXYNOS5433_UP_SCHEDULER);
>> +}
>> +
>> +static void exynos5433_powerdown_conf(enum sys_powerdown mode)
>> +{
>> + switch (mode) {
>> + case SYS_SLEEP:
>> + exynos5433_set_wakeupmask(mode);
>> + exynos5433_pmu_central_seq(true);
>> + break;
>> + default:
>> + break;
>> + };
>> +}
>> +
>> +static void exynos5433_powerup_conf(enum sys_powerdown mode)
>> +{
>> + unsigned int wakeup;
>> +
>> + switch (mode) {
>> + case SYS_SLEEP:
>> + wakeup = pmu_raw_readl(EXYNOS5433_CENTRAL_SEQ_CONFIGURATION);
>> + wakeup &= EXYNOS5433_CENTRALSEQ_PWR_CFG;
>> + if (wakeup)
>> + exynos5433_pmu_pad_retention_release();
>> + else
>> + exynos5433_pmu_central_seq(false);
>
> I do not understand what you want to achieve here. Re-suspend?
The powerup_conf is unneeded anymore. So, I'll remove the powerup_conf.
Because
- pad_retention should be handled in pinctrl driver according to your comment.
- exynos5433_pmu_central_seq(false) set the high for SYS_PWR_CFG field
of CENTRAL_SEQ_CONFIGURATION. But, When system-level low-power mode,
SYS_PWR_CFG field of CENTRAL_SEQ_CONFIGURATION register is automatically
cleared to high. So, exynos5433_pmu_central_seq(false) call is unneeded.
>
>> + break;
>> + default:
>> + break;
>> + };
>> +}
>> +
>> +const struct exynos_pmu_data exynos5433_pmu_data = {
>> + .pmu_config = exynos5433_pmu_config,
>> + .pmu_init = exynos5433_pmu_init,
>> + .powerdown_conf = exynos5433_powerdown_conf,
>> + .powerup_conf = exynos5433_powerup_conf,
>> +};
>> diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h
>> index bebdde5dccd6..93a52d133ba1 100644
>> --- a/include/linux/soc/samsung/exynos-regs-pmu.h
>> +++ b/include/linux/soc/samsung/exynos-regs-pmu.h
>> @@ -645,7 +645,110 @@
>> | EXYNOS5420_KFC_USE_STANDBY_WFI3)
>>
>> /* For EXYNOS5433 */
>> +#define EXYNOS5433_UP_SCHEDULER (0x0120)
>> +#define EXYNOS5433_CENTRAL_SEQ_CONFIGURATION (0x0200)
>> +#define EXYNOS5433_CENTRAL_SEQ_MIF_CONFIGURATION (0x0240)
>> +#define EXYNOS5433_EINT_WAKEUP_MASK (0x060C)
>> +#define EXYNOS5433_WAKEUP_MASK (0x0610)
>> +#define EXYNOS5433_WAKEUP_MASK2 (0x0614)
>> +#define EXYNOS5433_WAKEUP_MASK3 (0x0618)
>> +#define EXYNOS5433_EINT_WAKEUP_MASK1 (0x062C)
>> #define EXYNOS5433_USBHOST30_PHY_CONTROL (0x0728)
>> +#define EXYNOS5433_PMU_SPARE0 (0x0900)
>> +#define EXYNOS5433_ATLAS_CPU0_SYS_PWR_REG (0x1000)
>> +#define EXYNOS5433_DIS_IRQ_ATLAS_CPU0_CENTRAL_SYS_PWR_REG (0x1008)
>> +#define EXYNOS5433_ATLAS_CPU1_SYS_PWR_REG (0x1010)
>> +#define EXYNOS5433_DIS_IRQ_ATLAS_CPU1_CENTRAL_SYS_PWR_REG (0x1018)
>> +#define EXYNOS5433_ATLAS_CPU2_SYS_PWR_REG (0x1020)
>> +#define EXYNOS5433_DIS_IRQ_ATLAS_CPU2_CENTRAL_SYS_PWR_REG (0x1028)
>> +#define EXYNOS5433_ATLAS_CPU3_SYS_PWR_REG (0x1030)
>> +#define EXYNOS5433_DIS_IRQ_ATLAS_CPU3_CENTRAL_SYS_PWR_REG (0x1038)
>> +#define EXYNOS5433_APOLLO_CPU0_SYS_PWR_REG (0x1040)
>> +#define EXYNOS5433_DIS_IRQ_APOLLO_CPU0_CENTRAL_SYS_PWR_REG (0x1048)
>> +#define EXYNOS5433_APOLLO_CPU1_SYS_PWR_REG (0x1050)
>> +#define EXYNOS5433_DIS_IRQ_APOLLO_CPU1_CENTRAL_SYS_PWR_REG (0x1058)
>> +#define EXYNOS5433_APOLLO_CPU2_SYS_PWR_REG (0x1060)
>> +#define EXYNOS5433_DIS_IRQ_APOLLO_CPU2_CENTRAL_SYS_PWR_REG (0x1068)
>> +#define EXYNOS5433_APOLLO_CPU3_SYS_PWR_REG (0x1070)
>> +#define EXYNOS5433_DIS_IRQ_APOLLO_CPU3_CENTRAL_SYS_PWR_REG (0x1078)
>> +#define EXYNOS5433_ATLAS_NONCPU_SYS_PWR_REG (0x1080)
>> +#define EXYNOS5433_ATLAS_L2_SYS_PWR_REG (0x10C0)
>> +#define EXYNOS5433_APOLLO_L2_SYS_PWR_REG (0x10C4)
>> +#define EXYNOS5433_APOLLO_NONCPU_SYS_PWR_REG (0x1084)
>> +#define EXYNOS5433_A5IS_SYS_PWR_REG (0x10B0)
>> +#define EXYNOS5433_DIS_IRQ_A5IS_LOCAL_SYS_PWR_REG (0x10B4)
>> +#define EXYNOS5433_DIS_IRQ_A5IS_CENTRAL_SYS_PWR_REG (0x10B8)
>> +#define EXYNOS5433_CLKSTOP_CMU_TOP_SYS_PWR_REG (0x1100)
>> +#define EXYNOS5433_CLKRUN_CMU_TOP_SYS_PWR_REG (0x1104)
>> +#define EXYNOS5433_RESET_CMU_TOP_SYS_PWR_REG (0x110C)
>> +#define EXYNOS5433_RESET_CPUCLKSTOP_SYS_PWR_REG (0x111C)
>> +#define EXYNOS5433_CLKSTOP_CMU_MIF_SYS_PWR_REG (0x1120)
>> +#define EXYNOS5433_CLKRUN_CMU_MIF_SYS_PWR_REG (0x1124)
>> +#define EXYNOS5433_RESET_CMU_MIF_SYS_PWR_REG (0x112C)
>> +#define EXYNOS5433_DDRPHY_DLLLOCK_SYS_PWR_REG (0x1138)
>> +#define EXYNOS5433_DISABLE_PLL_CMU_TOP_SYS_PWR_REG (0x1140)
>> +#define EXYNOS5433_DISABLE_PLL_AUD_PLL_SYS_PWR_REG (0x1144)
>> +#define EXYNOS5433_DISABLE_PLL_CMU_MIF_SYS_PWR_REG (0x1160)
>> +#define EXYNOS5433_TOP_BUS_SYS_PWR_REG (0x1180)
>> +#define EXYNOS5433_TOP_RETENTION_SYS_PWR_REG (0x1184)
>> +#define EXYNOS5433_TOP_PWR_SYS_PWR_REG (0x1188)
>> +#define EXYNOS5433_TOP_BUS_MIF_SYS_PWR_REG (0x1190)
>> +#define EXYNOS5433_TOP_RETENTION_MIF_SYS_PWR_REG (0x1194)
>> +#define EXYNOS5433_TOP_PWR_MIF_SYS_PWR_REG (0x1198)
>> +#define EXYNOS5433_LOGIC_RESET_SYS_PWR_REG (0x11A0)
>> +#define EXYNOS5433_OSCCLK_GATE_SYS_PWR_REG (0x11A4)
>> +#define EXYNOS5433_SLEEP_RESET_SYS_PWR_REG (0x11A8)
>> +#define EXYNOS5433_LOGIC_RESET_MIF_SYS_PWR_REG (0x11B0)
>> +#define EXYNOS5433_OSCCLK_GATE_MIF_SYS_PWR_REG (0x11B4)
>> +#define EXYNOS5433_SLEEP_RESET_MIF_SYS_PWR_REG (0x11B8)
>> +#define EXYNOS5433_MEMORY_TOP_SYS_PWR_REG (0x11C0)
>> +#define EXYNOS5433_PAD_RETENTION_LPDDR3_SYS_PWR_REG (0x1200)
>> +#define EXYNOS5433_PAD_RETENTION_JTAG_SYS_PWR_REG (0x1208)
>> +#define EXYNOS5433_PAD_RETENTION_TOP_SYS_PWR_REG (0x1220)
>> +#define EXYNOS5433_PAD_RETENTION_UART_SYS_PWR_REG (0x1224)
>> +#define EXYNOS5433_PAD_RETENTION_EBIA_SYS_PWR_REG (0x1230)
>> +#define EXYNOS5433_PAD_RETENTION_EBIB_SYS_PWR_REG (0x1234)
>> +#define EXYNOS5433_PAD_RETENTION_SPI_SYS_PWR_REG (0x1238)
>> +#define EXYNOS5433_PAD_RETENTION_MIF_SYS_PWR_REG (0x123C)
>> +#define EXYNOS5433_PAD_ISOLATION_SYS_PWR_REG (0x1240)
>> +#define EXYNOS5433_PAD_RETENTION_USBXTI_SYS_PWR_REG (0x1244)
>> +#define EXYNOS5433_PAD_RETENTION_BOOTLDO_SYS_PWR_REG (0x1248)
>> +#define EXYNOS5433_PAD_ISOLATION_MIF_SYS_PWR_REG (0x1250)
>> +#define EXYNOS5433_PAD_RETENTION_FSYSGENIO_SYS_PWR_REG (0x1254)
>> +#define EXYNOS5433_PAD_ALV_SEL_SYS_PWR_REG (0x1260)
>> +#define EXYNOS5433_XXTI_SYS_PWR_REG (0x1284)
>> +#define EXYNOS5433_XXTI26_SYS_PWR_REG (0x1288)
>> +#define EXYNOS5433_EXT_REGULATOR_SYS_PWR_REG (0x12C0)
>> +#define EXYNOS5433_GPIO_MODE_SYS_PWR_REG (0x1300)
>> +#define EXYNOS5433_GPIO_MODE_FSYS0_SYS_PWR_REG (0x1304)
>> +#define EXYNOS5433_GPIO_MODE_MIF_SYS_PWR_REG (0x1320)
>> +#define EXYNOS5433_GPIO_MODE_AUD_SYS_PWR_REG (0x1340)
>> +#define EXYNOS5433_GSCL_SYS_PWR_REG (0x1400)
>> +#define EXYNOS5433_CAM0_SYS_PWR_REG (0x1404)
>> +#define EXYNOS5433_MSCL_SYS_PWR_REG (0x1408)
>> +#define EXYNOS5433_G3D_SYS_PWR_REG (0x140C)
>> +#define EXYNOS5433_DISP_SYS_PWR_REG (0x1410)
>> +#define EXYNOS5433_CAM1_SYS_PWR_REG (0x1414)
>> +#define EXYNOS5433_AUD_SYS_PWR_REG (0x1418)
>> +#define EXYNOS5433_FSYS_SYS_PWR_REG (0x141C)
>> +#define EXYNOS5433_BUS2_SYS_PWR_REG (0x1420)
>> +#define EXYNOS5433_G2D_SYS_PWR_REG (0x1424)
>> +#define EXYNOS5433_ISP0_SYS_PWR_REG (0x1428)
>> +#define EXYNOS5433_MFC_SYS_PWR_REG (0x1430)
>> +#define EXYNOS5433_HEVC_SYS_PWR_REG (0x1438)
>> +#define EXYNOS5433_RESET_SLEEP_FSYS_SYS_PWR_REG (0x15DC)
>> +#define EXYNOS5433_RESET_SLEEP_BUS2_SYS_PWR_REG (0x15E0)
>> +#define EXYNOS5433_ATLAS_CPU0_OPTION (0x2008)
>> +#define EXYNOS5433_CPU_OPTION(_nr) (EXYNOS5433_ATLAS_CPU0_OPTION + (_nr) * 0x80)
>> +#define EXYNOS5433_ATLAS_CPU0_DURATION0 (0x2010)
>> +#define EXYNOS5433_CPU_DURATION(_nr) (EXYNOS5433_ATLAS_CPU0_DURATION0 + (_nr) * 0x80)
>> +#define EXYNOS5433_ATLAS_NONCPU_OPTION (0x2408)
>> +#define EXYNOS5433_APOLLO_NONCPU_OPTION (0x2428)
>> +#define EXYNOS5433_ATLAS_CPUSEQUENCER_OPTION (0x2488)
>> +#define EXYNOS5433_ATLAS_L2_OPTION (0x2608)
>> +#define EXYNOS5433_TOP_PWR_MIF_OPTION (0x2CC8)
>> +#define EXYNOS5433_TOP_PWR_OPTION (0x2C48)
>> +#define EXYNOS5433_PAD_RETENTION_LPDDR3_OPTION (0x3008)
>> #define EXYNOS5433_PAD_RETENTION_AUD_OPTION (0x3028)
>> #define EXYNOS5433_PAD_RETENTION_MMC2_OPTION (0x30C8)
>> #define EXYNOS5433_PAD_RETENTION_TOP_OPTION (0x3108)
>> @@ -660,5 +763,50 @@
>> #define EXYNOS5433_PAD_RETENTION_BOOTLDO_OPTION (0x3248)
>> #define EXYNOS5433_PAD_RETENTION_UFS_OPTION (0x3268)
>> #define EXYNOS5433_PAD_RETENTION_FSYSGENIO_OPTION (0x32A8)
>> +#define EXYNOS5433_PS_HOLD_CONTROL (0x330C)
>> +#define EXYNOS5433_GSCL_OPTION (0x4008)
>> +#define EXYNOS5433_CAM0_OPTION (0x4028)
>> +#define EXYNOS5433_MSCL_OPTION (0x4048)
>> +#define EXYNOS5433_G3D_OPTION (0x4068)
>> +#define EXYNOS5433_DISP_OPTION (0x4088)
>> +#define EXYNOS5433_AUD_OPTION (0x40C8)
>> +#define EXYNOS5433_FSYS_OPTION (0x40E8)
>> +#define EXYNOS5433_BUS2_OPTION (0x4108)
>> +#define EXYNOS5433_G2D_OPTION (0x4128)
>> +#define EXYNOS5433_ISP_OPTION (0x4148)
>> +#define EXYNOS5433_MFC_OPTION (0x4188)
>> +#define EXYNOS5433_HEVC_OPTION (0x41C8)
>> +
>> +/* EXYNOS5433_PMU_SPARE0 */
>> +#define EXYNOS5433_EN_NONRET_RESET (1 << 0)
>
> Use BIT(0) here and in other places.
OK.
[snip]
Thanks for the review.
--
Best Regards,
Chanwoo Choi
Samsung Electronics
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