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From: Ronak Jain <redacted>

Add new APIs in firmware to configure SD/GEM registers. Internally
it calls PM IOCTL for below SD/GEM register configuration:
- SD/EMMC select
- SD slot type
- SD base clock
- SD 8 bit support
- SD fixed config
- GEM SGMII Mode
- GEM fixed config

Signed-off-by: Ronak Jain <redacted>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
---
Changes for v2:
- Use tab indent for zynqmp_pm_set_sd/gem_config return documentation.
---
 drivers/firmware/xilinx/zynqmp.c     | 31 +++++++++++++++++++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 7977a494a651..44c44077dfc5 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c

@@ -1298,6 +1298,37 @@ int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
 }

 /**
+ * zynqmp_pm_set_sd_config - PM call to set value of SD config registers
+ * @node:      SD node ID
+ * @config:    The config type of SD registers
+ * @value:     Value to be set
+ *
+ * Return:     Returns 0 on success or error value on failure.
+ */
+int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
+{
+       return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_SD_CONFIG,
+                                  config, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_config);
+
+/**
+ * zynqmp_pm_set_gem_config - PM call to set value of GEM config registers
+ * @node:      GEM node ID
+ * @config:    The config type of GEM registers
+ * @value:     Value to be set
+ *
+ * Return:     Returns 0 on success or error value on failure.
+ */
+int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
+                            u32 value)
+{
+       return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_GEM_CONFIG,
+                                  config, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_gem_config);
+
+/**
  * struct zynqmp_pm_shutdown_scope - Struct for shutdown scope
  * @subtype:   Shutdown subtype
  * @name:      Matching string for scope argument

diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 1ec73d5352c3..063a93c133f1 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h

@@ -152,6 +152,9 @@ enum pm_ioctl_id {
        /* Runtime feature configuration */
        IOCTL_SET_FEATURE_CONFIG = 26,
        IOCTL_GET_FEATURE_CONFIG = 27,
+       /* Dynamic SD/GEM configuration */
+       IOCTL_SET_SD_CONFIG = 30,
+       IOCTL_SET_GEM_CONFIG = 31,
 };

 enum pm_query_id {

@@ -393,6 +396,18 @@ enum pm_feature_config_id {
        PM_FEATURE_EXTWDT_VALUE = 4,
 };

+enum pm_sd_config_type {
+       SD_CONFIG_EMMC_SEL = 1, /* To set SD_EMMC_SEL in CTRL_REG_SD and SD_SLOTTYPE */
+       SD_CONFIG_BASECLK = 2, /* To set SD_BASECLK in SD_CONFIG_REG1 */
+       SD_CONFIG_8BIT = 3, /* To set SD_8BIT in SD_CONFIG_REG2 */
+       SD_CONFIG_FIXED = 4, /* To set fixed config registers */
+};
+
+enum pm_gem_config_type {
+       GEM_CONFIG_SGMII_MODE = 1, /* To set GEM_SGMII_MODE in GEM_CLK_CTRL register */
+       GEM_CONFIG_FIXED = 2, /* To set fixed config registers */
+};

+
 /**
  * struct zynqmp_pm_query_data - PM query data
  * @qid:       query ID

@@ -468,6 +483,9 @@ int zynqmp_pm_feature(const u32 api_id);
 int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id);
 int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value);
 int zynqmp_pm_get_feature_config(enum pm_feature_config_id id, u32 *payload);
+int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value);
+int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
+                            u32 value);
 #else
 static inline int zynqmp_pm_get_api_version(u32 *version)
 {

@@ -733,6 +751,21 @@ static inline int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
 {
        return -ENODEV;
 }
+
+static inline int zynqmp_pm_set_sd_config(u32 node,
+                                         enum pm_sd_config_type config,
+                                         u32 value)
+{
+       return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_gem_config(u32 node,
+                                          enum pm_gem_config_type config,
+                                          u32 value)
+{
+       return -ENODEV;
+}
+
 #endif

 #endif /* __FIRMWARE_ZYNQMP_H__ */
--

2.1.1