firmware: xilinx: Add APIs to read/write GGS/PGGS registers

Add APIs to read/write PGGS and GGS registers.

Rajan Vaja committed 6 years ago

Commit 4f680b71 parent 4db81802 files · +90 −0Browse files

Unified · Split

2 files

drivers/firmware/xilinx/zynqmp.c +66 −0
include/linux/firmware/xlnx-zynqmp.h +24 −0

@@ -617,6 +617,72 @@ int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type) · 616 unmodified lines
617	617	}
618	618	EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);
619	619
	620	+/**
	621	+ * zynqmp_pm_write_ggs() - PM API for writing global general storage (ggs)
	622	+ * @index GGS register index
	623	+ * @value Register value to be written
	624	+ *
	625	+ * This function writes value to GGS register.
	626	+ *
	627	+ * @return Returns status, either success or error+reason
	628	+ */
	629	+int zynqmp_pm_write_ggs(u32 index, u32 value)
	630	+{
	631	+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_GGS,
	632	+ index, value, NULL);
	633	+}
	634	+EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);
	635	+
	636	+/**
	637	+ * zynqmp_pm_write_ggs() - PM API for reading global general storage (ggs)
	638	+ * @index GGS register index
	639	+ * @value Register value to be written
	640	+ *
	641	+ * This function returns GGS register value.
	642	+ *
	643	+ * @return Returns status, either success or error+reason
	644	+ */
	645	+int zynqmp_pm_read_ggs(u32 index, u32 *value)
	646	+{
	647	+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_GGS,
	648	+ index, 0, value);
	649	+}
	650	+EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);
	651	+
	652	+/**
	653	+ * zynqmp_pm_write_pggs() - PM API for writing persistent global general
	654	+ * storage (pggs)
	655	+ * @index PGGS register index
	656	+ * @value Register value to be written
	657	+ *
	658	+ * This function writes value to PGGS register.
	659	+ *
	660	+ * @return Returns status, either success or error+reason
	661	+ */
	662	+int zynqmp_pm_write_pggs(u32 index, u32 value)
	663	+{
	664	+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_PGGS, index, value,
	665	+ NULL);
	666	+}
	667	+EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);
	668	+
	669	+/**
	670	+ * zynqmp_pm_write_pggs() - PM API for reading persistent global general
	671	+ * storage (pggs)
	672	+ * @index PGGS register index
	673	+ * @value Register value to be written
	674	+ *
	675	+ * This function returns PGGS register value.
	676	+ *
	677	+ * @return Returns status, either success or error+reason
	678	+ */
	679	+int zynqmp_pm_read_pggs(u32 index, u32 *value)
	680	+{
	681	+ return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_PGGS, index, 0,
	682	+ value);
	683	+}
	684	+EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
	685	+
620	686	/**
621	687	* zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
622	688	* @reset: Reset to be configured

include/linux/firmware/xlnx-zynqmp.h+24−0

@@ -107,6 +107,10 @@ enum pm_ioctl_id { · 106 unmodified lines
107	107	IOCTL_GET_PLL_FRAC_MODE,
108	108	IOCTL_SET_PLL_FRAC_DATA,
109	109	IOCTL_GET_PLL_FRAC_DATA,
	110	+ IOCTL_WRITE_GGS = 12,
	111	+ IOCTL_READ_GGS = 13,
	112	+ IOCTL_WRITE_PGGS = 14,
	113	+ IOCTL_READ_PGGS = 15,
110	114	};
111	115
112	116	enum pm_query_id {
@@ -330,6 +334,10 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities, · 217 unmodified lines
330	334	int zynqmp_pm_aes_engine(const u64 address, u32 *out);
331	335	int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags);
332	336	int zynqmp_pm_fpga_get_status(u32 *value);
	337	+int zynqmp_pm_write_ggs(u32 index, u32 value);
	338	+int zynqmp_pm_read_ggs(u32 index, u32 *value);
	339	+int zynqmp_pm_write_pggs(u32 index, u32 value);
	340	+int zynqmp_pm_read_pggs(u32 index, u32 *value);
333	341	#else
334	342	static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
335	343	{
@@ -456,6 +464,22 @@ static inline int zynqmp_pm_fpga_get_status(u32 *value) · 120 unmodified lines
456	464	{
457	465	return -ENODEV;
458	466	}
	467	+static inline int zynqmp_pm_write_ggs(u32 index, u32 value)
	468	+{
	469	+ return -ENODEV;
	470	+}
	471	+static inline int zynqmp_pm_read_ggs(u32 index, u32 *value)
	472	+{
	473	+ return -ENODEV;
	474	+}
	475	+static inline int zynqmp_pm_write_pggs(u32 index, u32 value)
	476	+{
	477	+ return -ENODEV;
	478	+}
	479	+static inline int zynqmp_pm_read_pggs(u32 index, u32 *value)
	480	+{
	481	+ return -ENODEV;
	482	+}
459	483	#endif
460	484
461	485	#endif /* __FIRMWARE_ZYNQMP_H__ */