Hi,
We have got customized board based on IMX6D. Now, we are bringing up the board for which we are customizing U-Boot and compiling it.
Now, for some of the freescale boards ccgr_init() is like below
static void ccgr_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
writel(0xFFFFFFFF, &ccm->CCGR0);
writel(0xFFFFFFFF, &ccm->CCGR1);
writel(0xFFFFFFFF, &ccm->CCGR2);
writel(0xFFFFFFFF, &ccm->CCGR3);
writel(0xFFFFFFFF, &ccm->CCGR4);
writel(0xFFFFFFFF, &ccm->CCGR5);
writel(0xFFFFFFFF, &ccm->CCGR6);
writel(0x00260324, &ccm->cbcmr);
}
where as some of the boards ccgr_init() function is defined as below:
static void ccgr_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
writel(0x00C03F3F, &ccm->CCGR0);
writel(0x0030FC03, &ccm->CCGR1);
writel(0x0FFFC000, &ccm->CCGR2);
writel(0x3FF00000, &ccm->CCGR3);
writel(0x00FFF300, &ccm->CCGR4);
writel(0x0F0000C3, &ccm->CCGR5);
writel(0x000003FF, &ccm->CCGR6);
}
how to write ccgr_init() function for our board. how to arrive at those values.
also, i have another query on mx6_ddr_sysinfo () (from imx_ddr.h)
struct mx6_ddr_sysinfo {
u8 dsize; /* size of bus (in dwords: 0=16bit,1=32bit,2=64bit) */
u8 cs_density; /* density per chip select (Gb) */
u8 ncs; /* number chip selects used (1|2) */
char cs1_mirror;/* enable address mirror (0|1) */
char bi_on; /* Bank interleaving enable */
u8 rtt_nom; /* Rtt_Nom (DDR3_RTT_*) */
u8 rtt_wr; /* Rtt_Wr (DDR3_RTT_*) */
u8 ralat; /* Read Additional Latency (0-7) */
u8 walat; /* Write Additional Latency (0-3) */
u8 mif3_mode; /* Command prediction working mode */
u8 rst_to_cke; /* Time from SDE enable to CKE rise */
u8 sde_to_rst; /* Time from SDE enable until DDR reset# is high */
u8 pd_fast_exit;/* enable precharge powerdown fast-exit */
u8 ddr_type; /* DDR type: DDR3(0) or LPDDR2(1) */
};
in this .cs-density value should be given as 2 if our DDR is 2Gb per chip select. But some places like Sabresd they are using 24, and some places they are using 20 etc. how to get correct value.
