On 8/5/21 7:42 PM, Piyush Mehta wrote:
> Add Xilinx ZynqMP firmware MMIO APIs support to set and get PS_MODE
> pins value and status. These APIs create an interface path between
> mode pin controller driver and low-level API to access GPIO pins.
>
> Signed-off-by: Piyush Mehta <piyush.mehta@xxxxxxxxxx>
> ---
> Changes in v2:
> - Added Xilinx ZynqMP firmware MMIO API support to set and get pin
> value and status.
> ---
> drivers/firmware/xilinx/zynqmp.c | 46 ++++++++++++++++++++++++++++++++++++
> include/linux/firmware/xlnx-zynqmp.h | 14 +++++++++++
> 2 files changed, 60 insertions(+)
>
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index 15b13832..0234423 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -28,6 +28,13 @@
> /* Max HashMap Order for PM API feature check (1<<7 = 128) */
> #define PM_API_FEATURE_CHECK_MAX_ORDER 7
>
> +/* CRL registers and bitfields */
> +#define CRL_APB_BASE 0xFF5E0000U
> +/* BOOT_PIN_CTRL- Used to control the mode pins after boot */
> +#define CRL_APB_BOOT_PIN_CTRL (CRL_APB_BASE + (0x250U))
> +/* BOOT_PIN_CTRL_MASK- out_val[11:8], out_en[3:0] */
> +#define CRL_APB_BOOTPIN_CTRL_MASK 0xF0FU
> +
> static bool feature_check_enabled;
> static DEFINE_HASHTABLE(pm_api_features_map, PM_API_FEATURE_CHECK_MAX_ORDER);
>
> @@ -926,6 +933,45 @@ int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
> EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config);
>
> /**
> + * zynqmp_pm_bootmode_read() - PM Config API for read bootpin status
> + * @ps_mode: Returned output value of ps_mode
> + *
> + * This API function is to be used for notify the power management controller
> + * to read bootpin status.
> + *
> + * Return: status, either success or error+reason
> + */
> +unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode)
> +{
> + unsigned int ret;
> + u32 ret_payload[PAYLOAD_ARG_CNT];
> +
> + ret = zynqmp_pm_invoke_fn(PM_MMIO_READ, CRL_APB_BOOT_PIN_CTRL, 0,
> + 0, 0, ret_payload);
> +
> + *ps_mode = ret_payload[1];
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_read);
> +
> +/**
> + * zynqmp_pm_bootmode_write() - PM Config API for Configure bootpin
> + * @ps_mode: Value to be written to the bootpin ctrl register
> + *
> + * This API function is to be used for notify the power management controller
> + * to configure bootpin.
> + *
> + * Return: Returns status, either success or error+reason
> + */
> +int zynqmp_pm_bootmode_write(u32 ps_mode)
> +{
> + return zynqmp_pm_invoke_fn(PM_MMIO_WRITE, CRL_APB_BOOT_PIN_CTRL,
> + CRL_APB_BOOTPIN_CTRL_MASK, ps_mode, 0, NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_write);
> +
> +/**
> * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
> * master has initialized its own power management
> *
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index 9d1a5c1..dc6f39f 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -68,6 +68,8 @@ enum pm_api_id {
> PM_SET_REQUIREMENT = 15,
> PM_RESET_ASSERT = 17,
> PM_RESET_GET_STATUS = 18,
> + PM_MMIO_WRITE = 19,
> + PM_MMIO_READ = 20,
> PM_PM_INIT_FINALIZE = 21,
> PM_FPGA_LOAD = 22,
> PM_FPGA_GET_STATUS = 23,
> @@ -386,6 +388,8 @@ int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type);
> int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
> const enum zynqmp_pm_reset_action assert_flag);
> int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset, u32 *status);
> +unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode);
> +int zynqmp_pm_bootmode_write(u32 ps_mode);
> int zynqmp_pm_init_finalize(void);
> int zynqmp_pm_set_suspend_mode(u32 mode);
> int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
> @@ -515,6 +519,16 @@ static inline int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
> return -ENODEV;
> }
>
> +static inline unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int zynqmp_pm_bootmode_write(u32 ps_mode)
> +{
> + return -ENODEV;
> +}
> +
> static inline int zynqmp_pm_init_finalize(void)
> {
> return -ENODEV;
>
Acked-by: Michal Simek <michal.simek@xxxxxxxxxx>
Thanks,
Michal
