BS_CMD_WR_REG
broadsheet_gpio_issue_cmd(par, BS_CMD_WR_REG);
par->board->mmio_write(par, BS_MMIO_CMD, BS_CMD_WR_REG);
broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args);
broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args);
broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args);