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[v6,3/3] phy: mediatek: tphy: add debugfs files

Message ID 20230104132646.7100-3-chunfeng.yun@mediatek.com
State Changes Requested
Headers show
Series [v6,1/3] phy: mediatek: fix build warning caused by clang | expand

Commit Message

Chunfeng Yun Jan. 4, 2023, 1:26 p.m. UTC 
These debugfs files are mainly used to make eye diagram test easier,
especially helpful to do HQA test for a new IC without efuse enabled.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v6: no changes

v5: using common debugfs config CONFIG_DEBUG_FS

v4: fix build warning of sometimes uninitialized variable

v3: fix typo of "debugfs" suggested by AngeloGioacchino

v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
---
 drivers/phy/mediatek/phy-mtk-tphy.c | 405 +++++++++++++++++++++++++++-
 1 file changed, 404 insertions(+), 1 deletion(-)

Comments

Vinod Koul Jan. 13, 2023, 6:15 p.m. UTC | #1 
On 04-01-23, 21:26, Chunfeng Yun wrote:
> These debugfs files are mainly used to make eye diagram test easier,
> especially helpful to do HQA test for a new IC without efuse enabled.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> v6: no changes
> 
> v5: using common debugfs config CONFIG_DEBUG_FS
> 
> v4: fix build warning of sometimes uninitialized variable
> 
> v3: fix typo of "debugfs" suggested by AngeloGioacchino
> 
> v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
> ---
>  drivers/phy/mediatek/phy-mtk-tphy.c | 405 +++++++++++++++++++++++++++-
>  1 file changed, 404 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
> index e906a82791bd..923e5ee119f3 100644
> --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> @@ -7,6 +7,7 @@
>  
>  #include <dt-bindings/phy/phy.h>
>  #include <linux/clk.h>
> +#include <linux/debugfs.h>
>  #include <linux/delay.h>
>  #include <linux/iopoll.h>
>  #include <linux/mfd/syscon.h>
> @@ -264,6 +265,8 @@
>  
>  #define TPHY_CLKS_CNT	2
>  
> +#define USER_BUF_LEN(count) min_t(size_t, 8, (count))
> +
>  enum mtk_phy_version {
>  	MTK_PHY_V1 = 1,
>  	MTK_PHY_V2,
> @@ -310,6 +313,7 @@ struct mtk_phy_instance {
>  	struct clk_bulk_data clks[TPHY_CLKS_CNT];
>  	u32 index;
>  	u32 type;
> +	struct dentry *dbgfs;
>  	struct regmap *type_sw;
>  	u32 type_sw_reg;
>  	u32 type_sw_index;
> @@ -332,10 +336,391 @@ struct mtk_tphy {
>  	const struct mtk_phy_pdata *pdata;
>  	struct mtk_phy_instance **phys;
>  	int nphys;
> +	struct dentry *dbgfs_root;
>  	int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */
>  	int src_coef; /* coefficient for slew rate calibrate */
>  };
>  
> +#if IS_ENABLED(CONFIG_DEBUG_FS)
> +
> +enum u2_phy_params {
> +	U2P_EYE_VRT = 0,
> +	U2P_EYE_TERM,
> +	U2P_EFUSE_EN,
> +	U2P_EFUSE_INTR,
> +	U2P_DISCTH,
> +	U2P_PRE_EMPHASIS,
> +};
> +
> +enum u3_phy_params {
> +	U3P_EFUSE_EN = 0,
> +	U3P_EFUSE_INTR,
> +	U3P_EFUSE_TX_IMP,
> +	U3P_EFUSE_RX_IMP,
> +};
> +
> +static const char *const u2_phy_files[] = {
> +	[U2P_EYE_VRT] = "vrt",
> +	[U2P_EYE_TERM] = "term",
> +	[U2P_EFUSE_EN] = "efuse",
> +	[U2P_EFUSE_INTR] = "intr",
> +	[U2P_DISCTH] = "discth",
> +	[U2P_PRE_EMPHASIS] = "preemph",
> +};
> +
> +static const char *const u3_phy_files[] = {
> +	[U3P_EFUSE_EN] = "efuse",
> +	[U3P_EFUSE_INTR] = "intr",
> +	[U3P_EFUSE_TX_IMP] = "tx-imp",
> +	[U3P_EFUSE_RX_IMP] = "rx-imp",
> +};
> +
> +static int u2_phy_params_show(struct seq_file *sf, void *unused)
> +{
> +	struct mtk_phy_instance *inst = sf->private;
> +	const char *fname = file_dentry(sf->file)->d_iname;
> +	struct u2phy_banks *u2_banks = &inst->u2_banks;
> +	void __iomem *com = u2_banks->com;
> +	u32 max = 0;
> +	u32 tmp = 0;
> +	u32 val = 0;
> +	int ret;
> +
> +	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
> +	if (ret < 0)
> +		return ret;
> +
> +	switch (ret) {
> +	case U2P_EYE_VRT:
> +		tmp = readl(com + U3P_USBPHYACR1);
> +		val = FIELD_GET(PA1_RG_VRT_SEL, tmp);
> +		max = FIELD_MAX(PA1_RG_VRT_SEL);
> +		break;
> +
> +	case U2P_EYE_TERM:
> +		tmp = readl(com + U3P_USBPHYACR1);
> +		val = FIELD_GET(PA1_RG_TERM_SEL, tmp);
> +		max = FIELD_MAX(PA1_RG_TERM_SEL);
> +		break;
> +
> +	case U2P_EFUSE_EN:
> +		if (u2_banks->misc) {
> +			tmp = readl(u2_banks->misc + U3P_MISC_REG1);
> +			max = 1;
> +		}
> +
> +		val = !!(tmp & MR1_EFUSE_AUTO_LOAD_DIS);
> +		break;
> +
> +	case U2P_EFUSE_INTR:
> +		tmp = readl(com + U3P_USBPHYACR1);
> +		val = FIELD_GET(PA1_RG_INTR_CAL, tmp);
> +		max = FIELD_MAX(PA1_RG_INTR_CAL);
> +		break;
> +
> +	case U2P_DISCTH:
> +		tmp = readl(com + U3P_USBPHYACR6);
> +		val = FIELD_GET(PA6_RG_U2_DISCTH, tmp);
> +		max = FIELD_MAX(PA6_RG_U2_DISCTH);
> +		break;
> +
> +	case U2P_PRE_EMPHASIS:
> +		tmp = readl(com + U3P_USBPHYACR6);
> +		val = FIELD_GET(PA6_RG_U2_PRE_EMP, tmp);
> +		max = FIELD_MAX(PA6_RG_U2_PRE_EMP);
> +		break;
> +
> +	default:
> +		seq_printf(sf, "invalid, %d\n", ret);
> +		break;
> +	}
> +
> +	seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
> +
> +	return 0;
> +}
> +
> +static int u2_phy_params_open(struct inode *inode, struct file *file)
> +{
> +	return single_open(file, u2_phy_params_show, inode->i_private);
> +}
> +
> +static ssize_t u2_phy_params_write(struct file *file, const char __user *ubuf,
> +				   size_t count, loff_t *ppos)
> +{
> +	const char *fname = file_dentry(file)->d_iname;
> +	struct seq_file *sf = file->private_data;
> +	struct mtk_phy_instance *inst = sf->private;
> +	struct u2phy_banks *u2_banks = &inst->u2_banks;
> +	void __iomem *com = u2_banks->com;
> +	ssize_t rc;
> +	u32 val;
> +	int ret;
> +
> +	rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
> +	if (rc)
> +		return rc;
> +
> +	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
> +	if (ret < 0)
> +		return (ssize_t)ret;
> +
> +	switch (ret) {
> +	case U2P_EYE_VRT:
> +		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_VRT_SEL, val);
> +		break;
> +
> +	case U2P_EYE_TERM:
> +		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_TERM_SEL, val);
> +		break;
> +
> +	case U2P_EFUSE_EN:
> +		if (u2_banks->misc)
> +			mtk_phy_update_field(u2_banks->misc + U3P_MISC_REG1,
> +					     MR1_EFUSE_AUTO_LOAD_DIS, !!val);
> +		break;
> +
> +	case U2P_EFUSE_INTR:
> +		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_INTR_CAL, val);
> +		break;
> +
> +	case U2P_DISCTH:
> +		mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_DISCTH, val);
> +		break;
> +
> +	case U2P_PRE_EMPHASIS:
> +		mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_PRE_EMP, val);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +
> +	return count;
> +}
> +
> +static const struct file_operations u2_phy_fops = {
> +	.open = u2_phy_params_open,
> +	.write = u2_phy_params_write,
> +	.read = seq_read,
> +	.llseek = seq_lseek,
> +	.release = single_release,
> +};
> +
> +static void u2_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
> +{
> +	u32 count = ARRAY_SIZE(u2_phy_files);
> +	int i;
> +
> +	for (i = 0; i < count; i++)
> +		debugfs_create_file(u2_phy_files[i], 0644, inst->dbgfs, inst, &u2_phy_fops);
> +}
> +
> +static int u3_phy_params_show(struct seq_file *sf, void *unused)
> +{
> +	struct mtk_phy_instance *inst = sf->private;
> +	const char *fname = file_dentry(sf->file)->d_iname;
> +	struct u3phy_banks *u3_banks = &inst->u3_banks;
> +	u32 val = 0;
> +	u32 max = 0;
> +	u32 tmp;
> +	int ret;
> +
> +	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
> +	if (ret < 0)
> +		return ret;
> +
> +	switch (ret) {
> +	case U3P_EFUSE_EN:
> +		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RSV);
> +		val = !!(tmp & P3D_RG_EFUSE_AUTO_LOAD_DIS);
> +		max = 1;
> +		break;
> +
> +	case U3P_EFUSE_INTR:
> +		tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG0);
> +		val = FIELD_GET(P3A_RG_IEXT_INTR, tmp);
> +		max = FIELD_MAX(P3A_RG_IEXT_INTR);
> +		break;
> +
> +	case U3P_EFUSE_TX_IMP:
> +		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL0);
> +		val = FIELD_GET(P3D_RG_TX_IMPEL, tmp);
> +		max = FIELD_MAX(P3D_RG_TX_IMPEL);
> +		break;
> +
> +	case U3P_EFUSE_RX_IMP:
> +		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL1);
> +		val = FIELD_GET(P3D_RG_RX_IMPEL, tmp);
> +		max = FIELD_MAX(P3D_RG_RX_IMPEL);
> +		break;
> +
> +	default:
> +		seq_printf(sf, "invalid, %d\n", ret);
> +		break;
> +	}
> +
> +	seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
> +
> +	return 0;
> +}
> +
> +static int u3_phy_params_open(struct inode *inode, struct file *file)
> +{
> +	return single_open(file, u3_phy_params_show, inode->i_private);
> +}
> +
> +static ssize_t u3_phy_params_write(struct file *file, const char __user *ubuf,
> +				   size_t count, loff_t *ppos)
> +{
> +	const char *fname = file_dentry(file)->d_iname;
> +	struct seq_file *sf = file->private_data;
> +	struct mtk_phy_instance *inst = sf->private;
> +	struct u3phy_banks *u3_banks = &inst->u3_banks;
> +	void __iomem *phyd = u3_banks->phyd;
> +	ssize_t rc;
> +	u32 val;
> +	int ret;
> +
> +	rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
> +	if (rc)
> +		return rc;
> +
> +	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
> +	if (ret < 0)
> +		return (ssize_t)ret;
> +
> +	switch (ret) {
> +	case U3P_EFUSE_EN:
> +		mtk_phy_update_field(phyd + U3P_U3_PHYD_RSV,
> +				     P3D_RG_EFUSE_AUTO_LOAD_DIS, !!val);
> +		break;
> +
> +	case U3P_EFUSE_INTR:
> +		mtk_phy_update_field(u3_banks->phya + U3P_U3_PHYA_REG0, P3A_RG_IEXT_INTR, val);
> +		break;
> +
> +	case U3P_EFUSE_TX_IMP:
> +		mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_TX_IMPEL, val);
> +		mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_FORCE_TX_IMPEL);
> +		break;
> +
> +	case U3P_EFUSE_RX_IMP:
> +		mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_RX_IMPEL, val);
> +		mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_FORCE_RX_IMPEL);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +
> +	return count;
> +}
> +
> +static const struct file_operations u3_phy_fops = {
> +	.open = u3_phy_params_open,
> +	.write = u3_phy_params_write,
> +	.read = seq_read,
> +	.llseek = seq_lseek,
> +	.release = single_release,
> +};
> +
> +static void u3_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
> +{
> +	u32 count = ARRAY_SIZE(u3_phy_files);
> +	int i;
> +
> +	for (i = 0; i < count; i++)
> +		debugfs_create_file(u3_phy_files[i], 0644, inst->dbgfs, inst, &u3_phy_fops);
> +}
> +
> +static int tphy_type_show(struct seq_file *sf, void *unused)
> +{
> +	struct mtk_phy_instance *inst = sf->private;
> +	const char *type;
> +
> +	switch (inst->type) {
> +	case PHY_TYPE_USB2:
> +		type = "USB2";
> +		break;
> +	case PHY_TYPE_USB3:
> +		type = "USB3";
> +		break;
> +	case PHY_TYPE_PCIE:
> +		type = "PCIe";
> +		break;
> +	case PHY_TYPE_SGMII:
> +		type = "SGMII";
> +		break;
> +	case PHY_TYPE_SATA:
> +		type = "SATA";
> +		break;
> +	default:
> +		type = "";
> +	}
> +
> +	seq_printf(sf, "%s\n", type);
> +
> +	return 0;
> +}
> +
> +DEFINE_SHOW_ATTRIBUTE(tphy_type);
> +
> +static void tphy_debugfs_init(struct mtk_tphy *tphy, struct mtk_phy_instance *inst)
> +{
> +	char name[16];
> +
> +	snprintf(name, sizeof(name) - 1, "phy.%d", inst->index);

I wouold suggest driver name/ device name rather than phy.foo... again
folks needs to see what is foo


> +	inst->dbgfs = debugfs_create_dir(name, tphy->dbgfs_root);
> +
> +	debugfs_create_file("type", 0444, inst->dbgfs, inst, &tphy_type_fops);
> +
> +	switch (inst->type) {
> +	case PHY_TYPE_USB2:
> +		u2_phy_dbgfs_files_create(inst);
> +		break;
> +	case PHY_TYPE_USB3:
> +	case PHY_TYPE_PCIE:
> +		u3_phy_dbgfs_files_create(inst);
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
> +static void tphy_debugfs_exit(struct mtk_phy_instance *inst)
> +{
> +	debugfs_remove_recursive(inst->dbgfs);
> +	inst->dbgfs = NULL;
> +}
> +
> +static void tphy_debugfs_root_create(struct mtk_tphy *tphy)
> +{
> +	tphy->dbgfs_root = debugfs_create_dir(dev_name(tphy->dev), phy_debug_root);
> +}
> +
> +static void tphy_debugfs_root_remove(struct mtk_tphy *tphy)
> +{
> +	debugfs_remove_recursive(tphy->dbgfs_root);
> +	tphy->dbgfs_root = NULL;
> +}
> +
> +#else
> +
> +static void tphy_debugfs_init(struct mtk_tphy *tphy, struct mtk_phy_instance *inst)
> +{}
> +
> +static void tphy_debugfs_exit(struct mtk_phy_instance *inst)
> +{}
> +
> +static void tphy_debugfs_root_create(struct mtk_tphy *tphy)
> +{}
> +
> +static void tphy_debugfs_root_remove(struct mtk_tphy *tphy)
> +{}
> +
> +#endif
> +
>  static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
>  	struct mtk_phy_instance *instance)
>  {
> @@ -1032,6 +1417,8 @@ static int mtk_phy_init(struct phy *phy)
>  		return -EINVAL;
>  	}
>  
> +	tphy_debugfs_init(tphy, instance);
> +
>  	return 0;
>  }
>  
> @@ -1068,6 +1455,8 @@ static int mtk_phy_exit(struct phy *phy)
>  	struct mtk_phy_instance *instance = phy_get_drvdata(phy);
>  	struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
>  
> +	tphy_debugfs_exit(instance);
> +
>  	if (instance->type == PHY_TYPE_USB2)
>  		u2_phy_instance_exit(tphy, instance);
>  
> @@ -1295,15 +1684,29 @@ static int mtk_tphy_probe(struct platform_device *pdev)
>  	}
>  
>  	provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);
> +	if (IS_ERR(provider))
> +		return dev_err_probe(dev, PTR_ERR(provider), "probe failed\n");
> +
> +	tphy_debugfs_root_create(tphy);
> +	return 0;
>  
> -	return PTR_ERR_OR_ZERO(provider);
>  put_child:
>  	of_node_put(child_np);
>  	return retval;
>  }
>  
> +static int mtk_tphy_remove(struct platform_device *pdev)
> +{
> +	struct mtk_tphy *tphy;
> +
> +	tphy = platform_get_drvdata(pdev);
> +	tphy_debugfs_root_remove(tphy);
> +	return 0;
> +}
> +
>  static struct platform_driver mtk_tphy_driver = {
>  	.probe		= mtk_tphy_probe,
> +	.remove		= mtk_tphy_remove,
>  	.driver		= {
>  		.name	= "mtk-tphy",
>  		.of_match_table = mtk_tphy_id_table,
> -- 
> 2.18.0
Chunfeng Yun Jan. 16, 2023, 7:27 a.m. UTC | #2 
On Fri, 2023-01-13 at 23:45 +0530, Vinod Koul wrote:
> On 04-01-23, 21:26, Chunfeng Yun wrote:
> > These debugfs files are mainly used to make eye diagram test
> > easier,
> > especially helpful to do HQA test for a new IC without efuse
> > enabled.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> > v6: no changes
> > 
> > v5: using common debugfs config CONFIG_DEBUG_FS
> > 
> > v4: fix build warning of sometimes uninitialized variable
> > 
> > v3: fix typo of "debugfs" suggested by AngeloGioacchino
> > 
> > v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
> > ---
> >  drivers/phy/mediatek/phy-mtk-tphy.c | 405
> > +++++++++++++++++++++++++++-
> >  1 file changed, 404 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> > b/drivers/phy/mediatek/phy-mtk-tphy.c
> > index e906a82791bd..923e5ee119f3 100644
> > --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> > +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> > @@ -7,6 +7,7 @@
> >  
> >  #include <dt-bindings/phy/phy.h>
> >  #include <linux/clk.h>
> > +#include <linux/debugfs.h>
> >  #include <linux/delay.h>
> >  #include <linux/iopoll.h>
> >  #include <linux/mfd/syscon.h>
> > @@ -264,6 +265,8 @@
> >  
> >  #define TPHY_CLKS_CNT	2
> >  
> > +#define USER_BUF_LEN(count) min_t(size_t, 8, (count))
> > +
> >  enum mtk_phy_version {
> >  	MTK_PHY_V1 = 1,
> >  	MTK_PHY_V2,
> > @@ -310,6 +313,7 @@ struct mtk_phy_instance {
> >  	struct clk_bulk_data clks[TPHY_CLKS_CNT];
> >  	u32 index;
> >  	u32 type;
> > +	struct dentry *dbgfs;
> >  	struct regmap *type_sw;
> >  	u32 type_sw_reg;
> >  	u32 type_sw_index;
> > @@ -332,10 +336,391 @@ struct mtk_tphy {
> >  	const struct mtk_phy_pdata *pdata;
> >  	struct mtk_phy_instance **phys;
> >  	int nphys;
> > +	struct dentry *dbgfs_root;
> >  	int src_ref_clk; /* MHZ, reference clock for slew rate
> > calibrate */
> >  	int src_coef; /* coefficient for slew rate calibrate */
> >  };
> >  
> > +#if IS_ENABLED(CONFIG_DEBUG_FS)
> > +
> > 
> > <skip>
> > 
> > +
> > +DEFINE_SHOW_ATTRIBUTE(tphy_type);
> > +
> > +static void tphy_debugfs_init(struct mtk_tphy *tphy, struct
> > mtk_phy_instance *inst)
> > +{
> > +	char name[16];
> > +
> > +	snprintf(name, sizeof(name) - 1, "phy.%d", inst->index);
> 
> I wouold suggest driver name/ device name rather than phy.foo...
> again
> folks needs to see what is foo
Ok, I'll change it, thanks a lot

> 
> <skip>
> > 
> >  static struct platform_driver mtk_tphy_driver = {
> >  	.probe		= mtk_tphy_probe,
> > +	.remove		= mtk_tphy_remove,
> >  	.driver		= {
> >  		.name	= "mtk-tphy",
> >  		.of_match_table = mtk_tphy_id_table,
> > -- 
> > 2.18.0
> 
>
Chunfeng Yun Jan. 17, 2023, 9:17 a.m. UTC | #3 
On Fri, 2023-01-13 at 23:45 +0530, Vinod Koul wrote:
> On 04-01-23, 21:26, Chunfeng Yun wrote:
> > These debugfs files are mainly used to make eye diagram test
> > easier,
> > especially helpful to do HQA test for a new IC without efuse
> > enabled.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> > v6: no changes
> > 
> > v5: using common debugfs config CONFIG_DEBUG_FS
> > 
> > v4: fix build warning of sometimes uninitialized variable
> > 
> > v3: fix typo of "debugfs" suggested by AngeloGioacchino
> > 
> > v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
> > ---
> >  drivers/phy/mediatek/phy-mtk-tphy.c | 405
> > +++++++++++++++++++++++++++-
> >  1 file changed, 404 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> > b/drivers/phy/mediatek/phy-mtk-tphy.c
> > index e906a82791bd..923e5ee119f3 100644
> > --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> > +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> > @@ -7,6 +7,7 @@
> >  <skip>
> > +
> > +static void tphy_debugfs_init(struct mtk_tphy *tphy, struct
> > mtk_phy_instance *inst)
> > +{
> > +	char name[16];
> > +
> > +	snprintf(name, sizeof(name) - 1, "phy.%d", inst->index);
> 
> I wouold suggest driver name/ device name rather than phy.foo...
> again
> folks needs to see what is foo
> 
The driver creates a root folder by its device name, e.g. 
t-phy@11290000, it has two subphy, when use dev_name(&phy->dev) to
create folder for each phy, it will be:

# ls /sys/kernel/debug/phy/t-phy@11290000/
phy-t-phy@11290000.0  phy-t-phy@11290000.1

the phy's device name is created by
"dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id)"

dev_name(dev) is the parent name, it's t-phy@11290000 in example,
id is the phy->id.

due to the root folder already provide its parent device name, seems no
need provide it again in each phy's folder.

How about create the phy's folder by : "snprintf(name, sizeof(name) -
1, "phy-%d", inst->phy->id);"

then it becomes as below, seems brief:
# ls /sys/kernel/debug/phy/t-phy@11290000/
phy-0  phy-1

Thanks a lot

> 
> > +	inst->dbgfs = debugfs_create_dir(name, tphy->dbgfs_root);
> > +
> > +	debugfs_create_file("type", 0444, inst->dbgfs, inst,
> > &tphy_type_fops);
> > +
> > +	switch (inst->type) {
> > +	case PHY_TYPE_USB2:
> > +		u2_phy_dbgfs_files_create(inst);
> > +		break;
> > +	case PHY_TYPE_USB3:
> > +	case PHY_TYPE_PCIE:
> > +		u3_phy_dbgfs_files_create(inst);
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
<skip>
Chunfeng Yun Jan. 18, 2023, 2:02 a.m. UTC | #4 
On Fri, 2023-01-13 at 23:45 +0530, Vinod Koul wrote:
> On 04-01-23, 21:26, Chunfeng Yun wrote:
> > These debugfs files are mainly used to make eye diagram test
> > easier,
> > especially helpful to do HQA test for a new IC without efuse
> > enabled.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> > v6: no changes
> > 
> > v5: using common debugfs config CONFIG_DEBUG_FS
> > 
> > v4: fix build warning of sometimes uninitialized variable
> > 
> > v3: fix typo of "debugfs" suggested by AngeloGioacchino
> > 
> > v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
> > ---
> >  drivers/phy/mediatek/phy-mtk-tphy.c | 405
> > +++++++++++++++++++++++++++-
> >  1 file changed, 404 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> > b/drivers/phy/mediatek/phy-mtk-tphy.c
> > index e906a82791bd..923e5ee119f3 100644
> > --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> > +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> > @@ -7,6 +7,7 @@
> >  
> >  #include <dt-bindings/phy/phy.h>
> >  #include <linux/clk.h>
> > +#include <linux/debugfs.h>
> >  #include <linux/delay.h>
> >  #include <linux/iopoll.h>
> >  #include <linux/mfd/syscon.h>
> > @@ -264,6 +265,8 @@
> >  <skip>

> > +
> > +static void tphy_debugfs_init(struct mtk_tphy *tphy, struct
> > mtk_phy_instance *inst)
> > +{
> > +	char name[16];
> > +
> > +	snprintf(name, sizeof(name) - 1, "phy.%d", inst->index);
> 
> I wouold suggest driver name/ device name rather than phy.foo...
> again
> folks needs to see what is foo
> 
I compare the way you suggested again on mt2712 platform that have two
phy controller, t-phy@11290000 [1] and t-phy@112e0000 [2],
[1]: 
https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/mediatek/mt2712e.dtsi#L827
[2]:

https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/mediatek/mt2712e.dtsi#L891


Each phy controller driver will created a root folder according its
device name under "/sys/kernel/debug/phy", like as:
#ls /sys/kernel/debug/phy
t-phy@11290000  t-phy@112e0000

The phy controller has some subphy node, each one indicate a phy
struct, if use the phy device name to create a folder, it shows as
below:
#cd /sys/kernel/debug/phy
# ls *
t-phy@11290000:
phy-t-phy@11290000.0  phy-t-phy@11290000.1

t-phy@112e0000:
phy-t-phy@112e0000.3  phy-t-phy@112e0000.4  phy-t-phy@112e0000.5

phy's device name is created as:
"dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id)"

dev_name(dev) is the parent name, it's t-phy@11290000 and 
t-phy@112e0000 in example, id is the phy->id.

seems no need to provide parent name again.
another problem is that the id may vary if other phys are enabled, that
means the path may vary, it's difficult to write scripts to do test.

when use the current way,
"snprintf(name, sizeof(name) - 1, "phy.%d", inst->index)"
it shows as:
# ls *
t-phy@11290000:
phy.0  phy.1

t-phy@112e0000:
phy.0  phy.1  phy.2

@inst->index is the sequence number of subphy node in each phy
controller's node, when the dts is fixed, the @index is also fixed,
then for each phy, the path is also fixed, seems more convenient to
write scripts.

So I prefer to leave the code unchanged.

Thanks a lot

> 
> > +	inst->dbgfs = debugfs_create_dir(name, tphy->dbgfs_root);
> > +
> > +	debugfs_create_file("type", 0444, inst->dbgfs, inst,
> > &tphy_type_fops);
> > +
> > +	switch (inst->type) {
> > +	case PHY_TYPE_USB2:
> > +		u2_phy_dbgfs_files_create(inst);
> > +		break;
> > +	case PHY_TYPE_USB3:
> > +	case PHY_TYPE_PCIE:
> > +		u3_phy_dbgfs_files_create(inst);
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +static void tphy_debugfs_exit(struct mtk_phy_instance *inst)
> > +{
> > +	debugfs_remove_recursive(inst->dbgfs);
> > +	inst->dbgfs = NULL;
> > +}
> > +
> > +static void tphy_debugfs_root_create(struct mtk_tphy *tphy)
> > +{
> > +	tphy->dbgfs_root = debugfs_create_dir(dev_name(tphy->dev),
> > phy_debug_root);
> > +}
> > +
> > +static void tphy_debugfs_root_remove(struct mtk_tphy *tphy)
> > +{
> > +	debugfs_remove_recursive(tphy->dbgfs_root);
> > +	tphy->dbgfs_root = NULL;
> > +}
> > +
> > +#else
> > +<skip>
diff mbox series

Patch

diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index e906a82791bd..923e5ee119f3 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -7,6 +7,7 @@ 
 
 #include <dt-bindings/phy/phy.h>
 #include <linux/clk.h>
+#include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/iopoll.h>
 #include <linux/mfd/syscon.h>
@@ -264,6 +265,8 @@ 
 
 #define TPHY_CLKS_CNT	2
 
+#define USER_BUF_LEN(count) min_t(size_t, 8, (count))
+
 enum mtk_phy_version {
 	MTK_PHY_V1 = 1,
 	MTK_PHY_V2,
@@ -310,6 +313,7 @@  struct mtk_phy_instance {
 	struct clk_bulk_data clks[TPHY_CLKS_CNT];
 	u32 index;
 	u32 type;
+	struct dentry *dbgfs;
 	struct regmap *type_sw;
 	u32 type_sw_reg;
 	u32 type_sw_index;
@@ -332,10 +336,391 @@  struct mtk_tphy {
 	const struct mtk_phy_pdata *pdata;
 	struct mtk_phy_instance **phys;
 	int nphys;
+	struct dentry *dbgfs_root;
 	int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */
 	int src_coef; /* coefficient for slew rate calibrate */
 };
 
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+
+enum u2_phy_params {
+	U2P_EYE_VRT = 0,
+	U2P_EYE_TERM,
+	U2P_EFUSE_EN,
+	U2P_EFUSE_INTR,
+	U2P_DISCTH,
+	U2P_PRE_EMPHASIS,
+};
+
+enum u3_phy_params {
+	U3P_EFUSE_EN = 0,
+	U3P_EFUSE_INTR,
+	U3P_EFUSE_TX_IMP,
+	U3P_EFUSE_RX_IMP,
+};
+
+static const char *const u2_phy_files[] = {
+	[U2P_EYE_VRT] = "vrt",
+	[U2P_EYE_TERM] = "term",
+	[U2P_EFUSE_EN] = "efuse",
+	[U2P_EFUSE_INTR] = "intr",
+	[U2P_DISCTH] = "discth",
+	[U2P_PRE_EMPHASIS] = "preemph",
+};
+
+static const char *const u3_phy_files[] = {
+	[U3P_EFUSE_EN] = "efuse",
+	[U3P_EFUSE_INTR] = "intr",
+	[U3P_EFUSE_TX_IMP] = "tx-imp",
+	[U3P_EFUSE_RX_IMP] = "rx-imp",
+};
+
+static int u2_phy_params_show(struct seq_file *sf, void *unused)
+{
+	struct mtk_phy_instance *inst = sf->private;
+	const char *fname = file_dentry(sf->file)->d_iname;
+	struct u2phy_banks *u2_banks = &inst->u2_banks;
+	void __iomem *com = u2_banks->com;
+	u32 max = 0;
+	u32 tmp = 0;
+	u32 val = 0;
+	int ret;
+
+	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+	if (ret < 0)
+		return ret;
+
+	switch (ret) {
+	case U2P_EYE_VRT:
+		tmp = readl(com + U3P_USBPHYACR1);
+		val = FIELD_GET(PA1_RG_VRT_SEL, tmp);
+		max = FIELD_MAX(PA1_RG_VRT_SEL);
+		break;
+
+	case U2P_EYE_TERM:
+		tmp = readl(com + U3P_USBPHYACR1);
+		val = FIELD_GET(PA1_RG_TERM_SEL, tmp);
+		max = FIELD_MAX(PA1_RG_TERM_SEL);
+		break;
+
+	case U2P_EFUSE_EN:
+		if (u2_banks->misc) {
+			tmp = readl(u2_banks->misc + U3P_MISC_REG1);
+			max = 1;
+		}
+
+		val = !!(tmp & MR1_EFUSE_AUTO_LOAD_DIS);
+		break;
+
+	case U2P_EFUSE_INTR:
+		tmp = readl(com + U3P_USBPHYACR1);
+		val = FIELD_GET(PA1_RG_INTR_CAL, tmp);
+		max = FIELD_MAX(PA1_RG_INTR_CAL);
+		break;
+
+	case U2P_DISCTH:
+		tmp = readl(com + U3P_USBPHYACR6);
+		val = FIELD_GET(PA6_RG_U2_DISCTH, tmp);
+		max = FIELD_MAX(PA6_RG_U2_DISCTH);
+		break;
+
+	case U2P_PRE_EMPHASIS:
+		tmp = readl(com + U3P_USBPHYACR6);
+		val = FIELD_GET(PA6_RG_U2_PRE_EMP, tmp);
+		max = FIELD_MAX(PA6_RG_U2_PRE_EMP);
+		break;
+
+	default:
+		seq_printf(sf, "invalid, %d\n", ret);
+		break;
+	}
+
+	seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
+
+	return 0;
+}
+
+static int u2_phy_params_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, u2_phy_params_show, inode->i_private);
+}
+
+static ssize_t u2_phy_params_write(struct file *file, const char __user *ubuf,
+				   size_t count, loff_t *ppos)
+{
+	const char *fname = file_dentry(file)->d_iname;
+	struct seq_file *sf = file->private_data;
+	struct mtk_phy_instance *inst = sf->private;
+	struct u2phy_banks *u2_banks = &inst->u2_banks;
+	void __iomem *com = u2_banks->com;
+	ssize_t rc;
+	u32 val;
+	int ret;
+
+	rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
+	if (rc)
+		return rc;
+
+	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+	if (ret < 0)
+		return (ssize_t)ret;
+
+	switch (ret) {
+	case U2P_EYE_VRT:
+		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_VRT_SEL, val);
+		break;
+
+	case U2P_EYE_TERM:
+		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_TERM_SEL, val);
+		break;
+
+	case U2P_EFUSE_EN:
+		if (u2_banks->misc)
+			mtk_phy_update_field(u2_banks->misc + U3P_MISC_REG1,
+					     MR1_EFUSE_AUTO_LOAD_DIS, !!val);
+		break;
+
+	case U2P_EFUSE_INTR:
+		mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_INTR_CAL, val);
+		break;
+
+	case U2P_DISCTH:
+		mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_DISCTH, val);
+		break;
+
+	case U2P_PRE_EMPHASIS:
+		mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_PRE_EMP, val);
+		break;
+
+	default:
+		break;
+	}
+
+	return count;
+}
+
+static const struct file_operations u2_phy_fops = {
+	.open = u2_phy_params_open,
+	.write = u2_phy_params_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void u2_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
+{
+	u32 count = ARRAY_SIZE(u2_phy_files);
+	int i;
+
+	for (i = 0; i < count; i++)
+		debugfs_create_file(u2_phy_files[i], 0644, inst->dbgfs, inst, &u2_phy_fops);
+}
+
+static int u3_phy_params_show(struct seq_file *sf, void *unused)
+{
+	struct mtk_phy_instance *inst = sf->private;
+	const char *fname = file_dentry(sf->file)->d_iname;
+	struct u3phy_banks *u3_banks = &inst->u3_banks;
+	u32 val = 0;
+	u32 max = 0;
+	u32 tmp;
+	int ret;
+
+	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+	if (ret < 0)
+		return ret;
+
+	switch (ret) {
+	case U3P_EFUSE_EN:
+		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RSV);
+		val = !!(tmp & P3D_RG_EFUSE_AUTO_LOAD_DIS);
+		max = 1;
+		break;
+
+	case U3P_EFUSE_INTR:
+		tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG0);
+		val = FIELD_GET(P3A_RG_IEXT_INTR, tmp);
+		max = FIELD_MAX(P3A_RG_IEXT_INTR);
+		break;
+
+	case U3P_EFUSE_TX_IMP:
+		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL0);
+		val = FIELD_GET(P3D_RG_TX_IMPEL, tmp);
+		max = FIELD_MAX(P3D_RG_TX_IMPEL);
+		break;
+
+	case U3P_EFUSE_RX_IMP:
+		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL1);
+		val = FIELD_GET(P3D_RG_RX_IMPEL, tmp);
+		max = FIELD_MAX(P3D_RG_RX_IMPEL);
+		break;
+
+	default:
+		seq_printf(sf, "invalid, %d\n", ret);
+		break;
+	}
+
+	seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
+
+	return 0;
+}
+
+static int u3_phy_params_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, u3_phy_params_show, inode->i_private);
+}
+
+static ssize_t u3_phy_params_write(struct file *file, const char __user *ubuf,
+				   size_t count, loff_t *ppos)
+{
+	const char *fname = file_dentry(file)->d_iname;
+	struct seq_file *sf = file->private_data;
+	struct mtk_phy_instance *inst = sf->private;
+	struct u3phy_banks *u3_banks = &inst->u3_banks;
+	void __iomem *phyd = u3_banks->phyd;
+	ssize_t rc;
+	u32 val;
+	int ret;
+
+	rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
+	if (rc)
+		return rc;
+
+	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+	if (ret < 0)
+		return (ssize_t)ret;
+
+	switch (ret) {
+	case U3P_EFUSE_EN:
+		mtk_phy_update_field(phyd + U3P_U3_PHYD_RSV,
+				     P3D_RG_EFUSE_AUTO_LOAD_DIS, !!val);
+		break;
+
+	case U3P_EFUSE_INTR:
+		mtk_phy_update_field(u3_banks->phya + U3P_U3_PHYA_REG0, P3A_RG_IEXT_INTR, val);
+		break;
+
+	case U3P_EFUSE_TX_IMP:
+		mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_TX_IMPEL, val);
+		mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_FORCE_TX_IMPEL);
+		break;
+
+	case U3P_EFUSE_RX_IMP:
+		mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_RX_IMPEL, val);
+		mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_FORCE_RX_IMPEL);
+		break;
+
+	default:
+		break;
+	}
+
+	return count;
+}
+
+static const struct file_operations u3_phy_fops = {
+	.open = u3_phy_params_open,
+	.write = u3_phy_params_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void u3_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
+{
+	u32 count = ARRAY_SIZE(u3_phy_files);
+	int i;
+
+	for (i = 0; i < count; i++)
+		debugfs_create_file(u3_phy_files[i], 0644, inst->dbgfs, inst, &u3_phy_fops);
+}
+
+static int tphy_type_show(struct seq_file *sf, void *unused)
+{
+	struct mtk_phy_instance *inst = sf->private;
+	const char *type;
+
+	switch (inst->type) {
+	case PHY_TYPE_USB2:
+		type = "USB2";
+		break;
+	case PHY_TYPE_USB3:
+		type = "USB3";
+		break;
+	case PHY_TYPE_PCIE:
+		type = "PCIe";
+		break;
+	case PHY_TYPE_SGMII:
+		type = "SGMII";
+		break;
+	case PHY_TYPE_SATA:
+		type = "SATA";
+		break;
+	default:
+		type = "";
+	}
+
+	seq_printf(sf, "%s\n", type);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(tphy_type);
+
+static void tphy_debugfs_init(struct mtk_tphy *tphy, struct mtk_phy_instance *inst)
+{
+	char name[16];
+
+	snprintf(name, sizeof(name) - 1, "phy.%d", inst->index);
+	inst->dbgfs = debugfs_create_dir(name, tphy->dbgfs_root);
+
+	debugfs_create_file("type", 0444, inst->dbgfs, inst, &tphy_type_fops);
+
+	switch (inst->type) {
+	case PHY_TYPE_USB2:
+		u2_phy_dbgfs_files_create(inst);
+		break;
+	case PHY_TYPE_USB3:
+	case PHY_TYPE_PCIE:
+		u3_phy_dbgfs_files_create(inst);
+		break;
+	default:
+		break;
+	}
+}
+
+static void tphy_debugfs_exit(struct mtk_phy_instance *inst)
+{
+	debugfs_remove_recursive(inst->dbgfs);
+	inst->dbgfs = NULL;
+}
+
+static void tphy_debugfs_root_create(struct mtk_tphy *tphy)
+{
+	tphy->dbgfs_root = debugfs_create_dir(dev_name(tphy->dev), phy_debug_root);
+}
+
+static void tphy_debugfs_root_remove(struct mtk_tphy *tphy)
+{
+	debugfs_remove_recursive(tphy->dbgfs_root);
+	tphy->dbgfs_root = NULL;
+}
+
+#else
+
+static void tphy_debugfs_init(struct mtk_tphy *tphy, struct mtk_phy_instance *inst)
+{}
+
+static void tphy_debugfs_exit(struct mtk_phy_instance *inst)
+{}
+
+static void tphy_debugfs_root_create(struct mtk_tphy *tphy)
+{}
+
+static void tphy_debugfs_root_remove(struct mtk_tphy *tphy)
+{}
+
+#endif
+
 static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
 	struct mtk_phy_instance *instance)
 {
@@ -1032,6 +1417,8 @@  static int mtk_phy_init(struct phy *phy)
 		return -EINVAL;
 	}
 
+	tphy_debugfs_init(tphy, instance);
+
 	return 0;
 }
 
@@ -1068,6 +1455,8 @@  static int mtk_phy_exit(struct phy *phy)
 	struct mtk_phy_instance *instance = phy_get_drvdata(phy);
 	struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
 
+	tphy_debugfs_exit(instance);
+
 	if (instance->type == PHY_TYPE_USB2)
 		u2_phy_instance_exit(tphy, instance);
 
@@ -1295,15 +1684,29 @@  static int mtk_tphy_probe(struct platform_device *pdev)
 	}
 
 	provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);
+	if (IS_ERR(provider))
+		return dev_err_probe(dev, PTR_ERR(provider), "probe failed\n");
+
+	tphy_debugfs_root_create(tphy);
+	return 0;
 
-	return PTR_ERR_OR_ZERO(provider);
 put_child:
 	of_node_put(child_np);
 	return retval;
 }
 
+static int mtk_tphy_remove(struct platform_device *pdev)
+{
+	struct mtk_tphy *tphy;
+
+	tphy = platform_get_drvdata(pdev);
+	tphy_debugfs_root_remove(tphy);
+	return 0;
+}
+
 static struct platform_driver mtk_tphy_driver = {
 	.probe		= mtk_tphy_probe,
+	.remove		= mtk_tphy_remove,
 	.driver		= {
 		.name	= "mtk-tphy",
 		.of_match_table = mtk_tphy_id_table,