drivers: Introduce dev_set_name() ...

Introduce dev_set_name() in order to hide implementation details of
setting device's name so it'd be easier to change it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Only register actually equipped fuses ...

The IIM unit in defferent i.MX SoCs is always the same, but the
number of actually equipped fuses differs between the SoCs.
Reading nonexistent fuses oopses, so only register the fuses
we can actually read.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: fix potential out of bounds array access ...

The check is off-by-one.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Remove debug printk ...

The dev_info is a debug leftover that was never intended to go upstream.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: IIM: Add function to enable permanent write ...

This adds a function to enable/disable permanent write for the IIM
module so that C users no longer have to fiddle with device parameters.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: IIM: Add functions to access fuses field wise ...

Accessing the IIM registers is cumbersome. The fuses are documented with
different register strides and there is no header file available, so the
different fields have to be read in the datasheets and translated into
the barebox format over and over again. This patch adds a header file
which has defines for the various fuses (for i.MX25 only so far, but
others can be added later) along with C functions to read/write the
fields.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

string: Fix (v)asprintf prototypes ...

Our asprintf and vasprintf have different prototypes than the glibc
functions. This causes trouble when we want to share barebox code
with userspace code. Change the prototypes for (v)asprintf to match
the glibc prototypes. Since the current (v)asprintf are convenient
to use change the existing functions to b(v)asprintf.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: replace dev_request_mem_region with dev_request_mem_resource ...

dev_request_mem_region doesn't work properly one some SoCs on which
PTR_ERR() values clash with valid return values from dev_request_mem_region.
Replace them with dev_request_mem_resource where possible.

This patch has been generated with the following semantic patch:

// <smpl>
@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
...
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
-	ret = PTR_ERR(io);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
+	ret = PTR_ERR(iores);
...
}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
identifier func;
@@
func(...) {
<+...
struct resource *iores;
-struct resource *iores;
...+>
}
// </smpl>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Switch to regmap support ...

To provide consumers easier access to the IIM.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: use 'const void *' for struct of_device_id.data ...

Since 2011 barebox' of_device_id struct uses unsigned long type for data field:

    struct of_device_id {
            char *compatible;
            unsigned long data;
    };

Almost always struct of_device_id.data field are used as pointer
and need 'unsigned long' casting.

E.g. see 'git grep -A 4 of_device_id drivers/' output:

    drivers/ata/sata-imx.c:static __maybe_unused struct of_device_id imx_sata_dt_ids[] = {
    drivers/ata/sata-imx.c- {
    drivers/ata/sata-imx.c-         .compatible = "fsl,imx6q-ahci",
    drivers/ata/sata-imx.c-         .data = (unsigned long)&data_imx6,
    drivers/ata/sata-imx.c- }, {

Here is of_device_id struct in linux kernel v4.0:

    struct of_device_id {
            char name[32];
            char type[32];
            char compatible[128];
            const void *data;
    };

Changing of_device_id.data type to 'const void *data' will increase
barebox' linux kernel compatibility and decrease number of 'unsigned
long' casts.

Part of the patch was done using the 'coccinelle' tool with the
following semantic patch:

    @rule1@
    identifier dev;
    identifier type;
    identifier func;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type)
    + dev_get_drvdata(dev, (const void **)&type)
    ...>
    }
    @rule2@
    identifier dev;
    identifier type;
    identifier func;
    identifier data;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type->data)
    + dev_get_drvdata(dev, (const void **)&type->data)
    ...>
    }

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arm: imx: iim/ocotp: fix link error when !CONFIG_NET ...

Don't try to attach mac to device if there is no net support selected.
Fixes:
undefined reference to `dev_add_param_mac' in both iim and ocotp drivers.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

resource: Let dev_request_mem_region return an error pointer ...

For all users fix or add the error check.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Add regulator support ...

The voltage for programming the fuses is external to the SoC and
on some boards this is controllable with a regulator, so add regulator
support to the iim driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: provide a MAC address convenience variable ...

Allow to read/write the registered MAC addresses in the iim
module directly via a device parameter.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: make fuse blowing work on i.MX5 ...

The i.MX5 iim has an additional bit in the CCM module which
enables the supply. Add support for it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: don't make detour over cdev API ...

imx_iim_read is a iim internal function, so access the
internal functions rather than using the cdev API.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: move static variables into driver struct ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: use dev_* for messages ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: pass private data struct to imx_iim_fuse_sense ...

To make all struct members available and to reduce the argument
count.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: pass private data struct to imx_iim_fuse_blow ...

To make all struct members available and to reduce the argument
count.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: register iim device ...

With devicetree devicenames start with numbers. Parameters on these
devices are not accessible since variables can't start with numbers.
Register a logical 'iim' device which makes the permanent_write_enable
and explicit_sense_enable parameters accessible again.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Add namespace to functions ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: introduce private data struct ...

Instead of duplicating data shared between the banks in a bank
specific struct, use a iim struct and a bank struct.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Check result of dev_request_mem_region ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: Add missing includes ...

A lot of files rely on include/driver.h including include/of.h (and
this including include/errno.h. include the files explicitly so we can
eventually get rid of including of.h from driver.h

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX5x: Make IIM driver kernel-compatible ...

Since kernel uses "imx27-iim" compatible string in i.MX5x DTS templates,
do IIM driver compatible.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Add devicetree probe support ...

Only adds the dt ids.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: remove unused .mac_addr_base in iim ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: iim: Use dev_add_param_bool for parameters ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

switch all platform_bus device/driver registering to platform_driver/device_register ...

now register_driver and register_device are for bus only usage.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>