ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 543 insertions, 0 deletions

diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c
new file mode 100644
index 000000000..d5b0e516b
--- /dev/null
+++ b/drivers/phy/cadence/cdns-dphy.c
@@ -0,0 +1,543 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright: 2017-2018 Cadence Design Systems, Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+
+#define REG_WAKEUP_TIME_NS		800
+#define DPHY_PLL_RATE_HZ		108000000
+#define POLL_TIMEOUT_US			1000
+
+/* DPHY registers */
+#define DPHY_PMA_CMN(reg)		(reg)
+#define DPHY_PMA_LCLK(reg)		(0x100 + (reg))
+#define DPHY_PMA_LDATA(lane, reg)	(0x200 + ((lane) * 0x100) + (reg))
+#define DPHY_PMA_RCLK(reg)		(0x600 + (reg))
+#define DPHY_PMA_RDATA(lane, reg)	(0x700 + ((lane) * 0x100) + (reg))
+#define DPHY_PCS(reg)			(0xb00 + (reg))
+
+#define DPHY_CMN_SSM			DPHY_PMA_CMN(0x20)
+#define DPHY_CMN_SSM_EN			BIT(0)
+#define DPHY_CMN_SSM_CAL_WAIT_TIME	GENMASK(8, 1)
+#define DPHY_CMN_TX_MODE_EN		BIT(9)
+
+#define DPHY_CMN_PWM			DPHY_PMA_CMN(0x40)
+#define DPHY_CMN_PWM_DIV(x)		((x) << 20)
+#define DPHY_CMN_PWM_LOW(x)		((x) << 10)
+#define DPHY_CMN_PWM_HIGH(x)		(x)
+
+#define DPHY_CMN_FBDIV			DPHY_PMA_CMN(0x4c)
+#define DPHY_CMN_FBDIV_VAL(low, high)	(((high) << 11) | ((low) << 22))
+#define DPHY_CMN_FBDIV_FROM_REG		(BIT(10) | BIT(21))
+
+#define DPHY_CMN_OPIPDIV		DPHY_PMA_CMN(0x50)
+#define DPHY_CMN_IPDIV_FROM_REG		BIT(0)
+#define DPHY_CMN_IPDIV(x)		((x) << 1)
+#define DPHY_CMN_OPDIV_FROM_REG		BIT(6)
+#define DPHY_CMN_OPDIV(x)		((x) << 7)
+
+#define DPHY_BAND_CFG			DPHY_PCS(0x0)
+#define DPHY_BAND_CFG_LEFT_BAND		GENMASK(4, 0)
+#define DPHY_BAND_CFG_RIGHT_BAND	GENMASK(9, 5)
+
+#define DPHY_PSM_CFG			DPHY_PCS(0x4)
+#define DPHY_PSM_CFG_FROM_REG		BIT(0)
+#define DPHY_PSM_CLK_DIV(x)		((x) << 1)
+
+#define DPHY_TX_J721E_WIZ_PLL_CTRL	0xF04
+#define DPHY_TX_J721E_WIZ_STATUS	0xF08
+#define DPHY_TX_J721E_WIZ_RST_CTRL	0xF0C
+#define DPHY_TX_J721E_WIZ_PSM_FREQ	0xF10
+
+#define DPHY_TX_J721E_WIZ_IPDIV		GENMASK(4, 0)
+#define DPHY_TX_J721E_WIZ_OPDIV		GENMASK(13, 8)
+#define DPHY_TX_J721E_WIZ_FBDIV		GENMASK(25, 16)
+#define DPHY_TX_J721E_WIZ_LANE_RSTB	BIT(31)
+#define DPHY_TX_WIZ_PLL_LOCK		BIT(31)
+#define DPHY_TX_WIZ_O_CMN_READY		BIT(31)
+
+struct cdns_dphy_cfg {
+	u8 pll_ipdiv;
+	u8 pll_opdiv;
+	u16 pll_fbdiv;
+	u32 hs_clk_rate;
+	unsigned int nlanes;
+};
+
+enum cdns_dphy_clk_lane_cfg {
+	DPHY_CLK_CFG_LEFT_DRIVES_ALL = 0,
+	DPHY_CLK_CFG_LEFT_DRIVES_RIGHT = 1,
+	DPHY_CLK_CFG_LEFT_DRIVES_LEFT = 2,
+	DPHY_CLK_CFG_RIGHT_DRIVES_ALL = 3,
+};
+
+struct cdns_dphy;
+struct cdns_dphy_ops {
+	int (*probe)(struct cdns_dphy *dphy);
+	void (*remove)(struct cdns_dphy *dphy);
+	void (*set_psm_div)(struct cdns_dphy *dphy, u8 div);
+	void (*set_clk_lane_cfg)(struct cdns_dphy *dphy,
+				 enum cdns_dphy_clk_lane_cfg cfg);
+	void (*set_pll_cfg)(struct cdns_dphy *dphy,
+			    const struct cdns_dphy_cfg *cfg);
+	unsigned long (*get_wakeup_time_ns)(struct cdns_dphy *dphy);
+	int (*wait_for_pll_lock)(struct cdns_dphy *dphy);
+	int (*wait_for_cmn_ready)(struct cdns_dphy *dphy);
+};
+
+struct cdns_dphy {
+	struct cdns_dphy_cfg cfg;
+	void __iomem *regs;
+	struct clk *psm_clk;
+	struct clk *pll_ref_clk;
+	const struct cdns_dphy_ops *ops;
+	struct phy *phy;
+	bool is_configured;
+	bool is_powered;
+};
+
+/* Order of bands is important since the index is the band number. */
+static const unsigned int tx_bands[] = {
+	80, 100, 120, 160, 200, 240, 320, 390, 450, 510, 560, 640, 690, 770,
+	870, 950, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2500
+};
+
+static int cdns_dphy_get_pll_cfg(struct cdns_dphy *dphy,
+				 struct cdns_dphy_cfg *cfg,
+				 struct phy_configure_opts_mipi_dphy *opts)
+{
+	unsigned long pll_ref_hz = clk_get_rate(dphy->pll_ref_clk);
+	u64 dlane_bps;
+
+	memset(cfg, 0, sizeof(*cfg));
+
+	if (pll_ref_hz < 9600000 || pll_ref_hz >= 150000000)
+		return -EINVAL;
+	else if (pll_ref_hz < 19200000)
+		cfg->pll_ipdiv = 1;
+	else if (pll_ref_hz < 38400000)
+		cfg->pll_ipdiv = 2;
+	else if (pll_ref_hz < 76800000)
+		cfg->pll_ipdiv = 4;
+	else
+		cfg->pll_ipdiv = 8;
+
+	dlane_bps = opts->hs_clk_rate;
+
+	if (dlane_bps > 2500000000UL || dlane_bps < 80000000UL)
+		return -EINVAL;
+	else if (dlane_bps >= 1250000000)
+		cfg->pll_opdiv = 1;
+	else if (dlane_bps >= 630000000)
+		cfg->pll_opdiv = 2;
+	else if (dlane_bps >= 320000000)
+		cfg->pll_opdiv = 4;
+	else if (dlane_bps >= 160000000)
+		cfg->pll_opdiv = 8;
+	else if (dlane_bps >= 80000000)
+		cfg->pll_opdiv = 16;
+
+	cfg->pll_fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv *
+					  cfg->pll_ipdiv,
+					  pll_ref_hz);
+
+	cfg->hs_clk_rate = div_u64((u64)pll_ref_hz * cfg->pll_fbdiv,
+				   2 * cfg->pll_opdiv * cfg->pll_ipdiv);
+
+	return 0;
+}
+
+static int cdns_dphy_setup_psm(struct cdns_dphy *dphy)
+{
+	unsigned long psm_clk_hz = clk_get_rate(dphy->psm_clk);
+	unsigned long psm_div;
+
+	if (!psm_clk_hz || psm_clk_hz > 100000000)
+		return -EINVAL;
+
+	psm_div = DIV_ROUND_CLOSEST(psm_clk_hz, 1000000);
+	if (dphy->ops->set_psm_div)
+		dphy->ops->set_psm_div(dphy, psm_div);
+
+	return 0;
+}
+
+static void cdns_dphy_set_clk_lane_cfg(struct cdns_dphy *dphy,
+				       enum cdns_dphy_clk_lane_cfg cfg)
+{
+	if (dphy->ops->set_clk_lane_cfg)
+		dphy->ops->set_clk_lane_cfg(dphy, cfg);
+}
+
+static void cdns_dphy_set_pll_cfg(struct cdns_dphy *dphy,
+				  const struct cdns_dphy_cfg *cfg)
+{
+	if (dphy->ops->set_pll_cfg)
+		dphy->ops->set_pll_cfg(dphy, cfg);
+}
+
+static unsigned long cdns_dphy_get_wakeup_time_ns(struct cdns_dphy *dphy)
+{
+	return dphy->ops->get_wakeup_time_ns(dphy);
+}
+
+static int cdns_dphy_wait_for_pll_lock(struct cdns_dphy *dphy)
+{
+	return dphy->ops->wait_for_pll_lock ? dphy->ops->wait_for_pll_lock(dphy) : 0;
+}
+
+static int cdns_dphy_wait_for_cmn_ready(struct cdns_dphy *dphy)
+{
+	return  dphy->ops->wait_for_cmn_ready ? dphy->ops->wait_for_cmn_ready(dphy) : 0;
+}
+
+static unsigned long cdns_dphy_ref_get_wakeup_time_ns(struct cdns_dphy *dphy)
+{
+	/* Default wakeup time is 800 ns (in a simulated environment). */
+	return 800;
+}
+
+static void cdns_dphy_ref_set_pll_cfg(struct cdns_dphy *dphy,
+				      const struct cdns_dphy_cfg *cfg)
+{
+	u32 fbdiv_low, fbdiv_high;
+
+	fbdiv_low = (cfg->pll_fbdiv / 4) - 2;
+	fbdiv_high = cfg->pll_fbdiv - fbdiv_low - 2;
+
+	writel(DPHY_CMN_IPDIV_FROM_REG | DPHY_CMN_OPDIV_FROM_REG |
+	       DPHY_CMN_IPDIV(cfg->pll_ipdiv) |
+	       DPHY_CMN_OPDIV(cfg->pll_opdiv),
+	       dphy->regs + DPHY_CMN_OPIPDIV);
+	writel(DPHY_CMN_FBDIV_FROM_REG |
+	       DPHY_CMN_FBDIV_VAL(fbdiv_low, fbdiv_high),
+	       dphy->regs + DPHY_CMN_FBDIV);
+	writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) |
+	       DPHY_CMN_PWM_DIV(0x8),
+	       dphy->regs + DPHY_CMN_PWM);
+}
+
+static void cdns_dphy_ref_set_psm_div(struct cdns_dphy *dphy, u8 div)
+{
+	writel(DPHY_PSM_CFG_FROM_REG | DPHY_PSM_CLK_DIV(div),
+	       dphy->regs + DPHY_PSM_CFG);
+}
+
+static unsigned long cdns_dphy_j721e_get_wakeup_time_ns(struct cdns_dphy *dphy)
+{
+	/* Minimum wakeup time as per MIPI D-PHY spec v1.2 */
+	return 1000000;
+}
+
+static void cdns_dphy_j721e_set_pll_cfg(struct cdns_dphy *dphy,
+					const struct cdns_dphy_cfg *cfg)
+{
+
+	/*
+	 * set the PWM and PLL Byteclk divider settings to recommended values
+	 * which is same as that of in ref ops
+	 */
+	writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) |
+	       DPHY_CMN_PWM_DIV(0x8),
+	       dphy->regs + DPHY_CMN_PWM);
+
+	writel((FIELD_PREP(DPHY_TX_J721E_WIZ_IPDIV, cfg->pll_ipdiv) |
+		FIELD_PREP(DPHY_TX_J721E_WIZ_OPDIV, cfg->pll_opdiv) |
+		FIELD_PREP(DPHY_TX_J721E_WIZ_FBDIV, cfg->pll_fbdiv)),
+		dphy->regs + DPHY_TX_J721E_WIZ_PLL_CTRL);
+
+	writel(DPHY_TX_J721E_WIZ_LANE_RSTB,
+	       dphy->regs + DPHY_TX_J721E_WIZ_RST_CTRL);
+}
+
+static void cdns_dphy_j721e_set_psm_div(struct cdns_dphy *dphy, u8 div)
+{
+	writel(div, dphy->regs + DPHY_TX_J721E_WIZ_PSM_FREQ);
+}
+
+static int cdns_dphy_j721e_wait_for_pll_lock(struct cdns_dphy *dphy)
+{
+	u32 status;
+
+	return readl_poll_timeout(dphy->regs + DPHY_TX_J721E_WIZ_PLL_CTRL, status,
+			       status & DPHY_TX_WIZ_PLL_LOCK, 0, POLL_TIMEOUT_US);
+}
+
+static int cdns_dphy_j721e_wait_for_cmn_ready(struct cdns_dphy *dphy)
+{
+	u32 status;
+
+	return readl_poll_timeout(dphy->regs + DPHY_TX_J721E_WIZ_STATUS, status,
+			       status & DPHY_TX_WIZ_O_CMN_READY, 0,
+			       POLL_TIMEOUT_US);
+}
+
+/*
+ * This is the reference implementation of DPHY hooks. Specific integration of
+ * this IP may have to re-implement some of them depending on how they decided
+ * to wire things in the SoC.
+ */
+static const struct cdns_dphy_ops ref_dphy_ops = {
+	.get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns,
+	.set_pll_cfg = cdns_dphy_ref_set_pll_cfg,
+	.set_psm_div = cdns_dphy_ref_set_psm_div,
+};
+
+static const struct cdns_dphy_ops j721e_dphy_ops = {
+	.get_wakeup_time_ns = cdns_dphy_j721e_get_wakeup_time_ns,
+	.set_pll_cfg = cdns_dphy_j721e_set_pll_cfg,
+	.set_psm_div = cdns_dphy_j721e_set_psm_div,
+	.wait_for_pll_lock = cdns_dphy_j721e_wait_for_pll_lock,
+	.wait_for_cmn_ready = cdns_dphy_j721e_wait_for_cmn_ready,
+};
+
+static int cdns_dphy_config_from_opts(struct phy *phy,
+				      struct phy_configure_opts_mipi_dphy *opts,
+				      struct cdns_dphy_cfg *cfg)
+{
+	struct cdns_dphy *dphy = phy_get_drvdata(phy);
+	int ret;
+
+	ret = phy_mipi_dphy_config_validate(opts);
+	if (ret)
+		return ret;
+
+	ret = cdns_dphy_get_pll_cfg(dphy, cfg, opts);
+	if (ret)
+		return ret;
+
+	opts->hs_clk_rate = cfg->hs_clk_rate;
+	opts->wakeup = cdns_dphy_get_wakeup_time_ns(dphy) / 1000;
+
+	return 0;
+}
+
+static int cdns_dphy_tx_get_band_ctrl(unsigned long hs_clk_rate)
+{
+	unsigned int rate;
+	int i;
+
+	rate = hs_clk_rate / 1000000UL;
+
+	if (rate < tx_bands[0])
+		return -EOPNOTSUPP;
+
+	for (i = 0; i < ARRAY_SIZE(tx_bands) - 1; i++) {
+		if (rate >= tx_bands[i] && rate < tx_bands[i + 1])
+			return i;
+	}
+
+	return -EOPNOTSUPP;
+}
+
+static int cdns_dphy_validate(struct phy *phy, enum phy_mode mode, int submode,
+			      union phy_configure_opts *opts)
+{
+	struct cdns_dphy_cfg cfg = { 0 };
+
+	if (mode != PHY_MODE_MIPI_DPHY)
+		return -EINVAL;
+
+	return cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &cfg);
+}
+
+static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
+{
+	struct cdns_dphy *dphy = phy_get_drvdata(phy);
+	int ret;
+
+	ret = cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &dphy->cfg);
+	if (!ret)
+		dphy->is_configured = true;
+
+	return ret;
+}
+
+static int cdns_dphy_power_on(struct phy *phy)
+{
+	struct cdns_dphy *dphy = phy_get_drvdata(phy);
+	int ret;
+	u32 reg;
+
+	if (!dphy->is_configured || dphy->is_powered)
+		return -EINVAL;
+
+	clk_prepare_enable(dphy->psm_clk);
+	clk_prepare_enable(dphy->pll_ref_clk);
+
+	/*
+	 * Configure the internal PSM clk divider so that the DPHY has a
+	 * 1MHz clk (or something close).
+	 */
+	ret = cdns_dphy_setup_psm(dphy);
+	if (ret) {
+		dev_err(&dphy->phy->dev, "Failed to setup PSM with error %d\n", ret);
+		goto err_power_on;
+	}
+
+	/*
+	 * Configure attach clk lanes to data lanes: the DPHY has 2 clk lanes
+	 * and 8 data lanes, each clk lane can be attache different set of
+	 * data lanes. The 2 groups are named 'left' and 'right', so here we
+	 * just say that we want the 'left' clk lane to drive the 'left' data
+	 * lanes.
+	 */
+	cdns_dphy_set_clk_lane_cfg(dphy, DPHY_CLK_CFG_LEFT_DRIVES_LEFT);
+
+	/*
+	 * Configure the DPHY PLL that will be used to generate the TX byte
+	 * clk.
+	 */
+	cdns_dphy_set_pll_cfg(dphy, &dphy->cfg);
+
+	ret = cdns_dphy_tx_get_band_ctrl(dphy->cfg.hs_clk_rate);
+	if (ret < 0) {
+		dev_err(&dphy->phy->dev, "Failed to get band control value with error %d\n", ret);
+		goto err_power_on;
+	}
+
+	reg = FIELD_PREP(DPHY_BAND_CFG_LEFT_BAND, ret) |
+	      FIELD_PREP(DPHY_BAND_CFG_RIGHT_BAND, ret);
+	writel(reg, dphy->regs + DPHY_BAND_CFG);
+
+	/* Start TX state machine. */
+	reg = readl(dphy->regs + DPHY_CMN_SSM);
+	writel((reg & DPHY_CMN_SSM_CAL_WAIT_TIME) | DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN,
+	       dphy->regs + DPHY_CMN_SSM);
+
+	ret = cdns_dphy_wait_for_pll_lock(dphy);
+	if (ret) {
+		dev_err(&dphy->phy->dev, "Failed to lock PLL with error %d\n", ret);
+		goto err_power_on;
+	}
+
+	ret = cdns_dphy_wait_for_cmn_ready(dphy);
+	if (ret) {
+		dev_err(&dphy->phy->dev, "O_CMN_READY signal failed to assert with error %d\n",
+			ret);
+		goto err_power_on;
+	}
+
+	dphy->is_powered = true;
+
+	return 0;
+
+err_power_on:
+	clk_disable_unprepare(dphy->pll_ref_clk);
+	clk_disable_unprepare(dphy->psm_clk);
+
+	return ret;
+}
+
+static int cdns_dphy_power_off(struct phy *phy)
+{
+	struct cdns_dphy *dphy = phy_get_drvdata(phy);
+	u32 reg;
+
+	clk_disable_unprepare(dphy->pll_ref_clk);
+	clk_disable_unprepare(dphy->psm_clk);
+
+	/* Stop TX state machine. */
+	reg = readl(dphy->regs + DPHY_CMN_SSM);
+	writel(reg & ~DPHY_CMN_SSM_EN, dphy->regs + DPHY_CMN_SSM);
+
+	dphy->is_powered = false;
+
+	return 0;
+}
+
+static const struct phy_ops cdns_dphy_ops = {
+	.configure	= cdns_dphy_configure,
+	.validate	= cdns_dphy_validate,
+	.power_on	= cdns_dphy_power_on,
+	.power_off	= cdns_dphy_power_off,
+};
+
+static int cdns_dphy_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy_provider;
+	struct cdns_dphy *dphy;
+	int ret;
+
+	dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+	if (!dphy)
+		return -ENOMEM;
+	dev_set_drvdata(&pdev->dev, dphy);
+
+	dphy->ops = of_device_get_match_data(&pdev->dev);
+	if (!dphy->ops)
+		return -EINVAL;
+
+	dphy->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dphy->regs))
+		return PTR_ERR(dphy->regs);
+
+	dphy->psm_clk = devm_clk_get(&pdev->dev, "psm");
+	if (IS_ERR(dphy->psm_clk))
+		return PTR_ERR(dphy->psm_clk);
+
+	dphy->pll_ref_clk = devm_clk_get(&pdev->dev, "pll_ref");
+	if (IS_ERR(dphy->pll_ref_clk))
+		return PTR_ERR(dphy->pll_ref_clk);
+
+	if (dphy->ops->probe) {
+		ret = dphy->ops->probe(dphy);
+		if (ret)
+			return ret;
+	}
+
+	dphy->phy = devm_phy_create(&pdev->dev, NULL, &cdns_dphy_ops);
+	if (IS_ERR(dphy->phy)) {
+		dev_err(&pdev->dev, "failed to create PHY\n");
+		if (dphy->ops->remove)
+			dphy->ops->remove(dphy);
+		return PTR_ERR(dphy->phy);
+	}
+
+	phy_set_drvdata(dphy->phy, dphy);
+	phy_provider = devm_of_phy_provider_register(&pdev->dev,
+						     of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static void cdns_dphy_remove(struct platform_device *pdev)
+{
+	struct cdns_dphy *dphy = dev_get_drvdata(&pdev->dev);
+
+	if (dphy->ops->remove)
+		dphy->ops->remove(dphy);
+}
+
+static const struct of_device_id cdns_dphy_of_match[] = {
+	{ .compatible = "cdns,dphy", .data = &ref_dphy_ops },
+	{ .compatible = "ti,j721e-dphy", .data = &j721e_dphy_ops },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, cdns_dphy_of_match);
+
+static struct platform_driver cdns_dphy_platform_driver = {
+	.probe		= cdns_dphy_probe,
+	.remove		= cdns_dphy_remove,
+	.driver		= {
+		.name		= "cdns-mipi-dphy",
+		.of_match_table	= cdns_dphy_of_match,
+	},
+};
+module_platform_driver(cdns_dphy_platform_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@bootlin.com>");
+MODULE_DESCRIPTION("Cadence MIPI D-PHY Driver");
+MODULE_LICENSE("GPL");