Commit fa989ae7 authored by Sai Krishna Potthuri's avatar Sai Krishna Potthuri Committed by Linus Walleij
Browse files

firmware: xilinx: Add pinctrl support 



Adding pinctrl support to query platform specific information (pins)
from firmware.

Signed-off-by: default avatarSai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Acked-by: default avatarMichal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/1619080202-31924-2-git-send-email-lakshmi.sai.krishna.potthuri@xilinx.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent fe202ea8

drivers/firmware/xilinx/zynqmp.c

+114 −0
Original line number Diff line number Diff line
@@ -811,6 +811,120 @@ int zynqmp_pm_fpga_get_status(u32 *value) 
}

EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);



/**

 * zynqmp_pm_pinctrl_request - Request Pin from firmware

 * @pin: Pin number to request

 *

 * This function requests pin from firmware.

 *

 * Return: Returns status, either success or error+reason.

 */

int zynqmp_pm_pinctrl_request(const u32 pin)

{

	return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request);



/**

 * zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released

 * @pin: Pin number to release

 *

 * This function release pin from firmware.

 *

 * Return: Returns status, either success or error+reason.

 */

int zynqmp_pm_pinctrl_release(const u32 pin)

{

	return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, pin, 0, 0, 0, NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release);



/**

 * zynqmp_pm_pinctrl_get_function - Read function id set for the given pin

 * @pin: Pin number

 * @id: Buffer to store function ID

 *

 * This function provides the function currently set for the given pin.

 *

 * Return: Returns status, either success or error+reason

 */

int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id)

{

	u32 ret_payload[PAYLOAD_ARG_CNT];

	int ret;



	if (!id)

		return -EINVAL;



	ret = zynqmp_pm_invoke_fn(PM_PINCTRL_GET_FUNCTION, pin, 0,

				  0, 0, ret_payload);

	*id = ret_payload[1];



	return ret;

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_function);



/**

 * zynqmp_pm_pinctrl_set_function - Set requested function for the pin

 * @pin: Pin number

 * @id: Function ID to set

 *

 * This function sets requested function for the given pin.

 *

 * Return: Returns status, either success or error+reason.

 */

int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)

{

	return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, pin, id,

				   0, 0, NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function);



/**

 * zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin

 * @pin: Pin number

 * @param: Parameter to get

 * @value: Buffer to store parameter value

 *

 * This function gets requested configuration parameter for the given pin.

 *

 * Return: Returns status, either success or error+reason.

 */

int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,

				 u32 *value)

{

	u32 ret_payload[PAYLOAD_ARG_CNT];

	int ret;



	if (!value)

		return -EINVAL;



	ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, pin, param,

				  0, 0, ret_payload);

	*value = ret_payload[1];



	return ret;

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config);



/**

 * zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin

 * @pin: Pin number

 * @param: Parameter to set

 * @value: Parameter value to set

 *

 * This function sets requested configuration parameter for the given pin.

 *

 * Return: Returns status, either success or error+reason.

 */

int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,

				 u32 value)

{

	return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin,

				   param, value, 0, NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config);



/**

 * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller

 *			       master has initialized its own power management

include/linux/firmware/xlnx-zynqmp.h

+90 −0
Original line number Diff line number Diff line
@@ -72,6 +72,12 @@ enum pm_api_id { 
	PM_FPGA_LOAD = 22,

	PM_FPGA_GET_STATUS = 23,

	PM_GET_CHIPID = 24,

	PM_PINCTRL_REQUEST = 28,

	PM_PINCTRL_RELEASE = 29,

	PM_PINCTRL_GET_FUNCTION = 30,

	PM_PINCTRL_SET_FUNCTION = 31,

	PM_PINCTRL_CONFIG_PARAM_GET = 32,

	PM_PINCTRL_CONFIG_PARAM_SET = 33,

	PM_IOCTL = 34,

	PM_QUERY_DATA = 35,

	PM_CLOCK_ENABLE = 36,
@@ -122,6 +128,12 @@ enum pm_query_id { 
	PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS = 3,

	PM_QID_CLOCK_GET_PARENTS = 4,

	PM_QID_CLOCK_GET_ATTRIBUTES = 5,

	PM_QID_PINCTRL_GET_NUM_PINS = 6,

	PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,

	PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,

	PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,

	PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,

	PM_QID_PINCTRL_GET_PIN_GROUPS = 11,

	PM_QID_CLOCK_GET_NUM_CLOCKS = 12,

	PM_QID_CLOCK_GET_MAX_DIVISOR = 13,

};
@@ -285,6 +297,44 @@ enum dll_reset_type { 
	PM_DLL_RESET_PULSE = 2,

};



enum pm_pinctrl_config_param {

	PM_PINCTRL_CONFIG_SLEW_RATE = 0,

	PM_PINCTRL_CONFIG_BIAS_STATUS = 1,

	PM_PINCTRL_CONFIG_PULL_CTRL = 2,

	PM_PINCTRL_CONFIG_SCHMITT_CMOS = 3,

	PM_PINCTRL_CONFIG_DRIVE_STRENGTH = 4,

	PM_PINCTRL_CONFIG_VOLTAGE_STATUS = 5,

	PM_PINCTRL_CONFIG_TRI_STATE = 6,

	PM_PINCTRL_CONFIG_MAX = 7,

};



enum pm_pinctrl_slew_rate {

	PM_PINCTRL_SLEW_RATE_FAST = 0,

	PM_PINCTRL_SLEW_RATE_SLOW = 1,

};



enum pm_pinctrl_bias_status {

	PM_PINCTRL_BIAS_DISABLE = 0,

	PM_PINCTRL_BIAS_ENABLE = 1,

};



enum pm_pinctrl_pull_ctrl {

	PM_PINCTRL_BIAS_PULL_DOWN = 0,

	PM_PINCTRL_BIAS_PULL_UP = 1,

};



enum pm_pinctrl_schmitt_cmos {

	PM_PINCTRL_INPUT_TYPE_CMOS = 0,

	PM_PINCTRL_INPUT_TYPE_SCHMITT = 1,

};



enum pm_pinctrl_drive_strength {

	PM_PINCTRL_DRIVE_STRENGTH_2MA = 0,

	PM_PINCTRL_DRIVE_STRENGTH_4MA = 1,

	PM_PINCTRL_DRIVE_STRENGTH_8MA = 2,

	PM_PINCTRL_DRIVE_STRENGTH_12MA = 3,

};



enum zynqmp_pm_shutdown_type {

	ZYNQMP_PM_SHUTDOWN_TYPE_SHUTDOWN = 0,

	ZYNQMP_PM_SHUTDOWN_TYPE_RESET = 1,
@@ -353,6 +403,14 @@ int zynqmp_pm_write_pggs(u32 index, u32 value); 
int zynqmp_pm_read_pggs(u32 index, u32 *value);

int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);

int zynqmp_pm_set_boot_health_status(u32 value);

int zynqmp_pm_pinctrl_request(const u32 pin);

int zynqmp_pm_pinctrl_release(const u32 pin);

int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id);

int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id);

int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,

				 u32 *value);

int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,

				 u32 value);

#else

static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)

{
@@ -537,6 +595,38 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value) 
{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_request(const u32 pin)

{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_release(const u32 pin)

{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id)

{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)

{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,

					       u32 *value)

{

	return -ENODEV;

}



static inline int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,

					       u32 value)

{

	return -ENODEV;

}

#endif



#endif /* __FIRMWARE_ZYNQMP_H__ */