This add suspend to ram support for the PCIe (RC mode) on J7200 platform. In RC mode, the reset pin for endpoints is managed by a gpio expander on a i2c bus. This pin shall be managed in suspend_noirq() and resume_noirq(). The suspend/resume has been moved to suspend_noirq()/resume_noirq() for pca953x (expander) and pinctrl-single. To do i2c accesses during suspend_noirq/resume_noirq, we need to force the wakeup of the i2c controller (which is autosuspended) during suspend callback. It's the only way to wakeup the controller if it's autosuspended, as runtime pm is disabled in suspend_noirq and resume_noirq. The main change in this v2 is the add of mux_chip_resume() function in the mux core. This function restores the state of mux-chip using cached state. It's used by mmio driver in the resume_noirq() callback. Signed-off-by: Thomas Richard <thomas.richard@xxxxxxxxxxx> --- Changes in v2: - all: fix commits messages. - all: use DEFINE_NOIRQ_DEV_PM_OPS and pm_sleep_ptr macros. - all: remove useless #ifdef CONFIG_PM. - pinctrl-single: drop dead code - mux: add mux_chip_resume() function in mux core. - mmio: resume sequence is now a call to mux_chip_resume(). - phy-cadence-torrent: fix typo in resume sequence (reset_control_assert() instead of reset_control_put()). - phy-cadence-torrent: use PHY instead of phy. - pci-j721e: do not shadow cdns_pcie_host_setup return code in resume sequence. - pci-j721e: drop dead code. - Link to v1: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v1-0-84e55da52400@xxxxxxxxxxx --- Thomas Richard (11): gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume_noirq() pinctrl: pinctrl-single: move suspend()/resume() callbacks to noirq i2c: omap: wakeup the controller during suspend() callback mux: add mux_chip_resume() function phy: ti: phy-j721e-wiz: make wiz_clock_init callable multiple times phy: ti: phy-j721e-wiz: add resume support phy: cadence-torrent: extract calls to clk_get from cdns_torrent_clk phy: cadence-torrent: register resets even if the phy is already configured phy: cadence-torrent: add already_configured to struct cdns_torrent_phy phy: cadence-torrent: remove noop_ops phy operations phy: cadence-torrent: add suspend and resume support Théo Lebrun (4): mux: mmio: add resume support PCI: cadence: add resume support to cdns_pcie_host_setup() PCI: j721e: add reset GPIO to struct j721e_pcie PCI: j721e: add suspend and resume support drivers/gpio/gpio-pca953x.c | 7 +- drivers/i2c/busses/i2c-omap.c | 14 +++ drivers/mux/core.c | 27 +++++ drivers/mux/mmio.c | 12 ++ drivers/pci/controller/cadence/pci-j721e.c | 93 ++++++++++++++-- drivers/pci/controller/cadence/pcie-cadence-host.c | 49 +++++---- drivers/pci/controller/cadence/pcie-cadence-plat.c | 2 +- drivers/pci/controller/cadence/pcie-cadence.h | 4 +- drivers/phy/cadence/phy-cadence-torrent.c | 122 +++++++++++++++------ drivers/phy/ti/phy-j721e-wiz.c | 95 ++++++++++++---- drivers/pinctrl/pinctrl-single.c | 28 ++--- include/linux/mux/driver.h | 1 + 12 files changed, 343 insertions(+), 111 deletions(-) --- base-commit: 00ff0f9ce40db8e64fe16c424a965fd7ab769c42 change-id: 20240102-j7200-pcie-s2r-ecb1a979e357 Best regards, -- Thomas Richard <thomas.richard@xxxxxxxxxxx>
