From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752528AbbFAIiu (ORCPT ); Mon, 1 Jun 2015 04:38:50 -0400 Received: from mail-wg0-f42.google.com ([74.125.82.42]:35429 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751754AbbFAIik (ORCPT ); Mon, 1 Jun 2015 04:38:40 -0400 Date: Mon, 1 Jun 2015 09:38:35 +0100 From: Lee Jones To: Vaibhav Hiremath Cc: linux-arm-kernel@lists.infradead.org, robh+dt@kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, rtc-linux@googlegroups.com, sameo@linux.intel.com, a.zummo@towertech.it, alexandre.belloni@free-electrons.com, Chao Xie Subject: Re: [PATCH 1/4] mfd: 88pm800: add device tree support Message-ID: <20150601083835.GE3329@x1> References: <1432937962-4537-1-git-send-email-vaibhav.hiremath@linaro.org> <1432937962-4537-2-git-send-email-vaibhav.hiremath@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1432937962-4537-2-git-send-email-vaibhav.hiremath@linaro.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 30 May 2015, Vaibhav Hiremath wrote: > Add DT support to the 88pm800 driver along with below properties > - marvell,88pm800-irq-write-clear : > Idicates whether interrupt status is cleared by write > > Also, creates the DT binding text file, > Documentation/devicetree/bindings/mfd/88pm800.txt > > Signed-off-by: Chao Xie > Signed-off-by: Vaibhav Hiremath > --- > Documentation/devicetree/bindings/mfd/88pm800.txt | 57 +++++++++++++++++++++++ > drivers/mfd/88pm800.c | 39 ++++++++++++++++ These should be submitted separately. > 2 files changed, 96 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mfd/88pm800.txt > > diff --git a/Documentation/devicetree/bindings/mfd/88pm800.txt b/Documentation/devicetree/bindings/mfd/88pm800.txt > new file mode 100644 > index 0000000..094951b > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/88pm800.txt > @@ -0,0 +1,57 @@ > +* Marvell 88PM800 Power Management IC > + > +Required parent device properties: > +- compatible : "marvell,88pm800" > +- reg : the I2C slave address for the 88pm800 chip > +- interrupts : IRQ line for the 88pm800 chip > +- interrupt-controller: describes the 88pm800 as an interrupt controller > +- #interrupt-cells : should be 1. > + - The cell is the 88pm800 local IRQ number > + > +Optional parent device properties: > +- marvell,88pm800-irq-write-clr: indicates whether interrupt status is cleared by write Drop the device name. These bindings should be as generic as possible. Also describe what the absence of the property means. > +88pm800 consists of a large and varied group of sub-devices: 3? > +Device Supply Names Description > +------ ------------ ----------- > +88pm80x-onkey : : On key > +88pm80x-rtc : : RTC > +88pm80x : : Regulators Surely regulators is 88pm80x-regulator, no? > +Note: More device list will follow > + > +Example: > + > + pmic: 88pm800@30 { > + compatible = "marvell,88pm800"; > + reg = <0x30>; > + interrupts = <0 77 0x4>; Please use the #defines in include/dt-bindings/ > + interrupt-parent = <&gic>; > + interrupt-controller; > + #interrupt-cells = <1>; > + > + marvell,88pm800-irq-write-clr; > + > + regulators { > + compatible = "marvell,88pm80x-regulator"; > + > + buck1a: BUCK1A { > + regulator-compatible = "88PM800-BUCK1A"; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <1800000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + ldo1: LDO1 { > + regulator-compatible = "88PM800-LDO1"; > + regulator-min-microvolt = <1700000>; > + regulator-max-microvolt = <3300000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + }; '\n' here. > + rtc { > + compatible = "marvell,88pm80x-rtc"; > + }; > + }; > diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c > index 841717a..06ee058 100644 > --- a/drivers/mfd/88pm800.c > +++ b/drivers/mfd/88pm800.c > @@ -27,6 +27,7 @@ > #include > #include > #include > +#include > > /* Interrupt Registers */ > #define PM800_INT_STATUS1 (0x05) > @@ -121,6 +122,11 @@ static const struct i2c_device_id pm80x_id_table[] = { > }; > MODULE_DEVICE_TABLE(i2c, pm80x_id_table); > > +static const struct of_device_id pm80x_of_match_table[] = { > + { .compatible = "marvell,88pm800", }, > + {}, > +}; > + > static struct resource rtc_resources[] = { > { > .name = "88pm80x-rtc", > @@ -133,6 +139,7 @@ static struct resource rtc_resources[] = { > static struct mfd_cell rtc_devs[] = { > { > .name = "88pm80x-rtc", > + .of_compatible = "marvell,88pm80x-rtc", > .num_resources = ARRAY_SIZE(rtc_resources), > .resources = &rtc_resources[0], > .id = -1, > @@ -151,6 +158,7 @@ static struct resource onkey_resources[] = { > static const struct mfd_cell onkey_devs[] = { > { > .name = "88pm80x-onkey", > + .of_compatible = "marvell,88pm80x-onkey", > .num_resources = 1, > .resources = &onkey_resources[0], > .id = -1, > @@ -160,6 +168,7 @@ static const struct mfd_cell onkey_devs[] = { > static const struct mfd_cell regulator_devs[] = { > { > .name = "88pm80x-regulator", > + .of_compatible = "marvell,88pm80x-regulator", > .id = -1, > }, > }; > @@ -538,14 +547,43 @@ out: > return ret; > } > > +static int pm800_probe_dt(struct device_node *np, > + struct device *dev, Do you even use dev? > + struct pm80x_platform_data *pdata) > +{ > + pdata->irq_mode = > + of_property_read_bool(np, "marvell,88pm800-irq-write-clear"); You write a new function for this? > + return 0; > +} > + > + Superfluous '\n'. > static int pm800_probe(struct i2c_client *client, > const struct i2c_device_id *id) > { > int ret = 0; > struct pm80x_chip *chip; > struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev); > + struct device_node *node = client->dev.of_node; It's more common to use 'np'. > struct pm80x_subchip *subchip; > > + if (!pdata && !node) { > + dev_err(&client->dev, > + "pm80x requires platform data or of_node\n"); > + return -EINVAL; > + } > + > + if (!pdata) { > + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); > + if (!pdata) { > + dev_err(&client->dev, "failed to allocaate memory\n"); > + return -ENOMEM; > + } > + ret = pm800_probe_dt(node, &client->dev, pdata); > + if (ret) > + return ret; > + } All this for a single attribute? Please simplify. > ret = pm80x_init(client); > if (ret) { > dev_err(&client->dev, "pm800_init fail\n"); > @@ -611,6 +649,7 @@ static struct i2c_driver pm800_driver = { > .name = "88PM800", > .owner = THIS_MODULE, > .pm = &pm80x_pm_ops, > + .of_match_table = pm80x_of_match_table, > }, > .probe = pm800_probe, > .remove = pm800_remove, -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog