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[92.233.226.227]) by smtp.gmail.com with ESMTPSA id z18sm14589340wro.25.2021.10.06.07.47.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 07:47:42 -0700 (PDT) From: Srinivas Kandagatla To: srini@kernel.org Cc: linux-kernel@vger.kernel.org, qiangqing.zhang@nxp.com, linux-imx@nxp.com, Srinivas Kandagatla Subject: [PATCH 3/3] nvmem: imx-ocotp: add support for post processing Date: Wed, 6 Oct 2021 15:47:29 +0100 Message-Id: <20211006144729.15268-4-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20211006144729.15268-1-srinivas.kandagatla@linaro.org> References: <20211006144729.15268-1-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add .cell_post_process callback for imx-ocotp to deal with MAC address, since MAC address need to be reversed byte for some i.MX SoCs. Signed-off-by: Srinivas Kandagatla Signed-off-by: Joakim Zhang --- drivers/nvmem/imx-ocotp.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index 08f41328cc71..89fd4d3eb649 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -97,6 +97,7 @@ struct ocotp_params { unsigned int bank_address_words; void (*set_timing)(struct ocotp_priv *priv); struct ocotp_ctrl_reg ctrl; + bool reverse_mac_address; }; static int imx_ocotp_wait_for_busy(struct ocotp_priv *priv, u32 flags) @@ -221,6 +222,25 @@ static int imx_ocotp_read(void *context, unsigned int offset, return ret; } +static int imx_ocotp_cell_pp(void *context, const char *id, unsigned int offset, + void *data, size_t bytes) +{ + struct ocotp_priv *priv = context; + + /* Deal with some post processing of nvmem cell data */ + if (!strcmp(id, "mac-address")) { + if (priv->params->reverse_mac_address) { + u8 *buf = data; + int i; + + for (i = 0; i < bytes/2; i++) + swap(buf[i], buf[bytes - i - 1]); + } + } + + return 0; +} + static void imx_ocotp_set_imx6_timing(struct ocotp_priv *priv) { unsigned long clk_rate; @@ -468,6 +488,7 @@ static struct nvmem_config imx_ocotp_nvmem_config = { .stride = 1, .reg_read = imx_ocotp_read, .reg_write = imx_ocotp_write, + .cell_post_process = imx_ocotp_cell_pp, }; static const struct ocotp_params imx6q_params = { @@ -530,6 +551,7 @@ static const struct ocotp_params imx8mq_params = { .bank_address_words = 0, .set_timing = imx_ocotp_set_imx6_timing, .ctrl = IMX_OCOTP_BM_CTRL_DEFAULT, + .reverse_mac_address = true, }; static const struct ocotp_params imx8mm_params = { @@ -537,6 +559,7 @@ static const struct ocotp_params imx8mm_params = { .bank_address_words = 0, .set_timing = imx_ocotp_set_imx6_timing, .ctrl = IMX_OCOTP_BM_CTRL_DEFAULT, + .reverse_mac_address = true, }; static const struct ocotp_params imx8mn_params = { @@ -544,6 +567,7 @@ static const struct ocotp_params imx8mn_params = { .bank_address_words = 0, .set_timing = imx_ocotp_set_imx6_timing, .ctrl = IMX_OCOTP_BM_CTRL_DEFAULT, + .reverse_mac_address = true, }; static const struct ocotp_params imx8mp_params = { @@ -551,6 +575,7 @@ static const struct ocotp_params imx8mp_params = { .bank_address_words = 0, .set_timing = imx_ocotp_set_imx6_timing, .ctrl = IMX_OCOTP_BM_CTRL_8MP, + .reverse_mac_address = true, }; static const struct of_device_id imx_ocotp_dt_ids[] = { -- 2.21.0