[PATCH 1/5] ARM: mx5: Allow CCM definitions to work on MX51 and MX53

[Fabio Estevam]

On Sat, Aug 27, 2011 at 8:19 AM, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> On Fri, Aug 26, 2011 at 04:21:57PM -0300, Fabio Estevam wrote:
>> Allow CCM (Clock Control Module) definitions to work on MX51 and MX53
>> by checking the cpu type in run-time and using the appropriate register bases.
>
> They already work on i.MX51 and i.MX53. They have different physical
> addresses, but have (more or less accidently...) the same virtual
> address.

Without this patch I get a kernel crash on MX53 at
arch/arm/mach-mx5/system.c , when trying to read
the following registers CCM registers:

void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode)
{
	u32 plat_lpc, arm_srpgcr, ccm_clpcr;
	u32 empgc0, empgc1;
	int stop_mode = 0;

	/* always allow platform to issue a deep sleep mode request */
	plat_lpc = __raw_readl(MXC_CORTEXA8_PLAT_LPC) &
	    ~(MXC_CORTEXA8_PLAT_LPC_DSM);
	ccm_clpcr = __raw_readl(MXC_CCM_CLPCR) & ~(MXC_CCM_CLPCR_LPM_MASK);
	arm_srpgcr = __raw_readl(MXC_SRPG_ARM_SRPGCR) & ~(MXC_SRPGCR_PCR);
	empgc0 = __raw_readl(MXC_SRPG_EMPGC0_SRPGCR) & ~(MXC_SRPGCR_PCR);
	empgc1 = __raw_readl(MXC_SRPG_EMPGC1_SRPGCR) & ~(MXC_SRPGCR_PCR);

Regards,

Fabio Estevam