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From:   Nava kishore Manne <nava.manne@xilinx.com>
To:     <robh+dt@kernel.org>, <mark.rutland@arm.com>,
        <michal.simek@xilinx.com>, <p.zabel@pengutronix.de>,
        <nava.manne@xilinx.com>, <rajanv@xilinx.com>, <jollys@xilinx.com>,
        <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
Subject: [RFC PATCH v2 1/3] firmware: xilinx: Add reset API's
Date:   Wed, 5 Sep 2018 12:10:40 +0530
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This Patch Adds reset API's to support release, assert
and status functionalities by using firmware interface.

Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
---
Changes for v2:
		-New Patch.

 drivers/firmware/xilinx/zynqmp.c     |  40 +++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 136 +++++++++++++++++++++++++++++++++++
 2 files changed, 176 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 7ccedf0..639c72f 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -447,6 +447,44 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
 	return ret;
 }
 
+/**
+ * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
+ * @reset:		Reset to be configured
+ * @assert_flag:	Flag stating should reset be asserted (1) or
+ *			released (0)
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
+				  const enum zynqmp_pm_reset_action assert_flag)
+{
+	return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, reset, assert_flag,
+				   0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_reset_get_status - Get status of the reset
+ * @reset:      Reset whose status should be returned
+ * @status:     Returned status
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
+				      u32 *status)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	if (!status)
+		return -EINVAL;
+
+	ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, reset, 0,
+				  0, 0, ret_payload);
+	*status = ret_payload[1];
+
+	return ret;
+}
+
 static const struct zynqmp_eemi_ops eemi_ops = {
 	.get_api_version = zynqmp_pm_get_api_version,
 	.ioctl = zynqmp_pm_ioctl,
@@ -460,6 +498,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
 	.clock_getrate = zynqmp_pm_clock_getrate,
 	.clock_setparent = zynqmp_pm_clock_setparent,
 	.clock_getparent = zynqmp_pm_clock_getparent,
+	.reset_assert = zynqmp_pm_reset_assert,
+	.reset_get_status = zynqmp_pm_reset_get_status,
 };
 
 /**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 58a7478..93decf5 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -34,6 +34,8 @@
 
 enum pm_api_id {
 	PM_GET_API_VERSION = 1,
+	PM_RESET_ASSERT = 17,
+	PM_RESET_GET_STATUS,
 	PM_IOCTL = 34,
 	PM_QUERY_DATA,
 	PM_CLOCK_ENABLE,
@@ -74,6 +76,137 @@ enum pm_query_id {
 	PM_QID_CLOCK_GET_ATTRIBUTES,
 };
 
+enum zynqmp_pm_reset_action {
+	PM_RESET_ACTION_RELEASE,
+	PM_RESET_ACTION_ASSERT,
+	PM_RESET_ACTION_PULSE,
+};
+
+enum zynqmp_pm_reset {
+	ZYNQMP_PM_RESET_START = 999,
+	ZYNQMP_PM_RESET_PCIE_CFG,
+	ZYNQMP_PM_RESET_PCIE_BRIDGE,
+	ZYNQMP_PM_RESET_PCIE_CTRL,
+	ZYNQMP_PM_RESET_DP,
+	ZYNQMP_PM_RESET_SWDT_CRF,
+	ZYNQMP_PM_RESET_AFI_FM5,
+	ZYNQMP_PM_RESET_AFI_FM4,
+	ZYNQMP_PM_RESET_AFI_FM3,
+	ZYNQMP_PM_RESET_AFI_FM2,
+	ZYNQMP_PM_RESET_AFI_FM1,
+	ZYNQMP_PM_RESET_AFI_FM0,
+	ZYNQMP_PM_RESET_GDMA,
+	ZYNQMP_PM_RESET_GPU_PP1,
+	ZYNQMP_PM_RESET_GPU_PP0,
+	ZYNQMP_PM_RESET_GPU,
+	ZYNQMP_PM_RESET_GT,
+	ZYNQMP_PM_RESET_SATA,
+	ZYNQMP_PM_RESET_ACPU3_PWRON,
+	ZYNQMP_PM_RESET_ACPU2_PWRON,
+	ZYNQMP_PM_RESET_ACPU1_PWRON,
+	ZYNQMP_PM_RESET_ACPU0_PWRON,
+	ZYNQMP_PM_RESET_APU_L2,
+	ZYNQMP_PM_RESET_ACPU3,
+	ZYNQMP_PM_RESET_ACPU2,
+	ZYNQMP_PM_RESET_ACPU1,
+	ZYNQMP_PM_RESET_ACPU0,
+	ZYNQMP_PM_RESET_DDR,
+	ZYNQMP_PM_RESET_APM_FPD,
+	ZYNQMP_PM_RESET_SOFT,
+	ZYNQMP_PM_RESET_GEM0,
+	ZYNQMP_PM_RESET_GEM1,
+	ZYNQMP_PM_RESET_GEM2,
+	ZYNQMP_PM_RESET_GEM3,
+	ZYNQMP_PM_RESET_QSPI,
+	ZYNQMP_PM_RESET_UART0,
+	ZYNQMP_PM_RESET_UART1,
+	ZYNQMP_PM_RESET_SPI0,
+	ZYNQMP_PM_RESET_SPI1,
+	ZYNQMP_PM_RESET_SDIO0,
+	ZYNQMP_PM_RESET_SDIO1,
+	ZYNQMP_PM_RESET_CAN0,
+	ZYNQMP_PM_RESET_CAN1,
+	ZYNQMP_PM_RESET_I2C0,
+	ZYNQMP_PM_RESET_I2C1,
+	ZYNQMP_PM_RESET_TTC0,
+	ZYNQMP_PM_RESET_TTC1,
+	ZYNQMP_PM_RESET_TTC2,
+	ZYNQMP_PM_RESET_TTC3,
+	ZYNQMP_PM_RESET_SWDT_CRL,
+	ZYNQMP_PM_RESET_NAND,
+	ZYNQMP_PM_RESET_ADMA,
+	ZYNQMP_PM_RESET_GPIO,
+	ZYNQMP_PM_RESET_IOU_CC,
+	ZYNQMP_PM_RESET_TIMESTAMP,
+	ZYNQMP_PM_RESET_RPU_R50,
+	ZYNQMP_PM_RESET_RPU_R51,
+	ZYNQMP_PM_RESET_RPU_AMBA,
+	ZYNQMP_PM_RESET_OCM,
+	ZYNQMP_PM_RESET_RPU_PGE,
+	ZYNQMP_PM_RESET_USB0_CORERESET,
+	ZYNQMP_PM_RESET_USB1_CORERESET,
+	ZYNQMP_PM_RESET_USB0_HIBERRESET,
+	ZYNQMP_PM_RESET_USB1_HIBERRESET,
+	ZYNQMP_PM_RESET_USB0_APB,
+	ZYNQMP_PM_RESET_USB1_APB,
+	ZYNQMP_PM_RESET_IPI,
+	ZYNQMP_PM_RESET_APM_LPD,
+	ZYNQMP_PM_RESET_RTC,
+	ZYNQMP_PM_RESET_SYSMON,
+	ZYNQMP_PM_RESET_AFI_FM6,
+	ZYNQMP_PM_RESET_LPD_SWDT,
+	ZYNQMP_PM_RESET_FPD,
+	ZYNQMP_PM_RESET_RPU_DBG1,
+	ZYNQMP_PM_RESET_RPU_DBG0,
+	ZYNQMP_PM_RESET_DBG_LPD,
+	ZYNQMP_PM_RESET_DBG_FPD,
+	ZYNQMP_PM_RESET_APLL,
+	ZYNQMP_PM_RESET_DPLL,
+	ZYNQMP_PM_RESET_VPLL,
+	ZYNQMP_PM_RESET_IOPLL,
+	ZYNQMP_PM_RESET_RPLL,
+	ZYNQMP_PM_RESET_GPO3_PL_0,
+	ZYNQMP_PM_RESET_GPO3_PL_1,
+	ZYNQMP_PM_RESET_GPO3_PL_2,
+	ZYNQMP_PM_RESET_GPO3_PL_3,
+	ZYNQMP_PM_RESET_GPO3_PL_4,
+	ZYNQMP_PM_RESET_GPO3_PL_5,
+	ZYNQMP_PM_RESET_GPO3_PL_6,
+	ZYNQMP_PM_RESET_GPO3_PL_7,
+	ZYNQMP_PM_RESET_GPO3_PL_8,
+	ZYNQMP_PM_RESET_GPO3_PL_9,
+	ZYNQMP_PM_RESET_GPO3_PL_10,
+	ZYNQMP_PM_RESET_GPO3_PL_11,
+	ZYNQMP_PM_RESET_GPO3_PL_12,
+	ZYNQMP_PM_RESET_GPO3_PL_13,
+	ZYNQMP_PM_RESET_GPO3_PL_14,
+	ZYNQMP_PM_RESET_GPO3_PL_15,
+	ZYNQMP_PM_RESET_GPO3_PL_16,
+	ZYNQMP_PM_RESET_GPO3_PL_17,
+	ZYNQMP_PM_RESET_GPO3_PL_18,
+	ZYNQMP_PM_RESET_GPO3_PL_19,
+	ZNQMP_PM_RESET_GPO3_PL_20,
+	ZYNQMP_PM_RESET_GPO3_PL_21,
+	ZYNQMP_PM_RESET_GPO3_PL_22,
+	ZYNQMP_PM_RESET_GPO3_PL_23,
+	ZYNQMP_PM_RESET_GPO3_PL_24,
+	ZYNQMP_PM_RESET_GPO3_PL_25,
+	ZYNQMP_PM_RESET_GPO3_PL_26,
+	ZYNQMP_PM_RESET_GPO3_PL_27,
+	ZYNQMP_PM_RESET_GPO3_PL_28,
+	ZYNQMP_PM_RESET_GPO3_PL_29,
+	ZYNQMP_PM_RESET_GPO3_PL_30,
+	ZYNQMP_PM_RESET_GPO3_PL_31,
+	ZYNQMP_PM_RESET_RPU_LS,
+	ZYNQMP_PM_RESET_PS_ONLY,
+	ZYNQMP_PM_RESET_PL,
+	ZYNQMP_PM_RESET_PS_PL0,
+	ZYNQMP_PM_RESET_PS_PL1,
+	ZYNQMP_PM_RESET_PS_PL2,
+	ZYNQMP_PM_RESET_PS_PL3,
+	ZYNQMP_PM_RESET_END
+};
+
 /**
  * struct zynqmp_pm_query_data - PM query data
  * @qid:	query ID
@@ -101,6 +234,9 @@ struct zynqmp_eemi_ops {
 	int (*clock_getrate)(u32 clock_id, u64 *rate);
 	int (*clock_setparent)(u32 clock_id, u32 parent_id);
 	int (*clock_getparent)(u32 clock_id, u32 *parent_id);
+	int (*reset_assert)(const enum zynqmp_pm_reset reset,
+			    const enum zynqmp_pm_reset_action assert_flag);
+	int (*reset_get_status)(const enum zynqmp_pm_reset reset, u32 *status);
 };
 
 #if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)
-- 
2.7.4