6  * microcontroller is System Controller Unit (SCU) which, in particular,
7  * is servicing watchdog and controlling system reset function.
11  * SPDX-License-Identifier:	GPL-2.0+
39  * scu_ipc_send_command() - send command to SCU
50 	writel(cmd, &regs->cmd);  in scu_ipc_send_command()
54  * scu_ipc_check_status() - check status of last command
69 		status = readl(&regs->status);  in scu_ipc_check_status()
74 	} while (--loop_count);  in scu_ipc_check_status()
76 		return -ETIMEDOUT;  in scu_ipc_check_status()
80 		return -EIO;  in scu_ipc_check_status()
86 static int scu_ipc_cmd(struct ipc_regs *regs, u32 cmd, u32 sub,  in scu_ipc_cmd()  argument
92 		writel(*in++, &regs->wbuf[i]);  in scu_ipc_cmd()
94 	scu_ipc_send_command(regs, (inlen << 16) | (sub << 12) | cmd);  in scu_ipc_cmd()
99 			*out++ = readl(&regs->rbuf[i]);  in scu_ipc_cmd()
106  * scu_ipc_simple_command() - send a simple command
108  * @sub: sub type
117 int scu_ipc_simple_command(u32 cmd, u32 sub)  in scu_ipc_simple_command()  argument
129 	scu_ipc_send_command(scu->regs, sub << 12 | cmd);  in scu_ipc_simple_command()
130 	return scu_ipc_check_status(scu->regs);  in scu_ipc_simple_command()
133 int scu_ipc_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out, int outlen)  in scu_ipc_command()  argument
145 	return scu_ipc_cmd(scu->regs, cmd, sub, in, inlen, out, outlen);  in scu_ipc_command()
152 	scu->regs = syscon_get_first_range(X86_SYSCON_SCU);  in scu_ipc_probe()
158 	{ .compatible = "intel,scu-ipc", .data = X86_SYSCON_SCU },