Messages in this thread Patch in this message | | | From | Jiaxun Yang <> | Subject | [PATCH 3/4] lib: logic_pio: Introduce MMIO_LOWER_RESERVED | Date | Sun, 26 Apr 2020 19:47:36 +0800 |
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That would allow platforms reserve some lower address in PIO MMIO range to deal with legacy drivers with hardcoded I/O ports that can't be managed by logic_pio.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> --- lib/logic_pio.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/logic_pio.c b/lib/logic_pio.c index f511a99bb389..57fff1cb7063 100644 --- a/lib/logic_pio.c +++ b/lib/logic_pio.c @@ -20,6 +20,10 @@ static LIST_HEAD(io_range_list); static DEFINE_MUTEX(io_range_mutex); +#ifndef MMIO_LOWER_RESERVED +#define MMIO_LOWER_RESERVED 0 +#endif + /* Consider a kernel general helper for this */ #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) @@ -36,7 +40,7 @@ int logic_pio_register_range(struct logic_pio_hwaddr *new_range) struct logic_pio_hwaddr *range; resource_size_t start; resource_size_t end; - resource_size_t mmio_end = 0; + resource_size_t mmio_end = MMIO_LOWER_RESERVED; resource_size_t iio_sz = MMIO_UPPER_LIMIT; int ret = 0; -- 2.26.0.rc2
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