Re: [PATCH v2 2/2] phy: mediatek: tphy: add debugfs files

From: Chunfeng Yun
Date: Mon Oct 10 2022 - 04:01:42 EST


On Thu, 2022-10-06 at 16:54 +0200, AngeloGioacchino Del Regno wrote:
> Il 06/10/22 16:42, Chunfeng Yun ha scritto:
> > On Thu, 2022-09-29 at 11:02 +0200, AngeloGioacchino Del Regno
> > wrote:
> > > Il 29/09/22 10:09, Chunfeng Yun ha scritto:
> > > > 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@xxxxxxxxxxxx>
> > > > ---
> > > > v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by
> > > > AngeloGioacchino
> > > > ---
> > > > drivers/phy/mediatek/Kconfig | 5 +
> > > > drivers/phy/mediatek/phy-mtk-tphy.c | 403
> > > > +++++++++++++++++++++++++++-
> > > > 2 files changed, 407 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/phy/mediatek/Kconfig
> > > > b/drivers/phy/mediatek/Kconfig
> > > > index 3125ecb5d119..e9fdfe9f519f 100644
> > > > --- a/drivers/phy/mediatek/Kconfig
> > > > +++ b/drivers/phy/mediatek/Kconfig
> > > > @@ -27,6 +27,11 @@ config PHY_MTK_TPHY
> > > > multi-ports is first version, otherwise is second
> > > > version,
> > > > so you can easily distinguish them by banks layout.
> > > >
> > > > +config PHY_MTK_TPHY_DEBUGFS
> > > > + bool "Add T-PHY Debugfs Files"
> > > > + help
> > > > + Say Y here to add debugfs files mainly for T-PHY HQA
> > > > test.
> > > > +
> > > > config PHY_MTK_UFS
> > > > tristate "MediaTek UFS M-PHY driver"
> > > > depends on ARCH_MEDIATEK || COMPILE_TEST
> > > > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> > > > b/drivers/phy/mediatek/phy-mtk-tphy.c
> > > > index e906a82791bd..d9509e1314a4 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;
> > >
> > > Unused when !IS_ENABLED(CONFIG_PHY_MTK_TPHY_DEBUGFS)
> >
> > Yes, it will be NULL.
> >
>
> I was meaning that you should ifdef that out...
That's no side-effect, but just wastes some bytes, leave it unchanged


>
> Regards,
> Angelo
>
> > >
> > > > struct regmap *type_sw;
> > > > u32 type_sw_reg;
> > > > u32 type_sw_index;
> > > > @@ -332,10 +336,389 @@ struct mtk_tphy {
> > > > const struct mtk_phy_pdata *pdata;
> > > > struct mtk_phy_instance **phys;
> > > > int nphys;
> > > > + struct dentry *dbgfs_root;
> > >
> > > Same here
> > >
> > > > int src_ref_clk; /* MHZ, reference clock for slew rate
> > > > calibrate */
> > > > int src_coef; /* coefficient for slew rate calibrate */
> > > > };
> > > >
> > > > +#if IS_ENABLED(CONFIG_PHY_MTK_TPHY_DEBUGFS)
> > > > +
> > >
> > > ..snip..
> > >
> > > > +
> > > > +static void tphy_debufs_init(struct mtk_tphy *tphy, struct
> > > > mtk_phy_instance *inst)
> > >
> > > Please fix typo "debufs" -> "debugfs",
> >
> > Will fix it, thanks a lot
> >
> > > here and everywhere else.
> > >
> > > Apart from that, it looks good to me.
> > >
> > > Regards,
> > > Angelo
>
>