mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-20 13:51:54 +00:00
110 lines
3.5 KiB
Diff
110 lines
3.5 KiB
Diff
From 943eadbdb11314b41eacbcc484dfb7f93e271ff4 Mon Sep 17 00:00:00 2001
|
|
From: Sean Anderson <sean.anderson@seco.com>
|
|
Date: Fri, 29 Apr 2022 17:27:00 +0100
|
|
Subject: [PATCH] nvmem: sfp: Use regmap
|
|
|
|
This converts the SFP driver to use regmap. This will allow easily
|
|
supporting devices with different endians. We disallow byte-level
|
|
access, as regmap_bulk_read doesn't support it (and it's unclear what
|
|
the correct result would be when we have an endianness difference).
|
|
|
|
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
|
|
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
|
|
Link: https://lore.kernel.org/r/20220429162701.2222-16-srinivas.kandagatla@linaro.org
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/nvmem/Kconfig | 1 +
|
|
drivers/nvmem/layerscape-sfp.c | 30 ++++++++++++++++++++++--------
|
|
2 files changed, 23 insertions(+), 8 deletions(-)
|
|
|
|
--- a/drivers/nvmem/Kconfig
|
|
+++ b/drivers/nvmem/Kconfig
|
|
@@ -304,6 +304,7 @@ config NVMEM_LAYERSCAPE_SFP
|
|
tristate "Layerscape SFP (Security Fuse Processor) support"
|
|
depends on ARCH_LAYERSCAPE || COMPILE_TEST
|
|
depends on HAS_IOMEM
|
|
+ select REGMAP_MMIO
|
|
help
|
|
This driver provides support to read the eFuses on Freescale
|
|
Layerscape SoC's. For example, the vendor provides a per part
|
|
--- a/drivers/nvmem/layerscape-sfp.c
|
|
+++ b/drivers/nvmem/layerscape-sfp.c
|
|
@@ -13,15 +13,17 @@
|
|
#include <linux/nvmem-provider.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/property.h>
|
|
+#include <linux/regmap.h>
|
|
|
|
#define LAYERSCAPE_SFP_OTP_OFFSET 0x0200
|
|
|
|
struct layerscape_sfp_priv {
|
|
- void __iomem *base;
|
|
+ struct regmap *regmap;
|
|
};
|
|
|
|
struct layerscape_sfp_data {
|
|
int size;
|
|
+ enum regmap_endian endian;
|
|
};
|
|
|
|
static int layerscape_sfp_read(void *context, unsigned int offset, void *val,
|
|
@@ -29,15 +31,16 @@ static int layerscape_sfp_read(void *con
|
|
{
|
|
struct layerscape_sfp_priv *priv = context;
|
|
|
|
- memcpy_fromio(val, priv->base + LAYERSCAPE_SFP_OTP_OFFSET + offset,
|
|
- bytes);
|
|
-
|
|
- return 0;
|
|
+ return regmap_bulk_read(priv->regmap,
|
|
+ LAYERSCAPE_SFP_OTP_OFFSET + offset, val,
|
|
+ bytes / 4);
|
|
}
|
|
|
|
static struct nvmem_config layerscape_sfp_nvmem_config = {
|
|
.name = "fsl-sfp",
|
|
.reg_read = layerscape_sfp_read,
|
|
+ .word_size = 4,
|
|
+ .stride = 4,
|
|
};
|
|
|
|
static int layerscape_sfp_probe(struct platform_device *pdev)
|
|
@@ -45,16 +48,26 @@ static int layerscape_sfp_probe(struct p
|
|
const struct layerscape_sfp_data *data;
|
|
struct layerscape_sfp_priv *priv;
|
|
struct nvmem_device *nvmem;
|
|
+ struct regmap_config config = { 0 };
|
|
+ void __iomem *base;
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
- priv->base = devm_platform_ioremap_resource(pdev, 0);
|
|
- if (IS_ERR(priv->base))
|
|
- return PTR_ERR(priv->base);
|
|
+ base = devm_platform_ioremap_resource(pdev, 0);
|
|
+ if (IS_ERR(base))
|
|
+ return PTR_ERR(base);
|
|
|
|
data = device_get_match_data(&pdev->dev);
|
|
+ config.reg_bits = 32;
|
|
+ config.reg_stride = 4;
|
|
+ config.val_bits = 32;
|
|
+ config.val_format_endian = data->endian;
|
|
+ config.max_register = LAYERSCAPE_SFP_OTP_OFFSET + data->size - 4;
|
|
+ priv->regmap = devm_regmap_init_mmio(&pdev->dev, base, &config);
|
|
+ if (IS_ERR(priv->regmap))
|
|
+ return PTR_ERR(priv->regmap);
|
|
|
|
layerscape_sfp_nvmem_config.size = data->size;
|
|
layerscape_sfp_nvmem_config.dev = &pdev->dev;
|
|
@@ -67,6 +80,7 @@ static int layerscape_sfp_probe(struct p
|
|
|
|
static const struct layerscape_sfp_data ls1028a_data = {
|
|
.size = 0x88,
|
|
+ .endian = REGMAP_ENDIAN_LITTLE,
|
|
};
|
|
|
|
static const struct of_device_id layerscape_sfp_dt_ids[] = {
|