From: Shawn Guo <shawnguo@kernel.org>
To: Ivan Zaentsev <ivan.zaentsev@wirenboard.ru>
Cc: Sascha Hauer <s.hauer@pengutronix.de>,
Evgeny Boger <boger@wirenboard.com>,
Russell King <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] ARM: mxs: Add serial number support for i.MX23, i.MX28 SoCs
Date: Mon, 16 Nov 2020 16:10:26 +0800 [thread overview]
Message-ID: <20201116081025.GF5849@dragon> (raw)
In-Reply-To: <20201111051859.2776-1-ivan.zaentsev@wirenboard.ru>
On Wed, Nov 11, 2020 at 08:18:59AM +0300, Ivan Zaentsev wrote:
> i.MX23 and i.MX28 SoCs unique identifiers are factory-programmed
> in On-Chip OTP memory. i.MX28's 64-bit unique id is in
> HW_OCOTP_OPS2:HW_OCOTP_OPS3 (see MCIMX28 Ref. Man., sec. 20.4.22-23).
>
> i.MX23 provides 32-bit long unique id in HW_OCOTP_OPS3.
> Though not clearly documented, there is a clue in sec. 35.9.3.
>
> The unique id is reported in /sys/devices/soc0/serial_number
> and in /proc/cpuinfo
>
> Signed-off-by: Ivan Zaentsev <ivan.zaentsev@wirenboard.ru>
> Suggested-by: Evgeny Boger <boger@wirenboard.com>
> ---
> arch/arm/mach-mxs/mach-mxs.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
> index c109f47e9cbc..af96368cc16a 100644
> --- a/arch/arm/mach-mxs/mach-mxs.c
> +++ b/arch/arm/mach-mxs/mach-mxs.c
> @@ -23,6 +23,7 @@
> #include <asm/mach/map.h>
> #include <asm/mach/time.h>
> #include <asm/system_misc.h>
> +#include <asm/system_info.h>
Can we move it above <asm/system_misc.h> to get them alphabetically
sorted?
>
> #include "pm.h"
>
> @@ -51,6 +52,9 @@
> #define MXS_CLR_ADDR 0x8
> #define MXS_TOG_ADDR 0xc
>
> +#define HW_OCOTP_OPS2 19 /* offset 0x150 */
> +#define HW_OCOTP_OPS3 20 /* offset 0x160 */
Use tabs instead of spaces for indent.
> +
> static u32 chipid;
> static u32 socid;
>
> @@ -379,6 +383,8 @@ static void __init mxs_machine_init(void)
> struct device *parent;
> struct soc_device *soc_dev;
> struct soc_device_attribute *soc_dev_attr;
> + u64 soc_uid = 0;
> + const u32 *ocotp = mxs_get_ocotp();
> int ret;
>
> soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
> @@ -394,8 +400,22 @@ static void __init mxs_machine_init(void)
> soc_dev_attr->soc_id = mxs_get_soc_id();
> soc_dev_attr->revision = mxs_get_revision();
>
> + if (socid == HW_DIGCTL_CHIPID_MX23) {
> + soc_uid = system_serial_low = ocotp[HW_OCOTP_OPS3];
> + } else if (socid == HW_DIGCTL_CHIPID_MX28) {
> + soc_uid = system_serial_high = ocotp[HW_OCOTP_OPS2];
> + soc_uid <<= 32;
> + system_serial_low = ocotp[HW_OCOTP_OPS3];
> + soc_uid |= system_serial_low;
> + }
> +
> + if (soc_uid)
> + soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
> +
> soc_dev = soc_device_register(soc_dev_attr);
> +
Unnecessary newline.
Shawn
> if (IS_ERR(soc_dev)) {
> + kfree(soc_dev_attr->serial_number);
> kfree(soc_dev_attr->revision);
> kfree(soc_dev_attr);
> return;
> --
> 2.25.1
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Shawn Guo <shawnguo@kernel.org>
To: Ivan Zaentsev <ivan.zaentsev@wirenboard.ru>
Cc: Russell King <linux@armlinux.org.uk>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Evgeny Boger <boger@wirenboard.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: mxs: Add serial number support for i.MX23, i.MX28 SoCs
Date: Mon, 16 Nov 2020 16:10:26 +0800 [thread overview]
Message-ID: <20201116081025.GF5849@dragon> (raw)
In-Reply-To: <20201111051859.2776-1-ivan.zaentsev@wirenboard.ru>
On Wed, Nov 11, 2020 at 08:18:59AM +0300, Ivan Zaentsev wrote:
> i.MX23 and i.MX28 SoCs unique identifiers are factory-programmed
> in On-Chip OTP memory. i.MX28's 64-bit unique id is in
> HW_OCOTP_OPS2:HW_OCOTP_OPS3 (see MCIMX28 Ref. Man., sec. 20.4.22-23).
>
> i.MX23 provides 32-bit long unique id in HW_OCOTP_OPS3.
> Though not clearly documented, there is a clue in sec. 35.9.3.
>
> The unique id is reported in /sys/devices/soc0/serial_number
> and in /proc/cpuinfo
>
> Signed-off-by: Ivan Zaentsev <ivan.zaentsev@wirenboard.ru>
> Suggested-by: Evgeny Boger <boger@wirenboard.com>
> ---
> arch/arm/mach-mxs/mach-mxs.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
> index c109f47e9cbc..af96368cc16a 100644
> --- a/arch/arm/mach-mxs/mach-mxs.c
> +++ b/arch/arm/mach-mxs/mach-mxs.c
> @@ -23,6 +23,7 @@
> #include <asm/mach/map.h>
> #include <asm/mach/time.h>
> #include <asm/system_misc.h>
> +#include <asm/system_info.h>
Can we move it above <asm/system_misc.h> to get them alphabetically
sorted?
>
> #include "pm.h"
>
> @@ -51,6 +52,9 @@
> #define MXS_CLR_ADDR 0x8
> #define MXS_TOG_ADDR 0xc
>
> +#define HW_OCOTP_OPS2 19 /* offset 0x150 */
> +#define HW_OCOTP_OPS3 20 /* offset 0x160 */
Use tabs instead of spaces for indent.
> +
> static u32 chipid;
> static u32 socid;
>
> @@ -379,6 +383,8 @@ static void __init mxs_machine_init(void)
> struct device *parent;
> struct soc_device *soc_dev;
> struct soc_device_attribute *soc_dev_attr;
> + u64 soc_uid = 0;
> + const u32 *ocotp = mxs_get_ocotp();
> int ret;
>
> soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
> @@ -394,8 +400,22 @@ static void __init mxs_machine_init(void)
> soc_dev_attr->soc_id = mxs_get_soc_id();
> soc_dev_attr->revision = mxs_get_revision();
>
> + if (socid == HW_DIGCTL_CHIPID_MX23) {
> + soc_uid = system_serial_low = ocotp[HW_OCOTP_OPS3];
> + } else if (socid == HW_DIGCTL_CHIPID_MX28) {
> + soc_uid = system_serial_high = ocotp[HW_OCOTP_OPS2];
> + soc_uid <<= 32;
> + system_serial_low = ocotp[HW_OCOTP_OPS3];
> + soc_uid |= system_serial_low;
> + }
> +
> + if (soc_uid)
> + soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
> +
> soc_dev = soc_device_register(soc_dev_attr);
> +
Unnecessary newline.
Shawn
> if (IS_ERR(soc_dev)) {
> + kfree(soc_dev_attr->serial_number);
> kfree(soc_dev_attr->revision);
> kfree(soc_dev_attr);
> return;
> --
> 2.25.1
>
next prev parent reply other threads:[~2020-11-16 8:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-11 5:18 [PATCH] ARM: mxs: Add serial number support for i.MX23, i.MX28 SoCs Ivan Zaentsev
2020-11-11 5:18 ` Ivan Zaentsev
2020-11-11 19:46 ` Fabio Estevam
2020-11-11 19:46 ` Fabio Estevam
2020-11-16 8:10 ` Shawn Guo [this message]
2020-11-16 8:10 ` Shawn Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201116081025.GF5849@dragon \
--to=shawnguo@kernel.org \
--cc=boger@wirenboard.com \
--cc=festevam@gmail.com \
--cc=ivan.zaentsev@wirenboard.ru \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=s.hauer@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.