Commit ecff7304 authored by David Brownell's avatar David Brownell
Browse files

ARM: ADIv5, deadcode cleanup

I have no idea what the scan_inout_check() was *expecting* to achieve by
issuing a read of the DP_RDBUFF register.  But in any case, that code was
clearly never being called ("invalue" always NULL) ... so remove it, and
the associated comment.

Also rename it as ap_write_check(), facilitating a cleanup of its single
call site by removing constant parameters.

Signed-off-by: default avatarDavid Brownell <>
parent 39cfe627
......@@ -188,23 +188,24 @@ static int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp,
return retval;
/* scan_inout_check adds one extra inscan for DPAP_READ commands to read variables */
static int scan_inout_check(struct swjdp_common *swjdp,
uint8_t instr, uint8_t reg_addr, uint8_t RnW,
uint8_t *outvalue, uint8_t *invalue)
* Utility to write AP registers.
static int ap_write_check(struct swjdp_common *dap,
uint8_t reg_addr, uint8_t *outvalue)
adi_jtag_dp_scan(swjdp, instr, reg_addr, RnW, outvalue, NULL, NULL);
adi_jtag_dp_scan(dap, JTAG_DP_APACC, reg_addr, DPAP_WRITE,
outvalue, NULL, NULL);
if ((RnW == DPAP_READ) && (invalue != NULL))
adi_jtag_dp_scan(swjdp, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack);
/* REVISIT except in dap_setup_accessport() almost all call paths
* set up COMPOSITE. Probably worth just inlining the scan...
/* In TRANS_MODE_ATOMIC all JTAG_DP_APACC transactions wait for
* ack = OK/FAULT and the check CTRL_STAT
if ((instr == JTAG_DP_APACC)
&& (swjdp->trans_mode == TRANS_MODE_ATOMIC))
return jtagdp_transaction_endcheck(swjdp);
if (dap->trans_mode == TRANS_MODE_ATOMIC)
return jtagdp_transaction_endcheck(dap);
return ERROR_OK;
......@@ -432,8 +433,7 @@ static int dap_ap_write_reg(struct swjdp_common *swjdp,
if (retval != ERROR_OK)
return retval;
return scan_inout_check(swjdp, JTAG_DP_APACC, reg_addr,
DPAP_WRITE, out_value_buf, NULL);
return ap_write_check(swjdp, reg_addr, out_value_buf);
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