From 07d20a643084f5cc96370c2490a07a517877dc0a Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:12 +0200 Subject: [PATCH 1/8] dt-bindings: net: nfc: s3fwrn5: Convert to dtschema Convert the Samsung S3FWRN5 NCI NFC controller bindings to dtschema. This is conversion only so it includes properties with invalid prefixes (s3fwrn5,en-gpios) which should be addressed later. Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- .../devicetree/bindings/net/nfc/s3fwrn5.txt | 25 -------- .../bindings/net/nfc/samsung,s3fwrn5.yaml | 61 +++++++++++++++++++ MAINTAINERS | 1 + 3 files changed, 62 insertions(+), 25 deletions(-) delete mode 100644 Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt create mode 100644 Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml diff --git a/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt b/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt deleted file mode 100644 index f02f6fb7f81c..000000000000 --- a/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt +++ /dev/null @@ -1,25 +0,0 @@ -* Samsung S3FWRN5 NCI NFC Controller - -Required properties: -- compatible: Should be "samsung,s3fwrn5-i2c". -- reg: address on the bus -- interrupts: GPIO interrupt to which the chip is connected -- s3fwrn5,en-gpios: Output GPIO pin used for enabling/disabling the chip -- s3fwrn5,fw-gpios: Output GPIO pin used to enter firmware mode and - sleep/wakeup control - -Example: - -&hsi2c_4 { - s3fwrn5@27 { - compatible = "samsung,s3fwrn5-i2c"; - - reg = <0x27>; - - interrupt-parent = <&gpa1>; - interrupts = <3 0 0>; - - s3fwrn5,en-gpios = <&gpf1 4 0>; - s3fwrn5,fw-gpios = <&gpj0 2 0>; - }; -}; diff --git a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml new file mode 100644 index 000000000000..f43d31a2d94b --- /dev/null +++ b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml @@ -0,0 +1,61 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/nfc/samsung,s3fwrn5.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung S3FWRN5 NCI NFC Controller + +maintainers: + - Krzysztof Kozlowski + - Krzysztof Opasiak + +properties: + compatible: + const: samsung,s3fwrn5-i2c + + interrupts: + maxItems: 1 + + reg: + maxItems: 1 + + s3fwrn5,en-gpios: + maxItems: 1 + description: + Output GPIO pin used for enabling/disabling the chip + + s3fwrn5,fw-gpios: + maxItems: 1 + description: + Output GPIO pin used to enter firmware mode and sleep/wakeup control + +additionalProperties: false + +required: + - compatible + - interrupts + - reg + - s3fwrn5,en-gpios + - s3fwrn5,fw-gpios + +examples: + - | + #include + #include + + i2c4 { + #address-cells = <1>; + #size-cells = <0>; + + s3fwrn5@27 { + compatible = "samsung,s3fwrn5-i2c"; + reg = <0x27>; + + interrupt-parent = <&gpa1>; + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>; + + s3fwrn5,en-gpios = <&gpf1 4 GPIO_ACTIVE_HIGH>; + s3fwrn5,fw-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 9a545a631f0d..8a21d28cb878 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15296,6 +15296,7 @@ M: Robert Baldyga M: Krzysztof Opasiak L: linux-nfc@lists.01.org (moderated for non-subscribers) S: Supported +F: Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml F: drivers/nfc/s3fwrn5 SAMSUNG S5C73M3 CAMERA DRIVER From 3a9f89aaee2b42c1ad1bfef69dddf791f781812a Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:13 +0200 Subject: [PATCH 2/8] dt-bindings: net: nfc: s3fwrn5: Remove wrong vendor prefix from GPIOs The device tree property prefix describes the vendor, which in case of S3FWRN5 chip is Samsung. Therefore the "s3fwrn5" prefix for "en-gpios" and "fw-gpios" is not correct and should be deprecated. Introduce properly named properties for these GPIOs and rename the fw-gpios" to "wake-gpios" to better describe its purpose. Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- .../bindings/net/nfc/samsung,s3fwrn5.yaml | 24 ++++++++++++++----- 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml index f43d31a2d94b..cb0b8a560282 100644 --- a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml +++ b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml @@ -14,30 +14,42 @@ properties: compatible: const: samsung,s3fwrn5-i2c + en-gpios: + maxItems: 1 + description: + Output GPIO pin used for enabling/disabling the chip + interrupts: maxItems: 1 reg: maxItems: 1 + wake-gpios: + maxItems: 1 + description: + Output GPIO pin used to enter firmware mode and sleep/wakeup control + s3fwrn5,en-gpios: maxItems: 1 + deprecated: true description: - Output GPIO pin used for enabling/disabling the chip + Use en-gpios s3fwrn5,fw-gpios: maxItems: 1 + deprecated: true description: - Output GPIO pin used to enter firmware mode and sleep/wakeup control + Use wake-gpios additionalProperties: false required: - compatible + - en-gpios - interrupts - reg - - s3fwrn5,en-gpios - - s3fwrn5,fw-gpios + - wake-gpios examples: - | @@ -55,7 +67,7 @@ examples: interrupt-parent = <&gpa1>; interrupts = <3 IRQ_TYPE_LEVEL_HIGH>; - s3fwrn5,en-gpios = <&gpf1 4 GPIO_ACTIVE_HIGH>; - s3fwrn5,fw-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; + en-gpios = <&gpf1 4 GPIO_ACTIVE_HIGH>; + wake-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; }; }; From 1995c4cc3ae4070717b07d972e0ee66989375304 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:14 +0200 Subject: [PATCH 3/8] nfc: s3fwrn5: Remove wrong vendor prefix from GPIOs The device tree property prefix describes the vendor, which in case of S3FWRN5 chip is Samsung. Therefore the "s3fwrn5" prefix for "en-gpios" and "fw-gpios" is not correct and should be deprecated. Introduce properly named properties for these GPIOs but still support deprecated ones. Signed-off-by: Krzysztof Kozlowski Tested-by: Marek Szyprowski Signed-off-by: David S. Miller --- drivers/nfc/s3fwrn5/i2c.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c index b4eb926d220a..557279492503 100644 --- a/drivers/nfc/s3fwrn5/i2c.c +++ b/drivers/nfc/s3fwrn5/i2c.c @@ -200,13 +200,21 @@ static int s3fwrn5_i2c_parse_dt(struct i2c_client *client) if (!np) return -ENODEV; - phy->gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); - if (!gpio_is_valid(phy->gpio_en)) - return -ENODEV; + phy->gpio_en = of_get_named_gpio(np, "en-gpios", 0); + if (!gpio_is_valid(phy->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)) + return -ENODEV; + } - phy->gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); - if (!gpio_is_valid(phy->gpio_fw_wake)) - return -ENODEV; + phy->gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); + if (!gpio_is_valid(phy->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)) + return -ENODEV; + } return 0; } From e52e4130ffefaab11c7a09ab83de7022400d5d60 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:15 +0200 Subject: [PATCH 4/8] nfc: s3fwrn5: Remove unneeded 'ret' variable The local variable 'ret' can be removed: drivers/nfc/s3fwrn5/i2c.c:167:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- drivers/nfc/s3fwrn5/i2c.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c index 557279492503..dc995286be84 100644 --- a/drivers/nfc/s3fwrn5/i2c.c +++ b/drivers/nfc/s3fwrn5/i2c.c @@ -164,7 +164,6 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) { struct s3fwrn5_i2c_phy *phy = phy_id; - int ret = 0; if (!phy || !phy->ndev) { WARN_ON_ONCE(1); @@ -179,10 +178,9 @@ static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) switch (phy->mode) { case S3FWRN5_MODE_NCI: case S3FWRN5_MODE_FW: - ret = s3fwrn5_i2c_read(phy); + s3fwrn5_i2c_read(phy); break; case S3FWRN5_MODE_COLD: - ret = -EREMOTEIO; break; } From 4aa62c62d4c41d71b2bda5ed01b78961829ee93c Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:16 +0200 Subject: [PATCH 5/8] nfc: s3fwrn5: Add missing CRYPTO_HASH dependency The driver uses crypto hash functions so it needs to select CRYPTO_HASH. This fixes build errors: arc-linux-ld: drivers/nfc/s3fwrn5/firmware.o: in function `s3fwrn5_fw_download': firmware.c:(.text+0x152): undefined reference to `crypto_alloc_shash' Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- drivers/nfc/s3fwrn5/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/nfc/s3fwrn5/Kconfig b/drivers/nfc/s3fwrn5/Kconfig index af9d18690afe..3f8b6da58280 100644 --- a/drivers/nfc/s3fwrn5/Kconfig +++ b/drivers/nfc/s3fwrn5/Kconfig @@ -2,6 +2,7 @@ config NFC_S3FWRN5 tristate select CRYPTO + select CRYPTO_HASH help Core driver for Samsung S3FWRN5 NFC chip. Contains core utilities of chip. It's intended to be used by PHYs to avoid duplicating lots From 171a7000fa94c7ed30720357bc0b9e8d277d15e5 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:17 +0200 Subject: [PATCH 6/8] nfc: s3fwrn5: Constify s3fwrn5_fw_info when not modified Two functions accept pointer to struct s3fwrn5_fw_info but do not modify the contents. Make them const so the code is a little bit safer. Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- drivers/nfc/s3fwrn5/firmware.c | 4 ++-- drivers/nfc/s3fwrn5/firmware.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/nfc/s3fwrn5/firmware.c b/drivers/nfc/s3fwrn5/firmware.c index 69857f080704..ec930ee2c847 100644 --- a/drivers/nfc/s3fwrn5/firmware.c +++ b/drivers/nfc/s3fwrn5/firmware.c @@ -348,7 +348,7 @@ static int s3fwrn5_fw_get_base_addr( } static inline bool -s3fwrn5_fw_is_custom(struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) +s3fwrn5_fw_is_custom(const struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) { return !!bootinfo->hw_version[2]; } @@ -399,7 +399,7 @@ int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info) return ret; } -bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version) +bool s3fwrn5_fw_check_version(const struct s3fwrn5_fw_info *fw_info, u32 version) { struct s3fwrn5_fw_version *new = (void *) &fw_info->fw.version; struct s3fwrn5_fw_version *old = (void *) &version; diff --git a/drivers/nfc/s3fwrn5/firmware.h b/drivers/nfc/s3fwrn5/firmware.h index cf1a83a5a525..3c83e6730d30 100644 --- a/drivers/nfc/s3fwrn5/firmware.h +++ b/drivers/nfc/s3fwrn5/firmware.h @@ -91,7 +91,7 @@ struct s3fwrn5_fw_info { void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name); int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info); -bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version); +bool s3fwrn5_fw_check_version(const struct s3fwrn5_fw_info *fw_info, u32 version); int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info); void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info); From 46c9efa47fe004e461f7e2dd1f9fae4596254a69 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:18 +0200 Subject: [PATCH 7/8] MAINTAINERS: Add Krzysztof Kozlowski to Samsung S3FWRN5 and remove Robert MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Robert Bałdyga's email does not work (bounces) since 2016 so remove it. Additionally there are no review/ack/tested tags from Krzysztof Opasiak so it looks like the driver is not supported. As a maintainer of Samsung ARM/ARM64 SoC, I can take care about this driver and provide some review. However clearly driver is not in supported mode as I do not work in Samsung anymore. Signed-off-by: Krzysztof Kozlowski Signed-off-by: David S. Miller --- CREDITS | 4 ++++ MAINTAINERS | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/CREDITS b/CREDITS index 32ee70a7562e..1df63cdf71df 100644 --- a/CREDITS +++ b/CREDITS @@ -191,6 +191,10 @@ N: Krishna Balasubramanian E: balasub@cis.ohio-state.edu D: Wrote SYS V IPC (part of standard kernel since 0.99.10) +B: Robert Baldyga +E: r.baldyga@hackerion.com +D: Samsung S3FWRN5 NCI NFC Controller + N: Chris Ball E: chris@printf.net D: Former maintainer of the MMC/SD/SDIO subsystem. diff --git a/MAINTAINERS b/MAINTAINERS index 8a21d28cb878..c99577961cc4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15292,10 +15292,10 @@ F: drivers/media/platform/s3c-camif/ F: include/media/drv-intf/s3c_camif.h SAMSUNG S3FWRN5 NFC DRIVER -M: Robert Baldyga +M: Krzysztof Kozlowski M: Krzysztof Opasiak L: linux-nfc@lists.01.org (moderated for non-subscribers) -S: Supported +S: Maintained F: Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml F: drivers/nfc/s3fwrn5 From 0760aad038b5a032c31ea124feed63d88627d2f1 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 10 Sep 2020 18:12:19 +0200 Subject: [PATCH 8/8] arm64: dts: exynos: Use newer S3FWRN5 GPIO properties in Exynos5433 TM2 Since "s3fwrn5" is not a valid vendor prefix, use new GPIO properties instead of the deprecated. Signed-off-by: Krzysztof Kozlowski Tested-by: Marek Szyprowski Signed-off-by: David S. Miller --- arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi index 250fc01de78d..24aab3ea3f52 100644 --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi @@ -795,8 +795,8 @@ reg = <0x27>; interrupt-parent = <&gpa1>; interrupts = <3 IRQ_TYPE_LEVEL_HIGH>; - s3fwrn5,en-gpios = <&gpf1 4 GPIO_ACTIVE_HIGH>; - s3fwrn5,fw-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; + en-gpios = <&gpf1 4 GPIO_ACTIVE_HIGH>; + wake-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; }; };