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-rw-r--r--drivers/bus/Kconfig14
-rw-r--r--drivers/bus/Makefile2
-rw-r--r--drivers/bus/brcmstb_gisb.c7
-rw-r--r--drivers/bus/fsl-mc/Makefile3
-rw-r--r--drivers/bus/fsl-mc/fsl-mc-private.h39
-rw-r--r--drivers/bus/fsl-mc/obj-api.c103
-rw-r--r--drivers/bus/simple-pm-bus.c42
-rw-r--r--drivers/bus/sun50i-de2.c7
-rw-r--r--drivers/bus/ti-sysc.c280
9 files changed, 435 insertions, 62 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index a5b96f3aad67..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
@@ -152,18 +152,6 @@ config QCOM_EBI2
Interface 2, which can be used to connect things like NAND Flash,
SRAM, ethernet adapters, FPGAs and LCD displays.
-config SIMPLE_PM_BUS
- tristate "Simple Power-Managed Bus Driver"
- depends on OF && PM
- help
- Driver for transparent busses that don't need a real driver, but
- where the bus controller is part of a PM domain, or under the control
- of a functional clock, and thus relies on runtime PM for managing
- this PM domain and/or clock.
- An example of such a bus controller is the Renesas Bus State
- Controller (BSC, sometimes called "LBSC within Bus Bridge", or
- "External Bus Interface") as found on several Renesas ARM SoCs.
-
config SUN50I_DE2_BUS
bool "Allwinner A64 DE2 Bus Driver"
default ARM64
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index 1c29c5e8ffb8..52c2f35a26a9 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o
obj-$(CONFIG_QCOM_EBI2) += qcom-ebi2.o
obj-$(CONFIG_SUN50I_DE2_BUS) += sun50i-de2.o
obj-$(CONFIG_SUNXI_RSB) += sunxi-rsb.o
-obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o
+obj-$(CONFIG_OF) += simple-pm-bus.o
obj-$(CONFIG_TEGRA_ACONNECT) += tegra-aconnect.o
obj-$(CONFIG_TEGRA_GMI) += tegra-gmi.o
obj-$(CONFIG_TI_PWMSS) += ti-pwmss.o
diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
index 6cc965324cc5..183d5cc37d42 100644
--- a/drivers/bus/brcmstb_gisb.c
+++ b/drivers/bus/brcmstb_gisb.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright (C) 2014-2017 Broadcom
+ * Copyright (C) 2014-2021 Broadcom
*/
#include <linux/init.h>
@@ -536,6 +536,7 @@ static struct platform_driver brcmstb_gisb_arb_driver = {
.name = "brcm-gisb-arb",
.of_match_table = brcmstb_gisb_arb_of_match,
.pm = &brcmstb_gisb_arb_pm_ops,
+ .suppress_bind_attrs = true,
},
};
@@ -546,3 +547,7 @@ static int __init brcm_gisb_driver_init(void)
}
module_init(brcm_gisb_driver_init);
+
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("Broadcom STB GISB arbiter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile
index 4ae292a30e53..892946245527 100644
--- a/drivers/bus/fsl-mc/Makefile
+++ b/drivers/bus/fsl-mc/Makefile
@@ -15,7 +15,8 @@ mc-bus-driver-objs := fsl-mc-bus.o \
dprc-driver.o \
fsl-mc-allocator.o \
fsl-mc-msi.o \
- dpmcp.o
+ dpmcp.o \
+ obj-api.o
# MC userspace support
obj-$(CONFIG_FSL_MC_UAPI_SUPPORT) += fsl-mc-uapi.o
diff --git a/drivers/bus/fsl-mc/fsl-mc-private.h b/drivers/bus/fsl-mc/fsl-mc-private.h
index 1958fa065360..b3520ea1b9f4 100644
--- a/drivers/bus/fsl-mc/fsl-mc-private.h
+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
@@ -48,7 +48,6 @@ struct dpmng_rsp_get_version {
/* DPMCP command IDs */
#define DPMCP_CMDID_CLOSE DPMCP_CMD(0x800)
-#define DPMCP_CMDID_OPEN DPMCP_CMD(0x80b)
#define DPMCP_CMDID_RESET DPMCP_CMD(0x005)
struct dpmcp_cmd_open {
@@ -91,7 +90,6 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
/* DPRC command IDs */
#define DPRC_CMDID_CLOSE DPRC_CMD(0x800)
-#define DPRC_CMDID_OPEN DPRC_CMD(0x805)
#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)
#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
@@ -453,7 +451,6 @@ int dprc_get_connection(struct fsl_mc_io *mc_io,
/* Command IDs */
#define DPBP_CMDID_CLOSE DPBP_CMD(0x800)
-#define DPBP_CMDID_OPEN DPBP_CMD(0x804)
#define DPBP_CMDID_ENABLE DPBP_CMD(0x002)
#define DPBP_CMDID_DISABLE DPBP_CMD(0x003)
@@ -492,7 +489,6 @@ struct dpbp_rsp_get_attributes {
/* Command IDs */
#define DPCON_CMDID_CLOSE DPCON_CMD(0x800)
-#define DPCON_CMDID_OPEN DPCON_CMD(0x808)
#define DPCON_CMDID_ENABLE DPCON_CMD(0x002)
#define DPCON_CMDID_DISABLE DPCON_CMD(0x003)
@@ -524,6 +520,41 @@ struct dpcon_cmd_set_notification {
__le64 user_ctx;
};
+/*
+ * Generic FSL MC API
+ */
+
+/* generic command versioning */
+#define OBJ_CMD_BASE_VERSION 1
+#define OBJ_CMD_ID_OFFSET 4
+
+#define OBJ_CMD(id) (((id) << OBJ_CMD_ID_OFFSET) | OBJ_CMD_BASE_VERSION)
+
+/* open command codes */
+#define DPRTC_CMDID_OPEN OBJ_CMD(0x810)
+#define DPNI_CMDID_OPEN OBJ_CMD(0x801)
+#define DPSW_CMDID_OPEN OBJ_CMD(0x802)
+#define DPIO_CMDID_OPEN OBJ_CMD(0x803)
+#define DPBP_CMDID_OPEN OBJ_CMD(0x804)
+#define DPRC_CMDID_OPEN OBJ_CMD(0x805)
+#define DPDMUX_CMDID_OPEN OBJ_CMD(0x806)
+#define DPCI_CMDID_OPEN OBJ_CMD(0x807)
+#define DPCON_CMDID_OPEN OBJ_CMD(0x808)
+#define DPSECI_CMDID_OPEN OBJ_CMD(0x809)
+#define DPAIOP_CMDID_OPEN OBJ_CMD(0x80a)
+#define DPMCP_CMDID_OPEN OBJ_CMD(0x80b)
+#define DPMAC_CMDID_OPEN OBJ_CMD(0x80c)
+#define DPDCEI_CMDID_OPEN OBJ_CMD(0x80d)
+#define DPDMAI_CMDID_OPEN OBJ_CMD(0x80e)
+#define DPDBG_CMDID_OPEN OBJ_CMD(0x80f)
+
+/* Generic object command IDs */
+#define OBJ_CMDID_CLOSE OBJ_CMD(0x800)
+#define OBJ_CMDID_RESET OBJ_CMD(0x005)
+
+struct fsl_mc_obj_cmd_open {
+ __le32 obj_id;
+};
/**
* struct fsl_mc_resource_pool - Pool of MC resources of a given
diff --git a/drivers/bus/fsl-mc/obj-api.c b/drivers/bus/fsl-mc/obj-api.c
new file mode 100644
index 000000000000..06c1dd84e38d
--- /dev/null
+++ b/drivers/bus/fsl-mc/obj-api.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2021 NXP
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+static int fsl_mc_get_open_cmd_id(const char *type)
+{
+ static const struct {
+ int cmd_id;
+ const char *type;
+ } dev_ids[] = {
+ { DPRTC_CMDID_OPEN, "dprtc" },
+ { DPRC_CMDID_OPEN, "dprc" },
+ { DPNI_CMDID_OPEN, "dpni" },
+ { DPIO_CMDID_OPEN, "dpio" },
+ { DPSW_CMDID_OPEN, "dpsw" },
+ { DPBP_CMDID_OPEN, "dpbp" },
+ { DPCON_CMDID_OPEN, "dpcon" },
+ { DPMCP_CMDID_OPEN, "dpmcp" },
+ { DPMAC_CMDID_OPEN, "dpmac" },
+ { DPSECI_CMDID_OPEN, "dpseci" },
+ { DPDMUX_CMDID_OPEN, "dpdmux" },
+ { DPDCEI_CMDID_OPEN, "dpdcei" },
+ { DPAIOP_CMDID_OPEN, "dpaiop" },
+ { DPCI_CMDID_OPEN, "dpci" },
+ { DPDMAI_CMDID_OPEN, "dpdmai" },
+ { DPDBG_CMDID_OPEN, "dpdbg" },
+ { 0, NULL }
+ };
+ int i;
+
+ for (i = 0; dev_ids[i].type; i++)
+ if (!strcmp(dev_ids[i].type, type))
+ return dev_ids[i].cmd_id;
+
+ return -1;
+}
+
+int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ int obj_id,
+ char *obj_type,
+ u16 *token)
+{
+ struct fsl_mc_command cmd = { 0 };
+ struct fsl_mc_obj_cmd_open *cmd_params;
+ int err = 0;
+ int cmd_id = fsl_mc_get_open_cmd_id(obj_type);
+
+ if (cmd_id == -1)
+ return -ENODEV;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(cmd_id, cmd_flags, 0);
+ cmd_params = (struct fsl_mc_obj_cmd_open *)cmd.params;
+ cmd_params->obj_id = cpu_to_le32(obj_id);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ *token = mc_cmd_hdr_read_token(&cmd);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_open);
+
+int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token)
+{
+ struct fsl_mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(OBJ_CMDID_CLOSE, cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_close);
+
+int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token)
+{
+ struct fsl_mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(OBJ_CMDID_RESET, cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_reset);
diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
index 01a3d0cd08ed..6b8d6257ed8a 100644
--- a/drivers/bus/simple-pm-bus.c
+++ b/drivers/bus/simple-pm-bus.c
@@ -13,11 +13,36 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
-
static int simple_pm_bus_probe(struct platform_device *pdev)
{
- const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev);
- struct device_node *np = pdev->dev.of_node;
+ const struct device *dev = &pdev->dev;
+ const struct of_dev_auxdata *lookup = dev_get_platdata(dev);
+ struct device_node *np = dev->of_node;
+ const struct of_device_id *match;
+
+ /*
+ * Allow user to use driver_override to bind this driver to a
+ * transparent bus device which has a different compatible string
+ * that's not listed in simple_pm_bus_of_match. We don't want to do any
+ * of the simple-pm-bus tasks for these devices, so return early.
+ */
+ if (pdev->driver_override)
+ return 0;
+
+ match = of_match_device(dev->driver->of_match_table, dev);
+ /*
+ * These are transparent bus devices (not simple-pm-bus matches) that
+ * have their child nodes populated automatically. So, don't need to
+ * do anything more. We only match with the device if this driver is
+ * the most specific match because we don't want to incorrectly bind to
+ * a device that has a more specific driver.
+ */
+ if (match && match->data) {
+ if (of_property_match_string(np, "compatible", match->compatible) == 0)
+ return 0;
+ else
+ return -ENODEV;
+ }
dev_dbg(&pdev->dev, "%s\n", __func__);
@@ -31,14 +56,25 @@ static int simple_pm_bus_probe(struct platform_device *pdev)
static int simple_pm_bus_remove(struct platform_device *pdev)
{
+ const void *data = of_device_get_match_data(&pdev->dev);
+
+ if (pdev->driver_override || data)
+ return 0;
+
dev_dbg(&pdev->dev, "%s\n", __func__);
pm_runtime_disable(&pdev->dev);
return 0;
}
+#define ONLY_BUS ((void *) 1) /* Match if the device is only a bus. */
+
static const struct of_device_id simple_pm_bus_of_match[] = {
{ .compatible = "simple-pm-bus", },
+ { .compatible = "simple-bus", .data = ONLY_BUS },
+ { .compatible = "simple-mfd", .data = ONLY_BUS },
+ { .compatible = "isa", .data = ONLY_BUS },
+ { .compatible = "arm,amba-bus", .data = ONLY_BUS },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, simple_pm_bus_of_match);
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 a51c2a8feed9..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;
+ }
- } else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
+ 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);
+
+ 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;
sysc_write_sysconfig(ddata, reg);
- /* Flush posted write */
- sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
+ ret = 0;
- return 0;
+save_context:
+ /* Save context and flush posted write */
+ ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
+
+ return ret;
}
static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
@@ -1336,13 +1397,40 @@ err_allow_idle:
return error;
}
+/*
+ * Checks if device context was lost. Assumes the sysconfig register value
+ * after lost context is different from the configured value. Only works for
+ * enabled devices.
+ *
+ * Eventually we may want to also add support to using the context lost
+ * registers that some SoCs have.
+ */
+static int sysc_check_context(struct sysc *ddata)
+{
+ u32 reg;
+
+ if (!ddata->enabled)
+ return -ENODATA;
+
+ reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
+ if (reg == ddata->sysconfig)
+ return 0;
+
+ return -EACCES;
+}
+
static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled)
{
struct device *dev = ddata->dev;
int error;
- /* Disable target module if it is enabled */
if (ddata->enabled) {
+ /* Nothing to do if enabled and context not lost */
+ error = sysc_check_context(ddata);
+ if (!error)
+ return 0;
+
+ /* Disable target module if it is enabled */
error = sysc_runtime_suspend(dev);
if (error)
dev_warn(dev, "reinit suspend failed: %i\n", error);
@@ -1353,6 +1441,15 @@ static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled)
if (error)
dev_warn(dev, "reinit resume failed: %i\n", error);
+ /* Some modules like am335x gpmc need reset and restore of sysconfig */
+ if (ddata->cfg.quirks & SYSC_QUIRK_RESET_ON_CTX_LOST) {
+ error = sysc_reset(ddata);
+ if (error)
+ dev_warn(dev, "reinit reset failed: %i\n", error);
+
+ sysc_write_sysconfig(ddata, ddata->sysconfig);
+ }
+
if (leave_enabled)
return error;
@@ -1442,10 +1539,6 @@ struct sysc_revision_quirk {
static const struct sysc_revision_quirk sysc_revision_quirks[] = {
/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
- SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
- SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
- SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
- SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
@@ -1464,6 +1557,9 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
/* Quirks that need to be set based on detected module */
SYSC_QUIRK("aess", 0, 0, 0x10, -ENODEV, 0x40000000, 0xffffffff,
SYSC_MODULE_QUIRK_AESS),
+ /* Errata i893 handling for dra7 dcan1 and 2 */
+ SYSC_QUIRK("dcan", 0x4ae3c000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
+ SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
@@ -1476,7 +1572,10 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
SYSC_QUIRK_CLKDM_NOAUTO),
+ SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
+ SYSC_QUIRK_OPT_CLKS_IN_RESET),
SYSC_QUIRK("gpmc", 0, 0, 0x10, 0x14, 0x00000060, 0xffffffff,
+ SYSC_QUIRK_REINIT_ON_CTX_LOST | SYSC_QUIRK_RESET_ON_CTX_LOST |
SYSC_QUIRK_GPMC_DEBUG),
SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50030200, 0xffffffff,
SYSC_QUIRK_OPT_CLKS_NEEDED),
@@ -1512,10 +1611,11 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
- 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
+ 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
+ SYSC_MODULE_QUIRK_OTG),
SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -ENODEV, 0x4ea2080d, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
- SYSC_QUIRK_REINIT_ON_RESUME),
+ SYSC_QUIRK_REINIT_ON_CTX_LOST),
SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
SYSC_MODULE_QUIRK_WDT),
/* PRUSS on am3, am4 and am5 */
@@ -1580,6 +1680,7 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("sdio", 0, 0, 0x10, -ENODEV, 0x40202301, 0xffff0ff0, 0),
SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0),
SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
+ SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40000902, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40002903, 0xffffffff, 0),
SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x24, -ENODEV, 0x00000000, 0xffffffff, 0),
@@ -1871,6 +1972,22 @@ static void sysc_module_lock_quirk_rtc(struct sysc *ddata)
sysc_quirk_rtc(ddata, true);
}
+/* OTG omap2430 glue layer up to omap4 needs OTG_FORCESTDBY configured */
+static void sysc_module_enable_quirk_otg(struct sysc *ddata)
+{
+ int offset = 0x414; /* OTG_FORCESTDBY */
+
+ sysc_write(ddata, offset, 0);
+}
+
+static void sysc_module_disable_quirk_otg(struct sysc *ddata)
+{
+ int offset = 0x414; /* OTG_FORCESTDBY */
+ u32 val = BIT(0); /* ENABLEFORCE */
+
+ sysc_write(ddata, offset, val);
+}
+
/* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */
static void sysc_module_enable_quirk_sgx(struct sysc *ddata)
{
@@ -1953,6 +2070,11 @@ static void sysc_init_module_quirks(struct sysc *ddata)
return;
}
+ if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_OTG) {
+ ddata->module_enable_quirk = sysc_module_enable_quirk_otg;
+ ddata->module_disable_quirk = sysc_module_disable_quirk_otg;
+ }
+
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
@@ -2398,6 +2520,78 @@ static struct dev_pm_domain sysc_child_pm_domain = {
}
};
+/* Caller needs to take list_lock if ever used outside of cpu_pm */
+static void sysc_reinit_modules(struct sysc_soc_info *soc)
+{
+ struct sysc_module *module;
+ struct list_head *pos;
+ struct sysc *ddata;
+
+ list_for_each(pos, &sysc_soc->restored_modules) {
+ module = list_entry(pos, struct sysc_module, node);
+ ddata = module->ddata;
+ sysc_reinit_module(ddata, ddata->enabled);
+ }
+}
+
+/**
+ * sysc_context_notifier - optionally reset and restore module after idle
+ * @nb: notifier block
+ * @cmd: unused
+ * @v: unused
+ *
+ * Some interconnect target modules need to be restored, or reset and restored
+ * on CPU_PM CPU_PM_CLUSTER_EXIT notifier. This is needed at least for am335x
+ * OTG and GPMC target modules even if the modules are unused.
+ */
+static int sysc_context_notifier(struct notifier_block *nb, unsigned long cmd,
+ void *v)
+{
+ struct sysc_soc_info *soc;
+
+ soc = container_of(nb, struct sysc_soc_info, nb);
+
+ switch (cmd) {
+ case CPU_CLUSTER_PM_ENTER:
+ break;
+ case CPU_CLUSTER_PM_ENTER_FAILED: /* No need to restore context */
+ break;
+ case CPU_CLUSTER_PM_EXIT:
+ sysc_reinit_modules(soc);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+/**
+ * sysc_add_restored - optionally add reset and restore quirk hanlling
+ * @ddata: device data
+ */
+static void sysc_add_restored(struct sysc *ddata)
+{
+ struct sysc_module *restored_module;
+
+ restored_module = kzalloc(sizeof(*restored_module), GFP_KERNEL);
+ if (!restored_module)
+ return;
+
+ restored_module->ddata = ddata;
+
+ mutex_lock(&sysc_soc->list_lock);
+
+ list_add(&restored_module->node, &sysc_soc->restored_modules);
+
+ if (sysc_soc->nb.notifier_call)
+ goto out_unlock;
+
+ sysc_soc->nb.notifier_call = sysc_context_notifier;
+ cpu_pm_register_notifier(&sysc_soc->nb);
+
+out_unlock:
+ mutex_unlock(&sysc_soc->list_lock);
+}
+
/**
* sysc_legacy_idle_quirk - handle children in omap_device compatible way
* @ddata: device driver data
@@ -2897,12 +3091,14 @@ static int sysc_add_disabled(unsigned long base)
}
/*
- * One time init to detect the booted SoC and disable unavailable features.
+ * One time init to detect the booted SoC, disable unavailable features
+ * and initialize list for optional cpu_pm notifier.
+ *
* Note that we initialize static data shared across all ti-sysc instances
* so ddata is only used for SoC type. This can be called from module_init
* once we no longer need to rely on platform data.
*/
-static int sysc_init_soc(struct sysc *ddata)
+static int sysc_init_static_data(struct sysc *ddata)
{
const struct soc_device_attribute *match;
struct ti_sysc_platform_data *pdata;
@@ -2918,6 +3114,7 @@ static int sysc_init_soc(struct sysc *ddata)
mutex_init(&sysc_soc->list_lock);
INIT_LIST_HEAD(&sysc_soc->disabled_modules);
+ INIT_LIST_HEAD(&sysc_soc->restored_modules);
sysc_soc->general_purpose = true;
pdata = dev_get_platdata(ddata->dev);
@@ -2954,6 +3151,7 @@ static int sysc_init_soc(struct sysc *ddata)
break;
case SOC_AM3:
sysc_add_disabled(0x48310000); /* rng */
+ break;
default:
break;
}
@@ -2981,15 +3179,24 @@ static int sysc_init_soc(struct sysc *ddata)
return 0;
}
-static void sysc_cleanup_soc(void)
+static void sysc_cleanup_static_data(void)
{
+ struct sysc_module *restored_module;
struct sysc_address *disabled_module;
struct list_head *pos, *tmp;
if (!sysc_soc)
return;
+ if (sysc_soc->nb.notifier_call)
+ cpu_pm_unregister_notifier(&sysc_soc->nb);
+
mutex_lock(&sysc_soc->list_lock);
+ list_for_each_safe(pos, tmp, &sysc_soc->restored_modules) {
+ restored_module = list_entry(pos, struct sysc_module, node);
+ list_del(pos);
+ kfree(restored_module);
+ }
list_for_each_safe(pos, tmp, &sysc_soc->disabled_modules) {
disabled_module = list_entry(pos, struct sysc_address, node);
list_del(pos);
@@ -3057,7 +3264,7 @@ static int sysc_probe(struct platform_device *pdev)
ddata->dev = &pdev->dev;
platform_set_drvdata(pdev, ddata);
- error = sysc_init_soc(ddata);
+ error = sysc_init_static_data(ddata);
if (error)
return error;
@@ -3155,6 +3362,9 @@ static int sysc_probe(struct platform_device *pdev)
pm_runtime_put(&pdev->dev);
}
+ if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_CTX_LOST)
+ sysc_add_restored(ddata);
+
return 0;
err:
@@ -3236,7 +3446,7 @@ static void __exit sysc_exit(void)
{
bus_unregister_notifier(&platform_bus_type, &sysc_nb);
platform_driver_unregister(&sysc_driver);
- sysc_cleanup_soc();
+ sysc_cleanup_static_data();
}
module_exit(sysc_exit);
generated by cgit (git 2.34.1) at 2024-05-30 19:21:58 +0000