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authorJolly Shah <jolly.shah@xilinx.com>2019-02-02 01:08:50 +0300
committerMichal Simek <michal.simek@xilinx.com>2019-02-12 15:38:16 +0300
commite23d9c6d0d4912fab12cd2d56070b0a8199772f0 (patch)
tree69d39c71f30424ee14d13a12cb87ce8edc6c484c /drivers/firmware
parentc1986ac3d483b051fc237aea3e9812fd1bb4d239 (diff)
downloadlinux-e23d9c6d0d4912fab12cd2d56070b0a8199772f0.tar.xz
drivers: soc: xilinx: Add ZynqMP power domain driver
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>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/xilinx/Kconfig1
-rw-r--r--drivers/firmware/xilinx/zynqmp.c15
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/firmware/xilinx/Kconfig b/drivers/firmware/xilinx/Kconfig
index 8f44b9cd295a..bd33bbf70daf 100644
--- a/drivers/firmware/xilinx/Kconfig
+++ b/drivers/firmware/xilinx/Kconfig
@@ -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
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index af5cffd3ac43..98f936125643 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -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;