2 * Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
12 #include <linux/err.h>
15 #include <linux/of_address.h>
16 #include <linux/mfd/syscon.h>
17 #include <linux/regmap.h>
24 #define ANADIG_REG_2P5 0x130
25 #define ANADIG_REG_CORE 0x140
26 #define ANADIG_ANA_MISC0 0x150
27 #define ANADIG_USB1_CHRG_DETECT 0x1b0
28 #define ANADIG_USB2_CHRG_DETECT 0x210
29 #define ANADIG_DIGPROG 0x260
30 #define ANADIG_DIGPROG_IMX6SL 0x280
31 #define ANADIG_DIGPROG_IMX7D 0x800
33 #define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG 0x40000
34 #define BM_ANADIG_REG_2P5_ENABLE_PULLDOWN 0x8
35 #define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
36 #define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG 0x1000
37 /* Below MISC0_DISCON_HIGH_SNVS is only for i.MX6SL */
38 #define BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS 0x2000
39 #define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B 0x80000
40 #define BM_ANADIG_USB_CHRG_DETECT_EN_B 0x100000
42 static struct regmap
*anatop
;
44 static void imx_anatop_enable_weak2p5(bool enable
)
48 regmap_read(anatop
, ANADIG_ANA_MISC0
, &val
);
50 /* can only be enabled when stop_mode_config is clear. */
52 reg
+= (enable
&& (val
& BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG
) == 0) ?
54 regmap_write(anatop
, reg
, BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG
);
57 static void imx_anatop_enable_fet_odrive(bool enable
)
59 regmap_write(anatop
, ANADIG_REG_CORE
+ (enable
? REG_SET
: REG_CLR
),
60 BM_ANADIG_REG_CORE_FET_ODRIVE
);
63 static inline void imx_anatop_enable_2p5_pulldown(bool enable
)
65 regmap_write(anatop
, ANADIG_REG_2P5
+ (enable
? REG_SET
: REG_CLR
),
66 BM_ANADIG_REG_2P5_ENABLE_PULLDOWN
);
69 static inline void imx_anatop_disconnect_high_snvs(bool enable
)
71 regmap_write(anatop
, ANADIG_ANA_MISC0
+ (enable
? REG_SET
: REG_CLR
),
72 BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS
);
75 void imx_anatop_pre_suspend(void)
77 if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2
)
78 imx_anatop_enable_2p5_pulldown(true);
80 imx_anatop_enable_weak2p5(true);
82 imx_anatop_enable_fet_odrive(true);
85 imx_anatop_disconnect_high_snvs(true);
88 void imx_anatop_post_resume(void)
90 if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2
)
91 imx_anatop_enable_2p5_pulldown(false);
93 imx_anatop_enable_weak2p5(false);
95 imx_anatop_enable_fet_odrive(false);
98 imx_anatop_disconnect_high_snvs(false);
102 static void imx_anatop_usb_chrg_detect_disable(void)
104 regmap_write(anatop
, ANADIG_USB1_CHRG_DETECT
,
105 BM_ANADIG_USB_CHRG_DETECT_EN_B
106 | BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B
);
107 regmap_write(anatop
, ANADIG_USB2_CHRG_DETECT
,
108 BM_ANADIG_USB_CHRG_DETECT_EN_B
|
109 BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B
);
112 void __init
imx_init_revision_from_anatop(void)
114 struct device_node
*np
;
115 void __iomem
*anatop_base
;
116 unsigned int revision
;
118 u16 offset
= ANADIG_DIGPROG
;
120 np
= of_find_compatible_node(NULL
, NULL
, "fsl,imx6q-anatop");
121 anatop_base
= of_iomap(np
, 0);
122 WARN_ON(!anatop_base
);
123 if (of_device_is_compatible(np
, "fsl,imx6sl-anatop"))
124 offset
= ANADIG_DIGPROG_IMX6SL
;
125 if (of_device_is_compatible(np
, "fsl,imx7d-anatop"))
126 offset
= ANADIG_DIGPROG_IMX7D
;
127 digprog
= readl_relaxed(anatop_base
+ offset
);
128 iounmap(anatop_base
);
130 switch (digprog
& 0xff) {
132 revision
= IMX_CHIP_REVISION_1_0
;
135 revision
= IMX_CHIP_REVISION_1_1
;
138 revision
= IMX_CHIP_REVISION_1_2
;
141 revision
= IMX_CHIP_REVISION_1_3
;
144 revision
= IMX_CHIP_REVISION_1_4
;
148 * i.MX6DQ TO1.5 is defined as Rev 1.3 in Data Sheet, marked
149 * as 'D' in Part Number last character.
151 revision
= IMX_CHIP_REVISION_1_5
;
154 revision
= IMX_CHIP_REVISION_UNKNOWN
;
157 mxc_set_cpu_type(digprog
>> 16 & 0xff);
158 imx_set_soc_revision(revision
);
161 void __init
imx_anatop_init(void)
163 anatop
= syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
164 if (IS_ERR(anatop
)) {
165 pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__
);
169 imx_anatop_usb_chrg_detect_disable();