linux-kernel - [PATCH 2/4] firmware: xilinx: Add DLL reset support

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Date:   Tue, 21 Jan 2020 15:51:33 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     michal.simek@...inx.com, adrian.hunter@...el.com,
        ulf.hansson@...aro.org, jolly.shah@...inx.com,
        rajan.vaja@...inx.com, nava.manne@...inx.com,
        manish.narani@...inx.com, tejas.patel@...inx.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org
Subject: [PATCH 2/4] firmware: xilinx: Add DLL reset support

SD DLL resets are required for some of the operations on ZynqMP platform.
Add DLL reset support in ZynqMP firmware driver for SD DLL reset.

Signed-off-by: Manish Narani <manish.narani@...inx.com>
---
 drivers/firmware/xilinx/zynqmp.c     | 1 +
 include/linux/firmware/xlnx-zynqmp.h | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 89eb198cee5e..165ec0f1e10a 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -469,6 +469,7 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
 static inline int zynqmp_is_valid_ioctl(u32 ioctl_id)
 {
 	switch (ioctl_id) {
+	case IOCTL_SD_DLL_RESET:
 	case IOCTL_SET_SD_TAPDELAY:
 	case IOCTL_SET_PLL_FRAC_MODE:
 	case IOCTL_GET_PLL_FRAC_MODE:
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index e41ad9e37136..01a6d972b8a8 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -92,7 +92,8 @@ enum pm_ret_status {
 };
 
 enum pm_ioctl_id {
-	IOCTL_SET_SD_TAPDELAY = 7,
+	IOCTL_SD_DLL_RESET = 6,
+	IOCTL_SET_SD_TAPDELAY,
 	IOCTL_SET_PLL_FRAC_MODE,
 	IOCTL_GET_PLL_FRAC_MODE,
 	IOCTL_SET_PLL_FRAC_DATA,
@@ -262,6 +263,12 @@ enum tap_delay_type {
 	PM_TAPDELAY_OUTPUT,
 };
 
+enum dll_reset_type {
+	PM_DLL_RESET_ASSERT,
+	PM_DLL_RESET_RELEASE,
+	PM_DLL_RESET_PULSE,
+};
+
 /**
  * struct zynqmp_pm_query_data - PM query data
  * @qid:	query ID
-- 
2.17.1