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, 618 insertions, 0 deletions

diff --git a/sound/soc/img/img-i2s-out.c b/sound/soc/img/img-i2s-out.c
new file mode 100644
index 000000000..abeff7829
--- /dev/null
+++ b/sound/soc/img/img-i2s-out.c
@@ -0,0 +1,618 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IMG I2S output controller driver
+ *
+ * Copyright (C) 2015 Imagination Technologies Ltd.
+ *
+ * Author: Damien Horsley <Damien.Horsley@imgtec.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define IMG_I2S_OUT_TX_FIFO			0x0
+
+#define IMG_I2S_OUT_CTL				0x4
+#define IMG_I2S_OUT_CTL_DATA_EN_MASK		BIT(24)
+#define IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK	0xffe000
+#define IMG_I2S_OUT_CTL_ACTIVE_CHAN_SHIFT	13
+#define IMG_I2S_OUT_CTL_FRM_SIZE_MASK		BIT(8)
+#define IMG_I2S_OUT_CTL_MASTER_MASK		BIT(6)
+#define IMG_I2S_OUT_CTL_CLK_MASK		BIT(5)
+#define IMG_I2S_OUT_CTL_CLK_EN_MASK		BIT(4)
+#define IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK	BIT(3)
+#define IMG_I2S_OUT_CTL_BCLK_POL_MASK		BIT(2)
+#define IMG_I2S_OUT_CTL_ME_MASK			BIT(0)
+
+#define IMG_I2S_OUT_CH_CTL			0x4
+#define IMG_I2S_OUT_CHAN_CTL_CH_MASK		BIT(11)
+#define IMG_I2S_OUT_CHAN_CTL_LT_MASK		BIT(10)
+#define IMG_I2S_OUT_CHAN_CTL_FMT_MASK		0xf0
+#define IMG_I2S_OUT_CHAN_CTL_FMT_SHIFT		4
+#define IMG_I2S_OUT_CHAN_CTL_JUST_MASK		BIT(3)
+#define IMG_I2S_OUT_CHAN_CTL_CLKT_MASK		BIT(1)
+#define IMG_I2S_OUT_CHAN_CTL_ME_MASK		BIT(0)
+
+#define IMG_I2S_OUT_CH_STRIDE			0x20
+
+struct img_i2s_out {
+	void __iomem *base;
+	struct clk *clk_sys;
+	struct clk *clk_ref;
+	struct snd_dmaengine_dai_dma_data dma_data;
+	struct device *dev;
+	unsigned int max_i2s_chan;
+	void __iomem *channel_base;
+	bool force_clk_active;
+	unsigned int active_channels;
+	struct reset_control *rst;
+	struct snd_soc_dai_driver dai_driver;
+	u32 suspend_ctl;
+	u32 *suspend_ch_ctl;
+};
+
+static int img_i2s_out_runtime_suspend(struct device *dev)
+{
+	struct img_i2s_out *i2s = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(i2s->clk_ref);
+	clk_disable_unprepare(i2s->clk_sys);
+
+	return 0;
+}
+
+static int img_i2s_out_runtime_resume(struct device *dev)
+{
+	struct img_i2s_out *i2s = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(i2s->clk_sys);
+	if (ret) {
+		dev_err(dev, "clk_enable failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(i2s->clk_ref);
+	if (ret) {
+		dev_err(dev, "clk_enable failed: %d\n", ret);
+		clk_disable_unprepare(i2s->clk_sys);
+		return ret;
+	}
+
+	return 0;
+}
+
+static inline void img_i2s_out_writel(struct img_i2s_out *i2s, u32 val,
+					u32 reg)
+{
+	writel(val, i2s->base + reg);
+}
+
+static inline u32 img_i2s_out_readl(struct img_i2s_out *i2s, u32 reg)
+{
+	return readl(i2s->base + reg);
+}
+
+static inline void img_i2s_out_ch_writel(struct img_i2s_out *i2s,
+					u32 chan, u32 val, u32 reg)
+{
+	writel(val, i2s->channel_base + (chan * IMG_I2S_OUT_CH_STRIDE) + reg);
+}
+
+static inline u32 img_i2s_out_ch_readl(struct img_i2s_out *i2s, u32 chan,
+					u32 reg)
+{
+	return readl(i2s->channel_base + (chan * IMG_I2S_OUT_CH_STRIDE) + reg);
+}
+
+static inline void img_i2s_out_ch_disable(struct img_i2s_out *i2s, u32 chan)
+{
+	u32 reg;
+
+	reg = img_i2s_out_ch_readl(i2s, chan, IMG_I2S_OUT_CH_CTL);
+	reg &= ~IMG_I2S_OUT_CHAN_CTL_ME_MASK;
+	img_i2s_out_ch_writel(i2s, chan, reg, IMG_I2S_OUT_CH_CTL);
+}
+
+static inline void img_i2s_out_ch_enable(struct img_i2s_out *i2s, u32 chan)
+{
+	u32 reg;
+
+	reg = img_i2s_out_ch_readl(i2s, chan, IMG_I2S_OUT_CH_CTL);
+	reg |= IMG_I2S_OUT_CHAN_CTL_ME_MASK;
+	img_i2s_out_ch_writel(i2s, chan, reg, IMG_I2S_OUT_CH_CTL);
+}
+
+static inline void img_i2s_out_disable(struct img_i2s_out *i2s)
+{
+	u32 reg;
+
+	reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+	reg &= ~IMG_I2S_OUT_CTL_ME_MASK;
+	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+}
+
+static inline void img_i2s_out_enable(struct img_i2s_out *i2s)
+{
+	u32 reg;
+
+	reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+	reg |= IMG_I2S_OUT_CTL_ME_MASK;
+	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+}
+
+static void img_i2s_out_reset(struct img_i2s_out *i2s)
+{
+	int i;
+	u32 core_ctl, chan_ctl;
+
+	core_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL) &
+			~IMG_I2S_OUT_CTL_ME_MASK &
+			~IMG_I2S_OUT_CTL_DATA_EN_MASK;
+
+	if (!i2s->force_clk_active)
+		core_ctl &= ~IMG_I2S_OUT_CTL_CLK_EN_MASK;
+
+	chan_ctl = img_i2s_out_ch_readl(i2s, 0, IMG_I2S_OUT_CH_CTL) &
+			~IMG_I2S_OUT_CHAN_CTL_ME_MASK;
+
+	reset_control_assert(i2s->rst);
+	reset_control_deassert(i2s->rst);
+
+	for (i = 0; i < i2s->max_i2s_chan; i++)
+		img_i2s_out_ch_writel(i2s, i, chan_ctl, IMG_I2S_OUT_CH_CTL);
+
+	for (i = 0; i < i2s->active_channels; i++)
+		img_i2s_out_ch_enable(i2s, i);
+
+	img_i2s_out_writel(i2s, core_ctl, IMG_I2S_OUT_CTL);
+	img_i2s_out_enable(i2s);
+}
+
+static int img_i2s_out_trigger(struct snd_pcm_substream *substream, int cmd,
+	struct snd_soc_dai *dai)
+{
+	struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
+	u32 reg;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+		if (!i2s->force_clk_active)
+			reg |= IMG_I2S_OUT_CTL_CLK_EN_MASK;
+		reg |= IMG_I2S_OUT_CTL_DATA_EN_MASK;
+		img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		img_i2s_out_reset(i2s);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int img_i2s_out_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
+	unsigned int channels, i2s_channels;
+	long pre_div_a, pre_div_b, diff_a, diff_b, rate, clk_rate;
+	int i;
+	u32 reg, control_mask, control_set = 0;
+	snd_pcm_format_t format;
+
+	rate = params_rate(params);
+	format = params_format(params);
+	channels = params_channels(params);
+	i2s_channels = channels / 2;
+
+	if (format != SNDRV_PCM_FORMAT_S32_LE)
+		return -EINVAL;
+
+	if ((channels < 2) ||
+	    (channels > (i2s->max_i2s_chan * 2)) ||
+	    (channels % 2))
+		return -EINVAL;
+
+	pre_div_a = clk_round_rate(i2s->clk_ref, rate * 256);
+	if (pre_div_a < 0)
+		return pre_div_a;
+	pre_div_b = clk_round_rate(i2s->clk_ref, rate * 384);
+	if (pre_div_b < 0)
+		return pre_div_b;
+
+	diff_a = abs((pre_div_a / 256) - rate);
+	diff_b = abs((pre_div_b / 384) - rate);
+
+	/* If diffs are equal, use lower clock rate */
+	if (diff_a > diff_b)
+		clk_set_rate(i2s->clk_ref, pre_div_b);
+	else
+		clk_set_rate(i2s->clk_ref, pre_div_a);
+
+	/*
+	 * Another driver (eg alsa machine driver) may have rejected the above
+	 * change. Get the current rate and set the register bit according to
+	 * the new minimum diff
+	 */
+	clk_rate = clk_get_rate(i2s->clk_ref);
+
+	diff_a = abs((clk_rate / 256) - rate);
+	diff_b = abs((clk_rate / 384) - rate);
+
+	if (diff_a > diff_b)
+		control_set |= IMG_I2S_OUT_CTL_CLK_MASK;
+
+	control_set |= ((i2s_channels - 1) <<
+		       IMG_I2S_OUT_CTL_ACTIVE_CHAN_SHIFT) &
+		       IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK;
+
+	control_mask = IMG_I2S_OUT_CTL_CLK_MASK |
+		       IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK;
+
+	img_i2s_out_disable(i2s);
+
+	reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+	reg = (reg & ~control_mask) | control_set;
+	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+
+	for (i = 0; i < i2s_channels; i++)
+		img_i2s_out_ch_enable(i2s, i);
+
+	for (; i < i2s->max_i2s_chan; i++)
+		img_i2s_out_ch_disable(i2s, i);
+
+	img_i2s_out_enable(i2s);
+
+	i2s->active_channels = i2s_channels;
+
+	return 0;
+}
+
+static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
+	int i, ret;
+	bool force_clk_active;
+	u32 chan_control_mask, control_mask, chan_control_set = 0;
+	u32 reg, control_set = 0;
+
+	force_clk_active = ((fmt & SND_SOC_DAIFMT_CLOCK_MASK) ==
+			SND_SOC_DAIFMT_CONT);
+
+	if (force_clk_active)
+		control_set |= IMG_I2S_OUT_CTL_CLK_EN_MASK;
+
+	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_BC_FC:
+		break;
+	case SND_SOC_DAIFMT_BP_FP:
+		control_set |= IMG_I2S_OUT_CTL_MASTER_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		control_set |= IMG_I2S_OUT_CTL_BCLK_POL_MASK;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		control_set |= IMG_I2S_OUT_CTL_BCLK_POL_MASK;
+		control_set |= IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		control_set |= IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		chan_control_set |= IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	control_mask = IMG_I2S_OUT_CTL_CLK_EN_MASK |
+		       IMG_I2S_OUT_CTL_MASTER_MASK |
+		       IMG_I2S_OUT_CTL_BCLK_POL_MASK |
+		       IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
+
+	chan_control_mask = IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
+
+	ret = pm_runtime_resume_and_get(i2s->dev);
+	if (ret < 0)
+		return ret;
+
+	img_i2s_out_disable(i2s);
+
+	reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+	reg = (reg & ~control_mask) | control_set;
+	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+
+	for (i = 0; i < i2s->active_channels; i++)
+		img_i2s_out_ch_disable(i2s, i);
+
+	for (i = 0; i < i2s->max_i2s_chan; i++) {
+		reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL);
+		reg = (reg & ~chan_control_mask) | chan_control_set;
+		img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
+	}
+
+	for (i = 0; i < i2s->active_channels; i++)
+		img_i2s_out_ch_enable(i2s, i);
+
+	img_i2s_out_enable(i2s);
+	pm_runtime_put(i2s->dev);
+
+	i2s->force_clk_active = force_clk_active;
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops img_i2s_out_dai_ops = {
+	.trigger = img_i2s_out_trigger,
+	.hw_params = img_i2s_out_hw_params,
+	.set_fmt = img_i2s_out_set_fmt
+};
+
+static int img_i2s_out_dai_probe(struct snd_soc_dai *dai)
+{
+	struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, &i2s->dma_data, NULL);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver img_i2s_out_component = {
+	.name = "img-i2s-out",
+	.legacy_dai_naming = 1,
+};
+
+static int img_i2s_out_dma_prepare_slave_config(struct snd_pcm_substream *st,
+	struct snd_pcm_hw_params *params, struct dma_slave_config *sc)
+{
+	unsigned int i2s_channels = params_channels(params) / 2;
+	struct snd_soc_pcm_runtime *rtd = st->private_data;
+	struct snd_dmaengine_dai_dma_data *dma_data;
+	int ret;
+
+	dma_data = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), st);
+
+	ret = snd_hwparams_to_dma_slave_config(st, params, sc);
+	if (ret)
+		return ret;
+
+	sc->dst_addr = dma_data->addr;
+	sc->dst_addr_width = dma_data->addr_width;
+	sc->dst_maxburst = 4 * i2s_channels;
+
+	return 0;
+}
+
+static const struct snd_dmaengine_pcm_config img_i2s_out_dma_config = {
+	.prepare_slave_config = img_i2s_out_dma_prepare_slave_config
+};
+
+static int img_i2s_out_probe(struct platform_device *pdev)
+{
+	struct img_i2s_out *i2s;
+	struct resource *res;
+	void __iomem *base;
+	int i, ret;
+	unsigned int max_i2s_chan_pow_2;
+	u32 reg;
+	struct device *dev = &pdev->dev;
+
+	i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
+	if (!i2s)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, i2s);
+
+	i2s->dev = &pdev->dev;
+
+	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	i2s->base = base;
+
+	if (of_property_read_u32(pdev->dev.of_node, "img,i2s-channels",
+			&i2s->max_i2s_chan)) {
+		dev_err(&pdev->dev, "No img,i2s-channels property\n");
+		return -EINVAL;
+	}
+
+	max_i2s_chan_pow_2 = 1 << get_count_order(i2s->max_i2s_chan);
+
+	i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20);
+
+	i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, "rst");
+	if (IS_ERR(i2s->rst))
+		return dev_err_probe(&pdev->dev, PTR_ERR(i2s->rst),
+				     "No top level reset found\n");
+
+	i2s->clk_sys = devm_clk_get(&pdev->dev, "sys");
+	if (IS_ERR(i2s->clk_sys))
+		return dev_err_probe(dev, PTR_ERR(i2s->clk_sys),
+				     "Failed to acquire clock 'sys'\n");
+
+	i2s->clk_ref = devm_clk_get(&pdev->dev, "ref");
+	if (IS_ERR(i2s->clk_ref))
+		return dev_err_probe(dev, PTR_ERR(i2s->clk_ref),
+				     "Failed to acquire clock 'ref'\n");
+
+	i2s->suspend_ch_ctl = devm_kcalloc(dev,
+		i2s->max_i2s_chan, sizeof(*i2s->suspend_ch_ctl), GFP_KERNEL);
+	if (!i2s->suspend_ch_ctl)
+		return -ENOMEM;
+
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		ret = img_i2s_out_runtime_resume(&pdev->dev);
+		if (ret)
+			goto err_pm_disable;
+	}
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret < 0)
+		goto err_suspend;
+
+	reg = IMG_I2S_OUT_CTL_FRM_SIZE_MASK;
+	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
+
+	reg = IMG_I2S_OUT_CHAN_CTL_JUST_MASK |
+		IMG_I2S_OUT_CHAN_CTL_LT_MASK |
+		IMG_I2S_OUT_CHAN_CTL_CH_MASK |
+		(8 << IMG_I2S_OUT_CHAN_CTL_FMT_SHIFT);
+
+	for (i = 0; i < i2s->max_i2s_chan; i++)
+		img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
+
+	img_i2s_out_reset(i2s);
+	pm_runtime_put(&pdev->dev);
+
+	i2s->active_channels = 1;
+	i2s->dma_data.addr = res->start + IMG_I2S_OUT_TX_FIFO;
+	i2s->dma_data.addr_width = 4;
+	i2s->dma_data.maxburst = 4;
+
+	i2s->dai_driver.probe = img_i2s_out_dai_probe;
+	i2s->dai_driver.playback.channels_min = 2;
+	i2s->dai_driver.playback.channels_max = i2s->max_i2s_chan * 2;
+	i2s->dai_driver.playback.rates = SNDRV_PCM_RATE_8000_192000;
+	i2s->dai_driver.playback.formats = SNDRV_PCM_FMTBIT_S32_LE;
+	i2s->dai_driver.ops = &img_i2s_out_dai_ops;
+
+	ret = devm_snd_soc_register_component(&pdev->dev,
+			&img_i2s_out_component, &i2s->dai_driver, 1);
+	if (ret)
+		goto err_suspend;
+
+	ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
+			&img_i2s_out_dma_config, 0);
+	if (ret)
+		goto err_suspend;
+
+	return 0;
+
+err_suspend:
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		img_i2s_out_runtime_suspend(&pdev->dev);
+err_pm_disable:
+	pm_runtime_disable(&pdev->dev);
+
+	return ret;
+}
+
+static int img_i2s_out_dev_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		img_i2s_out_runtime_suspend(&pdev->dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int img_i2s_out_suspend(struct device *dev)
+{
+	struct img_i2s_out *i2s = dev_get_drvdata(dev);
+	int i, ret;
+	u32 reg;
+
+	if (pm_runtime_status_suspended(dev)) {
+		ret = img_i2s_out_runtime_resume(dev);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < i2s->max_i2s_chan; i++) {
+		reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL);
+		i2s->suspend_ch_ctl[i] = reg;
+	}
+
+	i2s->suspend_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+
+	img_i2s_out_runtime_suspend(dev);
+
+	return 0;
+}
+
+static int img_i2s_out_resume(struct device *dev)
+{
+	struct img_i2s_out *i2s = dev_get_drvdata(dev);
+	int i, ret;
+	u32 reg;
+
+	ret = img_i2s_out_runtime_resume(dev);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < i2s->max_i2s_chan; i++) {
+		reg = i2s->suspend_ch_ctl[i];
+		img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
+	}
+
+	img_i2s_out_writel(i2s, i2s->suspend_ctl, IMG_I2S_OUT_CTL);
+
+	if (pm_runtime_status_suspended(dev))
+		img_i2s_out_runtime_suspend(dev);
+
+	return 0;
+}
+#endif
+
+static const struct of_device_id img_i2s_out_of_match[] = {
+	{ .compatible = "img,i2s-out" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, img_i2s_out_of_match);
+
+static const struct dev_pm_ops img_i2s_out_pm_ops = {
+	SET_RUNTIME_PM_OPS(img_i2s_out_runtime_suspend,
+			   img_i2s_out_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(img_i2s_out_suspend, img_i2s_out_resume)
+};
+
+static struct platform_driver img_i2s_out_driver = {
+	.driver = {
+		.name = "img-i2s-out",
+		.of_match_table = img_i2s_out_of_match,
+		.pm = &img_i2s_out_pm_ops
+	},
+	.probe = img_i2s_out_probe,
+	.remove = img_i2s_out_dev_remove
+};
+module_platform_driver(img_i2s_out_driver);
+
+MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
+MODULE_DESCRIPTION("IMG I2S Output Driver");
+MODULE_LICENSE("GPL v2");