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Davis" , Suman Anna , Roger Quadros , Vignesh Raghavendra , Tero Kristo , MD Danish Anwar , Mathieu Poirier , Bjorn Andersson , Santosh Shilimkar , Nishanth Menon CC: , , , , , , Subject: [PATCH v5 3/5] soc: ti: pruss: Add pruss_cfg_read()/update() API Date: Thu, 23 Mar 2023 11:54:49 +0530 Message-ID: <20230323062451.2925996-4-danishanwar@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230323062451.2925996-1-danishanwar@ti.com> References: <20230323062451.2925996-1-danishanwar@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230322_232511_330487_655D9E4C X-CRM114-Status: GOOD ( 17.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suman Anna 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 Co-developed-by: Grzegorz Jaszczyk Signed-off-by: Grzegorz Jaszczyk Signed-off-by: Puranjay Mohan Signed-off-by: MD Danish Anwar Reviewed-by: Roger Quadros --- 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 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 #include #include +#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 + */ + +#ifndef _SOC_TI_PRUSS_H_ +#define _SOC_TI_PRUSS_H_ + +#include +#include + +/* + * 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_ */