Re: [PATCH 1/2] ARM: multi_v7_defconfig: Enable shmobile platforms

[Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>]

Hi,

On Thursday, August 28, 2014 04:00:28 PM Geert Uytterhoeven wrote:
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> Based on next-20140828
> For now excluding r8a7740/armadillo, as it fails to boot on armadillo
> 
>  arch/arm/configs/multi_v7_defconfig | 51 +++++++++++++++++++++++++++++++++++--
>  1 file changed, 49 insertions(+), 2 deletions(-)

I've been looking lately into making it possible to easily go
from multi_v7_defconfig config to a single platform one (in my
case Exynos one) and removing the need to keep the latter (i.e.
exynos_defconfig) in the kernel tree in the long-term.

Because of this I've noticed that some config options for platform
specific hardware that are selected in multi_v7_defconfig don't
have proper dependencies.  This results in more complex than
necessary single platform configs (obtained from a multiplatform
config) and unnecessarily bigger resulting kernel images.

Your patch also adds/uncovers some such config options.

Lets first look at sizes of resulting vmlinux images for single
platform Exynos config before and after your patch:

  $ size vmlinux.*
     text    data     bss     dec     hex filename
  7817317  517188  278992 8613497  836e79 vmlinux.before
  7978325  527012  279056 8784393  860a09 vmlinux.after

  (=> the patch results in 170kB bigger vmlinux size)

and the configs diff later:

--- multi_v7_exynos_only	2014-08-29 12:29:31.881485357 +0200
+++ multi_v7_exynos_only_shmobile	2014-08-29 12:36:24.361496247 +0200
@@ -70,6 +70,8 @@
 CONFIG_BRCMSTB_GISB_ARB=y
 CONFIG_VEXPRESS_CONFIG=y
 CONFIG_MTD=y
+CONFIG_MTD_M25P80=y
+CONFIG_MTD_SPI_NOR=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_ICS932S401=y
 CONFIG_APDS9802ALS=y
@@ -86,11 +88,13 @@
 CONFIG_MVMDIO=y
 CONFIG_KS8851=y
 CONFIG_R8169=y
+CONFIG_SH_ETH=y

This seems to be option for Renesas specific hardware and it has
a footprint of 23kB.

[ I think that this option should depend on ARCH_SHMOBILE || ARCH_SH. ]

 CONFIG_SMSC911X=y
 CONFIG_STMMAC_ETH=y
 CONFIG_AT803X_PHY=y
 CONFIG_MARVELL_PHY=y
 CONFIG_ICPLUS_PHY=y
+CONFIG_MICREL_PHY=y

This gets selected by CONFIG_SH_ETH and costs us 4kB.

 CONFIG_USB_PEGASUS=y
 CONFIG_USB_USBNET=y
 CONFIG_USB_NET_SMSC75XX=y
@@ -110,6 +114,7 @@
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_8250_EM=y
 CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 CONFIG_SERIAL_SAMSUNG=y
@@ -122,11 +127,13 @@
 CONFIG_SERIAL_ST_ASC=y
 CONFIG_SERIAL_ST_ASC_CONSOLE=y
 CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MUX=y
 CONFIG_I2C_MUX_PCA954x=y
 CONFIG_I2C_MUX_PINCTRL=y
 CONFIG_I2C_DESIGNWARE_PLATFORM=y
 CONFIG_I2C_NOMADIK=y
 CONFIG_I2C_XILINX=y
+CONFIG_SPI=y
 CONFIG_SPI_CADENCE=y
 CONFIG_SPI_PL022=y
 CONFIG_SPI_XILINX=y
@@ -135,6 +142,7 @@
 CONFIG_PINCTRL_PALMAS=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_DWAPB=y
+CONFIG_GPIO_EM=y
 CONFIG_GPIO_PL061=y
 CONFIG_GPIO_PCA953X=y
 CONFIG_GPIO_PCA953X_IRQ=y
@@ -173,6 +181,7 @@
 CONFIG_REGULATOR_VIRTUAL_CONSUMER=y
 CONFIG_REGULATOR_AS3722=y
 CONFIG_REGULATOR_BCM590XX=y
+CONFIG_REGULATOR_DA9210=y
 CONFIG_REGULATOR_GPIO=y
 CONFIG_REGULATOR_MAX8907=y
 CONFIG_REGULATOR_PALMAS=y
@@ -187,9 +196,18 @@
 CONFIG_REGULATOR_VEXPRESS=y
 CONFIG_MEDIA_SUPPORT=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y
+CONFIG_MEDIA_CONTROLLER=y
+CONFIG_VIDEO_V4L2_SUBDEV_API=y
 CONFIG_MEDIA_USB_SUPPORT=y
 CONFIG_USB_VIDEO_CLASS=y
 CONFIG_USB_GSPCA=y
+CONFIG_V4L_PLATFORM_DRIVERS=y
+CONFIG_SOC_CAMERA=y
+CONFIG_SOC_CAMERA_PLATFORM=y
+CONFIG_V4L_MEM2MEM_DRIVERS=y
+CONFIG_VIDEO_RENESAS_VSP1=y

This seems to be another option for Renesas specific hardware and it has
a footprint of 23kB.

[ I think that this option should depend on ARCH_SHMOBILE. ]

+# CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set
+CONFIG_VIDEO_ADV7180=y
 CONFIG_DRM=y
 CONFIG_FB=y
 CONFIG_FB_ARMCLCD=y
@@ -204,6 +222,7 @@
 CONFIG_SND_SOC=y
 CONFIG_SND_SOC_WM8753=y
 CONFIG_SND_SOC_WM8903=y
+CONFIG_SND_SIMPLE_CARD=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_EHCI_HCD=y
@@ -211,6 +230,7 @@
 CONFIG_USB_ISP1760_HCD=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_RENESAS_USBHS=y

It seems to be yet another option for Renesas specific hardware and it
has a footprint of 18kB.

[ I think that this option should depend on ARCH_SHMOBILE || ARCH_SH. ]

 CONFIG_USB_STORAGE=y
 CONFIG_USB_CHIPIDEA=y
 CONFIG_USB_CHIPIDEA_HOST=y
@@ -220,6 +240,8 @@
 CONFIG_USB_GPIO_VBUS=y
 CONFIG_USB_ISP1301=y
 CONFIG_USB_ULPI=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_RENESAS_USBHS_UDC=y

This one depends on CONFIG_USB_RENESAS_USBHS and costs us 3kB.

 CONFIG_MMC=y
 CONFIG_MMC_BLOCK_MINORS\x16
 CONFIG_MMC_ARMMMCI=y

In total by fixing the above three options to have correct dependencies
it is possible to recover 86kB out of 170kB of vmlinux size inrease for
a single platform only config derived from a multiplatform one.

Simon/Magnus, is it okay to send patches fixing

  CONFIG_SH_ETH
  CONFIG_VIDEO_RENESAS_VSP1
  CONFIG_USB_RENESAS_USBHS

dependencies?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics