2 * Adaptive Body Bias programming sequence for OMAP5 family
5 * Texas Instruments, <www.ti.com>
7 * Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
9 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/omap_common.h>
17 * Setup LDOVBB for OMAP5.
18 * On OMAP5+ some ABB settings are fused. They are handled
19 * in the following way:
21 * 1. corresponding EFUSE register contains ABB enable bit
23 * 2. If ABB enable bit is set to 1, than ABB should be
24 * enabled, otherwise ABB should be disabled
25 * 3. If ABB is enabled, than VSET value should be copied
26 * to corresponding MUX control register
28 s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb)
31 u32 fuse_enable_mask = OMAP5_PROD_ABB_FUSE_ENABLE_MASK;
32 u32 fuse_vset_mask = OMAP5_PROD_ABB_FUSE_VSET_MASK;
36 fuse_enable_mask = DRA7_ABB_FUSE_ENABLE_MASK;
37 fuse_vset_mask = DRA7_ABB_FUSE_VSET_MASK;
40 * ABB parameters must be properly fused
41 * otherwise ABB should be disabled
44 if (!(vset & fuse_enable_mask))
47 /* prepare VSET value for LDOVBB mux register */
48 vset &= fuse_vset_mask;
49 vset >>= ffs(fuse_vset_mask) - 1;
50 vset <<= ffs(OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK) - 1;
51 vset |= OMAP5_ABB_LDOVBBMPU_MUX_CTRL_MASK;
53 /* setup LDOVBB using fused value */
54 clrsetbits_le32(ldovbb, OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK, vset);