From: Roger Quadros <rogerq@kernel.org>
To: MD Danish Anwar <danishanwar@ti.com>,
"Andrew F. Davis" <afd@ti.com>, Suman Anna <s-anna@ti.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Santosh Shilimkar <ssantosh@kernel.org>,
Nishanth Menon <nm@ti.com>
Cc: linux-remoteproc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
srk@ti.com, devicetree@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v4 3/5] soc: ti: pruss: Add pruss_cfg_read()/update() API
Date: Wed, 15 Mar 2023 14:07:28 +0200 [thread overview]
Message-ID: <91481d4f-2005-7b33-d3be-df09b7d27ef6@kernel.org> (raw)
In-Reply-To: <20230313111127.1229187-4-danishanwar@ti.com>
Danish,
On 13/03/2023 13:11, MD Danish Anwar wrote:
> From: Suman Anna <s-anna@ti.com>
>
> 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@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>
> Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
> ---
> drivers/soc/ti/pruss.c | 39 ++++++++++++++
> include/linux/remoteproc/pruss.h | 87 ++++++++++++++++++++++++++++++++
> 2 files changed, 126 insertions(+)
>
> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
> index c8053c0d735f..26d8129b515c 100644
> --- a/drivers/soc/ti/pruss.c
> +++ b/drivers/soc/ti/pruss.c
> @@ -164,6 +164,45 @@ int pruss_release_mem_region(struct pruss *pruss,
> }
> EXPORT_SYMBOL_GPL(pruss_release_mem_region);
>
> +/**
> + * 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);
> +}
> +
> 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 33f930e0a0ce..12ef10b9fe9a 100644
> --- a/include/linux/remoteproc/pruss.h
> +++ b/include/linux/remoteproc/pruss.h
> @@ -10,12 +10,99 @@
> #ifndef __LINUX_PRUSS_H
> #define __LINUX_PRUSS_H
>
> +#include <linux/bits.h>
> #include <linux/device.h>
> #include <linux/err.h>
> #include <linux/types.h>
>
> #define PRU_RPROC_DRVNAME "pru-rproc"
>
> +/*
> + * 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)
Can we please move all the above definitions to private driver/soc/ti/pruss.h?
You can also add pruss_cfg_read and pruss_cfg_update there.
> +
> +/*
> + * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the
> + * PRUSS_GPCFG0/1 registers
> + *
> + * NOTE: The below defines are the most common values, but there
> + * are some exceptions like on 66AK2G, where the RESERVED and MII2
> + * values are interchanged. Also, this bit-field does not exist on
> + * AM335x SoCs
> + */
> +enum pruss_gp_mux_sel {
> + PRUSS_GP_MUX_SEL_GP = 0,
> + PRUSS_GP_MUX_SEL_ENDAT,
> + PRUSS_GP_MUX_SEL_RESERVED,
> + PRUSS_GP_MUX_SEL_SD,
> + PRUSS_GP_MUX_SEL_MII2,
> + PRUSS_GP_MUX_SEL_MAX,
> +};
> +
> +/*
> + * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
> + * to program the PRUSS_GPCFG0/1 registers
> + */
> +enum pruss_gpi_mode {
> + PRUSS_GPI_MODE_DIRECT = 0,
> + PRUSS_GPI_MODE_PARALLEL,
> + PRUSS_GPI_MODE_28BIT_SHIFT,
> + PRUSS_GPI_MODE_MII,
> +};
> +
> /**
> * enum pruss_pru_id - PRU core identifiers
> * @PRUSS_PRU0: PRU Core 0.
cheers,
-roger
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next prev parent reply other threads:[~2023-03-15 12:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 11:11 [PATCH v4 0/5] Introduce PRU platform consumer API MD Danish Anwar
2023-03-13 11:11 ` [PATCH v4 1/5] soc: ti: pruss: Add pruss_get()/put() API MD Danish Anwar
2023-03-13 16:19 ` Andrew Davis
2023-03-13 11:11 ` [PATCH v4 2/5] soc: ti: pruss: Add pruss_{request,release}_mem_region() API MD Danish Anwar
2023-03-17 8:56 ` Roger Quadros
2023-03-20 5:11 ` [EXTERNAL] " Md Danish Anwar
2023-03-20 16:18 ` Andrew Davis
2023-03-21 5:23 ` Md Danish Anwar
2023-03-21 9:24 ` Roger Quadros
2023-03-21 9:48 ` [EXTERNAL] " Md Danish Anwar
2023-03-21 10:23 ` Roger Quadros
2023-03-21 10:45 ` Md Danish Anwar
2023-03-13 11:11 ` [PATCH v4 3/5] soc: ti: pruss: Add pruss_cfg_read()/update() API MD Danish Anwar
2023-03-15 12:07 ` Roger Quadros [this message]
2023-03-16 11:08 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 11:29 ` Md Danish Anwar
2023-03-16 11:32 ` Roger Quadros
2023-03-16 11:34 ` [EXTERNAL] " Md Danish Anwar
2023-03-13 11:11 ` [PATCH v4 4/5] soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR MD Danish Anwar
2023-03-15 12:22 ` Roger Quadros
2023-03-16 11:05 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 11:36 ` Roger Quadros
2023-03-16 11:44 ` Md Danish Anwar
2023-03-16 12:19 ` Roger Quadros
2023-03-16 13:11 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 14:04 ` Roger Quadros
2023-03-17 5:02 ` [EXTERNAL] " Md Danish Anwar
2023-03-17 8:31 ` Roger Quadros
2023-03-17 8:55 ` [EXTERNAL] " Md Danish Anwar
2023-03-13 11:11 ` [PATCH v4 5/5] soc: ti: pruss: Add helper functions to get/set PRUSS_CFG_GPMUX MD Danish Anwar
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