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nvmem: rockchip-otp: Add support for rk3588-otp

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This adds the necessary data for handling otp on the rk3588.

Change-Id: I55a162dfa5735139c2f1d74510b53496decacbb6
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2021-07-12 17:17:48 +08:00
parent dc6c7a9c42
commit 3eae38e0c1
1 changed files with 101 additions and 0 deletions
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101
drivers/nvmem/rockchip-otp.c
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@@ -57,6 +57,18 @@
#define OTPC_TIMEOUT_PROG 100000
#define RK3568_NBYTES 2
#define RK3588_OTPC_AUTO_CTRL 0x04
#define RK3588_OTPC_AUTO_EN 0x08
#define RK3588_OTPC_INT_ST 0x84
#define RK3588_OTPC_DOUT0 0x20
#define RK3588_NO_SECURE_OFFSET 0x300
#define RK3588_NBYTES 4
#define RK3588_BURST_NUM 1
#define RK3588_BURST_SHIFT 8
#define RK3588_ADDR_SHIFT 16
#define RK3588_AUTO_EN BIT(0)
#define RK3588_RD_DONE BIT(1)
#define RV1126_OTP_NVM_CEB 0x00
#define RV1126_OTP_NVM_RSTB 0x04
#define RV1126_OTP_NVM_ST 0x18
@@ -324,6 +336,80 @@ out:
return ret;
}
static int rk3588_otp_wait_status(struct rockchip_otp *otp, u32 flag)
{
u32 status = 0;
int ret;
ret = readl_poll_timeout_atomic(otp->base + RK3588_OTPC_INT_ST, status,
(status & flag), 1, OTPC_TIMEOUT);
if (ret)
return ret;
/* clean int status */
writel(flag, otp->base + RK3588_OTPC_INT_ST);
return 0;
}
static int rk3588_otp_read(void *context, unsigned int offset, void *val,
size_t bytes)
{
struct rockchip_otp *otp = context;
unsigned int addr_start, addr_end, addr_offset, addr_len;
int ret = 0, i = 0;
u32 out_value;
u8 *buf;
if (offset >= otp->data->size)
return -ENOMEM;
if (offset + bytes > otp->data->size)
bytes = otp->data->size - offset;
addr_start = rounddown(offset, RK3588_NBYTES) / RK3588_NBYTES;
addr_end = roundup(offset + bytes, RK3588_NBYTES) / RK3588_NBYTES;
addr_offset = offset % RK3588_NBYTES;
addr_len = addr_end - addr_start;
addr_start += RK3588_NO_SECURE_OFFSET;
buf = kzalloc(array3_size(addr_len, RK3588_NBYTES, sizeof(*buf)),
GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = clk_bulk_prepare_enable(otp->num_clks, otp->clks);
if (ret < 0) {
dev_err(otp->dev, "failed to prepare/enable clks\n");
goto out;
}
while (addr_len--) {
writel((addr_start << RK3588_ADDR_SHIFT) |
(RK3588_BURST_NUM << RK3588_BURST_SHIFT),
otp->base + RK3588_OTPC_AUTO_CTRL);
writel(RK3588_AUTO_EN, otp->base + RK3588_OTPC_AUTO_EN);
ret = rk3588_otp_wait_status(otp, RK3588_RD_DONE);
if (ret < 0) {
dev_err(otp->dev, "timeout during read setup\n");
goto read_end;
}
out_value = readl(otp->base + RK3588_OTPC_DOUT0);
memcpy(&buf[i], &out_value, RK3588_NBYTES);
i += RK3588_NBYTES;
addr_start++;
}
memcpy(val, buf + addr_offset, bytes);
read_end:
clk_bulk_disable_unprepare(otp->num_clks, otp->clks);
out:
kfree(buf);
return ret;
}
static int rv1126_otp_init(struct rockchip_otp *otp)
{
u32 status = 0;
@@ -515,6 +601,17 @@ static const struct rockchip_data rk3568_data = {
.reg_read = rk3568_otp_read,
};
static const char * const rk3588_otp_clocks[] = {
"otpc", "apb", "arb", "phy",
};
static const struct rockchip_data rk3588_data = {
.size = 0x400,
.clocks = rk3588_otp_clocks,
.num_clks = ARRAY_SIZE(rk3588_otp_clocks),
.reg_read = rk3588_otp_read,
};
static const char * const rv1126_otp_clocks[] = {
"otp", "apb_pclk",
};
@@ -541,6 +638,10 @@ static const struct of_device_id rockchip_otp_match[] = {
.compatible = "rockchip,rk3568-otp",
.data = (void *)&rk3568_data,
},
{
.compatible = "rockchip,rk3588-otp",
.data = (void *)&rk3588_data,
},
{
.compatible = "rockchip,rv1126-otp",
.data = (void *)&rv1126_data,