From: Jolly Shah <jolly.shah@xilinx.com>
To: ard.biesheuvel@linaro.org, mingo@kernel.org,
gregkh@linuxfoundation.org, matt@codeblueprint.co.uk,
sudeep.holla@arm.com, hkallweit1@gmail.com,
keescook@chromium.org, dmitry.torokhov@gmail.com,
michal.simek@xilinx.com
Cc: Jolly Shah <jolly.shah@xilinx.com>,
Rajan Vaja <rajan.vaja@xilinx.com>,
rajanv@xilinx.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 21/25] firmware: xilinx: Add APIs to read/write GGS/PGGS registers
Date: Thu, 9 Apr 2020 12:12:10 -0700 [thread overview]
Message-ID: <1586459534-8997-22-git-send-email-jolly.shah@xilinx.com> (raw)
In-Reply-To: <1586459534-8997-1-git-send-email-jolly.shah@xilinx.com>
From: Rajan Vaja <rajan.vaja@xilinx.com>
Add APIs to read/write PGGS and GGS registers.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
---
drivers/firmware/xilinx/zynqmp.c | 66 ++++++++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 24 +++++++++++++
2 files changed, 90 insertions(+)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index ef7ba32..3518456 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -618,6 +618,72 @@ int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type)
EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);
/**
+ * zynqmp_pm_write_ggs() - PM API for writing global general storage (ggs)
+ * @index GGS register index
+ * @value Register value to be written
+ *
+ * This function writes value to GGS register.
+ *
+ * @return Returns status, either success or error+reason
+ */
+int zynqmp_pm_write_ggs(u32 index, u32 value)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_GGS,
+ index, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);
+
+/**
+ * zynqmp_pm_write_ggs() - PM API for reading global general storage (ggs)
+ * @index GGS register index
+ * @value Register value to be written
+ *
+ * This function returns GGS register value.
+ *
+ * @return Returns status, either success or error+reason
+ */
+int zynqmp_pm_read_ggs(u32 index, u32 *value)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_GGS,
+ index, 0, value);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);
+
+/**
+ * zynqmp_pm_write_pggs() - PM API for writing persistent global general
+ * storage (pggs)
+ * @index PGGS register index
+ * @value Register value to be written
+ *
+ * This function writes value to PGGS register.
+ *
+ * @return Returns status, either success or error+reason
+ */
+int zynqmp_pm_write_pggs(u32 index, u32 value)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_PGGS, index, value,
+ NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);
+
+/**
+ * zynqmp_pm_write_pggs() - PM API for reading persistent global general
+ * storage (pggs)
+ * @index PGGS register index
+ * @value Register value to be written
+ *
+ * This function returns PGGS register value.
+ *
+ * @return Returns status, either success or error+reason
+ */
+int zynqmp_pm_read_pggs(u32 index, u32 *value)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_PGGS, index, 0,
+ value);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
+
+/**
* 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
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 44ffb4f..e23251d 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -107,6 +107,10 @@ enum pm_ioctl_id {
IOCTL_GET_PLL_FRAC_MODE,
IOCTL_SET_PLL_FRAC_DATA,
IOCTL_GET_PLL_FRAC_DATA,
+ IOCTL_WRITE_GGS = 12,
+ IOCTL_READ_GGS = 13,
+ IOCTL_WRITE_PGGS = 14,
+ IOCTL_READ_PGGS = 15,
};
enum pm_query_id {
@@ -330,6 +334,10 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
int zynqmp_pm_aes_engine(const u64 address, u32 *out);
int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags);
int zynqmp_pm_fpga_get_status(u32 *value);
+int zynqmp_pm_write_ggs(u32 index, u32 value);
+int zynqmp_pm_read_ggs(u32 index, u32 *value);
+int zynqmp_pm_write_pggs(u32 index, u32 value);
+int zynqmp_pm_read_pggs(u32 index, u32 *value);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@@ -456,6 +464,22 @@ static inline int zynqmp_pm_fpga_get_status(u32 *value)
{
return -ENODEV;
}
+static inline int zynqmp_pm_write_ggs(u32 index, u32 value)
+{
+ return -ENODEV;
+}
+static inline int zynqmp_pm_read_ggs(u32 index, u32 *value)
+{
+ return -ENODEV;
+}
+static inline int zynqmp_pm_write_pggs(u32 index, u32 value)
+{
+ return -ENODEV;
+}
+static inline int zynqmp_pm_read_pggs(u32 index, u32 *value)
+{
+ return -ENODEV;
+}
#endif
#endif /* __FIRMWARE_ZYNQMP_H__ */
--
2.7.4
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next prev parent reply other threads:[~2020-04-09 19:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-09 19:11 [PATCH v4 00/25] firmware: xilinx: Add xilinx specific sysfs interface Jolly Shah
2020-04-09 19:11 ` [PATCH v4 01/25] firmware: xilinx: Remove eemi ops for get_api_version Jolly Shah
2020-04-09 19:11 ` [PATCH v4 02/25] firmware: xilinx: Remove eemi ops for get_chipid Jolly Shah
2020-04-09 19:11 ` [PATCH v4 03/25] firmware: xilinx: Remove eemi ops for query_data Jolly Shah
2020-04-09 19:11 ` [PATCH v4 04/25] firmware: xilinx: Remove eemi ops for clock_enable Jolly Shah
2020-04-09 19:11 ` [PATCH v4 05/25] firmware: xilinx: Remove eemi ops for clock_disable Jolly Shah
2020-04-09 19:11 ` [PATCH v4 06/25] firmware: xilinx: Remove eemi ops for clock_getstate Jolly Shah
2020-04-09 19:11 ` [PATCH v4 07/25] firmware: xilinx: Remove eemi ops for clock_setdivider Jolly Shah
2020-04-09 19:11 ` [PATCH v4 08/25] firmware: xilinx: Remove eemi ops for clock_getdivider Jolly Shah
2020-04-09 19:11 ` [PATCH v4 09/25] firmware: xilinx: Remove eemi ops for clock set/get rate Jolly Shah
2020-04-09 19:11 ` [PATCH v4 10/25] firmware: xilinx: Remove eemi ops for clock set/get parent Jolly Shah
2020-04-09 19:12 ` [PATCH v4 11/25] firmware: xilinx: Use APIs instead of IOCTLs Jolly Shah
2020-04-09 19:12 ` [PATCH v4 12/25] firmware: xilinx: Remove eemi ops for reset_assert Jolly Shah
2020-04-09 19:12 ` [PATCH v4 13/25] firmware: xilinx: Remove eemi ops for reset_get_status Jolly Shah
2020-04-09 19:12 ` [PATCH v4 14/25] firmware: xilinx: Remove eemi ops for init_finalize Jolly Shah
2020-04-09 19:12 ` [PATCH v4 15/25] firmware: xilinx: Remove eemi ops for set_suspend_mode Jolly Shah
2020-04-09 19:12 ` [PATCH v4 16/25] firmware: xilinx: Remove eemi ops for request_node Jolly Shah
2020-04-09 19:12 ` [PATCH v4 17/25] firmware: xilinx: Remove eemi ops for release_node Jolly Shah
2020-04-09 19:12 ` [PATCH v4 18/25] firmware: xilinx: Remove eemi ops for set_requirement Jolly Shah
2020-04-09 19:12 ` [PATCH v4 19/25] firmware: xilinx: Remove eemi ops for aes engine Jolly Shah
2020-04-09 19:12 ` [PATCH v4 20/25] firmware: xilinx: Remove eemi ops for fpga related APIs Jolly Shah
2020-04-09 19:12 ` Jolly Shah [this message]
2020-04-09 19:12 ` [PATCH v4 22/25] firmware: xilinx: Add sysfs interface Jolly Shah
2020-04-09 19:12 ` [PATCH v4 23/25] firmware: xilinx: Add system shutdown API interface Jolly Shah
2020-04-09 19:12 ` [PATCH v4 24/25] firmware: xilinx: Add sysfs to set shutdown scope Jolly Shah
2020-04-09 19:12 ` [PATCH v4 25/25] firmware: xilinx: Add sysfs and API to set boot health status Jolly Shah
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