diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/801-v5.11-0003-nvmem-imx-ocotp-add-support-for-the-unaliged-word-co.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/801-v5.11-0003-nvmem-imx-ocotp-add-support-for-the-unaliged-word-co.patch | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/target/linux/generic/backport-5.10/801-v5.11-0003-nvmem-imx-ocotp-add-support-for-the-unaliged-word-co.patch b/target/linux/generic/backport-5.10/801-v5.11-0003-nvmem-imx-ocotp-add-support-for-the-unaliged-word-co.patch deleted file mode 100644 index 0a05e0a97f..0000000000 --- a/target/linux/generic/backport-5.10/801-v5.11-0003-nvmem-imx-ocotp-add-support-for-the-unaliged-word-co.patch +++ /dev/null @@ -1,105 +0,0 @@ -From 3311bf18467272388039922a5e29c4925b291f73 Mon Sep 17 00:00:00 2001 -From: Peng Fan <peng.fan@nxp.com> -Date: Fri, 27 Nov 2020 10:28:37 +0000 -Subject: [PATCH] nvmem: imx-ocotp: add support for the unaliged word count - -When offset is not 4 bytes aligned, directly shift righty by 2 bits -will cause reading out wrong data. Since imx ocotp only supports -4 bytes reading once, we need handle offset is not 4 bytes aligned -and enlarge the bytes to 4 bytes aligned. After reading finished, -copy the needed data from buffer to caller and free buffer. - -Signed-off-by: Peng Fan <peng.fan@nxp.com> -Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> -Link: https://lore.kernel.org/r/20201127102837.19366-6-srinivas.kandagatla@linaro.org -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/nvmem/imx-ocotp.c | 30 ++++++++++++++++++++++++------ - 1 file changed, 24 insertions(+), 6 deletions(-) - ---- a/drivers/nvmem/imx-ocotp.c -+++ b/drivers/nvmem/imx-ocotp.c -@@ -4,6 +4,8 @@ - * - * Copyright (c) 2015 Pengutronix, Philipp Zabel <p.zabel@pengutronix.de> - * -+ * Copyright 2019 NXP -+ * - * Based on the barebox ocotp driver, - * Copyright (c) 2010 Baruch Siach <baruch@tkos.co.il>, - * Orex Computed Radiography -@@ -158,22 +160,30 @@ static int imx_ocotp_read(void *context, - { - struct ocotp_priv *priv = context; - unsigned int count; -- u32 *buf = val; -+ u8 *buf, *p; - int i, ret; -- u32 index; -+ u32 index, num_bytes; - - index = offset >> 2; -- count = bytes >> 2; -+ num_bytes = round_up((offset % 4) + bytes, 4); -+ count = num_bytes >> 2; - - if (count > (priv->params->nregs - index)) - count = priv->params->nregs - index; - -+ p = kzalloc(num_bytes, GFP_KERNEL); -+ if (!p) -+ return -ENOMEM; -+ - mutex_lock(&ocotp_mutex); - -+ buf = p; -+ - ret = clk_prepare_enable(priv->clk); - if (ret < 0) { - mutex_unlock(&ocotp_mutex); - dev_err(priv->dev, "failed to prepare/enable ocotp clk\n"); -+ kfree(p); - return ret; - } - -@@ -184,7 +194,7 @@ static int imx_ocotp_read(void *context, - } - - for (i = index; i < (index + count); i++) { -- *buf++ = readl(priv->base + IMX_OCOTP_OFFSET_B0W0 + -+ *(u32 *)buf = readl(priv->base + IMX_OCOTP_OFFSET_B0W0 + - i * IMX_OCOTP_OFFSET_PER_WORD); - - /* 47.3.1.2 -@@ -193,13 +203,21 @@ static int imx_ocotp_read(void *context, - * software before any new write, read or reload access can be - * issued - */ -- if (*(buf - 1) == IMX_OCOTP_READ_LOCKED_VAL) -+ if (*((u32 *)buf) == IMX_OCOTP_READ_LOCKED_VAL) - imx_ocotp_clr_err_if_set(priv); -+ -+ buf += 4; - } - -+ index = offset % 4; -+ memcpy(val, &p[index], bytes); -+ - read_end: - clk_disable_unprepare(priv->clk); - mutex_unlock(&ocotp_mutex); -+ -+ kfree(p); -+ - return ret; - } - -@@ -447,7 +465,7 @@ static struct nvmem_config imx_ocotp_nvm - .name = "imx-ocotp", - .read_only = false, - .word_size = 4, -- .stride = 4, -+ .stride = 1, - .reg_read = imx_ocotp_read, - .reg_write = imx_ocotp_write, - }; |