v4.19.13 snapshot.
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
new file mode 100644
index 0000000..e4fe954
--- /dev/null
+++ b/drivers/bus/ti-sysc.c
@@ -0,0 +1,1837 @@
+/*
+ * ti-sysc.c - Texas Instruments sysc interconnect target driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/iopoll.h>
+
+#include <linux/platform_data/ti-sysc.h>
+
+#include <dt-bindings/bus/ti-sysc.h>
+
+#define MAX_MODULE_SOFTRESET_WAIT 10000
+
+static const char * const reg_names[] = { "rev", "sysc", "syss", };
+
+enum sysc_clocks {
+ SYSC_FCK,
+ SYSC_ICK,
+ SYSC_OPTFCK0,
+ SYSC_OPTFCK1,
+ SYSC_OPTFCK2,
+ SYSC_OPTFCK3,
+ SYSC_OPTFCK4,
+ SYSC_OPTFCK5,
+ SYSC_OPTFCK6,
+ SYSC_OPTFCK7,
+ SYSC_MAX_CLOCKS,
+};
+
+static const char * const clock_names[SYSC_ICK + 1] = { "fck", "ick", };
+
+#define SYSC_IDLEMODE_MASK 3
+#define SYSC_CLOCKACTIVITY_MASK 3
+
+/**
+ * struct sysc - TI sysc interconnect target module registers and capabilities
+ * @dev: struct device pointer
+ * @module_pa: physical address of the interconnect target module
+ * @module_size: size of the interconnect target module
+ * @module_va: virtual address of the interconnect target module
+ * @offsets: register offsets from module base
+ * @clocks: clocks used by the interconnect target module
+ * @clock_roles: clock role names for the found clocks
+ * @nr_clocks: number of clocks used by the interconnect target module
+ * @legacy_mode: configured for legacy mode if set
+ * @cap: interconnect target module capabilities
+ * @cfg: interconnect target module configuration
+ * @name: name if available
+ * @revision: interconnect target module revision
+ * @needs_resume: runtime resume needed on resume from suspend
+ */
+struct sysc {
+ struct device *dev;
+ u64 module_pa;
+ u32 module_size;
+ void __iomem *module_va;
+ int offsets[SYSC_MAX_REGS];
+ struct clk **clocks;
+ const char **clock_roles;
+ int nr_clocks;
+ struct reset_control *rsts;
+ const char *legacy_mode;
+ const struct sysc_capabilities *cap;
+ struct sysc_config cfg;
+ struct ti_sysc_cookie cookie;
+ const char *name;
+ u32 revision;
+ bool enabled;
+ bool needs_resume;
+ bool child_needs_resume;
+ struct delayed_work idle_work;
+};
+
+void sysc_write(struct sysc *ddata, int offset, u32 value)
+{
+ writel_relaxed(value, ddata->module_va + offset);
+}
+
+static u32 sysc_read(struct sysc *ddata, int offset)
+{
+ if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
+ u32 val;
+
+ val = readw_relaxed(ddata->module_va + offset);
+ val |= (readw_relaxed(ddata->module_va + offset + 4) << 16);
+
+ return val;
+ }
+
+ return readl_relaxed(ddata->module_va + offset);
+}
+
+static bool sysc_opt_clks_needed(struct sysc *ddata)
+{
+ return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
+}
+
+static u32 sysc_read_revision(struct sysc *ddata)
+{
+ int offset = ddata->offsets[SYSC_REVISION];
+
+ if (offset < 0)
+ return 0;
+
+ return sysc_read(ddata, offset);
+}
+
+static int sysc_get_one_clock(struct sysc *ddata, const char *name)
+{
+ int error, i, index = -ENODEV;
+
+ if (!strncmp(clock_names[SYSC_FCK], name, 3))
+ index = SYSC_FCK;
+ else if (!strncmp(clock_names[SYSC_ICK], name, 3))
+ index = SYSC_ICK;
+
+ if (index < 0) {
+ for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
+ if (!ddata->clocks[i]) {
+ index = i;
+ break;
+ }
+ }
+ }
+
+ if (index < 0) {
+ dev_err(ddata->dev, "clock %s not added\n", name);
+ return index;
+ }
+
+ ddata->clocks[index] = devm_clk_get(ddata->dev, name);
+ if (IS_ERR(ddata->clocks[index])) {
+ if (PTR_ERR(ddata->clocks[index]) == -ENOENT)
+ return 0;
+
+ dev_err(ddata->dev, "clock get error for %s: %li\n",
+ name, PTR_ERR(ddata->clocks[index]));
+
+ return PTR_ERR(ddata->clocks[index]);
+ }
+
+ error = clk_prepare(ddata->clocks[index]);
+ if (error) {
+ dev_err(ddata->dev, "clock prepare error for %s: %i\n",
+ name, error);
+
+ return error;
+ }
+
+ return 0;
+}
+
+static int sysc_get_clocks(struct sysc *ddata)
+{
+ struct device_node *np = ddata->dev->of_node;
+ struct property *prop;
+ const char *name;
+ int nr_fck = 0, nr_ick = 0, i, error = 0;
+
+ ddata->clock_roles = devm_kcalloc(ddata->dev,
+ SYSC_MAX_CLOCKS,
+ sizeof(*ddata->clock_roles),
+ GFP_KERNEL);
+ if (!ddata->clock_roles)
+ return -ENOMEM;
+
+ of_property_for_each_string(np, "clock-names", prop, name) {
+ if (!strncmp(clock_names[SYSC_FCK], name, 3))
+ nr_fck++;
+ if (!strncmp(clock_names[SYSC_ICK], name, 3))
+ nr_ick++;
+ ddata->clock_roles[ddata->nr_clocks] = name;
+ ddata->nr_clocks++;
+ }
+
+ if (ddata->nr_clocks < 1)
+ return 0;
+
+ if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
+ dev_err(ddata->dev, "too many clocks for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ if (nr_fck > 1 || nr_ick > 1) {
+ dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ ddata->clocks = devm_kcalloc(ddata->dev,
+ ddata->nr_clocks, sizeof(*ddata->clocks),
+ GFP_KERNEL);
+ if (!ddata->clocks)
+ return -ENOMEM;
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ error = sysc_get_one_clock(ddata, ddata->clock_roles[i]);
+ if (error && error != -ENOENT)
+ return error;
+ }
+
+ return 0;
+}
+
+/**
+ * sysc_init_resets - reset module on init
+ * @ddata: device driver data
+ *
+ * A module can have both OCP softreset control and external rstctrl.
+ * If more complicated rstctrl resets are needed, please handle these
+ * directly from the child device driver and map only the module reset
+ * for the parent interconnect target module device.
+ *
+ * Automatic reset of the module on init can be skipped with the
+ * "ti,no-reset-on-init" device tree property.
+ */
+static int sysc_init_resets(struct sysc *ddata)
+{
+ int error;
+
+ ddata->rsts =
+ devm_reset_control_array_get_optional_exclusive(ddata->dev);
+ if (IS_ERR(ddata->rsts))
+ return PTR_ERR(ddata->rsts);
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+ goto deassert;
+
+ error = reset_control_assert(ddata->rsts);
+ if (error)
+ return error;
+
+deassert:
+ error = reset_control_deassert(ddata->rsts);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+/**
+ * sysc_parse_and_check_child_range - parses module IO region from ranges
+ * @ddata: device driver data
+ *
+ * In general we only need rev, syss, and sysc registers and not the whole
+ * module range. But we do want the offsets for these registers from the
+ * module base. This allows us to check them against the legacy hwmod
+ * platform data. Let's also check the ranges are configured properly.
+ */
+static int sysc_parse_and_check_child_range(struct sysc *ddata)
+{
+ struct device_node *np = ddata->dev->of_node;
+ const __be32 *ranges;
+ u32 nr_addr, nr_size;
+ int len, error;
+
+ ranges = of_get_property(np, "ranges", &len);
+ if (!ranges) {
+ dev_err(ddata->dev, "missing ranges for %pOF\n", np);
+
+ return -ENOENT;
+ }
+
+ len /= sizeof(*ranges);
+
+ if (len < 3) {
+ dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ error = of_property_read_u32(np, "#address-cells", &nr_addr);
+ if (error)
+ return -ENOENT;
+
+ error = of_property_read_u32(np, "#size-cells", &nr_size);
+ if (error)
+ return -ENOENT;
+
+ if (nr_addr != 1 || nr_size != 1) {
+ dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
+
+ return -EINVAL;
+ }
+
+ ranges++;
+ ddata->module_pa = of_translate_address(np, ranges++);
+ ddata->module_size = be32_to_cpup(ranges);
+
+ return 0;
+}
+
+static struct device_node *stdout_path;
+
+static void sysc_init_stdout_path(struct sysc *ddata)
+{
+ struct device_node *np = NULL;
+ const char *uart;
+
+ if (IS_ERR(stdout_path))
+ return;
+
+ if (stdout_path)
+ return;
+
+ np = of_find_node_by_path("/chosen");
+ if (!np)
+ goto err;
+
+ uart = of_get_property(np, "stdout-path", NULL);
+ if (!uart)
+ goto err;
+
+ np = of_find_node_by_path(uart);
+ if (!np)
+ goto err;
+
+ stdout_path = np;
+
+ return;
+
+err:
+ stdout_path = ERR_PTR(-ENODEV);
+}
+
+static void sysc_check_quirk_stdout(struct sysc *ddata,
+ struct device_node *np)
+{
+ sysc_init_stdout_path(ddata);
+ if (np != stdout_path)
+ return;
+
+ ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
+ SYSC_QUIRK_NO_RESET_ON_INIT;
+}
+
+/**
+ * sysc_check_one_child - check child configuration
+ * @ddata: device driver data
+ * @np: child device node
+ *
+ * Let's avoid messy situations where we have new interconnect target
+ * node but children have "ti,hwmods". These belong to the interconnect
+ * target node and are managed by this driver.
+ */
+static int sysc_check_one_child(struct sysc *ddata,
+ struct device_node *np)
+{
+ const char *name;
+
+ name = of_get_property(np, "ti,hwmods", NULL);
+ if (name)
+ dev_warn(ddata->dev, "really a child ti,hwmods property?");
+
+ sysc_check_quirk_stdout(ddata, np);
+
+ return 0;
+}
+
+static int sysc_check_children(struct sysc *ddata)
+{
+ struct device_node *child;
+ int error;
+
+ for_each_child_of_node(ddata->dev->of_node, child) {
+ error = sysc_check_one_child(ddata, child);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+/*
+ * So far only I2C uses 16-bit read access with clockactivity with revision
+ * in two registers with stride of 4. We can detect this based on the rev
+ * register size to configure things far enough to be able to properly read
+ * the revision register.
+ */
+static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
+{
+ if (resource_size(res) == 8)
+ ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
+}
+
+/**
+ * sysc_parse_one - parses the interconnect target module registers
+ * @ddata: device driver data
+ * @reg: register to parse
+ */
+static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
+{
+ struct resource *res;
+ const char *name;
+
+ switch (reg) {
+ case SYSC_REVISION:
+ case SYSC_SYSCONFIG:
+ case SYSC_SYSSTATUS:
+ name = reg_names[reg];
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ res = platform_get_resource_byname(to_platform_device(ddata->dev),
+ IORESOURCE_MEM, name);
+ if (!res) {
+ ddata->offsets[reg] = -ENODEV;
+
+ return 0;
+ }
+
+ ddata->offsets[reg] = res->start - ddata->module_pa;
+ if (reg == SYSC_REVISION)
+ sysc_check_quirk_16bit(ddata, res);
+
+ return 0;
+}
+
+static int sysc_parse_registers(struct sysc *ddata)
+{
+ int i, error;
+
+ for (i = 0; i < SYSC_MAX_REGS; i++) {
+ error = sysc_parse_one(ddata, i);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+/**
+ * sysc_check_registers - check for misconfigured register overlaps
+ * @ddata: device driver data
+ */
+static int sysc_check_registers(struct sysc *ddata)
+{
+ int i, j, nr_regs = 0, nr_matches = 0;
+
+ for (i = 0; i < SYSC_MAX_REGS; i++) {
+ if (ddata->offsets[i] < 0)
+ continue;
+
+ if (ddata->offsets[i] > (ddata->module_size - 4)) {
+ dev_err(ddata->dev, "register outside module range");
+
+ return -EINVAL;
+ }
+
+ for (j = 0; j < SYSC_MAX_REGS; j++) {
+ if (ddata->offsets[j] < 0)
+ continue;
+
+ if (ddata->offsets[i] == ddata->offsets[j])
+ nr_matches++;
+ }
+ nr_regs++;
+ }
+
+ if (nr_regs < 1) {
+ dev_err(ddata->dev, "missing registers\n");
+
+ return -EINVAL;
+ }
+
+ if (nr_matches > nr_regs) {
+ dev_err(ddata->dev, "overlapping registers: (%i/%i)",
+ nr_regs, nr_matches);
+
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * syc_ioremap - ioremap register space for the interconnect target module
+ * @ddata: device driver data
+ *
+ * Note that the interconnect target module registers can be anywhere
+ * within the interconnect target module range. For example, SGX has
+ * them at offset 0x1fc00 in the 32MB module address space. And cpsw
+ * has them at offset 0x1200 in the CPSW_WR child. Usually the
+ * the interconnect target module registers are at the beginning of
+ * the module range though.
+ */
+static int sysc_ioremap(struct sysc *ddata)
+{
+ int size;
+
+ size = max3(ddata->offsets[SYSC_REVISION],
+ ddata->offsets[SYSC_SYSCONFIG],
+ ddata->offsets[SYSC_SYSSTATUS]);
+
+ if (size < 0 || (size + sizeof(u32)) > ddata->module_size)
+ return -EINVAL;
+
+ ddata->module_va = devm_ioremap(ddata->dev,
+ ddata->module_pa,
+ size + sizeof(u32));
+ if (!ddata->module_va)
+ return -EIO;
+
+ return 0;
+}
+
+/**
+ * sysc_map_and_check_registers - ioremap and check device registers
+ * @ddata: device driver data
+ */
+static int sysc_map_and_check_registers(struct sysc *ddata)
+{
+ int error;
+
+ error = sysc_parse_and_check_child_range(ddata);
+ if (error)
+ return error;
+
+ error = sysc_check_children(ddata);
+ if (error)
+ return error;
+
+ error = sysc_parse_registers(ddata);
+ if (error)
+ return error;
+
+ error = sysc_ioremap(ddata);
+ if (error)
+ return error;
+
+ error = sysc_check_registers(ddata);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+/**
+ * sysc_show_rev - read and show interconnect target module revision
+ * @bufp: buffer to print the information to
+ * @ddata: device driver data
+ */
+static int sysc_show_rev(char *bufp, struct sysc *ddata)
+{
+ int len;
+
+ if (ddata->offsets[SYSC_REVISION] < 0)
+ return sprintf(bufp, ":NA");
+
+ len = sprintf(bufp, ":%08x", ddata->revision);
+
+ return len;
+}
+
+static int sysc_show_reg(struct sysc *ddata,
+ char *bufp, enum sysc_registers reg)
+{
+ if (ddata->offsets[reg] < 0)
+ return sprintf(bufp, ":NA");
+
+ return sprintf(bufp, ":%x", ddata->offsets[reg]);
+}
+
+static int sysc_show_name(char *bufp, struct sysc *ddata)
+{
+ if (!ddata->name)
+ return 0;
+
+ return sprintf(bufp, ":%s", ddata->name);
+}
+
+/**
+ * sysc_show_registers - show information about interconnect target module
+ * @ddata: device driver data
+ */
+static void sysc_show_registers(struct sysc *ddata)
+{
+ char buf[128];
+ char *bufp = buf;
+ int i;
+
+ for (i = 0; i < SYSC_MAX_REGS; i++)
+ bufp += sysc_show_reg(ddata, bufp, i);
+
+ bufp += sysc_show_rev(bufp, ddata);
+ bufp += sysc_show_name(bufp, ddata);
+
+ dev_dbg(ddata->dev, "%llx:%x%s\n",
+ ddata->module_pa, ddata->module_size,
+ buf);
+}
+
+static int __maybe_unused sysc_runtime_suspend(struct device *dev)
+{
+ struct ti_sysc_platform_data *pdata;
+ struct sysc *ddata;
+ int error = 0, i;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (!ddata->enabled)
+ return 0;
+
+ if (ddata->legacy_mode) {
+ pdata = dev_get_platdata(ddata->dev);
+ if (!pdata)
+ return 0;
+
+ if (!pdata->idle_module)
+ return -ENODEV;
+
+ error = pdata->idle_module(dev, &ddata->cookie);
+ if (error)
+ dev_err(dev, "%s: could not idle: %i\n",
+ __func__, error);
+
+ goto idled;
+ }
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ if (IS_ERR_OR_NULL(ddata->clocks[i]))
+ continue;
+
+ if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+ break;
+
+ clk_disable(ddata->clocks[i]);
+ }
+
+idled:
+ ddata->enabled = false;
+
+ return error;
+}
+
+static int __maybe_unused sysc_runtime_resume(struct device *dev)
+{
+ struct ti_sysc_platform_data *pdata;
+ struct sysc *ddata;
+ int error = 0, i;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (ddata->enabled)
+ return 0;
+
+ if (ddata->legacy_mode) {
+ pdata = dev_get_platdata(ddata->dev);
+ if (!pdata)
+ return 0;
+
+ if (!pdata->enable_module)
+ return -ENODEV;
+
+ error = pdata->enable_module(dev, &ddata->cookie);
+ if (error)
+ dev_err(dev, "%s: could not enable: %i\n",
+ __func__, error);
+
+ goto awake;
+ }
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ if (IS_ERR_OR_NULL(ddata->clocks[i]))
+ continue;
+
+ if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+ break;
+
+ error = clk_enable(ddata->clocks[i]);
+ if (error)
+ return error;
+ }
+
+awake:
+ ddata->enabled = true;
+
+ return error;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sysc_suspend(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+ SYSC_QUIRK_LEGACY_IDLE))
+ return 0;
+
+ if (!ddata->enabled)
+ return 0;
+
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ error = pm_runtime_put_sync_suspend(dev);
+ if (error < 0) {
+ dev_warn(ddata->dev, "%s not idle %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
+
+ return 0;
+ }
+
+ ddata->needs_resume = true;
+
+ return 0;
+}
+
+static int sysc_resume(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+ SYSC_QUIRK_LEGACY_IDLE))
+ return 0;
+
+ if (ddata->needs_resume) {
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ error = pm_runtime_get_sync(dev);
+ if (error < 0) {
+ dev_err(ddata->dev, "%s error %i %s\n",
+ __func__, error,
+ ddata->name ? ddata->name : "");
+
+ return error;
+ }
+
+ ddata->needs_resume = false;
+ }
+
+ return 0;
+}
+
+static int sysc_noirq_suspend(struct device *dev)
+{
+ struct sysc *ddata;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+ return 0;
+
+ if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+ return 0;
+
+ if (!ddata->enabled)
+ return 0;
+
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ ddata->needs_resume = true;
+
+ return sysc_runtime_suspend(dev);
+}
+
+static int sysc_noirq_resume(struct device *dev)
+{
+ struct sysc *ddata;
+
+ ddata = dev_get_drvdata(dev);
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+ return 0;
+
+ if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+ return 0;
+
+ if (ddata->needs_resume) {
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ ddata->needs_resume = false;
+
+ return sysc_runtime_resume(dev);
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops sysc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sysc_suspend, sysc_resume)
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
+ SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
+ sysc_runtime_resume,
+ NULL)
+};
+
+/* Module revision register based quirks */
+struct sysc_revision_quirk {
+ const char *name;
+ u32 base;
+ int rev_offset;
+ int sysc_offset;
+ int syss_offset;
+ u32 revision;
+ u32 revision_mask;
+ u32 quirks;
+};
+
+#define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \
+ optrev_val, optrevmask, optquirkmask) \
+ { \
+ .name = (optname), \
+ .base = (optbase), \
+ .rev_offset = (optrev), \
+ .sysc_offset = (optsysc), \
+ .syss_offset = (optsyss), \
+ .revision = (optrev_val), \
+ .revision_mask = (optrevmask), \
+ .quirks = (optquirkmask), \
+ }
+
+static const struct sysc_revision_quirk sysc_revision_quirks[] = {
+ /* These need to use noirq_suspend */
+ SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+ SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff,
+ SYSC_QUIRK_RESOURCE_PROVIDER),
+
+ /* These drivers need to be fixed to not use pm_runtime_irq_safe() */
+ SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
+ SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("smartreflex", 0, -1, 0x38, -1, 0x00000000, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ /* Some timers on omap4 and later */
+ SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x4fff1301, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ /* Uarts on omap4 and later */
+ SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+
+ /* These devices don't yet suspend properly without legacy setting */
+ SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0d00, 0xffffffff,
+ SYSC_QUIRK_LEGACY_IDLE),
+
+#ifdef DEBUG
+ SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0),
+ SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
+ SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff, 0),
+ SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
+ SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
+ SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0),
+ SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0),
+ SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0),
+ SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0),
+ SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0),
+ SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0),
+ SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
+ SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
+ SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
+ 0xffffffff, 0),
+#endif
+};
+
+static void sysc_init_revision_quirks(struct sysc *ddata)
+{
+ const struct sysc_revision_quirk *q;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
+ q = &sysc_revision_quirks[i];
+
+ if (q->base && q->base != ddata->module_pa)
+ continue;
+
+ if (q->rev_offset >= 0 &&
+ q->rev_offset != ddata->offsets[SYSC_REVISION])
+ continue;
+
+ if (q->sysc_offset >= 0 &&
+ q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
+ continue;
+
+ if (q->syss_offset >= 0 &&
+ q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
+ continue;
+
+ if (q->revision == ddata->revision ||
+ (q->revision & q->revision_mask) ==
+ (ddata->revision & q->revision_mask)) {
+ ddata->name = q->name;
+ ddata->cfg.quirks |= q->quirks;
+ }
+ }
+}
+
+static int sysc_reset(struct sysc *ddata)
+{
+ int offset = ddata->offsets[SYSC_SYSCONFIG];
+ int val;
+
+ if (ddata->legacy_mode || offset < 0 ||
+ ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+ return 0;
+
+ /*
+ * Currently only support reset status in sysstatus.
+ * Warn and return error in all other cases
+ */
+ if (!ddata->cfg.syss_mask) {
+ dev_err(ddata->dev, "No ti,syss-mask. Reset failed\n");
+ return -EINVAL;
+ }
+
+ val = sysc_read(ddata, offset);
+ val |= (0x1 << ddata->cap->regbits->srst_shift);
+ sysc_write(ddata, offset, val);
+
+ /* Poll on reset status */
+ offset = ddata->offsets[SYSC_SYSSTATUS];
+
+ return readl_poll_timeout(ddata->module_va + offset, val,
+ (val & ddata->cfg.syss_mask) == 0x0,
+ 100, MAX_MODULE_SOFTRESET_WAIT);
+}
+
+/* At this point the module is configured enough to read the revision */
+static int sysc_init_module(struct sysc *ddata)
+{
+ int error;
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE_ON_INIT) {
+ ddata->revision = sysc_read_revision(ddata);
+ goto rev_quirks;
+ }
+
+ error = pm_runtime_get_sync(ddata->dev);
+ if (error < 0) {
+ pm_runtime_put_noidle(ddata->dev);
+
+ return 0;
+ }
+
+ error = sysc_reset(ddata);
+ if (error) {
+ dev_err(ddata->dev, "Reset failed with %d\n", error);
+ pm_runtime_put_sync(ddata->dev);
+
+ return error;
+ }
+
+ ddata->revision = sysc_read_revision(ddata);
+ pm_runtime_put_sync(ddata->dev);
+
+rev_quirks:
+ sysc_init_revision_quirks(ddata);
+
+ return 0;
+}
+
+static int sysc_init_sysc_mask(struct sysc *ddata)
+{
+ struct device_node *np = ddata->dev->of_node;
+ int error;
+ u32 val;
+
+ error = of_property_read_u32(np, "ti,sysc-mask", &val);
+ if (error)
+ return 0;
+
+ if (val)
+ ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
+ else
+ ddata->cfg.sysc_val = ddata->cap->sysc_mask;
+
+ return 0;
+}
+
+static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
+ const char *name)
+{
+ struct device_node *np = ddata->dev->of_node;
+ struct property *prop;
+ const __be32 *p;
+ u32 val;
+
+ of_property_for_each_u32(np, name, prop, p, val) {
+ if (val >= SYSC_NR_IDLEMODES) {
+ dev_err(ddata->dev, "invalid idlemode: %i\n", val);
+ return -EINVAL;
+ }
+ *idlemodes |= (1 << val);
+ }
+
+ return 0;
+}
+
+static int sysc_init_idlemodes(struct sysc *ddata)
+{
+ int error;
+
+ error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
+ "ti,sysc-midle");
+ if (error)
+ return error;
+
+ error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
+ "ti,sysc-sidle");
+ if (error)
+ return error;
+
+ return 0;
+}
+
+/*
+ * Only some devices on omap4 and later have SYSCONFIG reset done
+ * bit. We can detect this if there is no SYSSTATUS at all, or the
+ * SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers
+ * have multiple bits for the child devices like OHCI and EHCI.
+ * Depends on SYSC being parsed first.
+ */
+static int sysc_init_syss_mask(struct sysc *ddata)
+{
+ struct device_node *np = ddata->dev->of_node;
+ int error;
+ u32 val;
+
+ error = of_property_read_u32(np, "ti,syss-mask", &val);
+ if (error) {
+ if ((ddata->cap->type == TI_SYSC_OMAP4 ||
+ ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
+ (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
+ ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
+
+ return 0;
+ }
+
+ if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
+ ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
+
+ ddata->cfg.syss_mask = val;
+
+ return 0;
+}
+
+/*
+ * Many child device drivers need to have fck and opt clocks available
+ * to get the clock rate for device internal configuration etc.
+ */
+static int sysc_child_add_named_clock(struct sysc *ddata,
+ struct device *child,
+ const char *name)
+{
+ struct clk *clk;
+ struct clk_lookup *l;
+ int error = 0;
+
+ if (!name)
+ return 0;
+
+ clk = clk_get(child, name);
+ if (!IS_ERR(clk)) {
+ clk_put(clk);
+
+ return -EEXIST;
+ }
+
+ clk = clk_get(ddata->dev, name);
+ if (IS_ERR(clk))
+ return -ENODEV;
+
+ l = clkdev_create(clk, name, dev_name(child));
+ if (!l)
+ error = -ENOMEM;
+
+ clk_put(clk);
+
+ return error;
+}
+
+static int sysc_child_add_clocks(struct sysc *ddata,
+ struct device *child)
+{
+ int i, error;
+
+ for (i = 0; i < ddata->nr_clocks; i++) {
+ error = sysc_child_add_named_clock(ddata,
+ child,
+ ddata->clock_roles[i]);
+ if (error && error != -EEXIST) {
+ dev_err(ddata->dev, "could not add child clock %s: %i\n",
+ ddata->clock_roles[i], error);
+
+ return error;
+ }
+ }
+
+ return 0;
+}
+
+static struct device_type sysc_device_type = {
+};
+
+static struct sysc *sysc_child_to_parent(struct device *dev)
+{
+ struct device *parent = dev->parent;
+
+ if (!parent || parent->type != &sysc_device_type)
+ return NULL;
+
+ return dev_get_drvdata(parent);
+}
+
+static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = sysc_child_to_parent(dev);
+
+ error = pm_generic_runtime_suspend(dev);
+ if (error)
+ return error;
+
+ if (!ddata->enabled)
+ return 0;
+
+ return sysc_runtime_suspend(ddata->dev);
+}
+
+static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = sysc_child_to_parent(dev);
+
+ if (!ddata->enabled) {
+ error = sysc_runtime_resume(ddata->dev);
+ if (error < 0)
+ dev_err(ddata->dev,
+ "%s error: %i\n", __func__, error);
+ }
+
+ return pm_generic_runtime_resume(dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sysc_child_suspend_noirq(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = sysc_child_to_parent(dev);
+
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ error = pm_generic_suspend_noirq(dev);
+ if (error) {
+ dev_err(dev, "%s error at %i: %i\n",
+ __func__, __LINE__, error);
+
+ return error;
+ }
+
+ if (!pm_runtime_status_suspended(dev)) {
+ error = pm_generic_runtime_suspend(dev);
+ if (error) {
+ dev_warn(dev, "%s busy at %i: %i\n",
+ __func__, __LINE__, error);
+
+ return 0;
+ }
+
+ error = sysc_runtime_suspend(ddata->dev);
+ if (error) {
+ dev_err(dev, "%s error at %i: %i\n",
+ __func__, __LINE__, error);
+
+ return error;
+ }
+
+ ddata->child_needs_resume = true;
+ }
+
+ return 0;
+}
+
+static int sysc_child_resume_noirq(struct device *dev)
+{
+ struct sysc *ddata;
+ int error;
+
+ ddata = sysc_child_to_parent(dev);
+
+ dev_dbg(ddata->dev, "%s %s\n", __func__,
+ ddata->name ? ddata->name : "");
+
+ if (ddata->child_needs_resume) {
+ ddata->child_needs_resume = false;
+
+ error = sysc_runtime_resume(ddata->dev);
+ if (error)
+ dev_err(ddata->dev,
+ "%s runtime resume error: %i\n",
+ __func__, error);
+
+ error = pm_generic_runtime_resume(dev);
+ if (error)
+ dev_err(ddata->dev,
+ "%s generic runtime resume: %i\n",
+ __func__, error);
+ }
+
+ return pm_generic_resume_noirq(dev);
+}
+#endif
+
+struct dev_pm_domain sysc_child_pm_domain = {
+ .ops = {
+ SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
+ sysc_child_runtime_resume,
+ NULL)
+ USE_PLATFORM_PM_SLEEP_OPS
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
+ sysc_child_resume_noirq)
+ }
+};
+
+/**
+ * sysc_legacy_idle_quirk - handle children in omap_device compatible way
+ * @ddata: device driver data
+ * @child: child device driver
+ *
+ * Allow idle for child devices as done with _od_runtime_suspend().
+ * Otherwise many child devices will not idle because of the permanent
+ * parent usecount set in pm_runtime_irq_safe().
+ *
+ * Note that the long term solution is to just modify the child device
+ * drivers to not set pm_runtime_irq_safe() and then this can be just
+ * dropped.
+ */
+static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
+{
+ if (!ddata->legacy_mode)
+ return;
+
+ if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+ dev_pm_domain_set(child, &sysc_child_pm_domain);
+}
+
+static int sysc_notifier_call(struct notifier_block *nb,
+ unsigned long event, void *device)
+{
+ struct device *dev = device;
+ struct sysc *ddata;
+ int error;
+
+ ddata = sysc_child_to_parent(dev);
+ if (!ddata)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ error = sysc_child_add_clocks(ddata, dev);
+ if (error)
+ return error;
+ sysc_legacy_idle_quirk(ddata, dev);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block sysc_nb = {
+ .notifier_call = sysc_notifier_call,
+};
+
+/* Device tree configured quirks */
+struct sysc_dts_quirk {
+ const char *name;
+ u32 mask;
+};
+
+static const struct sysc_dts_quirk sysc_dts_quirks[] = {
+ { .name = "ti,no-idle-on-init",
+ .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
+ { .name = "ti,no-reset-on-init",
+ .mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
+};
+
+static int sysc_init_dts_quirks(struct sysc *ddata)
+{
+ struct device_node *np = ddata->dev->of_node;
+ const struct property *prop;
+ int i, len, error;
+ u32 val;
+
+ ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
+
+ for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
+ prop = of_get_property(np, sysc_dts_quirks[i].name, &len);
+ if (!prop)
+ continue;
+
+ ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
+ }
+
+ error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
+ if (!error) {
+ if (val > 255) {
+ dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
+ val);
+ }
+
+ ddata->cfg.srst_udelay = (u8)val;
+ }
+
+ return 0;
+}
+
+static void sysc_unprepare(struct sysc *ddata)
+{
+ int i;
+
+ for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+ if (!IS_ERR_OR_NULL(ddata->clocks[i]))
+ clk_unprepare(ddata->clocks[i]);
+ }
+}
+
+/*
+ * Common sysc register bits found on omap2, also known as type1
+ */
+static const struct sysc_regbits sysc_regbits_omap2 = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = 12,
+ .sidle_shift = 3,
+ .clkact_shift = 8,
+ .emufree_shift = 5,
+ .enwkup_shift = 2,
+ .srst_shift = 1,
+ .autoidle_shift = 0,
+};
+
+static const struct sysc_capabilities sysc_omap2 = {
+ .type = TI_SYSC_OMAP2,
+ .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
+ SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
+ SYSC_OMAP2_AUTOIDLE,
+ .regbits = &sysc_regbits_omap2,
+};
+
+/* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */
+static const struct sysc_capabilities sysc_omap2_timer = {
+ .type = TI_SYSC_OMAP2_TIMER,
+ .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
+ SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
+ SYSC_OMAP2_AUTOIDLE,
+ .regbits = &sysc_regbits_omap2,
+ .mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
+};
+
+/*
+ * SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2
+ * with different sidle position
+ */
+static const struct sysc_regbits sysc_regbits_omap3_sham = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = 4,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = -ENODEV,
+ .srst_shift = 1,
+ .autoidle_shift = 0,
+ .emufree_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap3_sham = {
+ .type = TI_SYSC_OMAP3_SHAM,
+ .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
+ .regbits = &sysc_regbits_omap3_sham,
+};
+
+/*
+ * AES register bits found on omap3 and later, a variant of
+ * sysc_regbits_omap2 with different sidle position
+ */
+static const struct sysc_regbits sysc_regbits_omap3_aes = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = 6,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = -ENODEV,
+ .srst_shift = 1,
+ .autoidle_shift = 0,
+ .emufree_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap3_aes = {
+ .type = TI_SYSC_OMAP3_AES,
+ .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
+ .regbits = &sysc_regbits_omap3_aes,
+};
+
+/*
+ * Common sysc register bits found on omap4, also known as type2
+ */
+static const struct sysc_regbits sysc_regbits_omap4 = {
+ .dmadisable_shift = 16,
+ .midle_shift = 4,
+ .sidle_shift = 2,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = -ENODEV,
+ .emufree_shift = 1,
+ .srst_shift = 0,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4 = {
+ .type = TI_SYSC_OMAP4,
+ .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
+ SYSC_OMAP4_SOFTRESET,
+ .regbits = &sysc_regbits_omap4,
+};
+
+static const struct sysc_capabilities sysc_omap4_timer = {
+ .type = TI_SYSC_OMAP4_TIMER,
+ .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
+ SYSC_OMAP4_SOFTRESET,
+ .regbits = &sysc_regbits_omap4,
+};
+
+/*
+ * Common sysc register bits found on omap4, also known as type3
+ */
+static const struct sysc_regbits sysc_regbits_omap4_simple = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = 2,
+ .sidle_shift = 0,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = -ENODEV,
+ .srst_shift = -ENODEV,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_simple = {
+ .type = TI_SYSC_OMAP4_SIMPLE,
+ .regbits = &sysc_regbits_omap4_simple,
+};
+
+/*
+ * SmartReflex sysc found on omap34xx
+ */
+static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = -ENODEV,
+ .clkact_shift = 20,
+ .enwkup_shift = -ENODEV,
+ .srst_shift = -ENODEV,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_34xx_sr = {
+ .type = TI_SYSC_OMAP34XX_SR,
+ .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
+ .regbits = &sysc_regbits_omap34xx_sr,
+ .mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
+ SYSC_QUIRK_LEGACY_IDLE,
+};
+
+/*
+ * SmartReflex sysc found on omap36xx and later
+ */
+static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = 24,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = 26,
+ .srst_shift = -ENODEV,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_36xx_sr = {
+ .type = TI_SYSC_OMAP36XX_SR,
+ .sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
+ .regbits = &sysc_regbits_omap36xx_sr,
+ .mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
+};
+
+static const struct sysc_capabilities sysc_omap4_sr = {
+ .type = TI_SYSC_OMAP4_SR,
+ .regbits = &sysc_regbits_omap36xx_sr,
+ .mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
+};
+
+/*
+ * McASP register bits found on omap4 and later
+ */
+static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = 0,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = -ENODEV,
+ .srst_shift = -ENODEV,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_mcasp = {
+ .type = TI_SYSC_OMAP4_MCASP,
+ .regbits = &sysc_regbits_omap4_mcasp,
+};
+
+/*
+ * FS USB host found on omap4 and later
+ */
+static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = 24,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = 26,
+ .srst_shift = -ENODEV,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
+ .type = TI_SYSC_OMAP4_USB_HOST_FS,
+ .sysc_mask = SYSC_OMAP2_ENAWAKEUP,
+ .regbits = &sysc_regbits_omap4_usb_host_fs,
+};
+
+static const struct sysc_regbits sysc_regbits_dra7_mcan = {
+ .dmadisable_shift = -ENODEV,
+ .midle_shift = -ENODEV,
+ .sidle_shift = -ENODEV,
+ .clkact_shift = -ENODEV,
+ .enwkup_shift = 4,
+ .srst_shift = 0,
+ .emufree_shift = -ENODEV,
+ .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_dra7_mcan = {
+ .type = TI_SYSC_DRA7_MCAN,
+ .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
+ .regbits = &sysc_regbits_dra7_mcan,
+};
+
+static int sysc_init_pdata(struct sysc *ddata)
+{
+ struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
+ struct ti_sysc_module_data mdata;
+ int error = 0;
+
+ if (!pdata || !ddata->legacy_mode)
+ return 0;
+
+ mdata.name = ddata->legacy_mode;
+ mdata.module_pa = ddata->module_pa;
+ mdata.module_size = ddata->module_size;
+ mdata.offsets = ddata->offsets;
+ mdata.nr_offsets = SYSC_MAX_REGS;
+ mdata.cap = ddata->cap;
+ mdata.cfg = &ddata->cfg;
+
+ if (!pdata->init_module)
+ return -ENODEV;
+
+ error = pdata->init_module(ddata->dev, &mdata, &ddata->cookie);
+ if (error == -EEXIST)
+ error = 0;
+
+ return error;
+}
+
+static int sysc_init_match(struct sysc *ddata)
+{
+ const struct sysc_capabilities *cap;
+
+ cap = of_device_get_match_data(ddata->dev);
+ if (!cap)
+ return -EINVAL;
+
+ ddata->cap = cap;
+ if (ddata->cap)
+ ddata->cfg.quirks |= ddata->cap->mod_quirks;
+
+ return 0;
+}
+
+static void ti_sysc_idle(struct work_struct *work)
+{
+ struct sysc *ddata;
+
+ ddata = container_of(work, struct sysc, idle_work.work);
+
+ if (pm_runtime_active(ddata->dev))
+ pm_runtime_put_sync(ddata->dev);
+}
+
+static const struct of_device_id sysc_match_table[] = {
+ { .compatible = "simple-bus", },
+ { /* sentinel */ },
+};
+
+static int sysc_probe(struct platform_device *pdev)
+{
+ struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct sysc *ddata;
+ int error;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->dev = &pdev->dev;
+ platform_set_drvdata(pdev, ddata);
+
+ error = sysc_init_match(ddata);
+ if (error)
+ return error;
+
+ error = sysc_init_dts_quirks(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_get_clocks(ddata);
+ if (error)
+ return error;
+
+ error = sysc_map_and_check_registers(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_init_sysc_mask(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_init_idlemodes(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_init_syss_mask(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_init_pdata(ddata);
+ if (error)
+ goto unprepare;
+
+ error = sysc_init_resets(ddata);
+ if (error)
+ return error;
+
+ pm_runtime_enable(ddata->dev);
+ error = sysc_init_module(ddata);
+ if (error)
+ goto unprepare;
+
+ error = pm_runtime_get_sync(ddata->dev);
+ if (error < 0) {
+ pm_runtime_put_noidle(ddata->dev);
+ pm_runtime_disable(ddata->dev);
+ goto unprepare;
+ }
+
+ sysc_show_registers(ddata);
+
+ ddata->dev->type = &sysc_device_type;
+ error = of_platform_populate(ddata->dev->of_node, sysc_match_table,
+ pdata ? pdata->auxdata : NULL,
+ ddata->dev);
+ if (error)
+ goto err;
+
+ INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
+
+ /* At least earlycon won't survive without deferred idle */
+ if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE_ON_INIT |
+ SYSC_QUIRK_NO_RESET_ON_INIT)) {
+ schedule_delayed_work(&ddata->idle_work, 3000);
+ } else {
+ pm_runtime_put(&pdev->dev);
+ }
+
+ if (!of_get_available_child_count(ddata->dev->of_node))
+ reset_control_assert(ddata->rsts);
+
+ return 0;
+
+err:
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+unprepare:
+ sysc_unprepare(ddata);
+
+ return error;
+}
+
+static int sysc_remove(struct platform_device *pdev)
+{
+ struct sysc *ddata = platform_get_drvdata(pdev);
+ int error;
+
+ cancel_delayed_work_sync(&ddata->idle_work);
+
+ error = pm_runtime_get_sync(ddata->dev);
+ if (error < 0) {
+ pm_runtime_put_noidle(ddata->dev);
+ pm_runtime_disable(ddata->dev);
+ goto unprepare;
+ }
+
+ of_platform_depopulate(&pdev->dev);
+
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ reset_control_assert(ddata->rsts);
+
+unprepare:
+ sysc_unprepare(ddata);
+
+ return 0;
+}
+
+static const struct of_device_id sysc_match[] = {
+ { .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
+ { .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
+ { .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
+ { .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
+ { .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
+ { .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
+ { .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
+ { .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
+ { .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
+ { .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
+ { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
+ { .compatible = "ti,sysc-usb-host-fs",
+ .data = &sysc_omap4_usb_host_fs, },
+ { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sysc_match);
+
+static struct platform_driver sysc_driver = {
+ .probe = sysc_probe,
+ .remove = sysc_remove,
+ .driver = {
+ .name = "ti-sysc",
+ .of_match_table = sysc_match,
+ .pm = &sysc_pm_ops,
+ },
+};
+
+static int __init sysc_init(void)
+{
+ bus_register_notifier(&platform_bus_type, &sysc_nb);
+
+ return platform_driver_register(&sysc_driver);
+}
+module_init(sysc_init);
+
+static void __exit sysc_exit(void)
+{
+ bus_unregister_notifier(&platform_bus_type, &sysc_nb);
+ platform_driver_unregister(&sysc_driver);
+}
+module_exit(sysc_exit);
+
+MODULE_DESCRIPTION("TI sysc interconnect target driver");
+MODULE_LICENSE("GPL v2");