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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: i9tWJR9lbvzZ5SjzxhZL2wreggZ6xooxAYQ+mW5cx8YbTjEDe7B4ZkWDL4sfBA/LLSPD/UgPwtlQb6ilKpOe35+FYf74EZs7BwJbzr+xU/j7dkuuu0uJzOVOfFUszRNtTZeWU3hhFwY6b30gfUQQFMuoQVWZgzbVzxHePrU69DL69wmo/xLmmsJ4yTj9Ntu0gHXZE4QZiAd+hNwL5vfqciQRJoUbwN0ftR1Q/j4Bsm5oVf71BZtjb+trOO2jNu7fZtktWn8ZQgkWJigD/PlWv0BGOIo9foPMaPsHleGWWjD5crTWNgBoyBS+DgcXkELoeq4Lm/7YBuWOpTRs7ijFOU5sNoPSPRkWf7AtLo8GONqJCG54lcAztD64uRLTFwRfF14exu8GY15zaOpcCuLVZANcuvqxREb8OxzOb38cuAU= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 12b17aef-c8ea-4f89-a52d-08d742f1b65d X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Sep 2019 02:23:41.1655 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: XTKDOCU5zzGx2EkQF9dNTx4yB14/V/Yzp2l4Q6eLdCso9G+q8Z7Z6ueodJbX3GciSFudVmuAMlatLBG5nXlQBg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR04MB5338 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peng Fan 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 --- V2: Rebased on latest linux-next drivers/nvmem/imx-ocotp-scu.c | 47 ++++++++++++++++++++++++++++++++++++++-= ---- 1 file changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c index 61a17f943f47..030e27ba4dfb 100644 --- a/drivers/nvmem/imx-ocotp-scu.c +++ b/drivers/nvmem/imx-ocotp-scu.c @@ -19,9 +19,20 @@ enum ocotp_devtype { IMX8QM, }; =20 +#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[]; }; =20 struct ocotp_priv { @@ -38,13 +49,41 @@ struct imx_sc_msg_misc_fuse_read { static struct ocotp_devtype_data imx8qxp_data =3D { .devtype =3D IMX8QXP, .nregs =3D 800, + .num_region =3D 3, + .region =3D { + {0x10, 0x10f, ECC_REGION}, + {0x110, 0x21F, HOLE_REGION}, + {0x220, 0x31F, ECC_REGION}, + }, }; =20 static struct ocotp_devtype_data imx8qm_data =3D { .devtype =3D IMX8QM, .nregs =3D 800, + .num_region =3D 2, + .region =3D { + {0x10, 0x10f, ECC_REGION}, + {0x1a0, 0x1ff, ECC_REGION}, + }, }; =20 +static bool in_hole(void *context, u32 index) +{ + struct ocotp_priv *priv =3D context; + const struct ocotp_devtype_data *data =3D priv->data; + int i; + + for (i =3D 0; i < data->num_region; i++) { + if (data->region[i].flag & HOLE_REGION) { + if ((index >=3D data->region[i].start) && + (index <=3D 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 i= nt offset, buf =3D p; =20 for (i =3D index; i < (index + count); i++) { - if (priv->data->devtype =3D=3D IMX8QXP) { - if ((i > 271) && (i < 544)) { - *buf++ =3D 0; - continue; - } + if (in_hole(context, i)) { + *buf++ =3D 0; + continue; } =20 ret =3D imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, i, buf); --=20 2.16.4