Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 745 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/cxd2820r_core.c b/drivers/media/dvb-frontends/cxd2820r_core.c
new file mode 100644
index 000000000..47aa40967
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2820r_core.c
@@ -0,0 +1,745 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
+ */
+
+
+#include "cxd2820r_priv.h"
+
+/* Write register table */
+int cxd2820r_wr_reg_val_mask_tab(struct cxd2820r_priv *priv,
+				 const struct reg_val_mask *tab, int tab_len)
+{
+	struct i2c_client *client = priv->client[0];
+	int ret;
+	unsigned int i, reg, mask, val;
+	struct regmap *regmap;
+
+	dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
+
+	for (i = 0; i < tab_len; i++) {
+		if ((tab[i].reg >> 16) & 0x1)
+			regmap = priv->regmap[1];
+		else
+			regmap = priv->regmap[0];
+
+		reg = (tab[i].reg >> 0) & 0xffff;
+		val = tab[i].val;
+		mask = tab[i].mask;
+
+		if (mask == 0xff)
+			ret = regmap_write(regmap, reg, val);
+		else
+			ret = regmap_write_bits(regmap, reg, mask, val);
+		if (ret)
+			goto error;
+	}
+
+	return 0;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret, i;
+	u8 tmp0, tmp1;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	/* update GPIOs only when needed */
+	if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
+		return 0;
+
+	tmp0 = 0x00;
+	tmp1 = 0x00;
+	for (i = 0; i < sizeof(priv->gpio); i++) {
+		/* enable / disable */
+		if (gpio[i] & CXD2820R_GPIO_E)
+			tmp0 |= (2 << 6) >> (2 * i);
+		else
+			tmp0 |= (1 << 6) >> (2 * i);
+
+		/* input / output */
+		if (gpio[i] & CXD2820R_GPIO_I)
+			tmp1 |= (1 << (3 + i));
+		else
+			tmp1 |= (0 << (3 + i));
+
+		/* high / low */
+		if (gpio[i] & CXD2820R_GPIO_H)
+			tmp1 |= (1 << (0 + i));
+		else
+			tmp1 |= (0 << (0 + i));
+
+		dev_dbg(&client->dev, "gpio i=%d %02x %02x\n", i, tmp0, tmp1);
+	}
+
+	dev_dbg(&client->dev, "wr gpio=%02x %02x\n", tmp0, tmp1);
+
+	/* write bits [7:2] */
+	ret = regmap_update_bits(priv->regmap[0], 0x0089, 0xfc, tmp0);
+	if (ret)
+		goto error;
+
+	/* write bits [5:0] */
+	ret = regmap_update_bits(priv->regmap[0], 0x008e, 0x3f, tmp1);
+	if (ret)
+		goto error;
+
+	memcpy(priv->gpio, gpio, sizeof(priv->gpio));
+
+	return ret;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int cxd2820r_set_frontend(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2820r_init_t(fe);
+		if (ret < 0)
+			goto err;
+		ret = cxd2820r_set_frontend_t(fe);
+		if (ret < 0)
+			goto err;
+		break;
+	case SYS_DVBT2:
+		ret = cxd2820r_init_t(fe);
+		if (ret < 0)
+			goto err;
+		ret = cxd2820r_set_frontend_t2(fe);
+		if (ret < 0)
+			goto err;
+		break;
+	case SYS_DVBC_ANNEX_A:
+		ret = cxd2820r_init_c(fe);
+		if (ret < 0)
+			goto err;
+		ret = cxd2820r_set_frontend_c(fe);
+		if (ret < 0)
+			goto err;
+		break;
+	default:
+		dev_dbg(&client->dev, "invalid delivery_system\n");
+		ret = -EINVAL;
+		break;
+	}
+err:
+	return ret;
+}
+
+static int cxd2820r_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2820r_read_status_t(fe, status);
+		break;
+	case SYS_DVBT2:
+		ret = cxd2820r_read_status_t2(fe, status);
+		break;
+	case SYS_DVBC_ANNEX_A:
+		ret = cxd2820r_read_status_c(fe, status);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int cxd2820r_get_frontend(struct dvb_frontend *fe,
+				 struct dtv_frontend_properties *p)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	if (priv->delivery_system == SYS_UNDEFINED)
+		return 0;
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2820r_get_frontend_t(fe, p);
+		break;
+	case SYS_DVBT2:
+		ret = cxd2820r_get_frontend_t2(fe, p);
+		break;
+	case SYS_DVBC_ANNEX_A:
+		ret = cxd2820r_get_frontend_c(fe, p);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	*ber = (priv->post_bit_error - priv->post_bit_error_prev_dvbv3);
+	priv->post_bit_error_prev_dvbv3 = priv->post_bit_error;
+
+	return 0;
+}
+
+static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
+		*strength = c->strength.stat[0].uvalue;
+	else
+		*strength = 0;
+
+	return 0;
+}
+
+static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
+		*snr = div_s64(c->cnr.stat[0].svalue, 100);
+	else
+		*snr = 0;
+
+	return 0;
+}
+
+static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	*ucblocks = 0;
+
+	return 0;
+}
+
+static int cxd2820r_init(struct dvb_frontend *fe)
+{
+	return 0;
+}
+
+static int cxd2820r_sleep(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2820r_sleep_t(fe);
+		break;
+	case SYS_DVBT2:
+		ret = cxd2820r_sleep_t2(fe);
+		break;
+	case SYS_DVBC_ANNEX_A:
+		ret = cxd2820r_sleep_c(fe);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
+				      struct dvb_frontend_tune_settings *s)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	switch (c->delivery_system) {
+	case SYS_DVBT:
+		ret = cxd2820r_get_tune_settings_t(fe, s);
+		break;
+	case SYS_DVBT2:
+		ret = cxd2820r_get_tune_settings_t2(fe, s);
+		break;
+	case SYS_DVBC_ANNEX_A:
+		ret = cxd2820r_get_tune_settings_c(fe, s);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret, i;
+	enum fe_status status = 0;
+
+	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
+
+	/* switch between DVB-T and DVB-T2 when tune fails */
+	if (priv->last_tune_failed) {
+		if (priv->delivery_system == SYS_DVBT) {
+			ret = cxd2820r_sleep_t(fe);
+			if (ret)
+				goto error;
+
+			c->delivery_system = SYS_DVBT2;
+		} else if (priv->delivery_system == SYS_DVBT2) {
+			ret = cxd2820r_sleep_t2(fe);
+			if (ret)
+				goto error;
+
+			c->delivery_system = SYS_DVBT;
+		}
+	}
+
+	/* set frontend */
+	ret = cxd2820r_set_frontend(fe);
+	if (ret)
+		goto error;
+
+	/* frontend lock wait loop count */
+	switch (priv->delivery_system) {
+	case SYS_DVBT:
+	case SYS_DVBC_ANNEX_A:
+		i = 20;
+		break;
+	case SYS_DVBT2:
+		i = 40;
+		break;
+	case SYS_UNDEFINED:
+	default:
+		i = 0;
+		break;
+	}
+
+	/* wait frontend lock */
+	for (; i > 0; i--) {
+		dev_dbg(&client->dev, "loop=%d\n", i);
+		msleep(50);
+		ret = cxd2820r_read_status(fe, &status);
+		if (ret)
+			goto error;
+
+		if (status & FE_HAS_LOCK)
+			break;
+	}
+
+	/* check if we have a valid signal */
+	if (status & FE_HAS_LOCK) {
+		priv->last_tune_failed = false;
+		return DVBFE_ALGO_SEARCH_SUCCESS;
+	} else {
+		priv->last_tune_failed = true;
+		return DVBFE_ALGO_SEARCH_AGAIN;
+	}
+
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return DVBFE_ALGO_SEARCH_ERROR;
+}
+
+static enum dvbfe_algo cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
+{
+	return DVBFE_ALGO_CUSTOM;
+}
+
+static void cxd2820r_release(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+
+	dev_dbg(&client->dev, "\n");
+
+	i2c_unregister_device(client);
+
+	return;
+}
+
+static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+
+	dev_dbg_ratelimited(&client->dev, "enable=%d\n", enable);
+
+	return regmap_update_bits(priv->regmap[0], 0x00db, 0x01, enable ? 1 : 0);
+}
+
+#ifdef CONFIG_GPIOLIB
+static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
+		int val)
+{
+	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
+	struct i2c_client *client = priv->client[0];
+	u8 gpio[GPIO_COUNT];
+
+	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
+
+	memcpy(gpio, priv->gpio, sizeof(gpio));
+	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
+
+	return cxd2820r_gpio(&priv->fe, gpio);
+}
+
+static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
+{
+	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
+	struct i2c_client *client = priv->client[0];
+	u8 gpio[GPIO_COUNT];
+
+	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
+
+	memcpy(gpio, priv->gpio, sizeof(gpio));
+	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
+
+	(void) cxd2820r_gpio(&priv->fe, gpio);
+
+	return;
+}
+
+static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
+{
+	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
+	struct i2c_client *client = priv->client[0];
+
+	dev_dbg(&client->dev, "nr=%u\n", nr);
+
+	return (priv->gpio[nr] >> 2) & 0x01;
+}
+#endif
+
+static const struct dvb_frontend_ops cxd2820r_ops = {
+	.delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
+	/* default: DVB-T/T2 */
+	.info = {
+		.name = "Sony CXD2820R",
+
+		.caps =	FE_CAN_FEC_1_2			|
+			FE_CAN_FEC_2_3			|
+			FE_CAN_FEC_3_4			|
+			FE_CAN_FEC_5_6			|
+			FE_CAN_FEC_7_8			|
+			FE_CAN_FEC_AUTO			|
+			FE_CAN_QPSK			|
+			FE_CAN_QAM_16			|
+			FE_CAN_QAM_32			|
+			FE_CAN_QAM_64			|
+			FE_CAN_QAM_128			|
+			FE_CAN_QAM_256			|
+			FE_CAN_QAM_AUTO			|
+			FE_CAN_TRANSMISSION_MODE_AUTO	|
+			FE_CAN_GUARD_INTERVAL_AUTO	|
+			FE_CAN_HIERARCHY_AUTO		|
+			FE_CAN_MUTE_TS			|
+			FE_CAN_2G_MODULATION		|
+			FE_CAN_MULTISTREAM
+		},
+
+	.release		= cxd2820r_release,
+	.init			= cxd2820r_init,
+	.sleep			= cxd2820r_sleep,
+
+	.get_tune_settings	= cxd2820r_get_tune_settings,
+	.i2c_gate_ctrl		= cxd2820r_i2c_gate_ctrl,
+
+	.get_frontend		= cxd2820r_get_frontend,
+
+	.get_frontend_algo	= cxd2820r_get_frontend_algo,
+	.search			= cxd2820r_search,
+
+	.read_status		= cxd2820r_read_status,
+	.read_snr		= cxd2820r_read_snr,
+	.read_ber		= cxd2820r_read_ber,
+	.read_ucblocks		= cxd2820r_read_ucblocks,
+	.read_signal_strength	= cxd2820r_read_signal_strength,
+};
+
+/*
+ * XXX: That is wrapper to cxd2820r_probe() via driver core in order to provide
+ * proper I2C client for legacy media attach binding.
+ * New users must use I2C client binding directly!
+ */
+struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *config,
+				     struct i2c_adapter *adapter,
+				     int *gpio_chip_base)
+{
+	struct i2c_client *client;
+	struct i2c_board_info board_info;
+	struct cxd2820r_platform_data pdata;
+
+	pdata.ts_mode = config->ts_mode;
+	pdata.ts_clk_inv = config->ts_clock_inv;
+	pdata.if_agc_polarity = config->if_agc_polarity;
+	pdata.spec_inv = config->spec_inv;
+	pdata.gpio_chip_base = &gpio_chip_base;
+	pdata.attach_in_use = true;
+
+	memset(&board_info, 0, sizeof(board_info));
+	strscpy(board_info.type, "cxd2820r", I2C_NAME_SIZE);
+	board_info.addr = config->i2c_address;
+	board_info.platform_data = &pdata;
+	client = i2c_new_client_device(adapter, &board_info);
+	if (!i2c_client_has_driver(client))
+		return NULL;
+
+	return pdata.get_dvb_frontend(client);
+}
+EXPORT_SYMBOL(cxd2820r_attach);
+
+static struct dvb_frontend *cxd2820r_get_dvb_frontend(struct i2c_client *client)
+{
+	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "\n");
+
+	return &priv->fe;
+}
+
+static int cxd2820r_probe(struct i2c_client *client)
+{
+	struct cxd2820r_platform_data *pdata = client->dev.platform_data;
+	struct cxd2820r_priv *priv;
+	int ret, *gpio_chip_base;
+	unsigned int utmp;
+	static const struct regmap_range_cfg regmap_range_cfg0[] = {
+		{
+			.range_min        = 0x0000,
+			.range_max        = 0x3fff,
+			.selector_reg     = 0x00,
+			.selector_mask    = 0xff,
+			.selector_shift   = 0,
+			.window_start     = 0x00,
+			.window_len       = 0x100,
+		},
+	};
+	static const struct regmap_range_cfg regmap_range_cfg1[] = {
+		{
+			.range_min        = 0x0000,
+			.range_max        = 0x01ff,
+			.selector_reg     = 0x00,
+			.selector_mask    = 0xff,
+			.selector_shift   = 0,
+			.window_start     = 0x00,
+			.window_len       = 0x100,
+		},
+	};
+	static const struct regmap_config regmap_config0 = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = 0x3fff,
+		.ranges = regmap_range_cfg0,
+		.num_ranges = ARRAY_SIZE(regmap_range_cfg0),
+		.cache_type = REGCACHE_NONE,
+	};
+	static const struct regmap_config regmap_config1 = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = 0x01ff,
+		.ranges = regmap_range_cfg1,
+		.num_ranges = ARRAY_SIZE(regmap_range_cfg1),
+		.cache_type = REGCACHE_NONE,
+	};
+
+	dev_dbg(&client->dev, "\n");
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	priv->client[0] = client;
+	priv->fe.demodulator_priv = priv;
+	priv->i2c = client->adapter;
+	priv->ts_mode = pdata->ts_mode;
+	priv->ts_clk_inv = pdata->ts_clk_inv;
+	priv->if_agc_polarity = pdata->if_agc_polarity;
+	priv->spec_inv = pdata->spec_inv;
+	gpio_chip_base = *pdata->gpio_chip_base;
+	priv->regmap[0] = regmap_init_i2c(priv->client[0], &regmap_config0);
+	if (IS_ERR(priv->regmap[0])) {
+		ret = PTR_ERR(priv->regmap[0]);
+		goto err_kfree;
+	}
+
+	/* Check demod answers with correct chip id */
+	ret = regmap_read(priv->regmap[0], 0x00fd, &utmp);
+	if (ret)
+		goto err_regmap_0_regmap_exit;
+
+	dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
+
+	if (utmp != 0xe1) {
+		ret = -ENODEV;
+		goto err_regmap_0_regmap_exit;
+	}
+
+	/*
+	 * Chip has two I2C addresses for different register banks. We register
+	 * one dummy I2C client in order to get own I2C client for each
+	 * register bank.
+	 */
+	priv->client[1] = i2c_new_dummy_device(client->adapter, client->addr | (1 << 1));
+	if (IS_ERR(priv->client[1])) {
+		ret = PTR_ERR(priv->client[1]);
+		dev_err(&client->dev, "I2C registration failed\n");
+		goto err_regmap_0_regmap_exit;
+	}
+
+	priv->regmap[1] = regmap_init_i2c(priv->client[1], &regmap_config1);
+	if (IS_ERR(priv->regmap[1])) {
+		ret = PTR_ERR(priv->regmap[1]);
+		goto err_client_1_i2c_unregister_device;
+	}
+
+	if (gpio_chip_base) {
+#ifdef CONFIG_GPIOLIB
+		/* Add GPIOs */
+		priv->gpio_chip.label = KBUILD_MODNAME;
+		priv->gpio_chip.parent = &client->dev;
+		priv->gpio_chip.owner = THIS_MODULE;
+		priv->gpio_chip.direction_output = cxd2820r_gpio_direction_output;
+		priv->gpio_chip.set = cxd2820r_gpio_set;
+		priv->gpio_chip.get = cxd2820r_gpio_get;
+		priv->gpio_chip.base = -1; /* Dynamic allocation */
+		priv->gpio_chip.ngpio = GPIO_COUNT;
+		priv->gpio_chip.can_sleep = 1;
+		ret = gpiochip_add_data(&priv->gpio_chip, priv);
+		if (ret)
+			goto err_regmap_1_regmap_exit;
+
+		dev_dbg(&client->dev, "gpio_chip.base=%d\n",
+			priv->gpio_chip.base);
+
+		*gpio_chip_base = priv->gpio_chip.base;
+#else
+		/*
+		 * Use static GPIO configuration if GPIOLIB is undefined.
+		 * This is fallback condition.
+		 */
+		u8 gpio[GPIO_COUNT];
+		gpio[0] = (*gpio_chip_base >> 0) & 0x07;
+		gpio[1] = (*gpio_chip_base >> 3) & 0x07;
+		gpio[2] = 0;
+		ret = cxd2820r_gpio(&priv->fe, gpio);
+		if (ret)
+			goto err_regmap_1_regmap_exit;
+#endif
+	}
+
+	/* Create dvb frontend */
+	memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
+	if (!pdata->attach_in_use)
+		priv->fe.ops.release = NULL;
+	i2c_set_clientdata(client, priv);
+
+	/* Setup callbacks */
+	pdata->get_dvb_frontend = cxd2820r_get_dvb_frontend;
+
+	dev_info(&client->dev, "Sony CXD2820R successfully identified\n");
+
+	return 0;
+err_regmap_1_regmap_exit:
+	regmap_exit(priv->regmap[1]);
+err_client_1_i2c_unregister_device:
+	i2c_unregister_device(priv->client[1]);
+err_regmap_0_regmap_exit:
+	regmap_exit(priv->regmap[0]);
+err_kfree:
+	kfree(priv);
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static void cxd2820r_remove(struct i2c_client *client)
+{
+	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "\n");
+
+#ifdef CONFIG_GPIOLIB
+	if (priv->gpio_chip.label)
+		gpiochip_remove(&priv->gpio_chip);
+#endif
+	regmap_exit(priv->regmap[1]);
+	i2c_unregister_device(priv->client[1]);
+
+	regmap_exit(priv->regmap[0]);
+
+	kfree(priv);
+}
+
+static const struct i2c_device_id cxd2820r_id_table[] = {
+	{"cxd2820r", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cxd2820r_id_table);
+
+static struct i2c_driver cxd2820r_driver = {
+	.driver = {
+		.name                = "cxd2820r",
+		.suppress_bind_attrs = true,
+	},
+	.probe_new = cxd2820r_probe,
+	.remove   = cxd2820r_remove,
+	.id_table = cxd2820r_id_table,
+};
+
+module_i2c_driver(cxd2820r_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
+MODULE_LICENSE("GPL");