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Message-ID:
<OSBPR01MB2775A5EE446F4650B7A16997FFE32@OSBPR01MB2775.jpnprd01.prod.outlook.com>
Date: Fri, 24 Jan 2025 18:31:43 +0000
From: John Madieu <john.madieu.xa@...renesas.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
CC: "krzk+dt@...nel.org" <krzk+dt@...nel.org>, "robh@...nel.org"
<robh@...nel.org>, Biju Das <biju.das.jz@...renesas.com>, Claudiu Beznea
<claudiu.beznea.uj@...renesas.com>, "conor+dt@...nel.org"
<conor+dt@...nel.org>, "devicetree@...r.kernel.org"
<devicetree@...r.kernel.org>, "john.madieu@...il.com"
<john.madieu@...il.com>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "linux-renesas-soc@...r.kernel.org"
<linux-renesas-soc@...r.kernel.org>, "magnus.damm@...il.com"
<magnus.damm@...il.com>
Subject: RE: [PATCH v4 5/9] soc: renesas: rz-sysc: Move RZ/V2H SoC detection
to the SYS driver
> -----Original Message-----
> From: Geert Uytterhoeven <geert@...ux-m68k.org>
> Sent: Friday, January 24, 2025 3:21 PM
> Subject: Re: [PATCH v4 5/9] soc: renesas: rz-sysc: Move RZ/V2H SoC
> detection to the SYS driver
>
Hi Geert,
Thanks for your review.
> Hi John,
>
> On Thu, Jan 23, 2025 at 6:05 PM John Madieu
> <john.madieu.xa@...renesas.com> wrote:
> > As per the other SoC variant of the same family, the system controller
> > provides SoC ID in its own registers.
> >
> > Signed-off-by: John Madieu <john.madieu.xa@...renesas.com>
>
> Thanks for your patch!
>
> > --- a/drivers/soc/renesas/Kconfig
> > +++ b/drivers/soc/renesas/Kconfig
> > @@ -355,6 +355,7 @@ config ARCH_R9A09G047 config ARCH_R9A09G057
> > bool "ARM64 Platform support for RZ/V2H(P)"
> > select RENESAS_RZV2H_ICU
> > + select SYS_R9A09G057
> > help
> > This enables support for the Renesas RZ/V2H(P) SoC variants.
> >
> > @@ -395,4 +396,8 @@ config SYSC_R9A08G045 config SYS_R9A09G047
> > bool "Renesas RZ/G3E System controller support" if COMPILE_TEST
> > select SYSC_RZ
> > +
> > +config SYS_R9A09G057
> > + bool "Renesas RZ/V2H System controller support" if COMPILE_TEST
> > + select SYSC_RZ
>
> Please add a blank line here.
>
Will do in v5.
> > endif # SOC_RENESAS
>
> > --- a/drivers/soc/renesas/r9a09g047-sys.c
> > +++ b/drivers/soc/renesas/r9a09g047-sys.c
> > @@ -11,25 +11,11 @@
> > #include <linux/io.h>
> >
> > #include "rz-sysc.h"
> > +#include "rzg3e-sys.h"
> >
> > -/* Register Offsets */
> > -#define SYS_LSI_MODE 0x300
> > -/*
> > - * BOOTPLLCA[1:0]
> > - * [0,0] => 1.1GHZ
> > - * [0,1] => 1.5GHZ
> > - * [1,0] => 1.6GHZ
> > - * [1,1] => 1.7GHZ
> > - */
> > -#define SYS_LSI_MODE_STAT_BOOTPLLCA55 GENMASK(12, 11)
> > -#define SYS_LSI_MODE_CA55_1_7GHZ 0x3
> > -#define SYS_LSI_DEVID 0x304
> > -#define SYS_LSI_DEVID_REV GENMASK(31, 28)
> > -#define SYS_LSI_DEVID_SPECIFIC GENMASK(27, 0)
> > -#define SYS_LSI_PRR 0x308
> > -#define SYS_LSI_PRR_CA55_DIS BIT(8)
> > -#define SYS_LSI_PRR_NPU_DIS BIT(1)
> > -
> > +/* RZ/G3E-specific feature bits */
> > +#define SYS_LSI_PRR_CA55_DIS BIT(8)
> > +#define SYS_LSI_PRR_NPU_DIS BIT(1)
> >
> > static void rzg3e_sys_print_id(struct device *dev,
> > void __iomem *sysc_base, diff --git
> > a/drivers/soc/renesas/r9a09g057-sys.c
> > b/drivers/soc/renesas/r9a09g057-sys.c
> > new file mode 100644
> > index 000000000000..dc7885b340c4
> > --- /dev/null
> > +++ b/drivers/soc/renesas/r9a09g057-sys.c
> > @@ -0,0 +1,26 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * RZ/V2H System controller (SYS) driver
> > + *
> > + * Copyright (C) 2025 Renesas Electronics Corp.
> > + */
> > +
> > +#include <linux/bits.h>
> > +#include <linux/device.h>
> > +#include <linux/init.h>
> > +#include <linux/io.h>
> > +
> > +#include "rz-sysc.h"
> > +#include "rzg3e-sys.h"
>
> Using definitions for RZ/G3E for RZ/V2H feels wrong to me, as they are
> really SoC-specific.
> So I think you better keep them in drivers/soc/renesas/r9a09g047-sys.c
> and drivers/soc/renesas/r9a09g057-sys.c, even if that means duplication.
> RZ/G3S also has them in drivers/soc/renesas/r9a08g045-sys.c
>
I'll then put back these definitions in respective files.
> > +
> > +static const struct rz_sysc_soc_id_init_data rzv2h_sys_soc_id_init_data
> __initconst = {
> > + .family = "RZ/V2H",
> > + .id = 0x847a447,
> > + .offset = SYS_LSI_DEVID,
> > + .revision_mask = SYS_LSI_DEVID_REV,
> > + .specific_id_mask = SYS_LSI_DEVID_SPECIFIC,
>
> I wouldn't mind just putting the hex constants here, and getting rid of
> the SYS_LSI_DEVID* definitions, as the definitions are only used for
> populating these structures.
>
Noted, I'll go for it.
> > +};
> > +
> > +const struct rz_sysc_init_data rzv2h_sys_init_data = {
> > + .soc_id_init_data = &rzv2h_sys_soc_id_init_data, };
>
> > --- /dev/null
> > +++ b/drivers/soc/renesas/rzg3e-sys.h
> > @@ -0,0 +1,28 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Renesas RZ/G3E (SYS) System Controller
> > + *
> > + * Copyright (C) 2025 Renesas Electronics Corp.
> > + */
> > +
> > +#ifndef __RZG3E_SYS_H__
> > +#define __RZG3E_SYS_H__
> > +
> > +/* SYS Common Register Offsets */
> > +
> > +#define SYS_LSI_MODE 0x300
> > +/*
> > + * BOOTPLLCA[1:0]
> > + * [0,0] => 1.1GHZ
> > + * [0,1] => 1.5GHZ
> > + * [1,0] => 1.6GHZ
> > + * [1,1] => 1.7GHZ
> > + */
> > +#define SYS_LSI_MODE_STAT_BOOTPLLCA55 GENMASK(12, 11)
> > +#define SYS_LSI_MODE_CA55_1_7GHZ 0x3
> > +#define SYS_LSI_DEVID 0x304
> > +#define SYS_LSI_DEVID_REV GENMASK(31, 28)
> > +#define SYS_LSI_DEVID_SPECIFIC GENMASK(27, 0)
> > +#define SYS_LSI_PRR 0x308
> > +
> > +#endif /* __RZG3E_SYSC_H__ */
>
> Gr{oetje,eeting}s,
>
> Geert
>
> --
Regards,
John
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