From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keerthy Subject: [PATCH 3/5] arm: mach-omap2: pm33xx: Add support for rtc+ddr in self refresh mode Date: Fri, 22 Mar 2019 22:46:17 +0530 Message-ID: <20190322171619.4180-4-j-keerthy@ti.com> References: <20190322171619.4180-1-j-keerthy@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190322171619.4180-1-j-keerthy@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: tony@atomide.com, alexandre.belloni@bootlin.com, a.zummo@towertech.it, t-kristo@ti.com Cc: linux-rtc@vger.kernel.org, d-gerlach@ti.com, j-keerthy@ti.com, ssantosh@kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: linux-omap@vger.kernel.org Add support for rtc+ddr in self refresh mode. Add addtional pm hooks for save/restore and rtc suspend/resume. Signed-off-by: Keerthy --- arch/arm/mach-omap2/pm33xx-core.c | 76 +++++++++++++++++++++++++++- include/linux/platform_data/pm33xx.h | 5 ++ 2 files changed, 80 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/pm33xx-core.c b/arch/arm/mach-omap2/pm33xx-core.c index 724cf5774a6c..8c02fc73a7a5 100644 --- a/arch/arm/mach-omap2/pm33xx-core.c +++ b/arch/arm/mach-omap2/pm33xx-core.c @@ -10,6 +10,12 @@ #include #include #include +#include +#include +#include +#include +#include +#include #include "cm33xx.h" #include "common.h" @@ -38,6 +44,29 @@ static int am43xx_map_scu(void) return 0; } +static int am33xx_check_off_mode_enable(void) +{ + if (enable_off_mode) + pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n"); + + /* off mode not supported on am335x so return 0 always */ + return 0; +} + +static int am43xx_check_off_mode_enable(void) +{ + /* + * Check for am437x-sk-evm which due to HW design cannot support + * this mode reliably. + */ + if (of_machine_is_compatible("ti,am437x-sk-evm") && enable_off_mode) { + pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n"); + return 0; + } + + return enable_off_mode; +} + static int amx3_common_init(void) { gfx_pwrdm = pwrdm_lookup("gfx_pwrdm"); @@ -139,7 +168,9 @@ static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long), scu_power_mode(scu_base, SCU_PM_POWEROFF); ret = cpu_suspend(args, fn); scu_power_mode(scu_base, SCU_PM_NORMAL); - amx3_post_suspend_common(); + + if (!am43xx_check_off_mode_enable()) + amx3_post_suspend_common(); return ret; } @@ -161,10 +192,48 @@ void __iomem *am43xx_get_rtc_base_addr(void) return omap_hwmod_get_mpu_rt_va(rtc_oh); } +static void am43xx_save_context(void) +{ +} + +static void am33xx_save_context(void) +{ + omap_intc_save_context(); +} + +static void am33xx_restore_context(void) +{ + omap_intc_restore_context(); +} + +static void am43xx_restore_context(void) +{ + /* + * HACK: restore dpll_per_clkdcoldo register contents, to avoid + * breaking suspend-resume + */ + writel_relaxed(0x0, AM33XX_L4_WK_IO_ADDRESS(0x44df2e14)); +} + +static void am43xx_prepare_rtc_suspend(void) +{ + omap_hwmod_enable(rtc_oh); +} + +static void am43xx_prepare_rtc_resume(void) +{ + omap_hwmod_idle(rtc_oh); +} + static struct am33xx_pm_platform_data am33xx_ops = { .init = am33xx_suspend_init, .soc_suspend = am33xx_suspend, .get_sram_addrs = amx3_get_sram_addrs, + .save_context = am33xx_save_context, + .restore_context = am33xx_restore_context, + .prepare_rtc_suspend = am43xx_prepare_rtc_suspend, + .prepare_rtc_resume = am43xx_prepare_rtc_resume, + .check_off_mode_enable = am33xx_check_off_mode_enable, .get_rtc_base_addr = am43xx_get_rtc_base_addr, }; @@ -172,6 +241,11 @@ static struct am33xx_pm_platform_data am43xx_ops = { .init = am43xx_suspend_init, .soc_suspend = am43xx_suspend, .get_sram_addrs = amx3_get_sram_addrs, + .save_context = am43xx_save_context, + .restore_context = am43xx_restore_context, + .prepare_rtc_suspend = am43xx_prepare_rtc_suspend, + .prepare_rtc_resume = am43xx_prepare_rtc_resume, + .check_off_mode_enable = am43xx_check_off_mode_enable, .get_rtc_base_addr = am43xx_get_rtc_base_addr, }; diff --git a/include/linux/platform_data/pm33xx.h b/include/linux/platform_data/pm33xx.h index fbf5ed73c7cc..dd5971937a64 100644 --- a/include/linux/platform_data/pm33xx.h +++ b/include/linux/platform_data/pm33xx.h @@ -51,6 +51,11 @@ struct am33xx_pm_platform_data { unsigned long args); struct am33xx_pm_sram_addr *(*get_sram_addrs)(void); void __iomem *(*get_rtc_base_addr)(void); + void (*save_context)(void); + void (*restore_context)(void); + void (*prepare_rtc_suspend)(void); + void (*prepare_rtc_resume)(void); + int (*check_off_mode_enable)(void); }; struct am33xx_pm_sram_data { -- 2.17.1