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Davis" , Suman Anna , Roger Quadros , Vignesh Raghavendra , MD Danish Anwar , Mathieu Poirier , Bjorn Andersson , Santosh Shilimkar , Nishanth Menon CC: , , , , , , Subject: [PATCH v4 5/5] soc: ti: pruss: Add helper functions to get/set PRUSS_CFG_GPMUX Date: Mon, 13 Mar 2023 16:41:27 +0530 Message-ID: <20230313111127.1229187-6-danishanwar@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230313111127.1229187-1-danishanwar@ti.com> References: <20230313111127.1229187-1-danishanwar@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Tero Kristo 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. Co-developed-by: Suman Anna Signed-off-by: Suman Anna Signed-off-by: Tero Kristo 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 | 44 ++++++++++++++++++++++++++++++++ include/linux/remoteproc/pruss.h | 12 +++++++++ 2 files changed, 56 insertions(+) diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c index 2f04b7922ddb..90f81f4d77fb 100644 --- a/drivers/soc/ti/pruss.c +++ b/drivers/soc/ti/pruss.c @@ -263,6 +263,50 @@ int pruss_cfg_xfr_enable(struct pruss *pruss, bool enable, u32 mask) } EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable); +/** + * pruss_cfg_get_gpmux() - get the current GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: pointer to store the current mux value into + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) +{ + int ret = 0; + u32 val; + + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) + return -EINVAL; + + ret = pruss_cfg_read(pruss, PRUSS_CFG_GPCFG(pru_id), &val); + if (!ret) + *mux = (u8)((val & PRUSS_GPCFG_PRU_MUX_SEL_MASK) >> + PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); + return ret; +} +EXPORT_SYMBOL_GPL(pruss_cfg_get_gpmux); + +/** + * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device + * @pruss: pruss instance + * @pru_id: PRU identifier (0-1) + * @mux: new mux value for PRU + * + * Return: 0 on success, or an error code otherwise + */ +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) +{ + if (mux >= PRUSS_GP_MUX_SEL_MAX || + pru_id < 0 || pru_id >= PRUSS_NUM_PRUS) + return -EINVAL; + + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id), + PRUSS_GPCFG_PRU_MUX_SEL_MASK, + (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT); +} +EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux); + static void pruss_of_free_clk_provider(void *data) { struct device_node *clk_mux_np = data; diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h index 51a3eedd2be6..4138a9fcc3ad 100644 --- a/include/linux/remoteproc/pruss.h +++ b/include/linux/remoteproc/pruss.h @@ -170,6 +170,8 @@ int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id, enum pruss_gpi_mode mode); int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable); int pruss_cfg_xfr_enable(struct pruss *pruss, bool enable, u32 mask); +int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux); +int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux); #else @@ -210,6 +212,16 @@ static inline int pruss_cfg_xfr_enable(struct pruss *pruss, bool enable, u32 mas return ERR_PTR(-EOPNOTSUPP); } +static inline int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +static inline int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux) +{ + return ERR_PTR(-EOPNOTSUPP); +} + #endif /* CONFIG_TI_PRUSS */ #if IS_ENABLED(CONFIG_PRU_REMOTEPROC) -- 2.25.1