Commit 1a5f77d3 authored by Philipp Zabel's avatar Philipp Zabel
Browse files

Merge tag 'sti-reset-for-v3.19-1' of... 

Merge tag 'sti-reset-for-v3.19-1' of git://git.stlinux.com/devel/kernel/linux-sti into reset/for_v3.19

STi reset controller updates for v3.19.

This tag adds support to STiH407 reset controllers:
  1. st,stih407-powerdown
  2. st,stih407-softreset
  3. st,stih407-picophyreset
parents 729de41b 4b171b3d

Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt

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STMicroelectronics STi family Sysconfig Picophy SoftReset Controller

=============================================================================



This binding describes a reset controller device that is used to enable and

disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in

the STi family SoC system configuration registers.



The actual action taken when softreset is asserted is hardware dependent.

However, when asserted it may not be possible to access the hardware's

registers and after an assert/deassert sequence the hardware's previous state

may no longer be valid.



Please refer to Documentation/devicetree/bindings/reset/reset.txt

for common reset controller binding usage.



Required properties:

- compatible: Should be "st,stih407-picophyreset"

- #reset-cells: 1, see below



Example:



	picophyreset: picophyreset-controller {

		compatible = "st,stih407-picophyreset";

		#reset-cells = <1>;

	};



Specifying picophyreset control of devices

=======================================



Device nodes should specify the reset channel required in their "resets"

property, containing a phandle to the picophyreset device node and an

index specifying which channel to use, as described in

Documentation/devicetree/bindings/reset/reset.txt.



Example:



	usb2_picophy0: usbpicophy@0 {

		resets = <&picophyreset STIH407_PICOPHY0_RESET>;

	};



Macro definitions for the supported reset channels can be found in:

include/dt-bindings/reset-controller/stih407-resets.h

drivers/reset/sti/Kconfig

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@@ -12,4 +12,8 @@ config STIH416_RESET 
	bool

	select STI_RESET_SYSCFG



config STIH407_RESET

	bool

	select STI_RESET_SYSCFG



endif

drivers/reset/sti/Makefile

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@@ -2,3 +2,4 @@ obj-$(CONFIG_STI_RESET_SYSCFG) += reset-syscfg.o 


obj-$(CONFIG_STIH415_RESET) += reset-stih415.o

obj-$(CONFIG_STIH416_RESET) += reset-stih416.o

obj-$(CONFIG_STIH407_RESET) += reset-stih407.o

drivers/reset/sti/reset-stih407.c

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/*

 * Copyright (C) 2014 STMicroelectronics (R&D) Limited

 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <dt-bindings/reset-controller/stih407-resets.h>

#include "reset-syscfg.h"



/* STiH407 Peripheral powerdown definitions. */

static const char stih407_core[] = "st,stih407-core-syscfg";

static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";

static const char stih407_lpm[] = "st,stih407-lpm-syscfg";



#define STIH407_PDN_0(_bit) \

	_SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit)

#define STIH407_PDN_1(_bit) \

	_SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit)

#define STIH407_PDN_ETH(_bit, _stat) \

	_SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat)



/* Powerdown requests control 0 */

#define SYSCFG_5000	0x0

#define SYSSTAT_5500	0x7d0

/* Powerdown requests control 1 (High Speed Links) */

#define SYSCFG_5001	0x4

#define SYSSTAT_5501	0x7d4



/* Ethernet powerdown/status/reset */

#define SYSCFG_4032	0x80

#define SYSSTAT_4520	0x820

#define SYSCFG_4002	0x8



static const struct syscfg_reset_channel_data stih407_powerdowns[] = {

	[STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1),

	[STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0),

	[STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6),

	[STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5),

	[STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4),

	[STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3),

	[STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2),

	[STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1),

	[STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0),

	[STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2),

};



/* Reset Generator control 0/1 */

#define SYSCFG_5131	0x20c

#define SYSCFG_5132	0x210



#define LPM_SYSCFG_1	0x4	/* Softreset IRB & SBC UART */



#define STIH407_SRST_CORE(_reg, _bit) \

	_SYSCFG_RST_CH_NO_ACK(stih407_core, _reg, _bit)



#define STIH407_SRST_SBC(_reg, _bit) \

	_SYSCFG_RST_CH_NO_ACK(stih407_sbc_reg, _reg, _bit)



#define STIH407_SRST_LPM(_reg, _bit) \

	_SYSCFG_RST_CH_NO_ACK(stih407_lpm, _reg, _bit)



static const struct syscfg_reset_channel_data stih407_softresets[] = {

	[STIH407_ETH1_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 4),

	[STIH407_MMC1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 3),

	[STIH407_USB2_PORT0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 28),

	[STIH407_USB2_PORT1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 29),

	[STIH407_PICOPHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 30),

	[STIH407_IRB_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 6),

	[STIH407_PCIE0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 6),

	[STIH407_PCIE1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 15),

	[STIH407_SATA0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 7),

	[STIH407_SATA1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 16),

	[STIH407_MIPHY0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 4),

	[STIH407_MIPHY1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 13),

	[STIH407_MIPHY2_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 22),

	[STIH407_SATA0_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 5),

	[STIH407_SATA1_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 14),

	[STIH407_DELTA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 3),

	[STIH407_BLITTER_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 10),

	[STIH407_HDTVOUT_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 11),

	[STIH407_HDQVDP_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 12),

	[STIH407_VDP_AUX_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 14),

	[STIH407_COMPO_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 15),

	[STIH407_HDMI_TX_PHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 21),

	[STIH407_JPEG_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 23),

	[STIH407_VP8_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 24),

	[STIH407_GPU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 30),

	[STIH407_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 0),

	[STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1),

	[STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2),

	[STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8),

};



/* PicoPHY reset/control */

#define SYSCFG_5061	0x0f4



static const struct syscfg_reset_channel_data stih407_picophyresets[] = {

	[STIH407_PICOPHY0_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 5),

	[STIH407_PICOPHY1_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 6),

	[STIH407_PICOPHY2_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 7),

};



static const struct syscfg_reset_controller_data stih407_powerdown_controller = {

	.wait_for_ack = true,

	.nr_channels = ARRAY_SIZE(stih407_powerdowns),

	.channels = stih407_powerdowns,

};



static const struct syscfg_reset_controller_data stih407_softreset_controller = {

	.wait_for_ack = false,

	.active_low = true,

	.nr_channels = ARRAY_SIZE(stih407_softresets),

	.channels = stih407_softresets,

};



static const struct syscfg_reset_controller_data stih407_picophyreset_controller = {

	.wait_for_ack = false,

	.nr_channels = ARRAY_SIZE(stih407_picophyresets),

	.channels = stih407_picophyresets,

};



static struct of_device_id stih407_reset_match[] = {

	{

		.compatible = "st,stih407-powerdown",

		.data = &stih407_powerdown_controller,

	},

	{

		.compatible = "st,stih407-softreset",

		.data = &stih407_softreset_controller,

	},

	{

		.compatible = "st,stih407-picophyreset",

		.data = &stih407_picophyreset_controller,

	},

	{ /* sentinel */ },

};



static struct platform_driver stih407_reset_driver = {

	.probe = syscfg_reset_probe,

	.driver = {

		.name = "reset-stih407",

		.of_match_table = stih407_reset_match,

	},

};



static int __init stih407_reset_init(void)

{

	return platform_driver_register(&stih407_reset_driver);

}



arch_initcall(stih407_reset_init);

include/dt-bindings/reset-controller/stih407-resets.h

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/*

 * This header provides constants for the reset controller

 * based peripheral powerdown requests on the STMicroelectronics

 * STiH407 SoC.

 */

#ifndef _DT_BINDINGS_RESET_CONTROLLER_STIH407

#define _DT_BINDINGS_RESET_CONTROLLER_STIH407



/* Powerdown requests control 0 */

#define STIH407_EMISS_POWERDOWN		0

#define STIH407_NAND_POWERDOWN		1



/* Synp GMAC PowerDown */

#define STIH407_ETH1_POWERDOWN		2



/* Powerdown requests control 1 */

#define STIH407_USB3_POWERDOWN		3

#define STIH407_USB2_PORT1_POWERDOWN	4

#define STIH407_USB2_PORT0_POWERDOWN	5

#define STIH407_PCIE1_POWERDOWN		6

#define STIH407_PCIE0_POWERDOWN		7

#define STIH407_SATA1_POWERDOWN		8

#define STIH407_SATA0_POWERDOWN		9



/* Reset defines */

#define STIH407_ETH1_SOFTRESET		0

#define STIH407_MMC1_SOFTRESET		1

#define STIH407_PICOPHY_SOFTRESET	2

#define STIH407_IRB_SOFTRESET		3

#define STIH407_PCIE0_SOFTRESET		4

#define STIH407_PCIE1_SOFTRESET		5

#define STIH407_SATA0_SOFTRESET		6

#define STIH407_SATA1_SOFTRESET		7

#define STIH407_MIPHY0_SOFTRESET	8

#define STIH407_MIPHY1_SOFTRESET	9

#define STIH407_MIPHY2_SOFTRESET	10

#define STIH407_SATA0_PWR_SOFTRESET	11

#define STIH407_SATA1_PWR_SOFTRESET	12

#define STIH407_DELTA_SOFTRESET		13

#define STIH407_BLITTER_SOFTRESET	14

#define STIH407_HDTVOUT_SOFTRESET	15

#define STIH407_HDQVDP_SOFTRESET	16

#define STIH407_VDP_AUX_SOFTRESET	17

#define STIH407_COMPO_SOFTRESET		18

#define STIH407_HDMI_TX_PHY_SOFTRESET	19

#define STIH407_JPEG_DEC_SOFTRESET	20

#define STIH407_VP8_DEC_SOFTRESET	21

#define STIH407_GPU_SOFTRESET		22

#define STIH407_HVA_SOFTRESET		23

#define STIH407_ERAM_HVA_SOFTRESET	24

#define STIH407_LPM_SOFTRESET		25

#define STIH407_KEYSCAN_SOFTRESET	26

#define STIH407_USB2_PORT0_SOFTRESET	27

#define STIH407_USB2_PORT1_SOFTRESET	28



/* Picophy reset defines */

#define STIH407_PICOPHY0_RESET		0

#define STIH407_PICOPHY1_RESET		1

#define STIH407_PICOPHY2_RESET		2



#endif /* _DT_BINDINGS_RESET_CONTROLLER_STIH407 */

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