[PATCH 0/8] drivers/mfd: Constify static struct resource

[PATCH 0/8] drivers/mfd: Constify static struct resource

[Rikard Falkeborn]

Constify a number of static struct resource to allow the compiler to put
them in read-only memory. Typically, the only usage of these is to assign
their address to the resources field in the mfd_cell struct, which is a
const pointer (a few drivers also read the value of the start field).

I went through the rest of the static instances of struct resource in
drivers/mfd and all of them are either directly modified by the driver
or has its address passed to mfd_add_devices() which takes a non-const
pointer.

The series is compile-tested only.

I split this into patches per maintainer, I'll happily split it (or squash
it) some other way if that's preferable.

Rikard Falkeborn (8):
  mfd: da: Constify static struct resource
  mfd: intel: Constify static struct resource
  mfd: Constify static struct resource in OMAP2+ drivers
  mfd: wm: Constify static struct resource
  mfd: lp8788: Constify static struct resource
  mfd: stmpe: Constify static struct resource
  mfd: sun4i-gpadc: Constify static struct resource
  mfd: Constify static struct resource

 drivers/mfd/88pm800.c                 |  2 +-
 drivers/mfd/88pm860x-core.c           | 50 ++++++++++++------------
 drivers/mfd/da9055-core.c             |  8 ++--
 drivers/mfd/da9062-core.c             | 24 ++++++------
 drivers/mfd/da9063-core.c             |  8 ++--
 drivers/mfd/da9150-core.c             |  6 +--
 drivers/mfd/hi655x-pmic.c             |  2 +-
 drivers/mfd/intel_msic.c              | 18 ++++-----
 drivers/mfd/intel_quark_i2c_gpio.c    |  4 +-
 drivers/mfd/intel_soc_pmic_bxtwc.c    | 14 +++----
 drivers/mfd/intel_soc_pmic_chtdc_ti.c | 10 ++---
 drivers/mfd/intel_soc_pmic_chtwc.c    |  4 +-
 drivers/mfd/intel_soc_pmic_crc.c      | 10 ++---
 drivers/mfd/ioc3.c                    | 16 ++++----
 drivers/mfd/lp8788.c                  |  4 +-
 drivers/mfd/max8925-core.c            | 56 +++++++++++++--------------
 drivers/mfd/rdc321x-southbridge.c     |  4 +-
 drivers/mfd/retu-mfd.c                |  4 +-
 drivers/mfd/rk808.c                   |  8 ++--
 drivers/mfd/stmpe.c                   | 10 ++---
 drivers/mfd/sun4i-gpadc.c             |  2 +-
 drivers/mfd/tc3589x.c                 |  4 +-
 drivers/mfd/tc6387xb.c                |  2 +-
 drivers/mfd/tc6393xb.c                |  6 +--
 drivers/mfd/tps65090.c                |  2 +-
 drivers/mfd/tps65217.c                |  4 +-
 drivers/mfd/tps6586x.c                |  2 +-
 drivers/mfd/tps65910.c                |  2 +-
 drivers/mfd/tps80031.c                |  2 +-
 drivers/mfd/wm831x-core.c             | 52 ++++++++++++-------------
 drivers/mfd/wm8994-core.c             |  4 +-
 31 files changed, 172 insertions(+), 172 deletions(-)

-- 
2.28.0

[PATCH 3/8] mfd: Constify static struct resource in OMAP2+ drivers

[Rikard Falkeborn]

Constify a number of static struct resource. The only usage of the
structs are to assign their address to the resources field in the
mfd_cell struct. This allows the compiler to put them in read-only
memory. Done with the help of Coccinelle.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
---
 drivers/mfd/tps65217.c | 4 ++--
 drivers/mfd/tps65910.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
index 2d9c282ec917..8027b0a9e14f 100644
--- a/drivers/mfd/tps65217.c
+++ b/drivers/mfd/tps65217.c
@@ -33,12 +33,12 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/tps65217.h>
 
-static struct resource charger_resources[] = {
+static const struct resource charger_resources[] = {
 	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
 	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
 };
 
-static struct resource pb_resources[] = {
+static const struct resource pb_resources[] = {
 	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
 };
 
diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index 11959021b50a..a6c28df7aa38 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -21,7 +21,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 
-static struct resource rtc_resources[] = {
+static const struct resource rtc_resources[] = {
 	{
 		.start  = TPS65910_IRQ_RTC_ALARM,
 		.end    = TPS65910_IRQ_RTC_ALARM,
-- 
2.28.0

Re: [PATCH 3/8] mfd: Constify static struct resource in OMAP2+ drivers

[Lee Jones]

On Tue, 22 Sep 2020, Rikard Falkeborn wrote:

> Constify a number of static struct resource. The only usage of the
> structs are to assign their address to the resources field in the
> mfd_cell struct. This allows the compiler to put them in read-only
> memory. Done with the help of Coccinelle.
> 
> Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
> ---
>  drivers/mfd/tps65217.c | 4 ++--
>  drivers/mfd/tps65910.c | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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