From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iCksm-0002LQ-SH for barebox@lists.infradead.org; Tue, 24 Sep 2019 13:29:35 +0000 From: Bastian Krause Date: Tue, 24 Sep 2019 15:29:17 +0200 Message-Id: <20190924132918.28710-4-bst@pengutronix.de> In-Reply-To: <20190924132918.28710-1-bst@pengutronix.de> References: <20190924132918.28710-1-bst@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v3 3/4] nvmem: ocotp: set unique id as machine-id hashable To: barebox@lists.infradead.org Cc: Bastian Krause Pass the OCOTP unique id as hashable information to machine id generation. Signed-off-by: Bastian Krause --- drivers/nvmem/ocotp.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/nvmem/ocotp.c b/drivers/nvmem/ocotp.c index 3f9f162860..d5e9d72a52 100644 --- a/drivers/nvmem/ocotp.c +++ b/drivers/nvmem/ocotp.c @@ -29,6 +29,7 @@ #include #include #include +#include #include /* @@ -77,6 +78,9 @@ #define MAC_OFFSET_1 (0x24 * 4) #define MAX_MAC_OFFSETS 2 #define MAC_BYTES 8 +#define UNIQUE_ID_NUM 2 +/* 0 <= n < UNIQUE_ID_NUM */ +#define UNIQUE_ID(n) (OCOTP_WORD(0x410 + 0x10 * (n)) | OCOTP_BIT(0) | OCOTP_WIDTH(32)) enum imx_ocotp_format_mac_direction { OCOTP_HW_TO_MAC, @@ -548,6 +552,23 @@ static int imx_ocotp_read(struct device_d *dev, const int offset, void *val, return regmap_bulk_read(priv->map, offset, val, bytes); } +static int imx_ocotp_set_unique_machine_id(void) +{ + uint32_t unique_id_parts[UNIQUE_ID_NUM]; + int ret, i; + + for (i = 0; i < UNIQUE_ID_NUM; i++) { + ret = imx_ocotp_read_field(UNIQUE_ID(i), &unique_id_parts[i]); + if (ret < 0) + goto out; + } + + machine_id_set_hashable(unique_id_parts, sizeof(unique_id_parts)); + +out: + return ret; +} + static const struct nvmem_bus imx_ocotp_nvmem_bus = { .write = imx_ocotp_write, .read = imx_ocotp_read, @@ -633,6 +654,9 @@ static int imx_ocotp_probe(struct device_d *dev) ethaddr->value, ethaddr); } + if (IS_ENABLED(CONFIG_MACHINE_ID)) + imx_ocotp_set_unique_machine_id(); + imx_ocotp_init_dt(priv); dev_add_param_bool(&(priv->dev), "sense_enable", NULL, NULL, &priv->sense_enable, priv); -- 2.23.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox