Subject: [PATCH v2 2/3] soc: dove: add legacy support to PMU driver

From: [email-masked] (Gregory CLEMENT)
Date: Mon, 07 Dec 2015 22:09:27 +0100

Hi Russell,
 
 On lun., d?c. 07 2015, Gregory CLEMENT <[email-masked]> wrote:

>  On lun., d?c. 07 2015, Gregory CLEMENT <[email-masked]> wrote:
>
>> Hi Russell,
>>  
>>  On lun., d?c. 07 2015, Russell King <[email-masked]> wrote:
>>
>>> Add support for legacy non-DT Dove to the PMU driver, so that we can
>>> transition the legacy support over.
>>>
>>> Signed-off-by: Russell King <[email-masked]>
>>
>> Applied on mvebu/soc (and fixed a conflict in drivers/soc/Makefile)
>
> Eventually I applied it on mvebu/drivers rather than mvebu/soc

Actually I was too optimitic. It doesn't build on mvebu/soc (based on
4.4-rc1).

First pm_genpd_poweroff_unused() had been removed since bb4b72fc63d4 "PM
/ Domains: Remove pm_genpd_poweroff_unused() API ".

Then, even by removing the call this function to go furthetr I got other
errors such as: drivers/soc/dove/pmu.c:344:46: error:
?IRQ_DOVE_PMU_START? undeclared (first use in this function)

Gregory

>
>>
>> Thanks,
>>
>> Gregory
>>
>>> ---
>>> This is a re-post of a previous patch, except I've split it into two to
>>> make the eventual removal of legacy Dove easier, as I believe Arnd will
>>> have some patches which touch legacy Dove which will conflict.  This
>>> makes it possible to revert this when the legacy Dove code is removed.
>>>
>>>  drivers/soc/Makefile         |  1 +
>>>  drivers/soc/dove/pmu.c       | 43 +++++++++++++++++++++++++++++++++++++++++++
>>>  include/linux/soc/dove/pmu.h | 18 ++++++++++++++++++
>>>  3 files changed, 62 insertions(+)
>>>
>>> diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
>>> index 0b12d777d3c4..c99192f30679 100644
>>> --- a/drivers/soc/Makefile
>>> +++ b/drivers/soc/Makefile
>>> @@ -2,6 +2,7 @@
>>>  # Makefile for the Linux Kernel SOC specific device drivers.
>>>  #
>>>  
>>> +obj-$(CONFIG_ARCH_DOVE)		+= dove/
>>>  obj-$(CONFIG_MACH_DOVE)		+= dove/
>>>  obj-$(CONFIG_ARCH_MEDIATEK)	+= mediatek/
>>>  obj-$(CONFIG_ARCH_QCOM)		+= qcom/
>>> diff --git a/drivers/soc/dove/pmu.c b/drivers/soc/dove/pmu.c
>>> index 052aecf29893..429e32cab55a 100644
>>> --- a/drivers/soc/dove/pmu.c
>>> +++ b/drivers/soc/dove/pmu.c
>>> @@ -305,6 +305,49 @@ static int __init dove_init_pmu_irq(struct pmu_data *pmu, int irq)
>>>  	return 0;
>>>  }
>>>  
>>> +int __init dove_init_pmu_legacy(const struct dove_pmu_initdata *initdata)
>>> +{
>>> +	const struct dove_pmu_domain_initdata *domain_initdata;
>>> +	struct pmu_data *pmu;
>>> +	int ret;
>>> +
>>> +	pmu = kzalloc(sizeof(*pmu), GFP_KERNEL);
>>> +	if (!pmu)
>>> +		return -ENOMEM;
>>> +
>>> +	spin_lock_init(&pmu->lock);
>>> +	pmu->pmc_base = initdata->pmc_base;
>>> +	pmu->pmu_base = initdata->pmu_base;
>>> +
>>> +	pmu_reset_init(pmu);
>>> +	for (domain_initdata = initdata->domains; domain_initdata->name;
>>> +	     domain_initdata++) {
>>> +		struct pmu_domain *domain;
>>> +
>>> +		domain = kzalloc(sizeof(*domain), GFP_KERNEL);
>>> +		if (domain) {
>>> +			domain->pmu = pmu;
>>> +			domain->pwr_mask = domain_initdata->pwr_mask;
>>> +			domain->rst_mask = domain_initdata->rst_mask;
>>> +			domain->iso_mask = domain_initdata->iso_mask;
>>> +			domain->base.name = domain_initdata->name;
>>> +
>>> +			__pmu_domain_register(domain, NULL);
>>> +		}
>>> +	}
>>> +	pm_genpd_poweroff_unused();
>>> +
>>> +	ret = dove_init_pmu_irq(pmu, initdata->irq);
>>> +	if (ret)
>>> +		pr_err("dove_init_pmu_irq() failed: %d\n", ret);
>>> +
>>> +	if (pmu->irq_domain)
>>> +		irq_domain_associate_many(pmu->irq_domain, IRQ_DOVE_PMU_START,
>>> +					  0, NR_PMU_IRQS);
>>> +
>>> +	return 0;
>>> +}
>>> +
>>>  /*
>>>   * pmu: power-manager at d0000 {
>>>   *	compatible = "marvell,dove-pmu";
>>> diff --git a/include/linux/soc/dove/pmu.h b/include/linux/soc/dove/pmu.h
>>> index 9c99f84bcc0e..431dfac595e7 100644
>>> --- a/include/linux/soc/dove/pmu.h
>>> +++ b/include/linux/soc/dove/pmu.h
>>> @@ -1,6 +1,24 @@
>>>  #ifndef LINUX_SOC_DOVE_PMU_H
>>>  #define LINUX_SOC_DOVE_PMU_H
>>>  
>>> +#include <linux/types.h>
>>> +
>>> +struct dove_pmu_domain_initdata {
>>> +	u32 pwr_mask;
>>> +	u32 rst_mask;
>>> +	u32 iso_mask;
>>> +	const char *name;
>>> +};
>>> +
>>> +struct dove_pmu_initdata {
>>> +	void __iomem *pmc_base;
>>> +	void __iomem *pmu_base;
>>> +	int irq;
>>> +	const struct dove_pmu_domain_initdata *domains;
>>> +};
>>> +
>>> +int dove_init_pmu_legacy(const struct dove_pmu_initdata *);
>>> +
>>>  int dove_init_pmu(void);
>>>  
>>>  #endif
>>> -- 
>>> 2.1.0
>>>
>>
>> -- 
>> Gregory Clement, Free Electrons
>> Kernel, drivers, real-time and embedded Linux
>> development, consulting, training and support.
>> http://free-electrons.com
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> -- 
> Gregory Clement, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com