Re: [ 35/54] ARM: SAMSUNG: Add naming of s3c64xx-spi devices

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Sat, Nov 03, 2012 at 11:17:57PM -0700, Colin Cross wrote:
> On Mon, Oct 29, 2012 at 2:40 PM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> > 3.4-stable review patch.  If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Heiko Stuebner <heiko@sntech.de>
> >
> > commit 308b3afb97dc342e9c4f958d8b4c459ae0e22bd7 upstream.
> >
> > Commit a5238e360b71 (spi: s3c64xx: move controller information into driver
> > data) introduced separate device names for the different subtypes of the
> > spi controller but forgot to set these in the relevant machines.
> >
> > To fix this introduce a s3c64xx_spi_setname function and populate all
> > Samsung arches with the correct names. The function resides in a new
> > header, as the s3c64xx-spi.h contains driver platform data and should
> > therefore at some later point move out of the Samsung include dir.
> >
> > Tested on a s3c2416-based machine.
> >
> > Signed-off-by: Heiko Stuebner <heiko@sntech.de>
> > Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> > [s.nawrocki@samsung.com: tested on mach-exynos]
> > Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> > Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> >
> > ---
> >  arch/arm/mach-exynos/common.c                 |    5 ++++
> >  arch/arm/mach-s3c24xx/s3c2416.c               |    2 +
> >  arch/arm/mach-s3c24xx/s3c2443.c               |    4 +++
> >  arch/arm/mach-s5p64x0/common.c                |    3 ++
> >  arch/arm/mach-s5pc100/common.c                |    3 ++
> >  arch/arm/mach-s5pv210/common.c                |    3 ++
> >  arch/arm/plat-samsung/include/plat/spi-core.h |   30 ++++++++++++++++++++++++++
> >  7 files changed, 50 insertions(+)
> >
> > --- a/arch/arm/mach-exynos/common.c
> > +++ b/arch/arm/mach-exynos/common.c
> > @@ -44,6 +44,7 @@
> >  #include <plat/fimc-core.h>
> >  #include <plat/iic-core.h>
> >  #include <plat/tv-core.h>
> > +#include <plat/spi-core.h>
> >  #include <plat/regs-serial.h>
> >
> >  #include "common.h"
> > @@ -338,6 +339,8 @@ static void __init exynos4_map_io(void)
> >
> >         s5p_fb_setname(0, "exynos4-fb");
> >         s5p_hdmi_setname("exynos4-hdmi");
> > +
> > +       s3c64xx_spi_setname("exynos4210-spi");
> >  }
> >
> >  static void __init exynos5_map_io(void)
> > @@ -358,6 +361,8 @@ static void __init exynos5_map_io(void)
> >         s3c_i2c0_setname("s3c2440-i2c");
> >         s3c_i2c1_setname("s3c2440-i2c");
> >         s3c_i2c2_setname("s3c2440-i2c");
> > +
> > +       s3c64xx_spi_setname("exynos4210-spi");
> >  }
> >
> >  static void __init exynos4_init_clocks(int xtal)
> > --- a/arch/arm/mach-s3c24xx/s3c2416.c
> > +++ b/arch/arm/mach-s3c24xx/s3c2416.c
> > @@ -61,6 +61,7 @@
> >  #include <plat/nand-core.h>
> >  #include <plat/adc-core.h>
> >  #include <plat/rtc-core.h>
> > +#include <plat/spi-core.h>
> >
> >  static struct map_desc s3c2416_iodesc[] __initdata = {
> >         IODESC_ENT(WATCHDOG),
> > @@ -131,6 +132,7 @@ void __init s3c2416_map_io(void)
> >         /* initialize device information early */
> >         s3c2416_default_sdhci0();
> >         s3c2416_default_sdhci1();
> > +       s3c64xx_spi_setname("s3c2443-spi");
> >
> >         iotable_init(s3c2416_iodesc, ARRAY_SIZE(s3c2416_iodesc));
> >  }
> > --- a/arch/arm/mach-s3c24xx/s3c2443.c
> > +++ b/arch/arm/mach-s3c24xx/s3c2443.c
> > @@ -43,6 +43,7 @@
> >  #include <plat/nand-core.h>
> >  #include <plat/adc-core.h>
> >  #include <plat/rtc-core.h>
> > +#include <plat/spi-core.h>
> >
> >  static struct map_desc s3c2443_iodesc[] __initdata = {
> >         IODESC_ENT(WATCHDOG),
> > @@ -100,6 +101,9 @@ void __init s3c2443_map_io(void)
> >         s3c24xx_gpiocfg_default.set_pull = s3c2443_gpio_setpull;
> >         s3c24xx_gpiocfg_default.get_pull = s3c2443_gpio_getpull;
> >
> > +       /* initialize device information early */
> > +       s3c64xx_spi_setname("s3c2443-spi");
> > +
> >         iotable_init(s3c2443_iodesc, ARRAY_SIZE(s3c2443_iodesc));
> >  }
> >
> > --- a/arch/arm/mach-s5p64x0/common.c
> > +++ b/arch/arm/mach-s5p64x0/common.c
> > @@ -44,6 +44,7 @@
> >  #include <plat/sdhci.h>
> >  #include <plat/adc-core.h>
> >  #include <plat/fb-core.h>
> > +#include <plat/spi-core.h>
> >  #include <plat/gpio-cfg.h>
> >  #include <plat/regs-irqtype.h>
> >  #include <plat/regs-serial.h>
> > @@ -179,6 +180,7 @@ void __init s5p6440_map_io(void)
> >         /* initialize any device information early */
> >         s3c_adc_setname("s3c64xx-adc");
> >         s3c_fb_setname("s5p64x0-fb");
> > +       s3c64xx_spi_setname("s5p64x0-spi");
> >
> >         s5p64x0_default_sdhci0();
> >         s5p64x0_default_sdhci1();
> > @@ -193,6 +195,7 @@ void __init s5p6450_map_io(void)
> >         /* initialize any device information early */
> >         s3c_adc_setname("s3c64xx-adc");
> >         s3c_fb_setname("s5p64x0-fb");
> > +       s3c64xx_spi_setname("s5p64x0-spi");
> >
> >         s5p64x0_default_sdhci0();
> >         s5p64x0_default_sdhci1();
> > --- a/arch/arm/mach-s5pc100/common.c
> > +++ b/arch/arm/mach-s5pc100/common.c
> > @@ -45,6 +45,7 @@
> >  #include <plat/fb-core.h>
> >  #include <plat/iic-core.h>
> >  #include <plat/onenand-core.h>
> > +#include <plat/spi-core.h>
> >  #include <plat/regs-serial.h>
> >  #include <plat/watchdog-reset.h>
> >
> > @@ -165,6 +166,8 @@ void __init s5pc100_map_io(void)
> >         s3c_onenand_setname("s5pc100-onenand");
> >         s3c_fb_setname("s5pc100-fb");
> >         s3c_cfcon_setname("s5pc100-pata");
> > +
> > +       s3c64xx_spi_setname("s5pc100-spi");
> >  }
> >
> >  void __init s5pc100_init_clocks(int xtal)
> > --- a/arch/arm/mach-s5pv210/common.c
> > +++ b/arch/arm/mach-s5pv210/common.c
> > @@ -43,6 +43,7 @@
> >  #include <plat/iic-core.h>
> >  #include <plat/keypad-core.h>
> >  #include <plat/tv-core.h>
> > +#include <plat/spi-core.h>
> >  #include <plat/regs-serial.h>
> >
> >  #include "common.h"
> > @@ -196,6 +197,8 @@ void __init s5pv210_map_io(void)
> >
> >         /* setup TV devices */
> >         s5p_hdmi_setname("s5pv210-hdmi");
> > +
> > +       s3c64xx_spi_setname("s5pv210-spi");
> >  }
> >
> >  void __init s5pv210_init_clocks(int xtal)
> > --- /dev/null
> > +++ b/arch/arm/plat-samsung/include/plat/spi-core.h
> > @@ -0,0 +1,30 @@
> > +/*
> > + * Copyright (C) 2012 Heiko Stuebner <heiko@sntech.de>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +
> > +#ifndef __PLAT_S3C_SPI_CORE_H
> > +#define __PLAT_S3C_SPI_CORE_H
> > +
> > +/* These functions are only for use with the core support code, such as
> > + * the cpu specific initialisation code
> > + */
> > +
> > +/* re-define device name depending on support. */
> > +static inline void s3c64xx_spi_setname(char *name)
> > +{
> > +#ifdef CONFIG_S3C64XX_DEV_SPI0
> > +       s3c64xx_device_spi0.name = name;
> > +#endif
> > +#ifdef CONFIG_S3C64XX_DEV_SPI1
> > +       s3c64xx_device_spi1.name = name;
> > +#endif
> > +#ifdef CONFIG_S3C64XX_DEV_SPI2
> > +       s3c64xx_device_spi2.name = name;
> > +#endif
> > +}
> > +
> > +#endif /* __PLAT_S3C_SPI_CORE_H */
> >
> >
> > --
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> 
> This patch breaks Exynos5 spi on 3.4.17.  The patch with the bug that
> this patch was supposed to address went in to 3.6 and not 3.4, so this
> patch causes a driver name mismatch when applied to 3.4.

Ah, thanks for letting me know.  I'll revert this for the next stable
release.  It didn't get into any other older kernel (like 3.0 or 3.2),
and also needs to be reverted there, did it?

thanks,

greg k-h