From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: Re: [PATCH v4 1/3] mfd: wm831x: Add basic device tree binding Date: Thu, 16 Mar 2017 14:00:19 +0000 Message-ID: <20170316140019.eoe757vox5wrlkmu@dell> References: <1489592384-11510-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <1489592384-11510-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org To: Charles Keepax Cc: robh+dt@kernel.org, mark.rutland@arm.com, linus.walleij@linaro.org, gnurou@gmail.com, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, patches@opensource.wolfsonmicro.com List-Id: linux-gpio@vger.kernel.org On Wed, 15 Mar 2017, Charles Keepax wrote: > Add the basic ability to register the device through device tree, more > work is needed to get each individual sub-driver functioning correctly > but this is enough to get the device to probe from device tree. > > Signed-off-by: Charles Keepax > --- > > Changes since v3: > - No longer check return of of_match_device it should always match > - Move calls of of_match_device from helper function in wm831x-core > into both wm831x-i2c and wm831x-spi > - Move copy of pdata from wm831x-core into both wm831x-i2c and wm831x-spi > - Put device type into struct wm831x and remove the argument to that > effect passed to wm831x_device_init > > Thanks, > Charles > > drivers/mfd/wm831x-core.c | 29 +++++++++++++++++++++-------- > drivers/mfd/wm831x-i2c.c | 21 ++++++++++++++++++++- > drivers/mfd/wm831x-irq.c | 6 +++--- > drivers/mfd/wm831x-spi.c | 20 ++++++++++++++++++-- > include/linux/mfd/wm831x/core.h | 9 ++++++++- > 5 files changed, 70 insertions(+), 15 deletions(-) > > diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c > index 3e0e99e..13a4c11 100644 > --- a/drivers/mfd/wm831x-core.c > +++ b/drivers/mfd/wm831x-core.c > @@ -19,6 +19,8 @@ > #include > #include > #include > +#include > +#include > > #include > #include > @@ -1613,12 +1615,24 @@ struct regmap_config wm831x_regmap_config = { > }; > EXPORT_SYMBOL_GPL(wm831x_regmap_config); > > +const struct of_device_id wm831x_of_match[] = { > + { .compatible = "wlf,wm8310", .data = (void *)WM8310 }, > + { .compatible = "wlf,wm8311", .data = (void *)WM8311 }, > + { .compatible = "wlf,wm8312", .data = (void *)WM8312 }, > + { .compatible = "wlf,wm8320", .data = (void *)WM8320 }, > + { .compatible = "wlf,wm8321", .data = (void *)WM8321 }, > + { .compatible = "wlf,wm8325", .data = (void *)WM8325 }, > + { .compatible = "wlf,wm8326", .data = (void *)WM8326 }, > + { }, > +}; > +EXPORT_SYMBOL_GPL(wm831x_of_match); > + > /* > * Instantiate the generic non-control parts of the device. > */ > -int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) > +int wm831x_device_init(struct wm831x *wm831x, int irq) > { > - struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); > + struct wm831x_pdata *pdata = &wm831x->pdata; > int rev, wm831x_num; > enum wm831x_parent parent; > int ret, i; > @@ -1627,8 +1641,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) > mutex_init(&wm831x->key_lock); > dev_set_drvdata(wm831x->dev, wm831x); > > - if (pdata) > - wm831x->soft_shutdown = pdata->soft_shutdown; > + wm831x->soft_shutdown = pdata->soft_shutdown; > > ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID); > if (ret < 0) { > @@ -1663,7 +1676,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) > */ > if (ret == 0) { > dev_info(wm831x->dev, "Device is an engineering sample\n"); > - ret = id; > + ret = wm831x->type; > } > > switch (ret) { > @@ -1736,9 +1749,9 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) > /* This will need revisiting in future but is OK for all > * current parts. > */ > - if (parent != id) > - dev_warn(wm831x->dev, "Device was registered as a WM%lx\n", > - id); > + if (parent != wm831x->type) > + dev_warn(wm831x->dev, "Device was registered as a WM%x\n", > + wm831x->type); > > /* Bootstrap the user key */ > ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY); > diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c > index 824bcba..c442736 100644 > --- a/drivers/mfd/wm831x-i2c.c > +++ b/drivers/mfd/wm831x-i2c.c > @@ -19,6 +19,8 @@ > #include > #include > #include > +#include > +#include > #include > > #include > @@ -27,15 +29,28 @@ > static int wm831x_i2c_probe(struct i2c_client *i2c, > const struct i2c_device_id *id) > { > + struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev); > struct wm831x *wm831x; > + enum wm831x_parent type; > int ret; > > + if (i2c->dev.of_node) { > + const struct of_device_id *id = of_match_device(wm831x_of_match, > + &i2c->dev); Not keen on this. Please declare the variable up with the others. > + unsigned long of_type = (unsigned long)id->data; And this one. > + type = (enum wm831x_parent)of_type; Looks like you don't even need of_type. Just cast id->data straight into wm81x_parent. > + } else { > + type = (enum wm831x_parent)id->driver_data; > + } No need for bracketing here. > wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL); > if (wm831x == NULL) > return -ENOMEM; > > i2c_set_clientdata(i2c, wm831x); > wm831x->dev = &i2c->dev; > + wm831x->type = type; > > wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config); > if (IS_ERR(wm831x->regmap)) { > @@ -45,7 +60,10 @@ static int wm831x_i2c_probe(struct i2c_client *i2c, > return ret; > } > > - return wm831x_device_init(wm831x, id->driver_data, i2c->irq); > + if (pdata) > + memcpy(&wm831x->pdata, pdata, sizeof(*pdata)); > + > + return wm831x_device_init(wm831x, i2c->irq); > } > > static int wm831x_i2c_remove(struct i2c_client *i2c) > @@ -94,6 +112,7 @@ static struct i2c_driver wm831x_i2c_driver = { > .driver = { > .name = "wm831x", > .pm = &wm831x_pm_ops, > + .of_match_table = of_match_ptr(wm831x_of_match), > }, > .probe = wm831x_i2c_probe, > .remove = wm831x_i2c_remove, > diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c > index dfea8b9..c01239a 100644 > --- a/drivers/mfd/wm831x-irq.c > +++ b/drivers/mfd/wm831x-irq.c > @@ -564,7 +564,7 @@ static const struct irq_domain_ops wm831x_irq_domain_ops = { > > int wm831x_irq_init(struct wm831x *wm831x, int irq) > { > - struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); > + struct wm831x_pdata *pdata = &wm831x->pdata; > struct irq_domain *domain; > int i, ret, irq_base; > > @@ -579,7 +579,7 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq) > } > > /* Try to dynamically allocate IRQs if no base is specified */ > - if (pdata && pdata->irq_base) { > + if (pdata->irq_base) { > irq_base = irq_alloc_descs(pdata->irq_base, 0, > WM831X_NUM_IRQS, 0); > if (irq_base < 0) { > @@ -608,7 +608,7 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq) > return -EINVAL; > } > > - if (pdata && pdata->irq_cmos) > + if (pdata->irq_cmos) > i = 0; > else > i = WM831X_IRQ_OD; > diff --git a/drivers/mfd/wm831x-spi.c b/drivers/mfd/wm831x-spi.c > index 80482ae..c8e7007 100644 > --- a/drivers/mfd/wm831x-spi.c > +++ b/drivers/mfd/wm831x-spi.c > @@ -14,6 +14,8 @@ > > #include > #include > +#include > +#include > #include > #include > #include > @@ -23,12 +25,21 @@ > > static int wm831x_spi_probe(struct spi_device *spi) > { > + struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev); > const struct spi_device_id *id = spi_get_device_id(spi); > struct wm831x *wm831x; > enum wm831x_parent type; > int ret; > > - type = (enum wm831x_parent)id->driver_data; > + if (spi->dev.of_node) { > + const struct of_device_id *id = of_match_device(wm831x_of_match, > + &spi->dev); > + unsigned long of_type = (unsigned long)id->data; > + > + type = (enum wm831x_parent)of_type; > + } else { > + type = (enum wm831x_parent)id->driver_data; > + } As above. > wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL); > if (wm831x == NULL) > @@ -38,6 +49,7 @@ static int wm831x_spi_probe(struct spi_device *spi) > > spi_set_drvdata(spi, wm831x); > wm831x->dev = &spi->dev; > + wm831x->type = type; > > wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config); > if (IS_ERR(wm831x->regmap)) { > @@ -47,7 +59,10 @@ static int wm831x_spi_probe(struct spi_device *spi) > return ret; > } > > - return wm831x_device_init(wm831x, type, spi->irq); > + if (pdata) > + memcpy(&wm831x->pdata, pdata, sizeof(*pdata)); > + > + return wm831x_device_init(wm831x, spi->irq); > } > > static int wm831x_spi_remove(struct spi_device *spi) > @@ -97,6 +112,7 @@ static struct spi_driver wm831x_spi_driver = { > .driver = { > .name = "wm831x", > .pm = &wm831x_spi_pm, > + .of_match_table = of_match_ptr(wm831x_of_match), > }, > .id_table = wm831x_spi_ids, > .probe = wm831x_spi_probe, > diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h > index 76c2264..b49fa676 100644 > --- a/include/linux/mfd/wm831x/core.h > +++ b/include/linux/mfd/wm831x/core.h > @@ -21,6 +21,8 @@ > #include > #include > #include > +#include > +#include > > /* > * Register values. > @@ -367,6 +369,9 @@ struct wm831x { > > struct regmap *regmap; > > + struct wm831x_pdata pdata; > + enum wm831x_parent type; > + > int irq; /* Our chip IRQ */ > struct mutex irq_lock; > struct irq_domain *irq_domain; > @@ -412,7 +417,7 @@ int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg, > int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg, > int count, u16 *buf); > > -int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq); > +int wm831x_device_init(struct wm831x *wm831x, int irq); > void wm831x_device_exit(struct wm831x *wm831x); > int wm831x_device_suspend(struct wm831x *wm831x); > void wm831x_device_shutdown(struct wm831x *wm831x); > @@ -427,4 +432,6 @@ static inline int wm831x_irq(struct wm831x *wm831x, int irq) > > extern struct regmap_config wm831x_regmap_config; > > +extern const struct of_device_id wm831x_of_match[]; > + > #endif -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog