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Subject[PATCH 2/4] firmware: xilinx: Add DLL reset support
Date
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@xilinx.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
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