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
  ...

4 files changed, 72 insertions, 20 deletions

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index c9fb56afbcb4..14f900047ac0 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -167,6 +167,27 @@ struct ffa_drv_info {
 
 static struct ffa_drv_info *drv_info;
 
+/*
+ * The driver must be able to support all the versions from the earliest
+ * supported FFA_MIN_VERSION to the latest supported FFA_DRIVER_VERSION.
+ * The specification states that if firmware supports a FFA implementation
+ * that is incompatible with and at a greater version number than specified
+ * by the caller(FFA_DRIVER_VERSION passed as parameter to FFA_VERSION),
+ * it must return the NOT_SUPPORTED error code.
+ */
+static u32 ffa_compatible_version_find(u32 version)
+{
+	u16 major = MAJOR_VERSION(version), minor = MINOR_VERSION(version);
+	u16 drv_major = MAJOR_VERSION(FFA_DRIVER_VERSION);
+	u16 drv_minor = MINOR_VERSION(FFA_DRIVER_VERSION);
+
+	if ((major < drv_major) || (major == drv_major && minor <= drv_minor))
+		return version;
+
+	pr_info("Firmware version higher than driver version, downgrading\n");
+	return FFA_DRIVER_VERSION;
+}
+
 static int ffa_version_check(u32 *version)
 {
 	ffa_value_t ver;
@@ -180,15 +201,20 @@ static int ffa_version_check(u32 *version)
 		return -EOPNOTSUPP;
 	}
 
-	if (ver.a0 < FFA_MIN_VERSION || ver.a0 > FFA_DRIVER_VERSION) {
-		pr_err("Incompatible version %d.%d found\n",
-		       MAJOR_VERSION(ver.a0), MINOR_VERSION(ver.a0));
+	if (ver.a0 < FFA_MIN_VERSION) {
+		pr_err("Incompatible v%d.%d! Earliest supported v%d.%d\n",
+		       MAJOR_VERSION(ver.a0), MINOR_VERSION(ver.a0),
+		       MAJOR_VERSION(FFA_MIN_VERSION),
+		       MINOR_VERSION(FFA_MIN_VERSION));
 		return -EINVAL;
 	}
 
-	*version = ver.a0;
-	pr_info("Version %d.%d found\n", MAJOR_VERSION(ver.a0),
+	pr_info("Driver version %d.%d\n", MAJOR_VERSION(FFA_DRIVER_VERSION),
+		MINOR_VERSION(FFA_DRIVER_VERSION));
+	pr_info("Firmware version %d.%d found\n", MAJOR_VERSION(ver.a0),
 		MINOR_VERSION(ver.a0));
+	*version = ffa_compatible_version_find(ver.a0);
+
 	return 0;
 }
 
@@ -586,6 +612,22 @@ ffa_memory_share(struct ffa_device *dev, struct ffa_mem_ops_args *args)
 	return ffa_memory_ops(FFA_FN_NATIVE(MEM_SHARE), args);
 }
 
+static int
+ffa_memory_lend(struct ffa_device *dev, struct ffa_mem_ops_args *args)
+{
+	/* Note that upon a successful MEM_LEND request the caller
+	 * must ensure that the memory region specified is not accessed
+	 * until a successful MEM_RECALIM call has been made.
+	 * On systems with a hypervisor present this will been enforced,
+	 * however on systems without a hypervisor the responsibility
+	 * falls to the calling kernel driver to prevent access.
+	 */
+	if (dev->mode_32bit)
+		return ffa_memory_ops(FFA_MEM_LEND, args);
+
+	return ffa_memory_ops(FFA_FN_NATIVE(MEM_LEND), args);
+}
+
 static const struct ffa_dev_ops ffa_ops = {
 	.api_version_get = ffa_api_version_get,
 	.partition_info_get = ffa_partition_info_get,
@@ -593,6 +635,7 @@ static const struct ffa_dev_ops ffa_ops = {
 	.sync_send_receive = ffa_sync_send_receive,
 	.memory_reclaim = ffa_memory_reclaim,
 	.memory_share = ffa_memory_share,
+	.memory_lend = ffa_memory_lend,
 };
 
 const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev)
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 2ee97bab7440..7db8066b19fd 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -252,7 +252,7 @@ static bool __qcom_scm_is_call_available(struct device *dev, u32 svc_id,
 		break;
 	default:
 		pr_err("Unknown SMC convention being used\n");
-		return -EINVAL;
+		return false;
 	}
 
 	ret = qcom_scm_call(dev, &desc, &res);
@@ -1348,6 +1348,10 @@ static const struct of_device_id qcom_scm_dt_match[] = {
 							     SCM_HAS_IFACE_CLK |
 							     SCM_HAS_BUS_CLK)
 	},
+	{ .compatible = "qcom,scm-msm8953", .data = (void *)(SCM_HAS_CORE_CLK |
+							     SCM_HAS_IFACE_CLK |
+							     SCM_HAS_BUS_CLK)
+	},
 	{ .compatible = "qcom,scm-msm8974", .data = (void *)(SCM_HAS_CORE_CLK |
 							     SCM_HAS_IFACE_CLK |
 							     SCM_HAS_BUS_CLK)
diff --git a/drivers/firmware/tegra/bpmp-debugfs.c b/drivers/firmware/tegra/bpmp-debugfs.c
index 3e9fa4b54358..6d66fe03fb6a 100644
--- a/drivers/firmware/tegra/bpmp-debugfs.c
+++ b/drivers/firmware/tegra/bpmp-debugfs.c
@@ -74,28 +74,36 @@ static void seqbuf_seek(struct seqbuf *seqbuf, ssize_t offset)
 static const char *get_filename(struct tegra_bpmp *bpmp,
 				const struct file *file, char *buf, int size)
 {
-	char root_path_buf[512];
-	const char *root_path;
-	const char *filename;
+	const char *root_path, *filename = NULL;
+	char *root_path_buf;
 	size_t root_len;
 
+	root_path_buf = kzalloc(512, GFP_KERNEL);
+	if (!root_path_buf)
+		goto out;
+
 	root_path = dentry_path(bpmp->debugfs_mirror, root_path_buf,
 				sizeof(root_path_buf));
 	if (IS_ERR(root_path))
-		return NULL;
+		goto out;
 
 	root_len = strlen(root_path);
 
 	filename = dentry_path(file->f_path.dentry, buf, size);
-	if (IS_ERR(filename))
-		return NULL;
+	if (IS_ERR(filename)) {
+		filename = NULL;
+		goto out;
+	}
 
-	if (strlen(filename) < root_len ||
-			strncmp(filename, root_path, root_len))
-		return NULL;
+	if (strlen(filename) < root_len || strncmp(filename, root_path, root_len)) {
+		filename = NULL;
+		goto out;
+	}
 
 	filename += root_len;
 
+out:
+	kfree(root_path_buf);
 	return filename;
 }
 
diff --git a/drivers/firmware/tegra/bpmp-tegra210.c b/drivers/firmware/tegra/bpmp-tegra210.c
index c32754055c60..c9c830f658c3 100644
--- a/drivers/firmware/tegra/bpmp-tegra210.c
+++ b/drivers/firmware/tegra/bpmp-tegra210.c
@@ -162,7 +162,6 @@ static int tegra210_bpmp_init(struct tegra_bpmp *bpmp)
 {
 	struct platform_device *pdev = to_platform_device(bpmp->dev);
 	struct tegra210_bpmp *priv;
-	struct resource *res;
 	unsigned int i;
 	int err;
 
@@ -172,13 +171,11 @@ static int tegra210_bpmp_init(struct tegra_bpmp *bpmp)
 
 	bpmp->priv = priv;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->atomics = devm_ioremap_resource(&pdev->dev, res);
+	priv->atomics = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->atomics))
 		return PTR_ERR(priv->atomics);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	priv->arb_sema = devm_ioremap_resource(&pdev->dev, res);
+	priv->arb_sema = devm_platform_ioremap_resource(pdev, 1);
 	if (IS_ERR(priv->arb_sema))
 		return PTR_ERR(priv->arb_sema);