IRS_IST_CFGR_ISTSZ_SHIFT
cfgr |= istsz << IRS_IST_CFGR_ISTSZ_SHIFT;
cfgr |= istsz << IRS_IST_CFGR_ISTSZ_SHIFT;
#define IRS_IST_CFGR_ISTSZ_MASK (0x3 << IRS_IST_CFGR_ISTSZ_SHIFT)
(((x) & IRS_IST_CFGR_ISTSZ_MASK) >> IRS_IST_CFGR_ISTSZ_SHIFT)
#define IRS_IST_CFGR_ISTSZ_4 (0x0 << IRS_IST_CFGR_ISTSZ_SHIFT)
#define IRS_IST_CFGR_ISTSZ_8 (0x1 << IRS_IST_CFGR_ISTSZ_SHIFT)
#define IRS_IST_CFGR_ISTSZ_16 (0x2 << IRS_IST_CFGR_ISTSZ_SHIFT)