On Fri, Jan 14, 2022 at 05:52:07PM +0100, Jules Maselbas wrote: > From: Clement Leger <[email protected]> > > Backport Linux driver to barebox to access nvmem. > > Signed-off-by: Clement Leger <[email protected]> > Signed-off-by: Jules Maselbas <[email protected]> > --- > drivers/nvmem/Kconfig | 7 +++ > drivers/nvmem/Makefile | 3 ++ > drivers/nvmem/kvx-otp-nv.c | 99 ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 109 insertions(+) > create mode 100644 drivers/nvmem/kvx-otp-nv.c > > diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig > index 07320101b8..3624cc64b6 100644 > --- a/drivers/nvmem/Kconfig > +++ b/drivers/nvmem/Kconfig > @@ -66,6 +66,13 @@ config STM32_BSEC > This adds support for the STM32 OTP controller. Reads and writes > to will go to the shadow RAM, not the OTP fuses themselvers. > > +config KVX_OTP_NV > + tristate "kalray KVX OTP Non volatile regs Support" > + depends on KVX > + help > + This is a simple driver to dump specified values of KVX OTP non > + volatile regs. > + > config STARFIVE_OTP > tristate "Starfive OTP Supprot" > depends on SOC_STARFIVE > diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile > index cd970aaea1..81629ddb27 100644 > --- a/drivers/nvmem/Makefile > +++ b/drivers/nvmem/Makefile > @@ -24,4 +24,7 @@ nvmem_eeprom_93xx46-y := eeprom_93xx46.o > obj-$(CONFIG_STM32_BSEC) += nvmem_bsec.o > nvmem_bsec-y := bsec.o > > +obj-$(CONFIG_KVX_OTP_NV) += nvmem-kvx-otp-nv.o > +nvmem-kvx-otp-nv-y := kvx-otp-nv.o > + > obj-$(CONFIG_STARFIVE_OTP) += starfive-otp.o > diff --git a/drivers/nvmem/kvx-otp-nv.c b/drivers/nvmem/kvx-otp-nv.c > new file mode 100644 > index 0000000000..f997f8a63b > --- /dev/null > +++ b/drivers/nvmem/kvx-otp-nv.c > @@ -0,0 +1,99 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) 2020 Kalray Inc., Clément Léger > + */ > + > +#include <common.h> > +#include <driver.h> > +#include <malloc.h> > +#include <xfuncs.h> > +#include <errno.h> > +#include <init.h> > +#include <net.h> > +#include <io.h> > + > +#include <linux/nvmem-provider.h> > + > +#define OTP_NV_ALIGN 4 > +#define OTP_NV_ALIGN_MASK (OTP_NV_ALIGN - 1) > + > +struct kvx_otp_nv_priv { > + void __iomem *base; > +}; > + > +static int kvx_otp_nv_read(void *context, unsigned int offset, > + void *_val, size_t bytes) > +{ > + struct kvx_otp_nv_priv *priv = context; > + u8 *val = _val; > + u32 tmp, copy_size; > + u8 skip = offset & OTP_NV_ALIGN_MASK; > + > + offset &= ~OTP_NV_ALIGN_MASK; > + > + while (bytes) { > + tmp = readl(priv->base + offset); > + if (skip != 0) > + copy_size = min(OTP_NV_ALIGN - skip, (int) bytes); > + else > + copy_size = min(bytes, sizeof(tmp)); > + > + memcpy(val, ((u8 *) &tmp) + skip, copy_size); > + if (skip != 0) > + skip = 0;
The if() here is unnecessary. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
