On Thu, Mar 23, 2023 at 11:54:49AM +0530, MD Danish Anwar wrote: > From: Suman Anna <s-anna@xxxxxx> > > Add two new generic API pruss_cfg_read() and pruss_cfg_update() to > the PRUSS platform driver to read and program respectively a register > within the PRUSS CFG sub-module represented by a syscon driver. > > These APIs are internal to PRUSS driver. Various useful registers > and macros for certain register bit-fields and their values have also > been added. > > Signed-off-by: Suman Anna <s-anna@xxxxxx> > Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx> > Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx> > Signed-off-by: Puranjay Mohan <p-mohan@xxxxxx> > Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx> > --- > drivers/soc/ti/pruss.c | 1 + > drivers/soc/ti/pruss.h | 112 +++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 113 insertions(+) > create mode 100644 drivers/soc/ti/pruss.h > This patch doesn't compile without warnings. > diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c > index 126b672b9b30..2fa7df667592 100644 > --- a/drivers/soc/ti/pruss.c > +++ b/drivers/soc/ti/pruss.c > @@ -21,6 +21,7 @@ > #include <linux/regmap.h> > #include <linux/remoteproc.h> > #include <linux/slab.h> > +#include "pruss.h" > > /** > * struct pruss_private_data - PRUSS driver private data > diff --git a/drivers/soc/ti/pruss.h b/drivers/soc/ti/pruss.h > new file mode 100644 > index 000000000000..4626d5f6b874 > --- /dev/null > +++ b/drivers/soc/ti/pruss.h > @@ -0,0 +1,112 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ > +/* > + * PRU-ICSS Subsystem user interfaces > + * > + * Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com > + * MD Danish Anwar <danishanwar@xxxxxx> > + */ > + > +#ifndef _SOC_TI_PRUSS_H_ > +#define _SOC_TI_PRUSS_H_ > + > +#include <linux/bits.h> > +#include <linux/regmap.h> > + > +/* > + * PRU_ICSS_CFG registers > + * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only > + */ > +#define PRUSS_CFG_REVID 0x00 > +#define PRUSS_CFG_SYSCFG 0x04 > +#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4) > +#define PRUSS_CFG_CGR 0x10 > +#define PRUSS_CFG_ISRP 0x14 > +#define PRUSS_CFG_ISP 0x18 > +#define PRUSS_CFG_IESP 0x1C > +#define PRUSS_CFG_IECP 0x20 > +#define PRUSS_CFG_SCRP 0x24 > +#define PRUSS_CFG_PMAO 0x28 > +#define PRUSS_CFG_MII_RT 0x2C > +#define PRUSS_CFG_IEPCLK 0x30 > +#define PRUSS_CFG_SPP 0x34 > +#define PRUSS_CFG_PIN_MX 0x40 > + > +/* PRUSS_GPCFG register bits */ > +#define PRUSS_GPCFG_PRU_GPO_SH_SEL BIT(25) > + > +#define PRUSS_GPCFG_PRU_DIV1_SHIFT 20 > +#define PRUSS_GPCFG_PRU_DIV1_MASK GENMASK(24, 20) > + > +#define PRUSS_GPCFG_PRU_DIV0_SHIFT 15 > +#define PRUSS_GPCFG_PRU_DIV0_MASK GENMASK(15, 19) > + > +#define PRUSS_GPCFG_PRU_GPO_MODE BIT(14) > +#define PRUSS_GPCFG_PRU_GPO_MODE_DIRECT 0 > +#define PRUSS_GPCFG_PRU_GPO_MODE_SERIAL BIT(14) > + > +#define PRUSS_GPCFG_PRU_GPI_SB BIT(13) > + > +#define PRUSS_GPCFG_PRU_GPI_DIV1_SHIFT 8 > +#define PRUSS_GPCFG_PRU_GPI_DIV1_MASK GENMASK(12, 8) > + > +#define PRUSS_GPCFG_PRU_GPI_DIV0_SHIFT 3 > +#define PRUSS_GPCFG_PRU_GPI_DIV0_MASK GENMASK(7, 3) > + > +#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_POSITIVE 0 > +#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_NEGATIVE BIT(2) > +#define PRUSS_GPCFG_PRU_GPI_CLK_MODE BIT(2) > + > +#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0) > +#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0 > + > +#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26 > +#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26) > + > +/* PRUSS_MII_RT register bits */ > +#define PRUSS_MII_RT_EVENT_EN BIT(0) > + > +/* PRUSS_SPP register bits */ > +#define PRUSS_SPP_XFER_SHIFT_EN BIT(1) > +#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0) > +#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3) > + > +/** > + * pruss_cfg_read() - read a PRUSS CFG sub-module register > + * @pruss: the pruss instance handle > + * @reg: register offset within the CFG sub-module > + * @val: pointer to return the value in > + * > + * Reads a given register within the PRUSS CFG sub-module and > + * returns it through the passed-in @val pointer > + * > + * Return: 0 on success, or an error code otherwise > + */ > +static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return -EINVAL; > + > + return regmap_read(pruss->cfg_regmap, reg, val); > +} > + > +/** > + * pruss_cfg_update() - configure a PRUSS CFG sub-module register > + * @pruss: the pruss instance handle > + * @reg: register offset within the CFG sub-module > + * @mask: bit mask to use for programming the @val > + * @val: value to write > + * > + * Programs a given register within the PRUSS CFG sub-module > + * > + * Return: 0 on success, or an error code otherwise > + */ > +static int pruss_cfg_update(struct pruss *pruss, unsigned int reg, > + unsigned int mask, unsigned int val) > +{ > + if (IS_ERR_OR_NULL(pruss)) > + return -EINVAL; > + > + return regmap_update_bits(pruss->cfg_regmap, reg, mask, val); > +} > + > +#endif /* _SOC_TI_PRUSS_H_ */ > -- > 2.25.1 >
