[U-Boot] [PATCH] mx6slevk: Add SPI NOR flash support

[Marek Vasut <marex@denx.de>]

On Saturday, April 12, 2014 at 12:30:51 PM, Jagan Teki wrote:
> On Fri, Apr 11, 2014 at 5:09 PM, Fabio Estevam <festevam@gmail.com> wrote:
> > From: Fabio Estevam <fabio.estevam@freescale.com>
> > 
> > mx6slevk has a m25p32 SPI NOR flash connected to ESCSPI port.
> > 
> > Add support for it.
> > 
> > Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> > ---
> > 
> >  arch/arm/include/asm/arch-mx6/mx6sl_pins.h |  4 ++++
> >  board/freescale/mx6slevk/mx6slevk.c        | 20 ++++++++++++++++++++
> >  include/configs/mx6slevk.h                 | 12 ++++++++++++
> >  3 files changed, 36 insertions(+)
> > 
> > diff --git a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
> > b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h index 5f9c90a..045ccc4
> > 100644
> > --- a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
> > +++ b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
> > @@ -10,6 +10,10 @@
> > 
> >  #include <asm/imx-common/iomux-v3.h>
> >  
> >  enum {
> > 
> > +       MX6_PAD_ECSPI1_MISO__ECSPI_MISO                         =
> > IOMUX_PAD(0x0358, 0x0068, 0, 0x0684, 0, 0), +      
> > MX6_PAD_ECSPI1_MOSI__ECSPI_MOSI                         =
> > IOMUX_PAD(0x035C, 0x006C, 0, 0x0688, 0, 0), +      
> > MX6_PAD_ECSPI1_SCLK__ECSPI_SCLK                         =
> > IOMUX_PAD(0x0360, 0x0070, 0, 0x067C, 0, 0), +      
> > MX6_PAD_ECSPI1_SS0__GPIO4_IO11                          =
> > IOMUX_PAD(0x0364, 0x0074, 5, 0x0000, 0, 0),
> > 
> >         MX6_PAD_SD2_CLK__USDHC2_CLK                             =
> >         IOMUX_PAD(0x055C, 0x0254, 0, 0x0000, 0, 0),
> >         MX6_PAD_SD2_CMD__USDHC2_CMD                             =
> >         IOMUX_PAD(0x0560, 0x0258, 0, 0x0000, 0, 0),
> >         MX6_PAD_SD2_DAT0__USDHC2_DAT0                           =
> >         IOMUX_PAD(0x0564, 0x025C, 0, 0x0000, 0, 0),
> > 
> > diff --git a/board/freescale/mx6slevk/mx6slevk.c
> > b/board/freescale/mx6slevk/mx6slevk.c index aadad32..d2b64cc 100644
> > --- a/board/freescale/mx6slevk/mx6slevk.c
> > +++ b/board/freescale/mx6slevk/mx6slevk.c
> > @@ -34,6 +34,9 @@ DECLARE_GLOBAL_DATA_PTR;
> > 
> >         PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |             \
> >         PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
> > 
> > +#define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
> > +                     PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
> > +
> > 
> >  #define ETH_PHY_RESET  IMX_GPIO_NR(4, 21)
> >  
> >  int dram_init(void)
> > 
> > @@ -71,6 +74,20 @@ static iomux_v3_cfg_t const fec_pads[] = {
> > 
> >         MX6_PAD_FEC_TX_CLK__GPIO_4_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
> >  
> >  };
> > 
> > +#ifdef CONFIG_MXC_SPI
> > +static iomux_v3_cfg_t ecspi1_pads[] = {
> > +       MX6_PAD_ECSPI1_MISO__ECSPI_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL),
> > +       MX6_PAD_ECSPI1_MOSI__ECSPI_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL),
> > +       MX6_PAD_ECSPI1_SCLK__ECSPI_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL),
> > +       MX6_PAD_ECSPI1_SS0__GPIO4_IO11  | MUX_PAD_CTRL(NO_PAD_CTRL),
> > +};
> > +
> > +static void setup_spi(void)
> > +{
> > +       imx_iomux_v3_setup_multiple_pads(ecspi1_pads,
> > ARRAY_SIZE(ecspi1_pads)); +}
> > +#endif
> > +
> > 
> >  static void setup_iomux_uart(void)
> >  {
> >  
> >         imx_iomux_v3_setup_multiple_pads(uart1_pads,
> >         ARRAY_SIZE(uart1_pads));
> > 
> > @@ -132,6 +149,9 @@ static int setup_fec(void)
> > 
> >  int board_early_init_f(void)
> >  {
> >  
> >         setup_iomux_uart();
> > 
> > +#ifdef CONFIG_MXC_SPI
> > +       setup_spi();
> > +#endif
> > 
> >         return 0;
> >  
> >  }
> > 
> > diff --git a/include/configs/mx6slevk.h b/include/configs/mx6slevk.h
> > index 1876dbf..3d05a64 100644
> > --- a/include/configs/mx6slevk.h
> > +++ b/include/configs/mx6slevk.h
> > @@ -10,6 +10,7 @@
> > 
> >  #define __CONFIG_H
> >  
> >  #include <asm/arch/imx-regs.h>
> > 
> > +#include <asm/imx-common/gpio.h>
> > 
> >  #include <linux/sizes.h>
> >  #include "mx6_common.h"
> > 
> > @@ -196,4 +197,15 @@
> > 
> >  #define CONFIG_CMD_CACHE
> >  #endif
> > 
> > +#define CONFIG_CMD_SF
> > +#ifdef CONFIG_CMD_SF
> > +#define CONFIG_SPI_FLASH
> > +#define CONFIG_SPI_FLASH_STMICRO
> > +#define CONFIG_MXC_SPI
> > +#define CONFIG_SF_DEFAULT_BUS          0
> 
> *no_need* to define DEFAULT_BUS as 0 - it's default.

We better be explicit here.