* [PATCH 0/3] nvmem: add lpc18xx OTP memory driver @ 2016-09-13 16:12 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A, maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8 Cc: Joachim Eastwood, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA, robh+dt-DgEjT+Ai2ygdnm+yROfE0A This patch set adds a simple read-only nvmem driver for the internal OTP (One Time Programmable) memory found on all LPC18xx/43xx devices. Write support is coming later when the required firmware driver for the boot ROM goes upstream. Note that dtsi patch is only included for reference. I intend to take it myself through the lpc18xx tree once the bindings are accepted and the driver goes upstream. Joachim Eastwood (3): nvmem: add NXP LPC18xx OTP driver nvmem: dt: document lpc1850 OTP binding ARM: dts: lpc18xx: add otp node .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++ arch/arm/boot/dts/lpc18xx.dtsi | 12 ++ drivers/nvmem/Kconfig | 10 ++ drivers/nvmem/Makefile | 2 + drivers/nvmem/lpc18xx_otp.c | 123 +++++++++++++++++++++ 5 files changed, 167 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt create mode 100644 drivers/nvmem/lpc18xx_otp.c -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 0/3] nvmem: add lpc18xx OTP memory driver @ 2016-09-13 16:12 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: linux-arm-kernel This patch set adds a simple read-only nvmem driver for the internal OTP (One Time Programmable) memory found on all LPC18xx/43xx devices. Write support is coming later when the required firmware driver for the boot ROM goes upstream. Note that dtsi patch is only included for reference. I intend to take it myself through the lpc18xx tree once the bindings are accepted and the driver goes upstream. Joachim Eastwood (3): nvmem: add NXP LPC18xx OTP driver nvmem: dt: document lpc1850 OTP binding ARM: dts: lpc18xx: add otp node .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++ arch/arm/boot/dts/lpc18xx.dtsi | 12 ++ drivers/nvmem/Kconfig | 10 ++ drivers/nvmem/Makefile | 2 + drivers/nvmem/lpc18xx_otp.c | 123 +++++++++++++++++++++ 5 files changed, 167 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt create mode 100644 drivers/nvmem/lpc18xx_otp.c -- 2.9.3 ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver 2016-09-13 16:12 ` Joachim Eastwood (?) @ 2016-09-13 16:12 ` Joachim Eastwood 2016-09-19 10:56 ` Srinivas Kandagatla 2016-10-07 1:44 ` Vladimir Zapolskiy -1 siblings, 2 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: linux-arm-kernel Add simple read only driver for the internal OTP (One Time Programmable) memory found on all NXP LPC18xx and LPC43xx devices. The OTP memory is split into 4 banks each with 4 32-bits word. Some of the banks contain predefined data while others are for general purpose and user programmable via the OTP API in ROM. Note that writing to the OTP memory is not yet supported. Signed-off-by: Joachim Eastwood <manabian@gmail.com> --- drivers/nvmem/Kconfig | 10 ++++ drivers/nvmem/Makefile | 2 + drivers/nvmem/lpc18xx_otp.c | 123 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 135 insertions(+) create mode 100644 drivers/nvmem/lpc18xx_otp.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index f550c45..282037b 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -35,6 +35,16 @@ config NVMEM_LPC18XX_EEPROM To compile this driver as a module, choose M here: the module will be called nvmem_lpc18xx_eeprom. +config NVMEM_LPC18XX_OTP + tristate "NXP LPC18XX OTP Memory Support" + depends on ARCH_LPC18XX || COMPILE_TEST + depends on HAS_IOMEM + help + Say Y here to include support for NXP LPC18xx OTP memory found on + all LPC18xx and LPC43xx devices. + To compile this driver as a module, choose M here: the module + will be called nvmem_lpc18xx_otp. + config NVMEM_MXS_OCOTP tristate "Freescale MXS On-Chip OTP Memory Support" depends on ARCH_MXS || COMPILE_TEST diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 45ab1ae..df485a9 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -10,6 +10,8 @@ obj-$(CONFIG_NVMEM_IMX_OCOTP) += nvmem-imx-ocotp.o nvmem-imx-ocotp-y := imx-ocotp.o obj-$(CONFIG_NVMEM_LPC18XX_EEPROM) += nvmem_lpc18xx_eeprom.o nvmem_lpc18xx_eeprom-y := lpc18xx_eeprom.o +obj-$(CONFIG_NVMEM_LPC18XX_OTP) += nvmem_lpc18xx_otp.o +nvmem_lpc18xx_otp-y := lpc18xx_otp.o obj-$(CONFIG_NVMEM_MXS_OCOTP) += nvmem-mxs-ocotp.o nvmem-mxs-ocotp-y := mxs-ocotp.o obj-$(CONFIG_MTK_EFUSE) += nvmem_mtk-efuse.o diff --git a/drivers/nvmem/lpc18xx_otp.c b/drivers/nvmem/lpc18xx_otp.c new file mode 100644 index 0000000..b78ed0b --- /dev/null +++ b/drivers/nvmem/lpc18xx_otp.c @@ -0,0 +1,123 @@ +/* + * NXP LPC18xx/43xx OTP memory NVMEM driver + * + * Copyright (c) 2016 Joachim Eastwood <manabian@gmail.com> + * + * Based on the imx ocotp driver, + * Copyright (c) 2015 Pengutronix, Philipp Zabel <p.zabel@pengutronix.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * TODO: add support for writing OTP register via API in boot ROM. + */ + +#include <linux/io.h> +#include <linux/module.h> +#include <linux/nvmem-provider.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +/* + * LPC18xx OTP memory contains 4 banks with 4 32-bit words. Bank 0 starts + * at offset 0 from the base. + * + * Bank 0 contains the part ID for Flashless devices and is reseverd for + * devices with Flash. + * Bank 1/2 is generale purpose or AES key storage for secure devices. + * Bank 3 contains control data, USB ID and generale purpose words. + */ +#define LPC18XX_OTP_NUM_BANKS 4 +#define LPC18XX_OTP_WORDS_PER_BANK 4 +#define LPC18XX_OTP_WORD_SIZE sizeof(u32) +#define LPC18XX_OTP_SIZE (LPC18XX_OTP_NUM_BANKS * \ + LPC18XX_OTP_WORDS_PER_BANK * \ + LPC18XX_OTP_WORD_SIZE) + +struct lpc18xx_otp { + void __iomem *base; +}; + +static int lpc18xx_otp_read(void *context, unsigned int offset, + void *val, size_t bytes) +{ + struct lpc18xx_otp *otp = context; + unsigned int count = bytes >> 2; + u32 index = offset >> 2; + u32 *buf = val; + int i; + + if (count > (LPC18XX_OTP_SIZE - index)) + count = LPC18XX_OTP_SIZE - index; + + for (i = index; i < (index + count); i++) + *buf++ = readl(otp->base + i * LPC18XX_OTP_WORD_SIZE); + + return 0; +} + +static struct nvmem_config lpc18xx_otp_nvmem_config = { + .name = "lpc18xx-otp", + .read_only = true, + .word_size = LPC18XX_OTP_WORD_SIZE, + .stride = LPC18XX_OTP_WORD_SIZE, + .owner = THIS_MODULE, + .reg_read = lpc18xx_otp_read, +}; + +static int lpc18xx_otp_probe(struct platform_device *pdev) +{ + struct nvmem_device *nvmem; + struct lpc18xx_otp *otp; + struct resource *res; + + otp = devm_kzalloc(&pdev->dev, sizeof(*otp), GFP_KERNEL); + if (!otp) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + otp->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(otp->base)) + return PTR_ERR(otp->base); + + lpc18xx_otp_nvmem_config.size = LPC18XX_OTP_SIZE; + lpc18xx_otp_nvmem_config.dev = &pdev->dev; + lpc18xx_otp_nvmem_config.priv = otp; + + nvmem = nvmem_register(&lpc18xx_otp_nvmem_config); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + return 0; +} + +static int lpc18xx_otp_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + return nvmem_unregister(nvmem); +} + +static const struct of_device_id lpc18xx_otp_dt_ids[] = { + { .compatible = "nxp,lpc1850-otp" }, + { }, +}; +MODULE_DEVICE_TABLE(of, lpc18xx_otp_dt_ids); + +static struct platform_driver lpc18xx_otp_driver = { + .probe = lpc18xx_otp_probe, + .remove = lpc18xx_otp_remove, + .driver = { + .name = "lpc18xx_otp", + .of_match_table = lpc18xx_otp_dt_ids, + }, +}; +module_platform_driver(lpc18xx_otp_driver); + +MODULE_AUTHOR("Joachim Eastwoood <manabian@gmail.com>"); +MODULE_DESCRIPTION("NXP LPC18xx OTP NVMEM driver"); +MODULE_LICENSE("GPL v2"); -- 2.9.3 ^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver 2016-09-13 16:12 ` [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver Joachim Eastwood @ 2016-09-19 10:56 ` Srinivas Kandagatla 2016-10-07 1:44 ` Vladimir Zapolskiy 1 sibling, 0 replies; 14+ messages in thread From: Srinivas Kandagatla @ 2016-09-19 10:56 UTC (permalink / raw) To: linux-arm-kernel On 13/09/16 17:12, Joachim Eastwood wrote: > Add simple read only driver for the internal OTP (One Time Programmable) > memory found on all NXP LPC18xx and LPC43xx devices. > > The OTP memory is split into 4 banks each with 4 32-bits word. Some of > the banks contain predefined data while others are for general purpose > and user programmable via the OTP API in ROM. Note that writing to the > OTP memory is not yet supported. > > Signed-off-by: Joachim Eastwood <manabian@gmail.com> > --- > drivers/nvmem/Kconfig | 10 ++++ > drivers/nvmem/Makefile | 2 + > drivers/nvmem/lpc18xx_otp.c | 123 ++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 135 insertions(+) > create mode 100644 drivers/nvmem/lpc18xx_otp.c > Patch looks good to me. I will pick this patch + bindings patch once rc1 lands in. Thanks, srini ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver 2016-09-13 16:12 ` [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver Joachim Eastwood 2016-09-19 10:56 ` Srinivas Kandagatla @ 2016-10-07 1:44 ` Vladimir Zapolskiy 2016-10-08 10:26 ` Joachim Eastwood 1 sibling, 1 reply; 14+ messages in thread From: Vladimir Zapolskiy @ 2016-10-07 1:44 UTC (permalink / raw) To: linux-arm-kernel Hi Joachim, Srinivas, On 13.09.2016 19:12, Joachim Eastwood wrote: > Add simple read only driver for the internal OTP (One Time Programmable) > memory found on all NXP LPC18xx and LPC43xx devices. > > The OTP memory is split into 4 banks each with 4 32-bits word. Some of > the banks contain predefined data while others are for general purpose > and user programmable via the OTP API in ROM. Note that writing to the > OTP memory is not yet supported. > > Signed-off-by: Joachim Eastwood <manabian@gmail.com> > --- please feel free to add my Tested-by: Vladimir Zapolskiy <vz@mleia.com> -- With best wishes, Vladimir ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver 2016-10-07 1:44 ` Vladimir Zapolskiy @ 2016-10-08 10:26 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-10-08 10:26 UTC (permalink / raw) To: linux-arm-kernel Hi Vladimir, On 7 October 2016 at 03:44, Vladimir Zapolskiy <vz@mleia.com> wrote: > Hi Joachim, Srinivas, > > On 13.09.2016 19:12, Joachim Eastwood wrote: >> Add simple read only driver for the internal OTP (One Time Programmable) >> memory found on all NXP LPC18xx and LPC43xx devices. >> >> The OTP memory is split into 4 banks each with 4 32-bits word. Some of >> the banks contain predefined data while others are for general purpose >> and user programmable via the OTP API in ROM. Note that writing to the >> OTP memory is not yet supported. >> >> Signed-off-by: Joachim Eastwood <manabian@gmail.com> >> --- > > please feel free to add my > > Tested-by: Vladimir Zapolskiy <vz@mleia.com> Thanks for testing! regards, Joachim Eastwood ^ permalink raw reply [flat|nested] 14+ messages in thread
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* [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding 2016-09-13 16:12 ` Joachim Eastwood @ 2016-09-13 16:12 ` Joachim Eastwood -1 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A, maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8, robh+dt-DgEjT+Ai2ygdnm+yROfE0A Cc: Joachim Eastwood, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA Documenation for the LPC18xx/43xx OTP memory bindings. Signed-off-by: Joachim Eastwood <manabian-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> --- .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt new file mode 100644 index 0000000..853b6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt @@ -0,0 +1,20 @@ +* NXP LPC18xx OTP memory + +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. + +Required properties: + - compatible: Should be "nxp,lpc1850-otp" + - reg: Must contain an entry with the physical base address and length + for each entry in reg-names. + - address-cells: must be set to 1. + - size-cells: must be set to 1. + +See nvmem.txt for more information. + +Example: + otp: otp@40045000 { + compatible = "nxp,lpc1850-otp"; + reg = <0x40045000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + }; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding @ 2016-09-13 16:12 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: linux-arm-kernel Documenation for the LPC18xx/43xx OTP memory bindings. Signed-off-by: Joachim Eastwood <manabian@gmail.com> --- .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt new file mode 100644 index 0000000..853b6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt @@ -0,0 +1,20 @@ +* NXP LPC18xx OTP memory + +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. + +Required properties: + - compatible: Should be "nxp,lpc1850-otp" + - reg: Must contain an entry with the physical base address and length + for each entry in reg-names. + - address-cells: must be set to 1. + - size-cells: must be set to 1. + +See nvmem.txt for more information. + +Example: + otp: otp at 40045000 { + compatible = "nxp,lpc1850-otp"; + reg = <0x40045000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + }; -- 2.9.3 ^ permalink raw reply related [flat|nested] 14+ messages in thread
[parent not found: <20160913161241.22492-3-manabian-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]
* Re: [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding 2016-09-13 16:12 ` Joachim Eastwood @ 2016-09-23 13:35 ` Rob Herring -1 siblings, 0 replies; 14+ messages in thread From: Rob Herring @ 2016-09-23 13:35 UTC (permalink / raw) To: Joachim Eastwood Cc: srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A, maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA On Tue, Sep 13, 2016 at 06:12:40PM +0200, Joachim Eastwood wrote: > Documenation for the LPC18xx/43xx OTP memory bindings. > > Signed-off-by: Joachim Eastwood <manabian-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > --- > .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > > diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > new file mode 100644 > index 0000000..853b6a7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > @@ -0,0 +1,20 @@ > +* NXP LPC18xx OTP memory > + > +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. > + > +Required properties: > + - compatible: Should be "nxp,lpc1850-otp" > + - reg: Must contain an entry with the physical base address and length > + for each entry in reg-names. > + - address-cells: must be set to 1. > + - size-cells: must be set to 1. Not needed unless you have child nodes. > + > +See nvmem.txt for more information. > + > +Example: > + otp: otp@40045000 { > + compatible = "nxp,lpc1850-otp"; > + reg = <0x40045000 0x1000>; > + #address-cells = <1>; > + #size-cells = <1>; > + }; > -- > 2.9.3 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding @ 2016-09-23 13:35 ` Rob Herring 0 siblings, 0 replies; 14+ messages in thread From: Rob Herring @ 2016-09-23 13:35 UTC (permalink / raw) To: linux-arm-kernel On Tue, Sep 13, 2016 at 06:12:40PM +0200, Joachim Eastwood wrote: > Documenation for the LPC18xx/43xx OTP memory bindings. > > Signed-off-by: Joachim Eastwood <manabian@gmail.com> > --- > .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > > diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > new file mode 100644 > index 0000000..853b6a7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt > @@ -0,0 +1,20 @@ > +* NXP LPC18xx OTP memory > + > +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. > + > +Required properties: > + - compatible: Should be "nxp,lpc1850-otp" > + - reg: Must contain an entry with the physical base address and length > + for each entry in reg-names. > + - address-cells: must be set to 1. > + - size-cells: must be set to 1. Not needed unless you have child nodes. > + > +See nvmem.txt for more information. > + > +Example: > + otp: otp at 40045000 { > + compatible = "nxp,lpc1850-otp"; > + reg = <0x40045000 0x1000>; > + #address-cells = <1>; > + #size-cells = <1>; > + }; > -- > 2.9.3 > ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding 2016-09-23 13:35 ` Rob Herring @ 2016-09-23 20:05 ` Joachim Eastwood -1 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-23 20:05 UTC (permalink / raw) To: Rob Herring Cc: Srinivas Kandagatla, Maxime Ripard, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree On 23 September 2016 at 15:35, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote: > On Tue, Sep 13, 2016 at 06:12:40PM +0200, Joachim Eastwood wrote: >> Documenation for the LPC18xx/43xx OTP memory bindings. >> >> Signed-off-by: Joachim Eastwood <manabian-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> >> --- >> .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ >> 1 file changed, 20 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> >> diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> new file mode 100644 >> index 0000000..853b6a7 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> @@ -0,0 +1,20 @@ >> +* NXP LPC18xx OTP memory >> + >> +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. >> + >> +Required properties: >> + - compatible: Should be "nxp,lpc1850-otp" >> + - reg: Must contain an entry with the physical base address and length >> + for each entry in reg-names. > >> + - address-cells: must be set to 1. >> + - size-cells: must be set to 1. > > Not needed unless you have child nodes. They will have "nvmem" cell children. See patch 3/3 + /* Flashless devices has part ID in OTP bank 0 */ + part_id: identification@0 { + reg = <0x0 0x10>; + }; These cells are documented in nvmem.txt. regards, Joachim Eastwood -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding @ 2016-09-23 20:05 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-23 20:05 UTC (permalink / raw) To: linux-arm-kernel On 23 September 2016 at 15:35, Rob Herring <robh@kernel.org> wrote: > On Tue, Sep 13, 2016 at 06:12:40PM +0200, Joachim Eastwood wrote: >> Documenation for the LPC18xx/43xx OTP memory bindings. >> >> Signed-off-by: Joachim Eastwood <manabian@gmail.com> >> --- >> .../devicetree/bindings/nvmem/lpc1850-otp.txt | 20 ++++++++++++++++++++ >> 1 file changed, 20 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> >> diff --git a/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> new file mode 100644 >> index 0000000..853b6a7 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/nvmem/lpc1850-otp.txt >> @@ -0,0 +1,20 @@ >> +* NXP LPC18xx OTP memory >> + >> +Internal OTP (One Time Programmable) memory for NXP LPC18xx/43xx devices. >> + >> +Required properties: >> + - compatible: Should be "nxp,lpc1850-otp" >> + - reg: Must contain an entry with the physical base address and length >> + for each entry in reg-names. > >> + - address-cells: must be set to 1. >> + - size-cells: must be set to 1. > > Not needed unless you have child nodes. They will have "nvmem" cell children. See patch 3/3 + /* Flashless devices has part ID in OTP bank 0 */ + part_id: identification at 0 { + reg = <0x0 0x10>; + }; These cells are documented in nvmem.txt. regards, Joachim Eastwood ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH 3/3] ARM: dts: lpc18xx: add otp node 2016-09-13 16:12 ` Joachim Eastwood @ 2016-09-13 16:12 ` Joachim Eastwood -1 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: manabian-Re5JQEeQqe8AvxtiuMwx3w Cc: srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A, maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8, robh+dt-DgEjT+Ai2ygdnm+yROfE0A, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA Add node for the internal OTP (One Time Programmable) memory found on all LPC18xx/43xx SoCs. Signed-off-by: Joachim Eastwood <manabian-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> --- arch/arm/boot/dts/lpc18xx.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/boot/dts/lpc18xx.dtsi b/arch/arm/boot/dts/lpc18xx.dtsi index c6508ed..7ef0bc8 100644 --- a/arch/arm/boot/dts/lpc18xx.dtsi +++ b/arch/arm/boot/dts/lpc18xx.dtsi @@ -250,6 +250,18 @@ }; }; + otp@40045000 { + compatible = "nxp,lpc1850-otp"; + reg = <0x40045000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + + /* Flashless devices has part ID in OTP bank 0 */ + part_id: identification@0 { + reg = <0x0 0x10>; + }; + }; + rtc: rtc@40046000 { compatible = "nxp,lpc1850-rtc", "nxp,lpc1788-rtc"; reg = <0x40046000 0x1000>; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH 3/3] ARM: dts: lpc18xx: add otp node @ 2016-09-13 16:12 ` Joachim Eastwood 0 siblings, 0 replies; 14+ messages in thread From: Joachim Eastwood @ 2016-09-13 16:12 UTC (permalink / raw) To: linux-arm-kernel Add node for the internal OTP (One Time Programmable) memory found on all LPC18xx/43xx SoCs. Signed-off-by: Joachim Eastwood <manabian@gmail.com> --- arch/arm/boot/dts/lpc18xx.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/boot/dts/lpc18xx.dtsi b/arch/arm/boot/dts/lpc18xx.dtsi index c6508ed..7ef0bc8 100644 --- a/arch/arm/boot/dts/lpc18xx.dtsi +++ b/arch/arm/boot/dts/lpc18xx.dtsi @@ -250,6 +250,18 @@ }; }; + otp at 40045000 { + compatible = "nxp,lpc1850-otp"; + reg = <0x40045000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + + /* Flashless devices has part ID in OTP bank 0 */ + part_id: identification at 0 { + reg = <0x0 0x10>; + }; + }; + rtc: rtc at 40046000 { compatible = "nxp,lpc1850-rtc", "nxp,lpc1788-rtc"; reg = <0x40046000 0x1000>; -- 2.9.3 ^ permalink raw reply related [flat|nested] 14+ messages in thread
end of thread, other threads:[~2016-10-08 10:26 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
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2016-09-13 16:12 [PATCH 0/3] nvmem: add lpc18xx OTP memory driver Joachim Eastwood
2016-09-13 16:12 ` Joachim Eastwood
2016-09-13 16:12 ` [PATCH 1/3] nvmem: add NXP LPC18xx OTP driver Joachim Eastwood
2016-09-19 10:56 ` Srinivas Kandagatla
2016-10-07 1:44 ` Vladimir Zapolskiy
2016-10-08 10:26 ` Joachim Eastwood
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2016-09-13 16:12 ` [PATCH 2/3] nvmem: dt: document lpc1850 OTP binding Joachim Eastwood
2016-09-13 16:12 ` Joachim Eastwood
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2016-09-23 13:35 ` Rob Herring
2016-09-23 13:35 ` Rob Herring
2016-09-23 20:05 ` Joachim Eastwood
2016-09-23 20:05 ` Joachim Eastwood
2016-09-13 16:12 ` [PATCH 3/3] ARM: dts: lpc18xx: add otp node Joachim Eastwood
2016-09-13 16:12 ` Joachim Eastwood
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