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nvmem: imx: scu: support hole region check 

Introduce HOLE/ECC_REGION flag and in_hole helper to ease the check
of hole region. The ECC_REGION is also introduced here which is
preparing for programming support. ECC_REGION could only be programmed
once, so need take care.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20191029114240.14905-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peng Fan 2019-10-29 11:42:33 +00:00 committed by Greg Kroah-Hartman
parent 1e6d8e5f44
commit f8017bfc14
1 changed files with 42 additions and 5 deletions
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47
drivers/nvmem/imx-ocotp-scu.c
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@ -19,9 +19,20 @@ enum ocotp_devtype {
IMX8QM,
};
#define ECC_REGION BIT(0)
#define HOLE_REGION BIT(1)
struct ocotp_region {
u32 start;
u32 end;
u32 flag;
};
struct ocotp_devtype_data {
int devtype;
int nregs;
u32 num_region;
struct ocotp_region region[];
};
struct ocotp_priv {
@ -38,13 +49,41 @@ struct imx_sc_msg_misc_fuse_read {
static struct ocotp_devtype_data imx8qxp_data = {
.devtype = IMX8QXP,
.nregs = 800,
.num_region = 3,
.region = {
{0x10, 0x10f, ECC_REGION},
{0x110, 0x21F, HOLE_REGION},
{0x220, 0x31F, ECC_REGION},
},
};
static struct ocotp_devtype_data imx8qm_data = {
.devtype = IMX8QM,
.nregs = 800,
.num_region = 2,
.region = {
{0x10, 0x10f, ECC_REGION},
{0x1a0, 0x1ff, ECC_REGION},
},
};
static bool in_hole(void *context, u32 index)
{
struct ocotp_priv *priv = context;
const struct ocotp_devtype_data *data = priv->data;
int i;
for (i = 0; i < data->num_region; i++) {
if (data->region[i].flag & HOLE_REGION) {
if ((index >= data->region[i].start) &&
(index <= data->region[i].end))
return true;
}
}
return false;
}
static int imx_sc_misc_otp_fuse_read(struct imx_sc_ipc *ipc, u32 word,
u32 *val)
{
@ -91,11 +130,9 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
buf = p;
for (i = index; i < (index + count); i++) {
if (priv->data->devtype == IMX8QXP) {
if ((i > 271) && (i < 544)) {
*buf++ = 0;
continue;
}
if (in_hole(context, i)) {
*buf++ = 0;
continue;
}
ret = imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, i, buf);