On 01:27 Tue 21 Feb , Eric Bénard wrote: > - this is taken from freescale-mx35-3-stack/3stack.c and allows > this board to run Freescale's kernel which relies on the system > revision to configure the correct PMIC. > > - On rev0 boards (with DA9053), the log is : > detected i.MX53 rev 2.1 > MCIMX53-START board 1.0 > > On newer boards (rev A or B with MC34708), the log is : > mc34708-i2c@mc34708-i2c0: MC34708 ID: 0x0014 > detected i.MX53 rev 2.1 > MCIMX53-START-R board 1.0 rev B > > Signed-off-by: Eric Bénard <e...@eukrea.com> > --- > arch/arm/boards/freescale-mx53-loco/board.c | 51 > +++++++++++++++++++++++++++ > 1 files changed, 51 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/boards/freescale-mx53-loco/board.c > b/arch/arm/boards/freescale-mx53-loco/board.c > index 66ff040..6c0e1d1 100644 > --- a/arch/arm/boards/freescale-mx53-loco/board.c > +++ b/arch/arm/boards/freescale-mx53-loco/board.c > @@ -103,6 +103,31 @@ static struct i2c_board_info i2c_devices[] = { > }, > }; > > +/* > + * Revision to be passed to kernel. The kernel provided > + * by freescale relies on this. > + * > + * C --> CPU type > + * S --> Silicon revision > + * B --> Board rev > + * > + * 31 20 16 12 8 4 0 > + * | Cmaj | Cmin | B | Smaj | Smin| > + * > + * e.g 0x00053120 --> i.MX35, Cpu silicon rev 2.0, Board rev 2 > +*/ > +static unsigned int loco_system_rev = 0x00053000; > + > +static void set_silicon_rev( int rev) > +{ > + loco_system_rev = loco_system_rev | (rev & 0xFF); > +} > + > +static void set_board_rev(int rev) > +{ > + loco_system_rev = (loco_system_rev & ~(0xF << 8)) | (rev & 0xF) << 8; > +} > + > static int loco_mem_init(void) > { > arm_add_mem_device("ram0", 0x70000000, SZ_512M); > @@ -149,6 +174,8 @@ static int loco_devices_init(void) > > loco_fec_reset(); > > + set_silicon_rev(imx_silicon_revision()); > + > armlinux_set_bootparams((void *)0x70000100); > armlinux_set_architecture(MACH_TYPE_MX53_LOCO); > > @@ -177,3 +204,27 @@ static int loco_console_init(void) > } > > console_initcall(loco_console_init); > + > +static int loco_pmic_init(void) > +{ > + struct mc34708 *mc34708; > + int rev; > + > + mc34708 = mc34708_get(); please check the file exist > + if (!mc34708) { > + /* so we have a DA9053 based board */ > + printf("MCIMX53-START board 1.0\n"); > + armlinux_set_revision(loco_system_rev); please do not duplicate it > + return 0; > + } > + > + /* get the board revision from fuse */ > + rev = readl(MX53_IIM_BASE_ADDR + 0x878); > + set_board_rev(rev); > + printf("MCIMX53-START-R board 1.0 rev %c\n", (rev == 1) ? 'A' : 'B' ); > + armlinux_set_revision(loco_system_rev); > + > + return 0; > +} Best Regards, J.
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