| Message ID | 1467203656-14381-5-git-send-email-carlo@caione.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 29/06/16 13:34, Carlo Caione wrote: > From: Carlo Caione <carlo@endlessm.com> > > Add Amlogic EFUSE driver to access hardware data like ethernet address, > serial number or IDs. > > Signed-off-by: Carlo Caione <carlo@endlessm.com> Patch looks good to me, Looks like there are some dependencies to this patch w.r.t sm_calls, it would be easy to take this series from single tree. Just incase you want to take this patch via some other tree, here is Ack. Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > --- > drivers/nvmem/Kconfig | 10 +++++ > drivers/nvmem/Makefile | 2 + > drivers/nvmem/meson-efuse.c | 93 +++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 105 insertions(+) > create mode 100644 drivers/nvmem/meson-efuse.c > > diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig > index 3041d48..87900d3 100644 > --- a/drivers/nvmem/Kconfig > +++ b/drivers/nvmem/Kconfig > @@ -101,4 +101,14 @@ config NVMEM_VF610_OCOTP > This driver can also be build as a module. If so, the module will > be called nvmem-vf610-ocotp. > > +config MESON_EFUSE > + tristate "Amlogic eFuse Support" > + depends on (ARCH_MESON || COMPILE_TEST) && MESON_SM > + help > + This is a driver to retrieve specific values from the eFuse found on > + the Amlogic Meson SoCs. > + > + This driver can also be built as a module. If so, the module > + will be called nvmem_meson_efuse. > + > endif > diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile > index 45ab1ae..8f942a0 100644 > --- a/drivers/nvmem/Makefile > +++ b/drivers/nvmem/Makefile > @@ -22,3 +22,5 @@ obj-$(CONFIG_NVMEM_SUNXI_SID) += nvmem_sunxi_sid.o > nvmem_sunxi_sid-y := sunxi_sid.o > obj-$(CONFIG_NVMEM_VF610_OCOTP) += nvmem-vf610-ocotp.o > nvmem-vf610-ocotp-y := vf610-ocotp.o > +obj-$(CONFIG_MESON_EFUSE) += nvmem_meson_efuse.o > +nvmem_meson_efuse-y := meson-efuse.o > diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c > new file mode 100644 > index 0000000..f207c3b > --- /dev/null > +++ b/drivers/nvmem/meson-efuse.c > @@ -0,0 +1,93 @@ > +/* > + * Amlogic eFuse Driver > + * > + * Copyright (c) 2016 Endless Computers, Inc. > + * Author: Carlo Caione <carlo@endlessm.com> > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of version 2 of the GNU General Public License as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + */ > + > +#include <linux/module.h> > +#include <linux/nvmem-provider.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > + > +#include <linux/firmware/meson/meson_sm.h> > + > +static int meson_efuse_read(void *context, unsigned int offset, > + void *val, size_t bytes) > +{ > + u8 *buf = val; > + int ret; > + > + ret = meson_sm_call_read(buf, SM_EFUSE_READ, offset, > + bytes, 0, 0, 0); > + if (ret < 0) > + return ret; > + > + return 0; > +} > + > +static struct nvmem_config econfig = { > + .name = "meson-efuse", > + .owner = THIS_MODULE, > + .stride = 1, > + .word_size = 1, > + .read_only = true, > +}; > + > +static const struct of_device_id meson_efuse_match[] = { > + { .compatible = "amlogic,meson-gxbb-efuse", }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, meson_efuse_match); > + > +static int meson_efuse_probe(struct platform_device *pdev) > +{ > + struct nvmem_device *nvmem; > + unsigned int size; > + > + if (meson_sm_call(SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0) > + return -EINVAL; > + > + econfig.dev = &pdev->dev; > + econfig.reg_read = meson_efuse_read; > + econfig.size = size; > + > + nvmem = nvmem_register(&econfig); > + if (IS_ERR(nvmem)) > + return PTR_ERR(nvmem); > + > + platform_set_drvdata(pdev, nvmem); > + > + return 0; > +} > + > +static int meson_efuse_remove(struct platform_device *pdev) > +{ > + struct nvmem_device *nvmem = platform_get_drvdata(pdev); > + > + return nvmem_unregister(nvmem); > +} > + > +static struct platform_driver meson_efuse_driver = { > + .probe = meson_efuse_probe, > + .remove = meson_efuse_remove, > + .driver = { > + .name = "meson-efuse", > + .of_match_table = meson_efuse_match, > + }, > +}; > + > +module_platform_driver(meson_efuse_driver); > + > +MODULE_AUTHOR("Carlo Caione <carlo@endlessm.com>"); > +MODULE_DESCRIPTION("Amlogic Meson NVMEM driver"); > +MODULE_LICENSE("GPL v2"); >
On 01/07/16 11:00, Srinivas Kandagatla wrote: > > > On 29/06/16 13:34, Carlo Caione wrote: > >From: Carlo Caione <carlo@endlessm.com> > > > >Add Amlogic EFUSE driver to access hardware data like ethernet address, > >serial number or IDs. > > > >Signed-off-by: Carlo Caione <carlo@endlessm.com> > > Patch looks good to me, > > Looks like there are some dependencies to this patch w.r.t sm_calls, it > would be easy to take this series from single tree. > > Just incase you want to take this patch via some other tree, here is Ack. > > Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Thanks, probably it's better to merge everything through the arm-soc tree. Cheers,
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 3041d48..87900d3 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -101,4 +101,14 @@ config NVMEM_VF610_OCOTP This driver can also be build as a module. If so, the module will be called nvmem-vf610-ocotp. +config MESON_EFUSE + tristate "Amlogic eFuse Support" + depends on (ARCH_MESON || COMPILE_TEST) && MESON_SM + help + This is a driver to retrieve specific values from the eFuse found on + the Amlogic Meson SoCs. + + This driver can also be built as a module. If so, the module + will be called nvmem_meson_efuse. + endif diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 45ab1ae..8f942a0 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -22,3 +22,5 @@ obj-$(CONFIG_NVMEM_SUNXI_SID) += nvmem_sunxi_sid.o nvmem_sunxi_sid-y := sunxi_sid.o obj-$(CONFIG_NVMEM_VF610_OCOTP) += nvmem-vf610-ocotp.o nvmem-vf610-ocotp-y := vf610-ocotp.o +obj-$(CONFIG_MESON_EFUSE) += nvmem_meson_efuse.o +nvmem_meson_efuse-y := meson-efuse.o diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c new file mode 100644 index 0000000..f207c3b --- /dev/null +++ b/drivers/nvmem/meson-efuse.c @@ -0,0 +1,93 @@ +/* + * Amlogic eFuse Driver + * + * Copyright (c) 2016 Endless Computers, Inc. + * Author: Carlo Caione <carlo@endlessm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/module.h> +#include <linux/nvmem-provider.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#include <linux/firmware/meson/meson_sm.h> + +static int meson_efuse_read(void *context, unsigned int offset, + void *val, size_t bytes) +{ + u8 *buf = val; + int ret; + + ret = meson_sm_call_read(buf, SM_EFUSE_READ, offset, + bytes, 0, 0, 0); + if (ret < 0) + return ret; + + return 0; +} + +static struct nvmem_config econfig = { + .name = "meson-efuse", + .owner = THIS_MODULE, + .stride = 1, + .word_size = 1, + .read_only = true, +}; + +static const struct of_device_id meson_efuse_match[] = { + { .compatible = "amlogic,meson-gxbb-efuse", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, meson_efuse_match); + +static int meson_efuse_probe(struct platform_device *pdev) +{ + struct nvmem_device *nvmem; + unsigned int size; + + if (meson_sm_call(SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0) + return -EINVAL; + + econfig.dev = &pdev->dev; + econfig.reg_read = meson_efuse_read; + econfig.size = size; + + nvmem = nvmem_register(&econfig); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + return 0; +} + +static int meson_efuse_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + + return nvmem_unregister(nvmem); +} + +static struct platform_driver meson_efuse_driver = { + .probe = meson_efuse_probe, + .remove = meson_efuse_remove, + .driver = { + .name = "meson-efuse", + .of_match_table = meson_efuse_match, + }, +}; + +module_platform_driver(meson_efuse_driver); + +MODULE_AUTHOR("Carlo Caione <carlo@endlessm.com>"); +MODULE_DESCRIPTION("Amlogic Meson NVMEM driver"); +MODULE_LICENSE("GPL v2");