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This pull request contains Broadcom ARM-based SoC/Kconfig changes for 4.15

Browse Source 
please pull the following:
 
 - Danilo removes the clock provider driver stubs which are no longer needed
   now that we have a proper CPRMAN clock provider driver
 
 - Stefan moves the SMP startup code for BCM2836 from the interrupt controller
   driver down to where it belongs in the architecture code, this was requested
   by Marc Zyngier before comitting any fixes to that code
 
 - Phil provides a fix for a future Raspberry Pi firmware which will make the
   secondary cores wait for an event and therefore requires the CPU onlining
   other cores to send such event (along with the appropriate barrier)
 
 - Florian fixes the BRCMSTB UART debug stub to work correctly when using an
   ARM BE8 kernel since there were some missing register read swapping needed
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Merge tag 'arm-soc/for-4.15/soc' of http://github.com/Broadcom/stblinux into next/soc

Pull "Broadcom soc changes for 4.15 (part 1)" from Florian Fainelli:

This pull request contains Broadcom ARM-based SoC/Kconfig changes for 4.15
please pull the following:

- Danilo removes the clock provider driver stubs which are no longer needed
  now that we have a proper CPRMAN clock provider driver

- Stefan moves the SMP startup code for BCM2836 from the interrupt controller
  driver down to where it belongs in the architecture code, this was requested
  by Marc Zyngier before comitting any fixes to that code

- Phil provides a fix for a future Raspberry Pi firmware which will make the
  secondary cores wait for an event and therefore requires the CPU onlining
  other cores to send such event (along with the appropriate barrier)

- Florian fixes the BRCMSTB UART debug stub to work correctly when using an
  ARM BE8 kernel since there were some missing register read swapping needed

* tag 'arm-soc/for-4.15/soc' of http://github.com/Broadcom/stblinux:
  ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping
  ARM: bcm2836: Send event when onlining other cores
  irqchip: bcm2836: Move SMP startup code to arch/arm (v2)
  clk: bcm2835: remove remains from stub clk driver
This commit is contained in:
Arnd Bergmann 2017-10-19 18:07:09 +02:00
commit e7ffa44d37
10 changed files with 132 additions and 139 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm/include/debug/brcmstb.S
View File

@ -58,6 +58,7 @@
/* Check SUN_TOP_CTRL base */
ldr \rp, =SUN_TOP_CTRL_BASE @ load SUN_TOP_CTRL PA
ldr \rv, [\rp, #0] @ get register contents
ARM_BE8( rev \rv, \rv )
and \rv, \rv, #0xffffff00 @ strip revision bits [7:0]
/* Chip specific detection starts here */
@ -98,11 +99,13 @@
.endm
.macro store, rd, rx:vararg
ARM_BE8( rev \rd, \rd )
str \rd, \rx
.endm
.macro load, rd, rx:vararg
ldr \rd, \rx
ARM_BE8( rev \rd, \rd )
.endm
.macro senduart,rd,rx

5
arch/arm/mach-bcm/Makefile
View File

@ -43,6 +43,11 @@ endif
# BCM2835
obj-$(CONFIG_ARCH_BCM2835) += board_bcm2835.o
ifeq ($(CONFIG_ARCH_BCM2835),y)
ifeq ($(CONFIG_ARM),y)
obj-$(CONFIG_SMP) += platsmp.o
endif
endif
# BCM5301X
obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o

11
arch/arm/mach-bcm/board_bcm2835.c
View File

@ -15,15 +15,11 @@
#include <linux/init.h>
#include <linux/irqchip.h>
#include <linux/of_address.h>
#include <linux/clk/bcm2835.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
static void __init bcm2835_init(void)
{
bcm2835_init_clocks();
}
#include "platsmp.h"
static const char * const bcm2835_compat[] = {
#ifdef CONFIG_ARCH_MULTI_V6
@ -31,11 +27,12 @@ static const char * const bcm2835_compat[] = {
#endif
#ifdef CONFIG_ARCH_MULTI_V7
"brcm,bcm2836",
"brcm,bcm2837",
#endif
NULL
};
DT_MACHINE_START(BCM2835, "BCM2835")
.init_machine = bcm2835_init,
.dt_compat = bcm2835_compat
.dt_compat = bcm2835_compat,
.smp = smp_ops(bcm2836_smp_ops),
MACHINE_END

38
arch/arm/mach-bcm/platsmp.c
View File

@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irqchip/irq-bcm2836.h>
#include <linux/jiffies.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -287,6 +288,38 @@ out:
return ret;
}
static int bcm2836_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
void __iomem *intc_base;
struct device_node *dn;
char *name;
name = "brcm,bcm2836-l1-intc";
dn = of_find_compatible_node(NULL, NULL, name);
if (!dn) {
pr_err("unable to find intc node\n");
return -ENODEV;
}
intc_base = of_iomap(dn, 0);
of_node_put(dn);
if (!intc_base) {
pr_err("unable to remap intc base register\n");
return -ENOMEM;
}
writel(virt_to_phys(secondary_startup),
intc_base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
dsb(sy);
sev();
iounmap(intc_base);
return 0;
}
static const struct smp_operations kona_smp_ops __initconst = {
.smp_prepare_cpus = bcm_smp_prepare_cpus,
.smp_boot_secondary = kona_boot_secondary,
@ -305,3 +338,8 @@ static const struct smp_operations nsp_smp_ops __initconst = {
.smp_boot_secondary = nsp_boot_secondary,
};
CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
const struct smp_operations bcm2836_smp_ops __initconst = {
.smp_boot_secondary = bcm2836_boot_secondary,
};
CPU_METHOD_OF_DECLARE(bcm_smp_bcm2836, "brcm,bcm2836-smp", &bcm2836_smp_ops);

10
arch/arm/mach-bcm/platsmp.h Normal file
View File

@ -0,0 +1,10 @@
/*
* Copyright (C) 2017 Stefan Wahren <stefan.wahren@i2se.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 version 2.
*
*/
extern const struct smp_operations bcm2836_smp_ops;

1
drivers/clk/bcm/clk-bcm2835-aux.c
View File

@ -14,7 +14,6 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clk/bcm2835.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <dt-bindings/clock/bcm2835-aux.h>

30
drivers/clk/bcm/clk-bcm2835.c
View File

@ -37,7 +37,6 @@
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk.h>
#include <linux/clk/bcm2835.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/module.h>
@ -416,35 +415,6 @@ static int bcm2835_debugfs_regset(struct bcm2835_cprman *cprman, u32 base,
return regdump ? 0 : -ENOMEM;
}
/*
* These are fixed clocks. They're probably not all root clocks and it may
* be possible to turn them on and off but until this is mapped out better
* it's the only way they can be used.
*/
void __init bcm2835_init_clocks(void)
{
struct clk_hw *hw;
int ret;
hw = clk_hw_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 126000000);
if (IS_ERR(hw))
pr_err("apb_pclk not registered\n");
hw = clk_hw_register_fixed_rate(NULL, "uart0_pclk", NULL, 0, 3000000);
if (IS_ERR(hw))
pr_err("uart0_pclk not registered\n");
ret = clk_hw_register_clkdev(hw, NULL, "20201000.uart");
if (ret)
pr_err("uart0_pclk alias not registered\n");
hw = clk_hw_register_fixed_rate(NULL, "uart1_pclk", NULL, 0, 125000000);
if (IS_ERR(hw))
pr_err("uart1_pclk not registered\n");
ret = clk_hw_register_clkdev(hw, NULL, "20215000.uart");
if (ret)
pr_err("uart1_pclk alias not registered\n");
}
struct bcm2835_pll_data {
const char *name;
u32 cm_ctrl_reg;

79
drivers/irqchip/irq-bcm2836.c
View File

@ -19,63 +19,10 @@
#include <linux/of_irq.h>
#include <linux/irqchip.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/irq-bcm2836.h>
#include <asm/exception.h>
#define LOCAL_CONTROL 0x000
#define LOCAL_PRESCALER 0x008
/*
* The low 2 bits identify the CPU that the GPU IRQ goes to, and the
* next 2 bits identify the CPU that the GPU FIQ goes to.
*/
#define LOCAL_GPU_ROUTING 0x00c
/* When setting bits 0-3, enables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_SET 0x010
/* When setting bits 0-3, disables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_CLR 0x014
/*
* The low 4 bits of this are the CPU's timer IRQ enables, and the
* next 4 bits are the CPU's timer FIQ enables (which override the IRQ
* bits).
*/
#define LOCAL_TIMER_INT_CONTROL0 0x040
/*
* The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
* the next 4 bits are the CPU's per-mailbox FIQ enables (which
* override the IRQ bits).
*/
#define LOCAL_MAILBOX_INT_CONTROL0 0x050
/*
* The CPU's interrupt status register. Bits are defined by the the
* LOCAL_IRQ_* bits below.
*/
#define LOCAL_IRQ_PENDING0 0x060
/* Same status bits as above, but for FIQ. */
#define LOCAL_FIQ_PENDING0 0x070
/*
* Mailbox write-to-set bits. There are 16 mailboxes, 4 per CPU, and
* these bits are organized by mailbox number and then CPU number. We
* use mailbox 0 for IPIs. The mailbox's interrupt is raised while
* any bit is set.
*/
#define LOCAL_MAILBOX0_SET0 0x080
#define LOCAL_MAILBOX3_SET0 0x08c
/* Mailbox write-to-clear bits. */
#define LOCAL_MAILBOX0_CLR0 0x0c0
#define LOCAL_MAILBOX3_CLR0 0x0cc
#define LOCAL_IRQ_CNTPSIRQ 0
#define LOCAL_IRQ_CNTPNSIRQ 1
#define LOCAL_IRQ_CNTHPIRQ 2
#define LOCAL_IRQ_CNTVIRQ 3
#define LOCAL_IRQ_MAILBOX0 4
#define LOCAL_IRQ_MAILBOX1 5
#define LOCAL_IRQ_MAILBOX2 6
#define LOCAL_IRQ_MAILBOX3 7
#define LOCAL_IRQ_GPU_FAST 8
#define LOCAL_IRQ_PMU_FAST 9
#define LAST_IRQ LOCAL_IRQ_PMU_FAST
struct bcm2836_arm_irqchip_intc {
struct irq_domain *domain;
void __iomem *base;
@ -215,24 +162,6 @@ static int bcm2836_cpu_dying(unsigned int cpu)
cpu);
return 0;
}
#ifdef CONFIG_ARM
static int __init bcm2836_smp_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
unsigned long secondary_startup_phys =
(unsigned long)virt_to_phys((void *)secondary_startup);
writel(secondary_startup_phys,
intc.base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
return 0;
}
static const struct smp_operations bcm2836_smp_ops __initconst = {
.smp_boot_secondary = bcm2836_smp_boot_secondary,
};
#endif
#endif
static const struct irq_domain_ops bcm2836_arm_irqchip_intc_ops = {
@ -249,10 +178,6 @@ bcm2836_arm_irqchip_smp_init(void)
bcm2836_cpu_dying);
set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);
#ifdef CONFIG_ARM
smp_set_ops(&bcm2836_smp_ops);
#endif
#endif
}

24
include/linux/clk/bcm2835.h
View File

@ -1,24 +0,0 @@
/*
* Copyright (C) 2010 Broadcom
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __LINUX_CLK_BCM2835_H_
#define __LINUX_CLK_BCM2835_H_
void __init bcm2835_init_clocks(void);
#endif

70
include/linux/irqchip/irq-bcm2836.h Normal file
View File

@ -0,0 +1,70 @@
/*
* Root interrupt controller for the BCM2836 (Raspberry Pi 2).
*
* Copyright 2015 Broadcom
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define LOCAL_CONTROL 0x000
#define LOCAL_PRESCALER 0x008
/*
* The low 2 bits identify the CPU that the GPU IRQ goes to, and the
* next 2 bits identify the CPU that the GPU FIQ goes to.
*/
#define LOCAL_GPU_ROUTING 0x00c
/* When setting bits 0-3, enables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_SET 0x010
/* When setting bits 0-3, disables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_CLR 0x014
/*
* The low 4 bits of this are the CPU's timer IRQ enables, and the
* next 4 bits are the CPU's timer FIQ enables (which override the IRQ
* bits).
*/
#define LOCAL_TIMER_INT_CONTROL0 0x040
/*
* The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
* the next 4 bits are the CPU's per-mailbox FIQ enables (which
* override the IRQ bits).
*/
#define LOCAL_MAILBOX_INT_CONTROL0 0x050
/*
* The CPU's interrupt status register. Bits are defined by the the
* LOCAL_IRQ_* bits below.
*/
#define LOCAL_IRQ_PENDING0 0x060
/* Same status bits as above, but for FIQ. */
#define LOCAL_FIQ_PENDING0 0x070
/*
* Mailbox write-to-set bits. There are 16 mailboxes, 4 per CPU, and
* these bits are organized by mailbox number and then CPU number. We
* use mailbox 0 for IPIs. The mailbox's interrupt is raised while
* any bit is set.
*/
#define LOCAL_MAILBOX0_SET0 0x080
#define LOCAL_MAILBOX3_SET0 0x08c
/* Mailbox write-to-clear bits. */
#define LOCAL_MAILBOX0_CLR0 0x0c0
#define LOCAL_MAILBOX3_CLR0 0x0cc
#define LOCAL_IRQ_CNTPSIRQ 0
#define LOCAL_IRQ_CNTPNSIRQ 1
#define LOCAL_IRQ_CNTHPIRQ 2
#define LOCAL_IRQ_CNTVIRQ 3
#define LOCAL_IRQ_MAILBOX0 4
#define LOCAL_IRQ_MAILBOX1 5
#define LOCAL_IRQ_MAILBOX2 6
#define LOCAL_IRQ_MAILBOX3 7
#define LOCAL_IRQ_GPU_FAST 8
#define LOCAL_IRQ_PMU_FAST 9
#define LAST_IRQ LOCAL_IRQ_PMU_FAST