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rockchip: otp: Add support for RV1126

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Extend the otp driver to read rv1126 otp. This driver code was
adapted from the Rockchip BSP stack.

Signed-off-by: Tim Lunn <tim@feathertop.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Tim Lunn 2023-10-31 13:07:14 +11:00 committed by Tom Rini
parent dae79b870a
commit 455ad75cb2
1 changed files with 76 additions and 0 deletions
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76
drivers/misc/rockchip-otp.c
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@ -61,11 +61,20 @@
#define RK3588_OTPC_INT_ST 0x0084
#define RK3588_RD_DONE BIT(1)
#define RV1126_OTP_NVM_CEB 0x00
#define RV1126_OTP_NVM_RSTB 0x04
#define RV1126_OTP_NVM_ST 0x18
#define RV1126_OTP_NVM_RADDR 0x1C
#define RV1126_OTP_NVM_RSTART 0x20
#define RV1126_OTP_NVM_RDATA 0x24
#define RV1126_OTP_READ_ST 0x30
struct rockchip_otp_plat {
void __iomem *base;
};
struct rockchip_otp_data {
int (*init)(struct udevice *dev);
int (*read)(struct udevice *dev, int offset, void *buf, int size);
int offset;
int size;
@ -232,6 +241,48 @@ static int rockchip_rk3588_otp_read(struct udevice *dev, int offset,
return 0;
}
static int rockchip_rv1126_otp_init(struct udevice *dev)
{
struct rockchip_otp_plat *otp = dev_get_plat(dev);
int ret;
writel(0x0, otp->base + RV1126_OTP_NVM_CEB);
ret = rockchip_otp_poll_timeout(otp, 0x1, RV1126_OTP_NVM_ST);
if (ret)
return ret;
writel(0x1, otp->base + RV1126_OTP_NVM_RSTB);
ret = rockchip_otp_poll_timeout(otp, 0x4, RV1126_OTP_NVM_ST);
if (ret)
return ret;
return 0;
}
static int rockchip_rv1126_otp_read(struct udevice *dev, int offset, void *buf,
int size)
{
struct rockchip_otp_plat *otp = dev_get_plat(dev);
u32 status = 0;
u8 *buffer = buf;
int ret = 0;
while (size--) {
writel(offset++, otp->base + RV1126_OTP_NVM_RADDR);
writel(0x1, otp->base + RV1126_OTP_NVM_RSTART);
ret = readl_poll_timeout(otp->base + RV1126_OTP_READ_ST,
status, !status, OTPC_TIMEOUT);
if (ret)
return ret;
*buffer++ = (u8)(readl(otp->base + RV1126_OTP_NVM_RDATA) & 0xFF);
}
return 0;
}
static int rockchip_otp_read(struct udevice *dev, int offset,
void *buf, int size)
{
@ -286,6 +337,20 @@ static int rockchip_otp_of_to_plat(struct udevice *dev)
return 0;
}
static int rockchip_otp_probe(struct udevice *dev)
{
struct rockchip_otp_data *data;
data = (struct rockchip_otp_data *)dev_get_driver_data(dev);
if (!data)
return -EINVAL;
if (data->init)
return data->init(dev);
return 0;
}
static const struct rockchip_otp_data px30_data = {
.read = rockchip_px30_otp_read,
.size = 0x40,
@ -304,6 +369,12 @@ static const struct rockchip_otp_data rk3588_data = {
.block_size = 4,
};
static const struct rockchip_otp_data rv1126_data = {
.init = rockchip_rv1126_otp_init,
.read = rockchip_rv1126_otp_read,
.size = 0x40,
};
static const struct udevice_id rockchip_otp_ids[] = {
{
.compatible = "rockchip,px30-otp",
@ -321,6 +392,10 @@ static const struct udevice_id rockchip_otp_ids[] = {
.compatible = "rockchip,rk3588-otp",
.data = (ulong)&rk3588_data,
},
{
.compatible = "rockchip,rv1126-otp",
.data = (ulong)&rv1126_data,
},
{}
};
@ -331,4 +406,5 @@ U_BOOT_DRIVER(rockchip_otp) = {
.of_to_plat = rockchip_otp_of_to_plat,
.plat_auto = sizeof(struct rockchip_otp_plat),
.ops = &rockchip_otp_ops,
.probe = rockchip_otp_probe,
};