linux-kernel - Re: [PATCH] ARM: vf610: report soc info via soc device

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Date:   Fri, 27 Mar 2020 10:04:37 -0700
From:   Chris Healy <cphealy@...il.com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Lucas Stach <l.stach@...gutronix.de>,
        linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>, linux-imx@....com
Subject: Re: [PATCH] ARM: vf610: report soc info via soc device

On a VF610 Vybrid:

Tested-by: Chris Healy <cphealy@...il.com>

On Thu, Mar 26, 2020 at 10:42 AM Andrey Smirnov
<andrew.smirnov@...il.com> wrote:
>
> The patch adds plumbing to soc device info code necessary to support
> Vybrid devices. Use case in mind for this is CAAM driver, which
> utilizes said API.
>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: Chris Healy <cphealy@...il.com>
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-imx@....com
> ---
>  arch/arm/mach-imx/cpu.c        | 16 ++++++++++
>  arch/arm/mach-imx/mach-vf610.c | 53 ++++++++++++++++++++++++++++++++++
>  arch/arm/mach-imx/mxc.h        |  6 ++++
>  3 files changed, 75 insertions(+)
>
> diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
> index 06f8d64b65af..e3d12b21d6f6 100644
> --- a/arch/arm/mach-imx/cpu.c
> +++ b/arch/arm/mach-imx/cpu.c
> @@ -172,6 +172,22 @@ struct device * __init imx_soc_device_init(void)
>                 ocotp_compat = "fsl,imx7ulp-ocotp";
>                 soc_id = "i.MX7ULP";
>                 break;
> +       case MXC_CPU_VF500:
> +               ocotp_compat = "fsl,vf610-ocotp";
> +               soc_id = "VF500";
> +               break;
> +       case MXC_CPU_VF510:
> +               ocotp_compat = "fsl,vf610-ocotp";
> +               soc_id = "VF510";
> +               break;
> +       case MXC_CPU_VF600:
> +               ocotp_compat = "fsl,vf610-ocotp";
> +               soc_id = "VF600";
> +               break;
> +       case MXC_CPU_VF610:
> +               ocotp_compat = "fsl,vf610-ocotp";
> +               soc_id = "VF610";
> +               break;
>         default:
>                 soc_id = "Unknown";
>         }
> diff --git a/arch/arm/mach-imx/mach-vf610.c b/arch/arm/mach-imx/mach-vf610.c
> index 9c929b09310c..565dc08412a2 100644
> --- a/arch/arm/mach-imx/mach-vf610.c
> +++ b/arch/arm/mach-imx/mach-vf610.c
> @@ -3,11 +3,63 @@
>   * Copyright 2012-2013 Freescale Semiconductor, Inc.
>   */
>
> +#include <linux/of_address.h>
>  #include <linux/of_platform.h>
> +#include <linux/io.h>
> +
>  #include <linux/irqchip.h>
>  #include <asm/mach/arch.h>
>  #include <asm/hardware/cache-l2x0.h>
>
> +#include "common.h"
> +#include "hardware.h"
> +
> +#define MSCM_CPxCOUNT          0x00c
> +#define MSCM_CPxCFG1           0x014
> +
> +static void __init vf610_detect_cpu(void)
> +{
> +       struct device_node *np;
> +       u32 cpxcount, cpxcfg1;
> +       unsigned int cpu_type;
> +       void __iomem *mscm;
> +
> +       np = of_find_compatible_node(NULL, NULL, "fsl,vf610-mscm-cpucfg");
> +       if (WARN_ON(!np))
> +               return;
> +
> +       mscm = of_iomap(np, 0);
> +       of_node_put(np);
> +
> +       if (WARN_ON(!mscm))
> +               return;
> +
> +       cpxcount = readl_relaxed(mscm + MSCM_CPxCOUNT);
> +       cpxcfg1  = readl_relaxed(mscm + MSCM_CPxCFG1);
> +
> +       iounmap(mscm);
> +
> +       cpu_type = cpxcount ? MXC_CPU_VF600 : MXC_CPU_VF500;
> +
> +       if (cpxcfg1)
> +               cpu_type |= MXC_CPU_VFx10;
> +
> +       mxc_set_cpu_type(cpu_type);
> +}
> +
> +static void __init vf610_init_machine(void)
> +{
> +       struct device *parent;
> +
> +       vf610_detect_cpu();
> +
> +       parent = imx_soc_device_init();
> +       if (parent == NULL)
> +               pr_warn("failed to initialize soc device\n");
> +
> +       of_platform_default_populate(NULL, NULL, parent);
> +}
> +
>  static const char * const vf610_dt_compat[] __initconst = {
>         "fsl,vf500",
>         "fsl,vf510",
> @@ -20,5 +72,6 @@ static const char * const vf610_dt_compat[] __initconst = {
>  DT_MACHINE_START(VYBRID_VF610, "Freescale Vybrid VF5xx/VF6xx (Device Tree)")
>         .l2c_aux_val    = 0,
>         .l2c_aux_mask   = ~0,
> +       .init_machine   = vf610_init_machine,
>         .dt_compat      = vf610_dt_compat,
>  MACHINE_END
> diff --git a/arch/arm/mach-imx/mxc.h b/arch/arm/mach-imx/mxc.h
> index 2bfd2d59b4a6..48e6d781f15b 100644
> --- a/arch/arm/mach-imx/mxc.h
> +++ b/arch/arm/mach-imx/mxc.h
> @@ -33,6 +33,12 @@
>  #define MXC_CPU_IMX7D          0x72
>  #define MXC_CPU_IMX7ULP                0xff
>
> +#define MXC_CPU_VFx10          0x010
> +#define MXC_CPU_VF500          0x500
> +#define MXC_CPU_VF510          (MXC_CPU_VF500 | MXC_CPU_VFx10)
> +#define MXC_CPU_VF600          0x600
> +#define MXC_CPU_VF610          (MXC_CPU_VF600 | MXC_CPU_VFx10)
> +
>  #define IMX_DDR_TYPE_LPDDR2            1
>
>  #ifndef __ASSEMBLY__
> --
> 2.21.0