axi_gpio_expander: bugfix to allow using a subset of bank0

4b361036 · Grzegorz Daniluk · 9af7902f · 4b361036
Commit 4b361036 authored Apr 26, 2019 by Grzegorz Daniluk
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axi_gpio_expander.vhd modules/axi/axi_gpio_expander.vhd +4 -2

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--- a/modules/axi/axi_gpio_expander.vhd
+++ b/modules/axi/axi_gpio_expander.vhd
@@ -139,8 +139,10 @@ architecture behav of axi_gpio_expander is
    variable tmp : std_logic_vector(g_num-1 downto 0);
  begin
    tmp := orig;
-    if (bank = 0) then
-      tmp(31 downto 0) := rdata;
+    if (bank = 0 and g_num >= c_GPIOPS_BANK0) then
+      tmp(c_GPIOPS_BANK0-1 downto 0) := rdata;
+    elsif (bank = 0 and g_num < c_GPIOPS_BANK0) then
+      tmp := rdata(g_num-1 downto 0);
    else
      tmp(g_num-1 downto c_GPIOPS_BANK0) := rdata(g_num-c_GPIOPS_BANK0-1 downto 0);
    end if;