/* * linux/drivers/video/bt455.h * * Copyright 2003 Thiemo Seufer * Copyright 2016 Maciej W. Rozycki * * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. */ #include /* * Bt455 byte-wide registers, 32-bit aligned. */ struct bt455_regs { volatile u8 addr_cmap; u8 pad0[3]; volatile u8 addr_cmap_data; u8 pad1[3]; volatile u8 addr_clr; u8 pad2[3]; volatile u8 addr_ovly; u8 pad3[3]; }; static inline void bt455_select_reg(struct bt455_regs *regs, int ir) { mb(); regs->addr_cmap = ir & 0x0f; } static inline void bt455_reset_reg(struct bt455_regs *regs) { mb(); regs->addr_clr = 0; } /* * Read/write to a Bt455 color map register. */ static inline void bt455_read_cmap_next(struct bt455_regs *regs, u8 *grey) { mb(); regs->addr_cmap_data; rmb(); *grey = regs->addr_cmap_data & 0xf; rmb(); regs->addr_cmap_data; } static inline void bt455_write_cmap_next(struct bt455_regs *regs, u8 grey) { wmb(); regs->addr_cmap_data = 0x0; wmb(); regs->addr_cmap_data = grey & 0xf; wmb(); regs->addr_cmap_data = 0x0; } static inline void bt455_write_ovly_next(struct bt455_regs *regs, u8 grey) { wmb(); regs->addr_ovly = 0x0; wmb(); regs->addr_ovly = grey & 0xf; wmb(); regs->addr_ovly = 0x0; } static inline void bt455_read_cmap_entry(struct bt455_regs *regs, int cr, u8 *grey) { bt455_select_reg(regs, cr); bt455_read_cmap_next(regs, grey); } static inline void bt455_write_cmap_entry(struct bt455_regs *regs, int cr, u8 grey) { bt455_select_reg(regs, cr); bt455_write_cmap_next(regs, grey); } static inline void bt455_write_ovly_entry(struct bt455_regs *regs, u8 grey) { bt455_reset_reg(regs); bt455_write_ovly_next(regs, grey); } gtreecommitdiff
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authorDavid S. Miller <davem@davemloft.net>2017-02-07 16:29:30 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-07 16:29:30 -0500
commit3efa70d78f218e4c9276b0bac0545e5184c1c47b (patch)
treef4abe2f05e173023d2a262afd4aebb1e89fe6985 /sound/soc/codecs/wm5100.h
parent76e0e70e6452b971a69cc9794ff4a6715c11f7f2 (diff)
parent926af6273fc683cd98cd0ce7bf0d04a02eed6742 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
The conflict was an interaction between a bug fix in the netvsc driver in 'net' and an optimization of the RX path in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/soc/codecs/wm5100.h')