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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=6XkhWTU/zHmW4L14lFNXuMuv9qUGydEYcbZsIYX6biY=; b=Yaejzhcv+WoZ0/MGPwSL+MtpRvIIYOZ4A7ZjL8edN90un5iBK+ZDjiATR6g++zn8my 9ogdLMFs1ij1AG/oB5wfEBANR+U9OqYf9isfPWYijFkpyBFF8ETj0Jd41Mi0F/r60ESf EB8QLER1LlNxdpk5UEc7auxA+XrUO5ZmnCSfmhJgPMFJb3asH5v+WG49Q9pYbUkXlQRJ pog9VqwLLaopqokTr5ucT/xvwhHV5M0AjzhRHtN4Um0IVceVlq7iiPFh1oXgx+Wc68AU J+CO/TdsnHbXTuQgfCj2j08tDwQlnWyH8UbK0EGeW4GATvnhF08jDuGtGdHnEglqXT5l tv/Q== X-Gm-Message-State: AOAM530b6iikzwurir4DSKmPJRgMbWZn+IsZO6DmH3RQlRhwd8pS+VU2 JKg167E/DdZbqHJPAsRbJHP4juDBHXx7/vKLkulnY2mxmWQ= X-Google-Smtp-Source: ABdhPJx5oEDWFtFJA3/8NpP0Dm6E8ExvfD0xUvTvrvaEiEyn8BYKgX2HGqXg7qu2fQQBXLOe5yCKFyMipnAldYfjZLw= X-Received: by 2002:a2e:9681:: with SMTP id q1mr7100900lji.2.1606643722023; Sun, 29 Nov 2020 01:55:22 -0800 (PST) MIME-Version: 1.0 References: <1606476138-31992-1-git-send-email-bongsu.jeon2@gmail.com> <20201128124920.GB6313@kozik-lap> In-Reply-To: <20201128124920.GB6313@kozik-lap> From: Bongsu Jeon Date: Sun, 29 Nov 2020 18:55:10 +0900 Message-ID: Subject: Re: [PATCH v2 net-next 3/3] nfc: s3fwrn5: extract the common phy blocks To: Krzysztof Kozlowski Cc: Krzysztof Opasiak , linux-nfc@lists.01.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Bongsu Jeon Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Nov 28, 2020 at 9:49 PM Krzysztof Kozlowski wrote: > > On Fri, Nov 27, 2020 at 08:22:18PM +0900, bongsu.jeon2@gmail.com wrote: > > From: Bongsu Jeon > > > > Extract the common phy blocks to reuse it. > > The UART module will use the common blocks. > > > > Signed-off-by: Bongsu Jeon > > --- > > Changes in v2: > > - remove the common function's definition in common header file. > > - make the common phy_common.c file to define the common function. > > - wrap the lines. > > - change the Header guard. > > - remove the unused common function. > > > > drivers/nfc/s3fwrn5/Makefile | 2 +- > > drivers/nfc/s3fwrn5/i2c.c | 114 +++++++++++++-------------------------- > > drivers/nfc/s3fwrn5/phy_common.c | 60 +++++++++++++++++++++ > > drivers/nfc/s3fwrn5/phy_common.h | 31 +++++++++++ > > 4 files changed, 129 insertions(+), 78 deletions(-) > > create mode 100644 drivers/nfc/s3fwrn5/phy_common.c > > create mode 100644 drivers/nfc/s3fwrn5/phy_common.h > > > > diff --git a/drivers/nfc/s3fwrn5/Makefile b/drivers/nfc/s3fwrn5/Makefile > > index d0ffa35..a5279c6 100644 > > --- a/drivers/nfc/s3fwrn5/Makefile > > +++ b/drivers/nfc/s3fwrn5/Makefile > > @@ -4,7 +4,7 @@ > > # > > > > s3fwrn5-objs = core.o firmware.o nci.o > > -s3fwrn5_i2c-objs = i2c.o > > +s3fwrn5_i2c-objs = i2c.o phy_common.o > > Thanks for the changes. > > Shouldn't this be part of s3fwrn5.ko? Otherwise you would duplicate the > objects in two modules. > Okay. It could be better to avoid the duplication. I will try to move phy_common.c to s3fwrn5.ko. > > > > obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5.o > > obj-$(CONFIG_NFC_S3FWRN5_I2C) += s3fwrn5_i2c.o > > diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c > > index 9a64eea..207f970 100644 > > --- a/drivers/nfc/s3fwrn5/i2c.c > > +++ b/drivers/nfc/s3fwrn5/i2c.c > > @@ -16,74 +16,30 @@ > > #include > > > > #include "s3fwrn5.h" > > +#include "phy_common.h" > > > > #define S3FWRN5_I2C_DRIVER_NAME "s3fwrn5_i2c" > > > > -#define S3FWRN5_EN_WAIT_TIME 20 > > - > > struct s3fwrn5_i2c_phy { > > + struct phy_common common; > > struct i2c_client *i2c_dev; > > - struct nci_dev *ndev; > > - > > - int gpio_en; > > - int gpio_fw_wake; > > - > > - struct mutex mutex; > > > > - enum s3fwrn5_mode mode; > > unsigned int irq_skip:1; > > }; > > > > -static void s3fwrn5_i2c_set_wake(void *phy_id, bool wake) > > -{ > > - struct s3fwrn5_i2c_phy *phy = phy_id; > > - > > - mutex_lock(&phy->mutex); > > - gpio_set_value(phy->gpio_fw_wake, wake); > > - msleep(S3FWRN5_EN_WAIT_TIME); > > - mutex_unlock(&phy->mutex); > > -} > > - > > static void s3fwrn5_i2c_set_mode(void *phy_id, enum s3fwrn5_mode mode) > > { > > struct s3fwrn5_i2c_phy *phy = phy_id; > > > > - mutex_lock(&phy->mutex); > > + mutex_lock(&phy->common.mutex); > > > > - if (phy->mode == mode) > > + if (s3fwrn5_phy_power_ctrl(&phy->common, mode) == false) > > goto out; > > > > - phy->mode = mode; > > - > > - gpio_set_value(phy->gpio_en, 1); > > - gpio_set_value(phy->gpio_fw_wake, 0); > > - if (mode == S3FWRN5_MODE_FW) > > - gpio_set_value(phy->gpio_fw_wake, 1); > > - > > - if (mode != S3FWRN5_MODE_COLD) { > > - msleep(S3FWRN5_EN_WAIT_TIME); > > - gpio_set_value(phy->gpio_en, 0); > > - msleep(S3FWRN5_EN_WAIT_TIME); > > - } > > - > > phy->irq_skip = true; > > > > out: > > - mutex_unlock(&phy->mutex); > > -} > > - > > -static enum s3fwrn5_mode s3fwrn5_i2c_get_mode(void *phy_id) > > -{ > > - struct s3fwrn5_i2c_phy *phy = phy_id; > > - enum s3fwrn5_mode mode; > > - > > - mutex_lock(&phy->mutex); > > - > > - mode = phy->mode; > > - > > - mutex_unlock(&phy->mutex); > > - > > - return mode; > > + mutex_unlock(&phy->common.mutex); > > } > > > > static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) > > @@ -91,7 +47,7 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) > > struct s3fwrn5_i2c_phy *phy = phy_id; > > int ret; > > > > - mutex_lock(&phy->mutex); > > + mutex_lock(&phy->common.mutex); > > > > phy->irq_skip = false; > > > > @@ -102,7 +58,7 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) > > ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len); > > } > > > > - mutex_unlock(&phy->mutex); > > + mutex_unlock(&phy->common.mutex); > > > > if (ret < 0) > > return ret; > > @@ -114,9 +70,9 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) > > } > > > > static const struct s3fwrn5_phy_ops i2c_phy_ops = { > > - .set_wake = s3fwrn5_i2c_set_wake, > > + .set_wake = s3fwrn5_phy_set_wake, > > .set_mode = s3fwrn5_i2c_set_mode, > > - .get_mode = s3fwrn5_i2c_get_mode, > > + .get_mode = s3fwrn5_phy_get_mode, > > .write = s3fwrn5_i2c_write, > > }; > > > > @@ -128,7 +84,7 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) > > char hdr[4]; > > int ret; > > > > - hdr_size = (phy->mode == S3FWRN5_MODE_NCI) ? > > + hdr_size = (phy->common.mode == S3FWRN5_MODE_NCI) ? > > NCI_CTRL_HDR_SIZE : S3FWRN5_FW_HDR_SIZE; > > ret = i2c_master_recv(phy->i2c_dev, hdr, hdr_size); > > if (ret < 0) > > @@ -137,7 +93,7 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) > > if (ret < hdr_size) > > return -EBADMSG; > > > > - data_len = (phy->mode == S3FWRN5_MODE_NCI) ? > > + data_len = (phy->common.mode == S3FWRN5_MODE_NCI) ? > > ((struct nci_ctrl_hdr *)hdr)->plen : > > ((struct s3fwrn5_fw_header *)hdr)->len; > > > > @@ -157,24 +113,24 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) > > } > > > > out: > > - return s3fwrn5_recv_frame(phy->ndev, skb, phy->mode); > > + return s3fwrn5_recv_frame(phy->common.ndev, skb, phy->common.mode); > > } > > > > static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) > > { > > struct s3fwrn5_i2c_phy *phy = phy_id; > > > > - if (!phy || !phy->ndev) { > > + if (!phy || !phy->common.ndev) { > > WARN_ON_ONCE(1); > > return IRQ_NONE; > > } > > > > - mutex_lock(&phy->mutex); > > + mutex_lock(&phy->common.mutex); > > > > if (phy->irq_skip) > > goto out; > > > > - switch (phy->mode) { > > + switch (phy->common.mode) { > > case S3FWRN5_MODE_NCI: > > case S3FWRN5_MODE_FW: > > s3fwrn5_i2c_read(phy); > > @@ -184,7 +140,7 @@ static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) > > } > > > > out: > > - mutex_unlock(&phy->mutex); > > + mutex_unlock(&phy->common.mutex); > > > > return IRQ_HANDLED; > > } > > @@ -197,19 +153,21 @@ static int s3fwrn5_i2c_parse_dt(struct i2c_client *client) > > if (!np) > > return -ENODEV; > > > > - phy->gpio_en = of_get_named_gpio(np, "en-gpios", 0); > > - if (!gpio_is_valid(phy->gpio_en)) { > > + phy->common.gpio_en = of_get_named_gpio(np, "en-gpios", 0); > > + if (!gpio_is_valid(phy->common.gpio_en)) { > > /* Support also deprecated property */ > > - phy->gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); > > - if (!gpio_is_valid(phy->gpio_en)) > > + phy->common.gpio_en = > > + of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); > > This is not a proper wrapping. Wrapping happens on function arguments. > > > + if (!gpio_is_valid(phy->common.gpio_en)) > > return -ENODEV; > > } > > > > - phy->gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); > > - if (!gpio_is_valid(phy->gpio_fw_wake)) { > > + phy->common.gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); > > + if (!gpio_is_valid(phy->common.gpio_fw_wake)) { > > /* Support also deprecated property */ > > - phy->gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); > > - if (!gpio_is_valid(phy->gpio_fw_wake)) > > + phy->common.gpio_fw_wake = > > + of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); > > + if (!gpio_is_valid(phy->common.gpio_fw_wake)) > > The same. > Even though I wrapped this as below, Second line("s3fwrn5,fw-gpios" ) was over 80 columns. Is it okay as below? phy->gpio_fw_wake =of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); > > return -ENODEV; > > } > > > > @@ -226,8 +184,8 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, > > if (!phy) > > return -ENOMEM; > > > > - mutex_init(&phy->mutex); > > - phy->mode = S3FWRN5_MODE_COLD; > > + mutex_init(&phy->common.mutex); > > + phy->common.mode = S3FWRN5_MODE_COLD; > > phy->irq_skip = true; > > > > phy->i2c_dev = client; > > @@ -237,17 +195,19 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, > > if (ret < 0) > > return ret; > > > > - ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_en, > > - GPIOF_OUT_INIT_HIGH, "s3fwrn5_en"); > > + ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->common.gpio_en, > > + GPIOF_OUT_INIT_HIGH, "s3fwrn5_en"); > > if (ret < 0) > > return ret; > > > > - ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_fw_wake, > > - GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake"); > > + ret = devm_gpio_request_one(&phy->i2c_dev->dev, > > + phy->common.gpio_fw_wake, > > + GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake"); > > if (ret < 0) > > return ret; > > > > - ret = s3fwrn5_probe(&phy->ndev, phy, &phy->i2c_dev->dev, &i2c_phy_ops); > > + ret = s3fwrn5_probe(&phy->common.ndev, phy, &phy->i2c_dev->dev, > > + &i2c_phy_ops); > > if (ret < 0) > > return ret; > > > > @@ -255,7 +215,7 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, > > s3fwrn5_i2c_irq_thread_fn, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, > > S3FWRN5_I2C_DRIVER_NAME, phy); > > if (ret) > > - s3fwrn5_remove(phy->ndev); > > + s3fwrn5_remove(phy->common.ndev); > > > > return ret; > > } > > @@ -264,7 +224,7 @@ static int s3fwrn5_i2c_remove(struct i2c_client *client) > > { > > struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client); > > > > - s3fwrn5_remove(phy->ndev); > > + s3fwrn5_remove(phy->common.ndev); > > > > return 0; > > } > > diff --git a/drivers/nfc/s3fwrn5/phy_common.c b/drivers/nfc/s3fwrn5/phy_common.c > > new file mode 100644 > > index 0000000..e333764 > > --- /dev/null > > +++ b/drivers/nfc/s3fwrn5/phy_common.c > > @@ -0,0 +1,60 @@ > > +// SPDX-License-Identifier: GPL-2.0-or-later > > +/* > > + * Link Layer for Samsung S3FWRN5 NCI based Driver > > + * > > + * Copyright (C) 2015 Samsung Electrnoics > > + * Robert Baldyga > > + * Copyright (C) 2020 Samsung Electrnoics > > + * Bongsu Jeon > > + */ > > + > > +#include > > +#include > > You need also mutex.h (it seems original code did not have it but since > you move things around it's a new code basically). > > > + > > +#include "s3fwrn5.h" > > +#include "phy_common.h" > > + > > +void s3fwrn5_phy_set_wake(void *phy_id, bool wake) > > +{ > > + struct phy_common *phy = phy_id; > > + > > + mutex_lock(&phy->mutex); > > + gpio_set_value(phy->gpio_fw_wake, wake); > > + msleep(S3FWRN5_EN_WAIT_TIME); > > + mutex_unlock(&phy->mutex); > > +} > > + > > +bool s3fwrn5_phy_power_ctrl(struct phy_common *phy, enum s3fwrn5_mode mode) > > +{ > > + if (phy->mode == mode) > > + return false; > > + > > + phy->mode = mode; > > + > > + gpio_set_value(phy->gpio_en, 1); > > + gpio_set_value(phy->gpio_fw_wake, 0); > > + if (mode == S3FWRN5_MODE_FW) > > + gpio_set_value(phy->gpio_fw_wake, 1); > > + > > + if (mode != S3FWRN5_MODE_COLD) { > > + msleep(S3FWRN5_EN_WAIT_TIME); > > + gpio_set_value(phy->gpio_en, 0); > > + msleep(S3FWRN5_EN_WAIT_TIME); > > + } > > + > > + return true; > > +} > > + > > +enum s3fwrn5_mode s3fwrn5_phy_get_mode(void *phy_id) > > +{ > > + struct phy_common *phy = phy_id; > > + enum s3fwrn5_mode mode; > > + > > + mutex_lock(&phy->mutex); > > + > > + mode = phy->mode; > > + > > + mutex_unlock(&phy->mutex); > > + > > + return mode; > > +} > > diff --git a/drivers/nfc/s3fwrn5/phy_common.h b/drivers/nfc/s3fwrn5/phy_common.h > > new file mode 100644 > > index 0000000..b920f7f > > --- /dev/null > > +++ b/drivers/nfc/s3fwrn5/phy_common.h > > @@ -0,0 +1,31 @@ > > +/* SPDX-License-Identifier: GPL-2.0-or-later > > + * > > + * Link Layer for Samsung S3FWRN5 NCI based Driver > > + * > > + * Copyright (C) 2015 Samsung Electrnoics > > + * Robert Baldyga > > + * Copyright (C) 2020 Samsung Electrnoics > > + * Bongsu Jeon > > + */ > > + > > +#ifndef __NFC_S3FWRN5_PHY_COMMON_H > > +#define __NFC_S3FWRN5_PHY_COMMON_H > > + > > +#define S3FWRN5_EN_WAIT_TIME 20 > > + > > +struct phy_common { > > + struct nci_dev *ndev; > > You need a header for nci_dev type. > > > + > > + int gpio_en; > > + int gpio_fw_wake; > > + > > + struct mutex mutex; > > You need a header include for mutex. > > > + > > + enum s3fwrn5_mode mode; > > Indeed now it won't work - you use an enum without its declaration. The > s3fwrn5_mode enum looks more like a property of the phy and after this > patch would be used only once in i2c.c and once in core.c. > Yes. phy_common.h doesn't include nci_dev and mutex and s3fwrn5_mode declaration. So, i2c.c and phy_common.c include "s3fwrn5.h" first and then " ( mutex and nci_dev would be included from nci_core.h and 3fwrn5_mode would be included from s3fwrn5.h). > How is it going to be used in your new driver - I cannot check because > you did not post it. You should post this refactoring with new users of > the API, so we could see bigger picture. > Okay. Then, I will add the UART driver. So, I will resend the patches as below. 1. [PATCH net-next 1/4] dt-bindings: net: nfc: s3fwrn5: Support a UART interface 2. [PATCH net-next 2/4] nfc: s3fwrn5: reduce the EN_WAIT_TIME (* because of Jakub's request ) 3. [PATCH net-next 3/4] nfc: s3fwrn5: extract the common phy blocks 4. [PATCH net-next 4/4] net: nfc: s3fwrn5: Support a UART interface > Your original idea - with the s3fwrn5.h include here - looks more > logical than moving the enum s3fwrn5_mode here. > Do you mean that it would be better to include the s3fwrn5.h in phy_common.h? > Best regards, > Krzysztof