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

Pull ARM SoC driver updates from Arnd Bergmann:
 "This branch contains platform-related driver updates for ARM and
  ARM64, these are the areas that bring the changes:

  New drivers:

   - driver support for Renesas R-Car V3M (R8A77970)

   - power management support for Amlogic GX

   - a new driver for the Tegra BPMP thermal sensor

   - a new bus driver for Technologic Systems NBUS

  Changes for subsystems that prefer to merge through arm-soc:

   - the usual updates for reset controller drivers from Philipp Zabel,
     with five added drivers for SoCs in the arc, meson, socfpa,
     uniphier and mediatek families

   - updates to the ARM SCPI and PSCI frameworks, from Sudeep Holla,
     Heiner Kallweit and Lorenzo Pieralisi

  Changes specific to some ARM-based SoC

   - the Freescale/NXP DPAA QBMan drivers from PowerPC can now work on
     ARM as well

   - several changes for power management on Broadcom SoCs

   - various improvements on Qualcomm, Broadcom, Amlogic, Atmel,
     Mediatek

   - minor Cleanups for Samsung, TI OMAP SoCs"

[ NOTE! This doesn't work without the previous ARM SoC device-tree pull,
  because the R8A77970 driver is missing a header file that came from
  that pull.

  The fact that this got merged afterwards only fixes it at this point,
  and bisection of that driver will fail if/when you walk into the
  history of that driver.           - Linus ]

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (96 commits)
  soc: amlogic: meson-gx-pwrc-vpu: fix power-off when powered by bootloader
  bus: add driver for the Technologic Systems NBUS
  memory: omap-gpmc: Remove deprecated gpmc_update_nand_reg()
  soc: qcom: remove unused label
  soc: amlogic: gx pm domain: add PM and OF dependencies
  drivers/firmware: psci_checker: Add missing destroy_timer_on_stack()
  dt-bindings: power: add amlogic meson power domain bindings
  soc: amlogic: add Meson GX VPU Domains driver
  soc: qcom: Remote filesystem memory driver
  dt-binding: soc: qcom: Add binding for rmtfs memory
  of: reserved_mem: Accessor for acquiring reserved_mem
  of/platform: Generalize /reserved-memory handling
  soc: mediatek: pwrap: fix fatal compiler error
  soc: mediatek: pwrap: fix compiler errors
  arm64: mediatek: cleanup message for platform selection
  soc: Allow test-building of MediaTek drivers
  soc: mediatek: place Kconfig for all SoC drivers under menu
  soc: mediatek: pwrap: add support for MT7622 SoC
  soc: mediatek: pwrap: add common way for setup CS timing extenstion
  soc: mediatek: pwrap: add MediaTek MT6380 as one slave of pwrap
  ..

4 files changed, 441 insertions, 0 deletions

diff --git a/drivers/soc/amlogic/Kconfig b/drivers/soc/amlogic/Kconfig
index 22acf064531f..b04f6e4aedbc 100644
--- a/drivers/soc/amlogic/Kconfig
+++ b/drivers/soc/amlogic/Kconfig
@@ -9,4 +9,25 @@ config MESON_GX_SOCINFO
 	  Say yes to support decoding of Amlogic Meson GX SoC family
 	  information about the type, package and version.
 
+config MESON_GX_PM_DOMAINS
+	bool "Amlogic Meson GX Power Domains driver"
+	depends on ARCH_MESON || COMPILE_TEST
+	depends on PM && OF
+	default ARCH_MESON
+	select PM_GENERIC_DOMAINS
+	select PM_GENERIC_DOMAINS_OF
+	help
+	  Say yes to expose Amlogic Meson GX Power Domains as
+	  Generic Power Domains.
+
+config MESON_MX_SOCINFO
+	bool "Amlogic Meson MX SoC Information driver"
+	depends on ARCH_MESON || COMPILE_TEST
+	default ARCH_MESON
+	select SOC_BUS
+	help
+	  Say yes to support decoding of Amlogic Meson6, Meson8,
+	  Meson8b and Meson8m2 SoC family information about the type
+	  and version.
+
 endmenu
diff --git a/drivers/soc/amlogic/Makefile b/drivers/soc/amlogic/Makefile
index 3e85fc462c21..8fa321893928 100644
--- a/drivers/soc/amlogic/Makefile
+++ b/drivers/soc/amlogic/Makefile
@@ -1 +1,3 @@
 obj-$(CONFIG_MESON_GX_SOCINFO) += meson-gx-socinfo.o
+obj-$(CONFIG_MESON_GX_PM_DOMAINS) += meson-gx-pwrc-vpu.o
+obj-$(CONFIG_MESON_MX_SOCINFO) += meson-mx-socinfo.o
diff --git a/drivers/soc/amlogic/meson-gx-pwrc-vpu.c b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c
new file mode 100644
index 000000000000..2bdeebc48901
--- /dev/null
+++ b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reset.h>
+#include <linux/clk.h>
+
+/* AO Offsets */
+
+#define AO_RTI_GEN_PWR_SLEEP0		(0x3a << 2)
+
+#define GEN_PWR_VPU_HDMI		BIT(8)
+#define GEN_PWR_VPU_HDMI_ISO		BIT(9)
+
+/* HHI Offsets */
+
+#define HHI_MEM_PD_REG0			(0x40 << 2)
+#define HHI_VPU_MEM_PD_REG0		(0x41 << 2)
+#define HHI_VPU_MEM_PD_REG1		(0x42 << 2)
+
+struct meson_gx_pwrc_vpu {
+	struct generic_pm_domain genpd;
+	struct regmap *regmap_ao;
+	struct regmap *regmap_hhi;
+	struct reset_control *rstc;
+	struct clk *vpu_clk;
+	struct clk *vapb_clk;
+};
+
+static inline
+struct meson_gx_pwrc_vpu *genpd_to_pd(struct generic_pm_domain *d)
+{
+	return container_of(d, struct meson_gx_pwrc_vpu, genpd);
+}
+
+static int meson_gx_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, GEN_PWR_VPU_HDMI_ISO);
+	udelay(20);
+
+	/* Power Down Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x2 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x2 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), BIT(i));
+		udelay(5);
+	}
+	udelay(20);
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, GEN_PWR_VPU_HDMI);
+
+	msleep(20);
+
+	clk_disable_unprepare(pd->vpu_clk);
+	clk_disable_unprepare(pd->vapb_clk);
+
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_setup_clk(struct meson_gx_pwrc_vpu *pd)
+{
+	int ret;
+
+	ret = clk_prepare_enable(pd->vpu_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(pd->vapb_clk);
+	if (ret)
+		clk_disable_unprepare(pd->vpu_clk);
+
+	return ret;
+}
+
+static int meson_gx_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int ret;
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, 0);
+	udelay(20);
+
+	/* Power Up Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x2 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x2 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), 0);
+		udelay(5);
+	}
+	udelay(20);
+
+	ret = reset_control_assert(pd->rstc);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, 0);
+
+	ret = reset_control_deassert(pd->rstc);
+	if (ret)
+		return ret;
+
+	ret = meson_gx_pwrc_vpu_setup_clk(pd);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static bool meson_gx_pwrc_vpu_get_power(struct meson_gx_pwrc_vpu *pd)
+{
+	u32 reg;
+
+	regmap_read(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0, &reg);
+
+	return (reg & GEN_PWR_VPU_HDMI);
+}
+
+static struct meson_gx_pwrc_vpu vpu_hdmi_pd = {
+	.genpd = {
+		.name = "vpu_hdmi",
+		.power_off = meson_gx_pwrc_vpu_power_off,
+		.power_on = meson_gx_pwrc_vpu_power_on,
+	},
+};
+
+static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
+{
+	struct regmap *regmap_ao, *regmap_hhi;
+	struct reset_control *rstc;
+	struct clk *vpu_clk;
+	struct clk *vapb_clk;
+	bool powered_off;
+	int ret;
+
+	regmap_ao = syscon_node_to_regmap(of_get_parent(pdev->dev.of_node));
+	if (IS_ERR(regmap_ao)) {
+		dev_err(&pdev->dev, "failed to get regmap\n");
+		return PTR_ERR(regmap_ao);
+	}
+
+	regmap_hhi = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+						     "amlogic,hhi-sysctrl");
+	if (IS_ERR(regmap_hhi)) {
+		dev_err(&pdev->dev, "failed to get HHI regmap\n");
+		return PTR_ERR(regmap_hhi);
+	}
+
+	rstc = devm_reset_control_array_get(&pdev->dev, false, false);
+	if (IS_ERR(rstc)) {
+		dev_err(&pdev->dev, "failed to get reset lines\n");
+		return PTR_ERR(rstc);
+	}
+
+	vpu_clk = devm_clk_get(&pdev->dev, "vpu");
+	if (IS_ERR(vpu_clk)) {
+		dev_err(&pdev->dev, "vpu clock request failed\n");
+		return PTR_ERR(vpu_clk);
+	}
+
+	vapb_clk = devm_clk_get(&pdev->dev, "vapb");
+	if (IS_ERR(vapb_clk)) {
+		dev_err(&pdev->dev, "vapb clock request failed\n");
+		return PTR_ERR(vapb_clk);
+	}
+
+	vpu_hdmi_pd.regmap_ao = regmap_ao;
+	vpu_hdmi_pd.regmap_hhi = regmap_hhi;
+	vpu_hdmi_pd.rstc = rstc;
+	vpu_hdmi_pd.vpu_clk = vpu_clk;
+	vpu_hdmi_pd.vapb_clk = vapb_clk;
+
+	powered_off = meson_gx_pwrc_vpu_get_power(&vpu_hdmi_pd);
+
+	/* If already powered, sync the clock states */
+	if (!powered_off) {
+		ret = meson_gx_pwrc_vpu_setup_clk(&vpu_hdmi_pd);
+		if (ret)
+			return ret;
+	}
+
+	pm_genpd_init(&vpu_hdmi_pd.genpd, &pm_domain_always_on_gov,
+		      powered_off);
+
+	return of_genpd_add_provider_simple(pdev->dev.of_node,
+					    &vpu_hdmi_pd.genpd);
+}
+
+static void meson_gx_pwrc_vpu_shutdown(struct platform_device *pdev)
+{
+	meson_gx_pwrc_vpu_power_off(&vpu_hdmi_pd.genpd);
+}
+
+static const struct of_device_id meson_gx_pwrc_vpu_match_table[] = {
+	{ .compatible = "amlogic,meson-gx-pwrc-vpu" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver meson_gx_pwrc_vpu_driver = {
+	.probe	= meson_gx_pwrc_vpu_probe,
+	.shutdown = meson_gx_pwrc_vpu_shutdown,
+	.driver = {
+		.name		= "meson_gx_pwrc_vpu",
+		.of_match_table	= meson_gx_pwrc_vpu_match_table,
+	},
+};
+builtin_platform_driver(meson_gx_pwrc_vpu_driver);
diff --git a/drivers/soc/amlogic/meson-mx-socinfo.c b/drivers/soc/amlogic/meson-mx-socinfo.c
new file mode 100644
index 000000000000..7bfff5ff22a2
--- /dev/null
+++ b/drivers/soc/amlogic/meson-mx-socinfo.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#define MESON_SOCINFO_MAJOR_VER_MESON6		0x16
+#define MESON_SOCINFO_MAJOR_VER_MESON8		0x19
+#define MESON_SOCINFO_MAJOR_VER_MESON8B		0x1b
+
+#define MESON_MX_ASSIST_HW_REV			0x14c
+
+#define MESON_MX_ANALOG_TOP_METAL_REVISION	0x0
+
+#define MESON_MX_BOOTROM_MISC_VER		0x4
+
+static const char *meson_mx_socinfo_revision(unsigned int major_ver,
+					     unsigned int misc_ver,
+					     unsigned int metal_rev)
+{
+	unsigned int minor_ver;
+
+	switch (major_ver) {
+	case MESON_SOCINFO_MAJOR_VER_MESON6:
+		minor_ver = 0xa;
+		break;
+
+	case MESON_SOCINFO_MAJOR_VER_MESON8:
+		if (metal_rev == 0x11111112)
+			major_ver = 0x1d;
+
+		if (metal_rev == 0x11111111 || metal_rev == 0x11111112)
+			minor_ver = 0xa;
+		else if (metal_rev == 0x11111113)
+			minor_ver = 0xb;
+		else if (metal_rev == 0x11111133)
+			minor_ver = 0xc;
+		else
+			minor_ver = 0xd;
+
+		break;
+
+	case MESON_SOCINFO_MAJOR_VER_MESON8B:
+		if (metal_rev == 0x11111111)
+			minor_ver = 0xa;
+		else
+			minor_ver = 0xb;
+
+		break;
+
+	default:
+		minor_ver = 0x0;
+		break;
+	}
+
+	return kasprintf(GFP_KERNEL, "Rev%X (%x - 0:%X)", minor_ver, major_ver,
+			 misc_ver);
+}
+
+static const char *meson_mx_socinfo_soc_id(unsigned int major_ver,
+					   unsigned int metal_rev)
+{
+	const char *soc_id;
+
+	switch (major_ver) {
+	case MESON_SOCINFO_MAJOR_VER_MESON6:
+		soc_id = "Meson6 (AML8726-MX)";
+		break;
+
+	case MESON_SOCINFO_MAJOR_VER_MESON8:
+		if (metal_rev == 0x11111112)
+			soc_id = "Meson8m2 (S812)";
+		else
+			soc_id = "Meson8 (S802)";
+
+		break;
+
+	case MESON_SOCINFO_MAJOR_VER_MESON8B:
+		soc_id = "Meson8b (S805)";
+		break;
+
+	default:
+		soc_id = "Unknown";
+		break;
+	}
+
+	return kstrdup_const(soc_id, GFP_KERNEL);
+}
+
+static const struct of_device_id meson_mx_socinfo_analog_top_ids[] = {
+	{ .compatible = "amlogic,meson8-analog-top", },
+	{ .compatible = "amlogic,meson8b-analog-top", },
+	{ /* sentinel */ }
+};
+
+int __init meson_mx_socinfo_init(void)
+{
+	struct soc_device_attribute *soc_dev_attr;
+	struct soc_device *soc_dev;
+	struct device_node *np;
+	struct regmap *assist_regmap, *bootrom_regmap, *analog_top_regmap;
+	unsigned int major_ver, misc_ver, metal_rev = 0;
+	int ret;
+
+	assist_regmap =
+		syscon_regmap_lookup_by_compatible("amlogic,meson-mx-assist");
+	if (IS_ERR(assist_regmap))
+		return PTR_ERR(assist_regmap);
+
+	bootrom_regmap =
+		syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom");
+	if (IS_ERR(bootrom_regmap))
+		return PTR_ERR(bootrom_regmap);
+
+	np = of_find_matching_node(NULL, meson_mx_socinfo_analog_top_ids);
+	if (np) {
+		analog_top_regmap = syscon_node_to_regmap(np);
+		if (IS_ERR(analog_top_regmap))
+			return PTR_ERR(analog_top_regmap);
+
+		ret = regmap_read(analog_top_regmap,
+				  MESON_MX_ANALOG_TOP_METAL_REVISION,
+				  &metal_rev);
+		if (ret)
+			return ret;
+	}
+
+	ret = regmap_read(assist_regmap, MESON_MX_ASSIST_HW_REV, &major_ver);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER,
+			  &misc_ver);
+	if (ret < 0)
+		return ret;
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		return -ENODEV;
+
+	soc_dev_attr->family = "Amlogic Meson";
+
+	np = of_find_node_by_path("/");
+	of_property_read_string(np, "model", &soc_dev_attr->machine);
+	of_node_put(np);
+
+	soc_dev_attr->revision = meson_mx_socinfo_revision(major_ver, misc_ver,
+							   metal_rev);
+	soc_dev_attr->soc_id = meson_mx_socinfo_soc_id(major_ver, metal_rev);
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree_const(soc_dev_attr->revision);
+		kfree_const(soc_dev_attr->soc_id);
+		kfree(soc_dev_attr);
+		return PTR_ERR(soc_dev);
+	}
+
+	dev_info(soc_device_to_device(soc_dev), "Amlogic %s %s detected\n",
+		 soc_dev_attr->soc_id, soc_dev_attr->revision);
+
+	return 0;
+}
+device_initcall(meson_mx_socinfo_init);