From: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
To: srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Finley Xiao <finley.xiao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Subject: [PATCH v2 2/2] nvmem: rockchip-efuse: add support for rk3328-efuse
Date: Wed, 13 Dec 2017 07:51:55 +0100 [thread overview]
Message-ID: <20171213065155.32020-3-heiko@sntech.de> (raw)
In-Reply-To: <20171213065155.32020-1-heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
From: Finley Xiao <finley.xiao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
This adds the necessary data for handling eFuse on the rk3328.
Signed-off-by: Finley Xiao <finley.xiao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
---
.../devicetree/bindings/nvmem/rockchip-efuse.txt | 1 +
drivers/nvmem/rockchip-efuse.c | 66 ++++++++++++++++++++++
2 files changed, 67 insertions(+)
diff --git a/Documentation/devicetree/bindings/nvmem/rockchip-efuse.txt b/Documentation/devicetree/bindings/nvmem/rockchip-efuse.txt
index a6ef46dd1283..265bdb7dc8aa 100644
--- a/Documentation/devicetree/bindings/nvmem/rockchip-efuse.txt
+++ b/Documentation/devicetree/bindings/nvmem/rockchip-efuse.txt
@@ -6,6 +6,7 @@ Required properties:
- "rockchip,rk3188-efuse" - for RK3188 SoCs.
- "rockchip,rk3228-efuse" - for RK3228 SoCs.
- "rockchip,rk3288-efuse" - for RK3288 SoCs.
+ - "rockchip,rk3328-efuse" - for RK3328 SoCs.
- "rockchip,rk3368-efuse" - for RK3368 SoCs.
- "rockchip,rk3399-efuse" - for RK3399 SoCs.
- reg: Should contain the registers location and exact eFuse size
diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c
index a91372816c0a..b3fa41162973 100644
--- a/drivers/nvmem/rockchip-efuse.c
+++ b/drivers/nvmem/rockchip-efuse.c
@@ -32,6 +32,14 @@
#define RK3288_STROBE BIT(1)
#define RK3288_CSB BIT(0)
+#define RK3328_SECURE_SIZES 96
+#define RK3328_INT_STATUS 0x0018
+#define RK3328_DOUT 0x0020
+#define RK3328_AUTO_CTRL 0x0024
+#define RK3328_INT_FINISH BIT(0)
+#define RK3328_AUTO_ENB BIT(0)
+#define RK3328_AUTO_RD BIT(1)
+
#define RK3399_A_SHIFT 16
#define RK3399_A_MASK 0x3ff
#define RK3399_NBYTES 4
@@ -92,6 +100,60 @@ static int rockchip_rk3288_efuse_read(void *context, unsigned int offset,
return 0;
}
+static int rockchip_rk3328_efuse_read(void *context, unsigned int offset,
+ void *val, size_t bytes)
+{
+ struct rockchip_efuse_chip *efuse = context;
+ unsigned int addr_start, addr_end, addr_offset, addr_len;
+ u32 out_value, status;
+ u8 *buf;
+ int ret, i = 0;
+
+ ret = clk_prepare_enable(efuse->clk);
+ if (ret < 0) {
+ dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");
+ return ret;
+ }
+
+ /* 128 Byte efuse, 96 Byte for secure, 32 Byte for non-secure */
+ offset += RK3328_SECURE_SIZES;
+ addr_start = rounddown(offset, RK3399_NBYTES) / RK3399_NBYTES;
+ addr_end = roundup(offset + bytes, RK3399_NBYTES) / RK3399_NBYTES;
+ addr_offset = offset % RK3399_NBYTES;
+ addr_len = addr_end - addr_start;
+
+ buf = kzalloc(sizeof(*buf) * addr_len * RK3399_NBYTES, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto nomem;
+ }
+
+ while (addr_len--) {
+ writel(RK3328_AUTO_RD | RK3328_AUTO_ENB |
+ ((addr_start++ & RK3399_A_MASK) << RK3399_A_SHIFT),
+ efuse->base + RK3328_AUTO_CTRL);
+ udelay(4);
+ status = readl(efuse->base + RK3328_INT_STATUS);
+ if (!(status & RK3328_INT_FINISH)) {
+ ret = -EIO;
+ goto err;
+ }
+ out_value = readl(efuse->base + RK3328_DOUT);
+ writel(RK3328_INT_FINISH, efuse->base + RK3328_INT_STATUS);
+
+ memcpy(&buf[i], &out_value, RK3399_NBYTES);
+ i += RK3399_NBYTES;
+ }
+
+ memcpy(val, buf + addr_offset, bytes);
+err:
+ kfree(buf);
+nomem:
+ clk_disable_unprepare(efuse->clk);
+
+ return ret;
+}
+
static int rockchip_rk3399_efuse_read(void *context, unsigned int offset,
void *val, size_t bytes)
{
@@ -180,6 +242,10 @@ static const struct of_device_id rockchip_efuse_match[] = {
.compatible = "rockchip,rk3368-efuse",
.data = (void *)&rockchip_rk3288_efuse_read,
},
+ {
+ .compatible = "rockchip,rk3328-efuse",
+ .data = (void *)&rockchip_rk3328_efuse_read,
+ },
{
.compatible = "rockchip,rk3399-efuse",
.data = (void *)&rockchip_rk3399_efuse_read,
--
2.14.2
--
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prev parent reply other threads:[~2017-12-13 6:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-13 6:51 [PATCH v2 0/2] nvmem: efuse support for rk3328 Heiko Stuebner
[not found] ` <20171213065155.32020-1-heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
2017-12-13 6:51 ` [PATCH v2 1/2] nvmem: rockchip-efuse: parse 'rockchip,efuse-size' Heiko Stuebner
2017-12-13 6:51 ` Heiko Stuebner [this message]
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