add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/arm/mach-imx/cpu-imx27.c
..
..
@@ -1,20 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
1
2
 /*
2
3
  * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
3
4
  * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
4
- *
5
- * This program is free software; you can redistribute it and/or
6
- * modify it under the terms of the GNU General Public License
7
- * as published by the Free Software Foundation; either version 2
8
- * of the License, or (at your option) any later version.
9
- * This program is distributed in the hope that it will be useful,
10
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12
- * GNU General Public License for more details.
13
- *
14
- * You should have received a copy of the GNU General Public License
15
- * along with this program; if not, write to the Free Software
16
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
17
- * MA 02110-1301, USA.
18
5
  */
19
6
 
20
7
 /*
..
..
@@ -22,6 +9,7 @@
22
9
  */
23
10
 
24
11
 #include <linux/io.h>
12
+#include <linux/of_address.h>
25
13
 #include <linux/module.h>
26
14
 
27
15
 #include "hardware.h"
..
..
@@ -30,16 +18,24 @@
30
18
 static int mx27_cpu_partnumber;
31
19
 
32
20
 #define SYS_CHIP_ID             0x00    /* The offset of CHIP ID register */
21
+#define SYSCTRL_OFFSET		0x800	/* Offset from CCM base address */
33
22
 
34
23
 static int mx27_read_cpu_rev(void)
35
24
 {
25
+	void __iomem *ccm_base;
26
+	struct device_node *np;
36
27
 	u32 val;
28
+
29
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm");
30
+	ccm_base = of_iomap(np, 0);
31
+	of_node_put(np);
32
+	BUG_ON(!ccm_base);
37
33
 	/*
38
34
 	 * now we have access to the IO registers. As we need
39
35
 	 * the silicon revision very early we read it here to
40
36
 	 * avoid any further hooks
41
37
 	*/
42
-	val = imx_readl(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + SYS_CHIP_ID));
38
+	val = imx_readl(ccm_base + SYSCTRL_OFFSET + SYS_CHIP_ID);
43
39
 
44
40
 	mx27_cpu_partnumber = (int)((val >> 12) & 0xFFFF);
45
41