Merge tag 'char-misc-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the large set of char/misc driver patches for 5.8-rc1

  Included in here are:

   - habanalabs driver updates, loads

   - mhi bus driver updates

   - extcon driver updates

   - clk driver updates (approved by the clock maintainer)

   - firmware driver updates

   - fpga driver updates

   - gnss driver updates

   - coresight driver updates

   - interconnect driver updates

   - parport driver updates (it's still alive!)

   - nvmem driver updates

   - soundwire driver updates

   - visorbus driver updates

   - w1 driver updates

   - various misc driver updates

  In short, loads of different driver subsystem updates along with the
  drivers as well.

  All have been in linux-next for a while with no reported issues"

* tag 'char-misc-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (233 commits)
  habanalabs: correctly cast u64 to void*
  habanalabs: initialize variable to default value
  extcon: arizona: Fix runtime PM imbalance on error
  extcon: max14577: Add proper dt-compatible strings
  extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()'
  extcon: remove redundant assignment to variable idx
  w1: omap-hdq: print dev_err if irq flags are not cleared
  w1: omap-hdq: fix interrupt handling which did show spurious timeouts
  w1: omap-hdq: fix return value to be -1 if there is a timeout
  w1: omap-hdq: cleanup to add missing newline for some dev_dbg
  /dev/mem: Revoke mappings when a driver claims the region
  misc: xilinx-sdfec: convert get_user_pages() --> pin_user_pages()
  misc: xilinx-sdfec: cleanup return value in xsdfec_table_write()
  misc: xilinx-sdfec: improve get_user_pages_fast() error handling
  nvmem: qfprom: remove incorrect write support
  habanalabs: handle MMU cache invalidation timeout
  habanalabs: don't allow hard reset with open processes
  habanalabs: GAUDI does not support soft-reset
  habanalabs: add print for soft reset due to event
  habanalabs: improve MMU cache invalidation code
  ...

1 files changed, 214 insertions, 0 deletions

diff --git a/drivers/soundwire/sysfs_slave.c b/drivers/soundwire/sysfs_slave.c
new file mode 100644
index 000000000000..f510071b0add
--- /dev/null
+++ b/drivers/soundwire/sysfs_slave.c
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright(c) 2015-2020 Intel Corporation.
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_type.h>
+#include "bus.h"
+#include "sysfs_local.h"
+
+/*
+ * Slave sysfs
+ */
+
+/*
+ * The sysfs for Slave reflects the MIPI description as given
+ * in the MIPI DisCo spec
+ *
+ * Base file is device
+ *	|---- modalias
+ *	|---- dev-properties
+ *		|---- mipi_revision
+ *		|---- wake_capable
+ *		|---- test_mode_capable
+ *		|---- clk_stop_mode1
+ *		|---- simple_clk_stop_capable
+ *		|---- clk_stop_timeout
+ *		|---- ch_prep_timeout
+ *		|---- reset_behave
+ *		|---- high_PHY_capable
+ *		|---- paging_support
+ *		|---- bank_delay_support
+ *		|---- p15_behave
+ *		|---- master_count
+ *		|---- source_ports
+ *		|---- sink_ports
+ *	|---- dp0
+ *		|---- max_word
+ *		|---- min_word
+ *		|---- words
+ *		|---- BRA_flow_controlled
+ *		|---- simple_ch_prep_sm
+ *		|---- imp_def_interrupts
+ *	|---- dpN_<sink/src>
+ *		|---- max_word
+ *		|---- min_word
+ *		|---- words
+ *		|---- type
+ *		|---- max_grouping
+ *		|---- simple_ch_prep_sm
+ *		|---- ch_prep_timeout
+ *		|---- imp_def_interrupts
+ *		|---- min_ch
+ *		|---- max_ch
+ *		|---- channels
+ *		|---- ch_combinations
+ *		|---- max_async_buffer
+ *		|---- block_pack_mode
+ *		|---- port_encoding
+ *
+ */
+
+#define sdw_slave_attr(field, format_string)			\
+static ssize_t field##_show(struct device *dev,			\
+			    struct device_attribute *attr,	\
+			    char *buf)				\
+{								\
+	struct sdw_slave *slave = dev_to_sdw_dev(dev);		\
+	return sprintf(buf, format_string, slave->prop.field);	\
+}								\
+static DEVICE_ATTR_RO(field)
+
+sdw_slave_attr(mipi_revision, "0x%x\n");
+sdw_slave_attr(wake_capable, "%d\n");
+sdw_slave_attr(test_mode_capable, "%d\n");
+sdw_slave_attr(clk_stop_mode1, "%d\n");
+sdw_slave_attr(simple_clk_stop_capable, "%d\n");
+sdw_slave_attr(clk_stop_timeout, "%d\n");
+sdw_slave_attr(ch_prep_timeout, "%d\n");
+sdw_slave_attr(reset_behave, "%d\n");
+sdw_slave_attr(high_PHY_capable, "%d\n");
+sdw_slave_attr(paging_support, "%d\n");
+sdw_slave_attr(bank_delay_support, "%d\n");
+sdw_slave_attr(p15_behave, "%d\n");
+sdw_slave_attr(master_count, "%d\n");
+sdw_slave_attr(source_ports, "0x%x\n");
+sdw_slave_attr(sink_ports, "0x%x\n");
+
+static ssize_t modalias_show(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct sdw_slave *slave = dev_to_sdw_dev(dev);
+
+	return sdw_slave_modalias(slave, buf, 256);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *slave_attrs[] = {
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(slave);
+
+static struct attribute *slave_dev_attrs[] = {
+	&dev_attr_mipi_revision.attr,
+	&dev_attr_wake_capable.attr,
+	&dev_attr_test_mode_capable.attr,
+	&dev_attr_clk_stop_mode1.attr,
+	&dev_attr_simple_clk_stop_capable.attr,
+	&dev_attr_clk_stop_timeout.attr,
+	&dev_attr_ch_prep_timeout.attr,
+	&dev_attr_reset_behave.attr,
+	&dev_attr_high_PHY_capable.attr,
+	&dev_attr_paging_support.attr,
+	&dev_attr_bank_delay_support.attr,
+	&dev_attr_p15_behave.attr,
+	&dev_attr_master_count.attr,
+	&dev_attr_source_ports.attr,
+	&dev_attr_sink_ports.attr,
+	NULL,
+};
+
+/*
+ * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
+ * for device-level properties
+ */
+static struct attribute_group sdw_slave_dev_attr_group = {
+	.attrs	= slave_dev_attrs,
+	.name = "dev-properties",
+};
+
+/*
+ * DP0 sysfs
+ */
+
+#define sdw_dp0_attr(field, format_string)				\
+static ssize_t field##_show(struct device *dev,				\
+			    struct device_attribute *attr,		\
+			    char *buf)					\
+{									\
+	struct sdw_slave *slave = dev_to_sdw_dev(dev);			\
+	return sprintf(buf, format_string, slave->prop.dp0_prop->field);\
+}									\
+static DEVICE_ATTR_RO(field)
+
+sdw_dp0_attr(max_word, "%d\n");
+sdw_dp0_attr(min_word, "%d\n");
+sdw_dp0_attr(BRA_flow_controlled, "%d\n");
+sdw_dp0_attr(simple_ch_prep_sm, "%d\n");
+sdw_dp0_attr(imp_def_interrupts, "0x%x\n");
+
+static ssize_t words_show(struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	struct sdw_slave *slave = dev_to_sdw_dev(dev);
+	ssize_t size = 0;
+	int i;
+
+	for (i = 0; i < slave->prop.dp0_prop->num_words; i++)
+		size += sprintf(buf + size, "%d ",
+				slave->prop.dp0_prop->words[i]);
+	size += sprintf(buf + size, "\n");
+
+	return size;
+}
+static DEVICE_ATTR_RO(words);
+
+static struct attribute *dp0_attrs[] = {
+	&dev_attr_max_word.attr,
+	&dev_attr_min_word.attr,
+	&dev_attr_words.attr,
+	&dev_attr_BRA_flow_controlled.attr,
+	&dev_attr_simple_ch_prep_sm.attr,
+	&dev_attr_imp_def_interrupts.attr,
+	NULL,
+};
+
+/*
+ * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
+ * for dp0-level properties
+ */
+static const struct attribute_group dp0_group = {
+	.attrs = dp0_attrs,
+	.name = "dp0",
+};
+
+int sdw_slave_sysfs_init(struct sdw_slave *slave)
+{
+	int ret;
+
+	ret = devm_device_add_groups(&slave->dev, slave_groups);
+	if (ret < 0)
+		return ret;
+
+	ret = devm_device_add_group(&slave->dev, &sdw_slave_dev_attr_group);
+	if (ret < 0)
+		return ret;
+
+	if (slave->prop.dp0_prop) {
+		ret = devm_device_add_group(&slave->dev, &dp0_group);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (slave->prop.source_ports || slave->prop.sink_ports) {
+		ret = sdw_slave_sysfs_dpn_init(slave);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}