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Message-ID: <bcbea902-6579-f1d4-421e-915e8855822a@microchip.com>
Date: Mon, 1 Aug 2022 09:56:40 +0000
From: <Claudiu.Beznea@...rochip.com>
To: <radhey.shyam.pandey@....com>, <michal.simek@...inx.com>,
<Nicolas.Ferre@...rochip.com>, <davem@...emloft.net>,
<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
<gregkh@...uxfoundation.org>
CC: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
<git@....com>, <git@...inx.com>, <ronak.jain@...inx.com>
Subject: Re: [PATCH v2 net-next 1/2] firmware: xilinx: add support for sd/gem
config
On 29.07.2022 22:35, Radhey Shyam Pandey wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> From: Ronak Jain <ronak.jain@...inx.com>
>
> Add new APIs in firmware to configure SD/GEM registers. Internally
> it calls PM IOCTL for below SD/GEM register configuration:
> - SD/EMMC select
> - SD slot type
> - SD base clock
> - SD 8 bit support
> - SD fixed config
> - GEM SGMII Mode
> - GEM fixed config
>
> Signed-off-by: Ronak Jain <ronak.jain@...inx.com>
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> ---
> Changes for v2:
> - Use tab indent for zynqmp_pm_set_sd/gem_config return documentation.
> ---
> drivers/firmware/xilinx/zynqmp.c | 31 +++++++++++++++++++++++++++++++
> include/linux/firmware/xlnx-zynqmp.h | 33 +++++++++++++++++++++++++++++++++
> 2 files changed, 64 insertions(+)
>
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index 7977a494a651..44c44077dfc5 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -1298,6 +1298,37 @@ int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
> }
>
> /**
> + * zynqmp_pm_set_sd_config - PM call to set value of SD config registers
> + * @node: SD node ID
> + * @config: The config type of SD registers
> + * @value: Value to be set
> + *
> + * Return: Returns 0 on success or error value on failure.
> + */
> +int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
> +{
> + return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_SD_CONFIG,
> + config, value, NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_config);
> +
> +/**
> + * zynqmp_pm_set_gem_config - PM call to set value of GEM config registers
> + * @node: GEM node ID
> + * @config: The config type of GEM registers
> + * @value: Value to be set
> + *
> + * Return: Returns 0 on success or error value on failure.
> + */
> +int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
> + u32 value)
> +{
> + return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_GEM_CONFIG,
> + config, value, NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_set_gem_config);
> +
> +/**
> * struct zynqmp_pm_shutdown_scope - Struct for shutdown scope
> * @subtype: Shutdown subtype
> * @name: Matching string for scope argument
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index 1ec73d5352c3..063a93c133f1 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -152,6 +152,9 @@ enum pm_ioctl_id {
> /* Runtime feature configuration */
> IOCTL_SET_FEATURE_CONFIG = 26,
> IOCTL_GET_FEATURE_CONFIG = 27,
> + /* Dynamic SD/GEM configuration */
> + IOCTL_SET_SD_CONFIG = 30,
> + IOCTL_SET_GEM_CONFIG = 31,
> };
>
> enum pm_query_id {
> @@ -393,6 +396,18 @@ enum pm_feature_config_id {
> PM_FEATURE_EXTWDT_VALUE = 4,
> };
>
> +enum pm_sd_config_type {
> + SD_CONFIG_EMMC_SEL = 1, /* To set SD_EMMC_SEL in CTRL_REG_SD and SD_SLOTTYPE */
> + SD_CONFIG_BASECLK = 2, /* To set SD_BASECLK in SD_CONFIG_REG1 */
> + SD_CONFIG_8BIT = 3, /* To set SD_8BIT in SD_CONFIG_REG2 */
> + SD_CONFIG_FIXED = 4, /* To set fixed config registers */
> +};
> +
> +enum pm_gem_config_type {
> + GEM_CONFIG_SGMII_MODE = 1, /* To set GEM_SGMII_MODE in GEM_CLK_CTRL register */
> + GEM_CONFIG_FIXED = 2, /* To set fixed config registers */
> +};
As you adapted kernel style documentation for the rest of code added in
this patch you can follow this rules for enums, too.
> +
> /**
> * struct zynqmp_pm_query_data - PM query data
> * @qid: query ID
> @@ -468,6 +483,9 @@ int zynqmp_pm_feature(const u32 api_id);
> int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id);
> int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value);
> int zynqmp_pm_get_feature_config(enum pm_feature_config_id id, u32 *payload);
> +int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value);
> +int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
> + u32 value);
> #else
> static inline int zynqmp_pm_get_api_version(u32 *version)
> {
> @@ -733,6 +751,21 @@ static inline int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
> {
> return -ENODEV;
> }
> +
> +static inline int zynqmp_pm_set_sd_config(u32 node,
> + enum pm_sd_config_type config,
> + u32 value)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int zynqmp_pm_set_gem_config(u32 node,
> + enum pm_gem_config_type config,
> + u32 value)
> +{
> + return -ENODEV;
> +}
> +
> #endif
>
> #endif /* __FIRMWARE_ZYNQMP_H__ */
> --
> 2.1.1
>
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