Merge tag 'drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "These are all the driver updates for SoC specific drivers. There are a
  couple of subsystems with individual maintainers picking up their
  patches here:

   - The reset controller subsystem add support for a few new SoC
     variants to existing drivers, along with other minor improvements

   - The OP-TEE subsystem gets a driver for the ARM FF-A transport

   - The memory controller subsystem has improvements for Tegra,
     Mediatek, Renesas, Freescale and Broadcom specific drivers.

   - The tegra cpuidle driver changes get merged through this tree this
     time. There are only minor changes, but they depend on other tegra
     driver updates here.

   - The ep93xx platform finally moves to using the drivers/clk/
     subsystem, moving the code out of arch/arm in the process. This
     depends on a small sound driver change that is included here as
     well.

   - There are some minor updates for Qualcomm and Tegra specific
     firmware drivers.

  The other driver updates are mainly for drivers/soc, which contains a
  mixture of vendor specific drivers that don't really fit elsewhere:

   - Mediatek drivers gain more support for MT8192, with new support for
     hw-mutex and mmsys routing, plus support for reset lines in the
     mmsys driver.

   - Qualcomm gains a new "sleep stats" driver, and support for the
     "Generic Packet Router" in the APR driver.

   - There is a new user interface for routing the UARTS on ASpeed BMCs,
     something that apparently nobody else has needed so far.

   - More drivers can now be built as loadable modules, in particular
     for Broadcom and Samsung platforms.

   - Lots of improvements to the TI sysc driver for better
     suspend/resume support"

  Finally, there are lots of minor cleanups and new device IDs for
  amlogic, renesas, tegra, qualcomm, mediateka, samsung, imx,
  layerscape, allwinner, broadcom, and omap"

* tag 'drivers-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (179 commits)
  optee: Fix spelling mistake "reclain" -> "reclaim"
  Revert "firmware: qcom: scm: Add support for MC boot address API"
  qcom: spm: allow compile-testing
  firmware: arm_ffa: Remove unused 'compat_version' variable
  soc: samsung: exynos-chipid: add exynosautov9 SoC support
  firmware: qcom: scm: Don't break compile test on non-ARM platforms
  soc: qcom: smp2p: Add of_node_put() before goto
  soc: qcom: apr: Add of_node_put() before return
  soc: qcom: qcom_stats: Fix client votes offset
  soc: qcom: rpmhpd: fix sm8350_mxc's peer domain
  dt-bindings: arm: cpus: Document qcom,msm8916-smp enable-method
  ARM: qcom: Add qcom,msm8916-smp enable-method identical to MSM8226
  firmware: qcom: scm: Add support for MC boot address API
  soc: qcom: spm: Add 8916 SPM register data
  dt-bindings: soc: qcom: spm: Document qcom,msm8916-saw2-v3.0-cpu
  soc: qcom: socinfo: Add PM8150C and SMB2351 models
  firmware: qcom_scm: Fix error retval in __qcom_scm_is_call_available()
  soc: aspeed: Add UART routing support
  soc: fsl: dpio: rename the enqueue descriptor variable
  soc: fsl: dpio: use an explicit NULL instead of 0
  ...

96 files changed, 6617 insertions, 2355 deletions

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index a4cf3d692dc3..3c68e174a113 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -30,7 +30,7 @@ config ARM_INTEGRATOR_LM
 	  found on the ARM Integrator AP (Application Platform)
 
 config BRCMSTB_GISB_ARB
-	bool "Broadcom STB GISB bus arbiter"
+	tristate "Broadcom STB GISB bus arbiter"
 	depends on ARM || ARM64 || MIPS
 	default ARCH_BRCMSTB || BMIPS_GENERIC
 	help
diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
index 6551286a60cc..4c2f7d61cb9b 100644
--- a/drivers/bus/brcmstb_gisb.c
+++ b/drivers/bus/brcmstb_gisb.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (C) 2014-2017 Broadcom
+ * Copyright (C) 2014-2021 Broadcom
  */
 
 #include <linux/init.h>
@@ -536,6 +536,7 @@ static struct platform_driver brcmstb_gisb_arb_driver = {
 		.name	= "brcm-gisb-arb",
 		.of_match_table = brcmstb_gisb_arb_of_match,
 		.pm	= &brcmstb_gisb_arb_pm_ops,
+		.suppress_bind_attrs = true,
 	},
 };
 
@@ -546,3 +547,7 @@ static int __init brcm_gisb_driver_init(void)
 }
 
 module_init(brcm_gisb_driver_init);
+
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("Broadcom STB GISB arbiter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
index 672518741f86..414f29cdedf0 100644
--- a/drivers/bus/sun50i-de2.c
+++ b/drivers/bus/sun50i-de2.c
@@ -15,10 +15,9 @@ static int sun50i_de2_bus_probe(struct platform_device *pdev)
 	int ret;
 
 	ret = sunxi_sram_claim(&pdev->dev);
-	if (ret) {
-		dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Couldn't map SRAM to device\n");
 
 	of_platform_populate(np, NULL, NULL, &pdev->dev);
 
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 6a8b7fb5be58..54c0ee6dda30 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -6,6 +6,7 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/cpu_pm.h>
 #include <linux/delay.h>
 #include <linux/list.h>
 #include <linux/module.h>
@@ -17,6 +18,7 @@
 #include <linux/of_platform.h>
 #include <linux/slab.h>
 #include <linux/sys_soc.h>
+#include <linux/timekeeping.h>
 #include <linux/iopoll.h>
 
 #include <linux/platform_data/ti-sysc.h>
@@ -51,11 +53,18 @@ struct sysc_address {
 	struct list_head node;
 };
 
+struct sysc_module {
+	struct sysc *ddata;
+	struct list_head node;
+};
+
 struct sysc_soc_info {
 	unsigned long general_purpose:1;
 	enum sysc_soc soc;
-	struct mutex list_lock;			/* disabled modules list lock */
+	struct mutex list_lock;	/* disabled and restored modules list lock */
 	struct list_head disabled_modules;
+	struct list_head restored_modules;
+	struct notifier_block nb;
 };
 
 enum sysc_clocks {
@@ -131,6 +140,7 @@ struct sysc {
 	struct ti_sysc_cookie cookie;
 	const char *name;
 	u32 revision;
+	u32 sysconfig;
 	unsigned int reserved:1;
 	unsigned int enabled:1;
 	unsigned int needs_resume:1;
@@ -147,6 +157,7 @@ struct sysc {
 
 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
 				  bool is_child);
+static int sysc_reset(struct sysc *ddata);
 
 static void sysc_write(struct sysc *ddata, int offset, u32 value)
 {
@@ -223,37 +234,77 @@ static u32 sysc_read_sysstatus(struct sysc *ddata)
 	return sysc_read(ddata, offset);
 }
 
-/* Poll on reset status */
-static int sysc_wait_softreset(struct sysc *ddata)
+static int sysc_poll_reset_sysstatus(struct sysc *ddata)
 {
-	u32 sysc_mask, syss_done, rstval;
-	int syss_offset, error = 0;
-
-	if (ddata->cap->regbits->srst_shift < 0)
-		return 0;
-
-	syss_offset = ddata->offsets[SYSC_SYSSTATUS];
-	sysc_mask = BIT(ddata->cap->regbits->srst_shift);
+	int error, retries;
+	u32 syss_done, rstval;
 
 	if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED)
 		syss_done = 0;
 	else
 		syss_done = ddata->cfg.syss_mask;
 
-	if (syss_offset >= 0) {
+	if (likely(!timekeeping_suspended)) {
 		error = readx_poll_timeout_atomic(sysc_read_sysstatus, ddata,
 				rstval, (rstval & ddata->cfg.syss_mask) ==
 				syss_done, 100, MAX_MODULE_SOFTRESET_WAIT);
+	} else {
+		retries = MAX_MODULE_SOFTRESET_WAIT;
+		while (retries--) {
+			rstval = sysc_read_sysstatus(ddata);
+			if ((rstval & ddata->cfg.syss_mask) == syss_done)
+				return 0;
+			udelay(2); /* Account for udelay flakeyness */
+		}
+		error = -ETIMEDOUT;
+	}
+
+	return error;
+}
+
+static int sysc_poll_reset_sysconfig(struct sysc *ddata)
+{
+	int error, retries;
+	u32 sysc_mask, rstval;
+
+	sysc_mask = BIT(ddata->cap->regbits->srst_shift);
 
-	} else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
+	if (likely(!timekeeping_suspended)) {
 		error = readx_poll_timeout_atomic(sysc_read_sysconfig, ddata,
 				rstval, !(rstval & sysc_mask),
 				100, MAX_MODULE_SOFTRESET_WAIT);
+	} else {
+		retries = MAX_MODULE_SOFTRESET_WAIT;
+		while (retries--) {
+			rstval = sysc_read_sysconfig(ddata);
+			if (!(rstval & sysc_mask))
+				return 0;
+			udelay(2); /* Account for udelay flakeyness */
+		}
+		error = -ETIMEDOUT;
 	}
 
 	return error;
 }
 
+/* Poll on reset status */
+static int sysc_wait_softreset(struct sysc *ddata)
+{
+	int syss_offset, error = 0;
+
+	if (ddata->cap->regbits->srst_shift < 0)
+		return 0;
+
+	syss_offset = ddata->offsets[SYSC_SYSSTATUS];
+
+	if (syss_offset >= 0)
+		error = sysc_poll_reset_sysstatus(ddata);
+	else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS)
+		error = sysc_poll_reset_sysconfig(ddata);
+
+	return error;
+}
+
 static int sysc_add_named_clock_from_child(struct sysc *ddata,
 					   const char *name,
 					   const char *optfck_name)
@@ -1094,7 +1145,8 @@ set_midle:
 	best_mode = fls(ddata->cfg.midlemodes) - 1;
 	if (best_mode > SYSC_IDLE_MASK) {
 		dev_err(dev, "%s: invalid midlemode\n", __func__);
-		return -EINVAL;
+		error = -EINVAL;
+		goto save_context;
 	}
 
 	if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
@@ -1112,13 +1164,16 @@ set_autoidle:
 		sysc_write_sysconfig(ddata, reg);
 	}
 
-	/* Flush posted write */
-	sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
+	error = 0;
+
+save_context:
+	/* Save context and flush posted write */
+	ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
 
 	if (ddata->module_enable_quirk)
 		ddata->module_enable_quirk(ddata);
 
-	return 0;
+	return error;
 }
 
 static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode)
@@ -1175,8 +1230,10 @@ static int sysc_disable_module(struct device *dev)
 set_sidle:
 	/* Set SIDLE mode */
 	idlemodes = ddata->cfg.sidlemodes;
-	if (!idlemodes || regbits->sidle_shift < 0)
-		return 0;
+	if (!idlemodes || regbits->sidle_shift < 0) {
+		ret = 0;
+		goto save_context;
+	}
 
 	if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) {
 		best_mode = SYSC_IDLE_FORCE;
@@ -1184,7 +1241,8 @@ set_sidle:
 		ret = sysc_best_idle_mode(idlemodes, &best_mode);
 		if (ret) {
 			dev_err(dev, "%s: invalid sidlemode\n", __func__);
-			return ret;
+			ret = -EINVAL;
+			goto save_context;
 		}
 	}
 
@@ -1195,10 +1253,13 @@ set_sidle:
 		reg |= 1 << regbits->autoidle_shift;