51b5760e56
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. Add two new helper functions pruss_cfg_get_gpmux() & pruss_cfg_set_gpmux() to get and set the GP MUX mode for programming the PRUSS internal wrapper mux functionality as needed by usecases. Various useful registers and macros for certain register bit-fields and their values have also been added. Signed-off-by: Suman Anna <s-anna@ti.com> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> Signed-off-by: Puranjay Mohan <p-mohan@ti.com> Reviewed-by: Roger Quadros <rogerq@kernel.org> Reviewed-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> Link: https://lore.kernel.org/r/20230414045542.3249939-4-danishanwar@ti.com Signed-off-by: Nishanth Menon <nm@ti.com>
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* PRU-ICSS Subsystem user interfaces
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*
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* Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com
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* MD Danish Anwar <danishanwar@ti.com>
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*/
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#ifndef _SOC_TI_PRUSS_H_
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#define _SOC_TI_PRUSS_H_
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#include <linux/bits.h>
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#include <linux/regmap.h>
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/*
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* PRU_ICSS_CFG registers
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* SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only
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*/
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#define PRUSS_CFG_REVID 0x00
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#define PRUSS_CFG_SYSCFG 0x04
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#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4)
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#define PRUSS_CFG_CGR 0x10
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#define PRUSS_CFG_ISRP 0x14
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#define PRUSS_CFG_ISP 0x18
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#define PRUSS_CFG_IESP 0x1C
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#define PRUSS_CFG_IECP 0x20
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#define PRUSS_CFG_SCRP 0x24
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#define PRUSS_CFG_PMAO 0x28
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#define PRUSS_CFG_MII_RT 0x2C
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#define PRUSS_CFG_IEPCLK 0x30
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#define PRUSS_CFG_SPP 0x34
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#define PRUSS_CFG_PIN_MX 0x40
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/* PRUSS_GPCFG register bits */
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#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0)
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#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0
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#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26
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#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26)
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/* PRUSS_MII_RT register bits */
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#define PRUSS_MII_RT_EVENT_EN BIT(0)
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/* PRUSS_SPP register bits */
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#define PRUSS_SPP_XFER_SHIFT_EN BIT(1)
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#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0)
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#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3)
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/**
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* pruss_cfg_read() - read a PRUSS CFG sub-module register
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* @pruss: the pruss instance handle
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* @reg: register offset within the CFG sub-module
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* @val: pointer to return the value in
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*
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* Reads a given register within the PRUSS CFG sub-module and
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* returns it through the passed-in @val pointer
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*
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* Return: 0 on success, or an error code otherwise
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*/
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static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val)
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{
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if (IS_ERR_OR_NULL(pruss))
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return -EINVAL;
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return regmap_read(pruss->cfg_regmap, reg, val);
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}
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/**
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* pruss_cfg_update() - configure a PRUSS CFG sub-module register
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* @pruss: the pruss instance handle
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* @reg: register offset within the CFG sub-module
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* @mask: bit mask to use for programming the @val
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* @val: value to write
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*
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* Programs a given register within the PRUSS CFG sub-module
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*
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* Return: 0 on success, or an error code otherwise
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*/
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static int pruss_cfg_update(struct pruss *pruss, unsigned int reg,
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unsigned int mask, unsigned int val)
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{
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if (IS_ERR_OR_NULL(pruss))
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return -EINVAL;
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return regmap_update_bits(pruss->cfg_regmap, reg, mask, val);
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}
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#endif /* _SOC_TI_PRUSS_H_ */
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