linux-kernel - Re: [PATCH v2 2/5] mfd: sec: Add support for S2MPS15 PMIC

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Date:	Mon, 26 Oct 2015 14:29:30 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Alim Akhtar <alim.akhtar@...sung.com>
Cc:	broonie@...nel.org, k.kozlowski@...sung.com,
	mturquette@...libre.com, linux-samsung-soc@...r.kernel.org,
	linux-clk@...r.kernel.org, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org,
	Thomas Abraham <thomas.ab@...sung.com>
Subject: Re: [PATCH v2 2/5] mfd: sec: Add support for S2MPS15 PMIC

On Mon, 26 Oct 2015, Alim Akhtar wrote:

> Hi Lee,
> Thanks for looking into this.
> 
> On 10/26/2015 04:36 PM, Lee Jones wrote:
> >On Mon, 26 Oct 2015, Alim Akhtar wrote:
> >
> >>From: Thomas Abraham <thomas.ab@...sung.com>
> >>
> >>Add support for S2MPS15 PMIC which is similar to S2MPS11 PMIC. The S2MPS15
> >>PMIC supports 27 LDO regulators, 10 buck regulators, RTC, three 32.768KHz
> >>clock outputs and battery charger. This patch adds initial support for
> >>LDO and buck regulators of S2MPS15 device.
> >>
> >>Signed-off-by: Thomas Abraham <thomas.ab@...sung.com>
> >>Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
> >>[Alim: Added s2mps15_devs like rtc and clk and related changes]
> >>Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> >>---
> >>  drivers/mfd/sec-core.c              |   31 +++++++
> >>  drivers/mfd/sec-irq.c               |    8 ++
> >>  include/linux/mfd/samsung/core.h    |    1 +
> >>  include/linux/mfd/samsung/s2mps15.h |  161 +++++++++++++++++++++++++++++++++++
> >>  4 files changed, 201 insertions(+)
> >>  create mode 100644 include/linux/mfd/samsung/s2mps15.h
> >>
> >>diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> >>index 2626fc0b5b8c..db3d4d4ff805 100644
> >>--- a/drivers/mfd/sec-core.c
> >>+++ b/drivers/mfd/sec-core.c
> >>@@ -29,6 +29,7 @@
> >>  #include <linux/mfd/samsung/s2mps11.h>
> >>  #include <linux/mfd/samsung/s2mps13.h>
> >>  #include <linux/mfd/samsung/s2mps14.h>
> >>+#include <linux/mfd/samsung/s2mps15.h>
> >>  #include <linux/mfd/samsung/s2mpu02.h>
> >>  #include <linux/mfd/samsung/s5m8763.h>
> >>  #include <linux/mfd/samsung/s5m8767.h>
> >>@@ -96,6 +97,17 @@ static const struct mfd_cell s2mps14_devs[] = {
> >>  	}
> >>  };
> >>
> >>+static const struct mfd_cell s2mps15_devs[] = {
> >>+	{
> >>+		.name = "s2mps15-pmic",
> >>+	}, {
> >>+		.name = "s2mps15-rtc",
> >>+	}, {
> >
> >Why don't these have compatibles?
> >
> s2mps15-pmic does have compatible below in sec_dt_match[].

Woah!!  What's going on here?  You're matching the MFD and Regulator
drivers with the same compatible string.  And then registering the
Regulator device as an MFD.  That's a bit confusing don't you think?

> s2mps15-rtc does not need one as rtc driver does not support OF yet.
> So no DT node for this as of now.

[...]

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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