target/linux/apm821xx/patches-4.14/302-0001-dt-bindings-add-protection-control-property.patch

   1 From bc183b1da77d6e2fbc801327a1811d446d34f54f Mon Sep 17 00:00:00 2001
   2 From: Christian Lamparter <chunkeey@gmail.com>
   3 Date: Wed, 31 Oct 2018 22:20:46 +0100
   4 Subject: [PATCH 1/2] dt-bindings: add protection control property
   5
   6 This patch adds the protection control property and
   7 dt-binding definitions for the DesignWare AHB Central
   8 Direct Memory Access Controller.
   9
  10 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
  11 ---
  12  include/dt-bindings/dma/dw-dmac.h             | 20 +++++++++++++++++++
  13  1 files changed, 20 insertions(+), 0 deletion(-)
  14  create mode 100644 include/dt-bindings/dma/dw-dmac.h
  15
  16 --- /dev/null
  17 +++ b/include/dt-bindings/dma/dw-dmac.h
  18 @@ -0,0 +1,20 @@
  19 +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
  20 +
  21 +#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
  22 +#define __DT_BINDINGS_DMA_DW_DMAC_H__
  23 +
  24 +#define DW_DMAC_CHAN_ALLOCATION_ASCENDING       0       /* zero to seven */
  25 +#define DW_DMAC_CHAN_ALLOCATION_DESCENDING      1       /* seven to zero */
  26 +#define DW_DMAC_CHAN_PRIORITY_ASCENDING         0       /* chan0 highest */
  27 +#define DW_DMAC_CHAN_PRIORITY_DESCENDING        1       /* chan7 highest */
  28 +
  29 +/*
  30 + * Protection Control bits provide protection against illegal transactions.
  31 + * The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
  32 + * The AHB HPROT[0] bit is hardwired to 1: Data Access.
  33 + */
  34 +#define DW_DMAC_HPROT1_PRIVILEGED_MODE (1 << 0)        /* Privileged Mode */
  35 +#define DW_DMAC_HPROT2_BUFFERABLE      (1 << 1)        /* DMA is bufferable */
  36 +#define DW_DMAC_HPROT3_CACHEABLE       (1 << 2)        /* DMA is cacheable */
  37 +
  38 +#endif /* __DT_BINDINGS_DMA_DW_DMAC_H__ */