This patch series includes Tegra210 deepsleep (SC7) support with RTC alarm wake event. This series also includes save and restore of PLLs, clocks, OSC contexts for deepsleep exit to normal operation. This patch series doesn't support 100% suspend/resume to allow fully functional state upon resume and we are working on some more drivers suspend and resume implementations. [v8]: Changes between v7 & v8 are - v7 feedback fixes - moved clock enable/disable state and reset enable/disable state restore from clk_save/restore_context back to clk-tegra210 driver to do complete register value store/restore. - Removed manual store/restore of peripheral parent context and added API in clk core to retrieve clock parent index to use during restoring parent on resume. - Implemented Tegra recommended clock source programming sequence during restore (CLK ENB ON followed by divider/source programming followed by restoring CLK ENB ON/OFF state followed by restoring RST state). - Removed pinctrl suspend/resume patch from this series as pinctrl suspend/resume patch from v7 got acked and merged. - Added pinctrl patch-0001 to update pmx_writel for proper placement of write barrier. - Added pinctrl patch-0002 to insert write barrier after all pinctrl register writes during pinctrl resume. Note: Below patch is also needed for SC7 support as GPIO restore need to happen prior to pinctrl. https://patchwork.kernel.org/patch/11012077/ [v7]: Changes between V6 & v7 are - V6 feedback fixes - Removed patch-0001 from V6 which keeps COP IRQ enabled. Looking more into ATF FW, it loads SC7 entry FW into IRAM and sets the COP reset vector to SC7 FW load address and resets COP. So, COP IRQ can be cleared during suspend. Note: Below patch is also needed for SC7 support as GPIO restore need to happen prior to pinctrl. https://patchwork.kernel.org/patch/11012077/ [V6]: Changes between V5 & V6 are - V5 feedback fixes - DFLL suspend and resume moved to DFLL clock driver - Add suspend and resume support for CPUFreq driver to explicitly switch source to safe source of PLLP and disable DFLL clock. - Fix to super clock driver to enable PLLP branch to CPU before source switch to PLLP. - Added save and restore support for super clock driver. [V5]: Changes between V4 & V5 are - V4 feedback fixes [V4]: Changes between V3 & V4 are - V3 feedback fixes - Removed park bits clear for EMMC pads in pinctrl-tegra driver function tegra_pinctrl_clear_parked_bits as based on V3 feedback parked_bit is updated to parked_bitmask to use with DRV_PINGROUP as well and thierry posted patch series for this. - Implemented all peripheral clocks save and restore through their corresponding clk_ops save_context and restore_context and removed all direct registers store and restore in clk-tegra210 driver. - Created separate patch for fence_delay update during PLLU init based on V3 feedback. - Added more comments in tegra210_clk_resume regarding dfll restore sequence and its dependency on peripheral clocks restore. [V3]: Changes between V2 & V3 are - V2 feedback fixes - GPIO restore should happen prior to Pinctrl restore to prevent glitch on GPIO lines. So using resume_noirq for gpio tegra to allow gpio resume prior to pinctrl resume. - Implemented save_context and restore_context callbacks for clock plls, pll outs and dividers in corresponding drivers. Note: Peripheral clocks and clock enable and reset need to be in Tegra210 clock suspend/resume as they need to be in proper sequence w.r.t DFLL resume for restoring CPU clock. - Removed gpio-tegra changes for hierarchical support to have PMC as parent to GPIOs for GPIO wake event support. Thierry is working on gpiolib for some cleanup before adding hierarchical support. So holding on to GPIO wake support for now. [V2] : V1 feedback fixes Patch 0002: This version still using syscore. Thierry suggest not to use syscore and waiting on suggestion from Linux Walleij for any better way of storing current state of pins before suspend entry and restoring them on resume at very early stage. So left this the same way as V1 and will address once I get more feedback on this. Also need to findout and implement proper way of forcing resume order between pinctrl and gpio driver. [V1]: Tegra210 SC7 entry and exit thru RTC wake and Power button GPIO wake using hierarchical IRQ with PMC as parent to GPIO. Sowjanya Komatineni (21): pinctrl: tegra: Fix write barrier placement in pmx_writel pinctrl: tegra: Add write barrier after all pinctrl register writes clk: tegra: divider: Save and restore divider rate clk: tegra: pllout: Save and restore pllout context clk: tegra: pll: Save and restore pll context clk: tegra: Support for OSC context save and restore clk: Add API to get index of the clock parent clk: tegra: periph: Add restore_context support clk: tegra: clk-super: Fix to enable PLLP branches to CPU clk: tegra: clk-super: Add restore-context support clk: tegra: clk-dfll: Add suspend and resume support cpufreq: tegra124: Add suspend and resume support clk: tegra210: Use fence_udelay during PLLU init clk: tegra210: Add suspend and resume support soc/tegra: pmc: Allow to support more tegras wake soc/tegra: pmc: Add pmc wake support for tegra210 arm64: tegra: Enable wake from deep sleep on RTC alarm soc/tegra: pmc: Configure core power request polarity soc/tegra: pmc: Configure deep sleep control settings arm64: dts: tegra210-p2180: Jetson TX1 SC7 timings arm64: dts: tegra210-p3450: Jetson Nano SC7 timings arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 7 ++ arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 7 ++ arch/arm64/boot/dts/nvidia/tegra210.dtsi | 5 +- drivers/clk/clk.c | 17 +++ drivers/clk/tegra/clk-dfll.c | 56 +++++++++ drivers/clk/tegra/clk-dfll.h | 2 + drivers/clk/tegra/clk-divider.c | 11 ++ drivers/clk/tegra/clk-periph.c | 18 +++ drivers/clk/tegra/clk-pll-out.c | 9 ++ drivers/clk/tegra/clk-pll.c | 88 +++++++++----- drivers/clk/tegra/clk-sdmmc-mux.c | 12 ++ drivers/clk/tegra/clk-super.c | 35 ++++++ drivers/clk/tegra/clk-tegra-fixed.c | 15 +++ drivers/clk/tegra/clk-tegra-super-gen4.c | 7 +- drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 1 + drivers/clk/tegra/clk-tegra210.c | 114 ++++++++++++++++-- drivers/clk/tegra/clk.c | 78 +++++++++++++ drivers/clk/tegra/clk.h | 17 +++ drivers/cpufreq/tegra124-cpufreq.c | 60 ++++++++++ drivers/pinctrl/tegra/pinctrl-tegra.c | 6 +- drivers/soc/tegra/pmc.c | 129 ++++++++++++++++++++- include/linux/clk-provider.h | 1 + 22 files changed, 646 insertions(+), 49 deletions(-) -- 2.7.4
