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drivers: soc: xilinx: Add ZynqMP power domain driver

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The zynqmp-genpd driver communicates the usage requirements
for logical power domains / devices to the platform FW.
FW is responsible for choosing appropriate power states,
taking Linux' usage information into account.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Jolly Shah
2019-02-01 14:08:50 -08:00
committed by Michal Simek
parent c1986ac3d4
commit e23d9c6d0d
5 changed files with 347 additions and 0 deletions
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1
drivers/firmware/xilinx/Kconfig
View File

@@ -6,6 +6,7 @@ menu "Zynq MPSoC Firmware Drivers"
config ZYNQMP_FIRMWARE
bool "Enable Xilinx Zynq MPSoC firmware interface"
select MFD_CORE
help
Firmware interface driver is used by different
drivers to communicate with the firmware for

15
drivers/firmware/xilinx/zynqmp.c
View File

@@ -14,6 +14,7 @@
#include <linux/compiler.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
@@ -23,6 +24,12 @@
#include <linux/firmware/xlnx-zynqmp.h>
#include "zynqmp-debug.h"
static const struct mfd_cell firmware_devs[] = {
{
.name = "zynqmp_power_controller",
},
};
/**
* zynqmp_pm_ret_code() - Convert PMU-FW error codes to Linux error codes
* @ret_status: PMUFW return code
@@ -689,11 +696,19 @@ static int zynqmp_firmware_probe(struct platform_device *pdev)
zynqmp_pm_api_debugfs_init();
ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs,
ARRAY_SIZE(firmware_devs), NULL, 0, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to add MFD devices %d\n", ret);
return ret;
}
return of_platform_populate(dev->of_node, NULL, NULL, dev);
}
static int zynqmp_firmware_remove(struct platform_device *pdev)
{
mfd_remove_devices(&pdev->dev);
zynqmp_pm_api_debugfs_exit();
return 0;