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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Adaptive Body Bias programming sequence for OMAP5 family
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*
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* (C) Copyright 2013
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* Texas Instruments, <www.ti.com>
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*
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* Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
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*/
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#include <common.h>
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#include <asm/omap_common.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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/*
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* Setup LDOVBB for OMAP5.
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* On OMAP5+ some ABB settings are fused. They are handled
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* in the following way:
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*
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* 1. corresponding EFUSE register contains ABB enable bit
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* and VSET value
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* 2. If ABB enable bit is set to 1, than ABB should be
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* enabled, otherwise ABB should be disabled
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* 3. If ABB is enabled, than VSET value should be copied
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* to corresponding MUX control register
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*/
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s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb)
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{
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u32 vset;
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u32 fuse_enable_mask = OMAP5_PROD_ABB_FUSE_ENABLE_MASK;
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u32 fuse_vset_mask = OMAP5_PROD_ABB_FUSE_VSET_MASK;
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if (!is_omap54xx()) {
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/* DRA7 */
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fuse_enable_mask = DRA7_ABB_FUSE_ENABLE_MASK;
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fuse_vset_mask = DRA7_ABB_FUSE_VSET_MASK;
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}
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/*
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* ABB parameters must be properly fused
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* otherwise ABB should be disabled
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*/
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vset = readl(fuse);
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if (!(vset & fuse_enable_mask))
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return -1;
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/* prepare VSET value for LDOVBB mux register */
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vset &= fuse_vset_mask;
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vset >>= ffs(fuse_vset_mask) - 1;
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vset <<= ffs(OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK) - 1;
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vset |= OMAP5_ABB_LDOVBBMPU_MUX_CTRL_MASK;
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/* setup LDOVBB using fused value */
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clrsetbits_le32(ldovbb, OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK, vset);
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return 0;
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}
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