Commit 23c64d76 authored by Piyush Mehta's avatar Piyush Mehta Committed by Bartosz Golaszewski
Browse files

firmware: zynqmp: Add MMIO read and write support for PS_MODE pin 



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: default avatarPiyush Mehta <piyush.mehta@xilinx.com>
Acked-by: default avatarMichal Simek <michal.simek@xilinx.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
parent 03e2080d

drivers/firmware/xilinx/zynqmp.c

+46 −0
Original line number Diff line number Diff line
@@ -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);
@@ -925,6 +932,45 @@ 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

include/linux/firmware/xlnx-zynqmp.h

+14 −0
Original line number Diff line number Diff line
@@ -72,6 +72,8 @@ 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,
@@ -390,6 +392,8 @@ 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,
@@ -520,6 +524,16 @@ 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;