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up_adc_common: Allow to disable GPIO and START_CODE registers 

Not all peripherals use the GPIO and START_CODE register settings, but the
registers still take up a fair amount of space in the register map. Add
options to allow to disable them when not needed. This helps to reduce the
utilization for peripherals where these features are not needed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
main
Lars-Peter Clausen 2017-03-17 12:29:09 +01:00
parent 71394ee465
commit 0ae0da488b
1 changed files with 29 additions and 5 deletions
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34
library/common/up_adc_common.v
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@ -45,7 +45,9 @@ module up_adc_common #(
parameter CONFIG = 0,
parameter COMMON_ID = 6'h00,
parameter DRP_DISABLE = 6'h00,
parameter USERPORTS_DISABLE = 0) (
parameter USERPORTS_DISABLE = 0,
parameter GPIO_DISABLE = 0,
parameter START_CODE_DISABLE = 0) (
// clock reset
@ -285,19 +287,41 @@ module up_adc_common #(
assign up_adc_gpio_out = up_adc_gpio_out_int;
generate
if (GPIO_DISABLE == 1) begin
always @(posedge up_clk) begin
up_adc_gpio_out_int <= 'd0;
end
end else begin
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_adc_start_code <= 'd0;
up_adc_gpio_out_int <= 'd0;
end else begin
if ((up_wreq_s == 1'b1) && (up_waddr[7:0] == 8'h29)) begin
up_adc_start_code <= up_wdata[31:0];
end
if ((up_wreq_s == 1'b1) && (up_waddr[7:0] == 8'h2f)) begin
up_adc_gpio_out_int <= up_wdata;
end
end
end
end
endgenerate
generate
if (START_CODE_DISABLE == 1) begin
always @(posedge up_clk) begin
up_adc_start_code <= 'd0;
end
end else begin
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_adc_start_code <= 'd0;
end else begin
if ((up_wreq_s == 1'b1) && (up_waddr[7:0] == 8'h29)) begin
up_adc_start_code <= up_wdata[31:0];
end
end
end
end
endgenerate
// processor read interface