linux-kernel - [PATCH v3 5/5] pps: generators: tio: Introduce Intel Elkhart Lake PSE TIO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20250307052231.551737-6-raag.jadav@intel.com>
Date: Fri,  7 Mar 2025 10:52:31 +0530
From: Raag Jadav <raag.jadav@...el.com>
To: lee@...nel.org,
	giometti@...eenne.com,
	gregkh@...uxfoundation.org,
	andriy.shevchenko@...ux.intel.com,
	raymond.tan@...el.com
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Raag Jadav <raag.jadav@...el.com>
Subject: [PATCH v3 5/5] pps: generators: tio: Introduce Intel Elkhart Lake PSE TIO

Add initial support for Intel Elkhart Lake PSE TIO controller.

Signed-off-by: Raag Jadav <raag.jadav@...el.com>
Acked-by: Rodolfo Giometti <giometti@...eenne.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pps/generators/Kconfig       |  2 +-
 drivers/pps/generators/pps_gen_tio.c | 17 ++++++++++++++++-
 drivers/pps/generators/pps_gen_tio.h |  5 +++++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/pps/generators/Kconfig b/drivers/pps/generators/Kconfig
index b3f340ed3163..83aada693ad2 100644
--- a/drivers/pps/generators/Kconfig
+++ b/drivers/pps/generators/Kconfig
@@ -33,7 +33,7 @@ config PPS_GENERATOR_PARPORT
 
 config PPS_GENERATOR_TIO
 	tristate "TIO PPS signal generator"
-	depends on X86 && CPU_SUP_INTEL
+	depends on X86 && CPU_SUP_INTEL && MFD_INTEL_EHL_PSE_GPIO
 	help
 	  If you say yes here you get support for a PPS TIO signal generator
 	  which generates a pulse at a prescribed time based on the system clock.
diff --git a/drivers/pps/generators/pps_gen_tio.c b/drivers/pps/generators/pps_gen_tio.c
index 6e3a4b198259..a2a23cdc2568 100644
--- a/drivers/pps/generators/pps_gen_tio.c
+++ b/drivers/pps/generators/pps_gen_tio.c
@@ -231,6 +231,14 @@ static const struct pps_tio_data pmc_data = {
 	},
 };
 
+static const struct pps_tio_data ehl_pse_data = {
+	.regs = {
+		.ctl = TIOCTL_PSE,
+		.compv = TIOCOMPV_PSE,
+		.ec = TIOEC_PSE,
+	},
+};
+
 static const struct acpi_device_id intel_pmc_tio_acpi_match[] = {
 	{ "INTC1021", (kernel_ulong_t)&pmc_data },
 	{ "INTC1022", (kernel_ulong_t)&pmc_data },
@@ -240,9 +248,16 @@ static const struct acpi_device_id intel_pmc_tio_acpi_match[] = {
 };
 MODULE_DEVICE_TABLE(acpi, intel_pmc_tio_acpi_match);
 
+static const struct platform_device_id pps_gen_tio_ids[] = {
+	{ "pps-gen-tio", (kernel_ulong_t)&ehl_pse_data },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, pps_gen_tio_ids);
+
 static struct platform_driver pps_gen_tio_driver = {
 	.probe          = pps_gen_tio_probe,
 	.remove         = pps_gen_tio_remove,
+	.id_table	= pps_gen_tio_ids,
 	.driver         = {
 		.name                   = "intel-pps-gen-tio",
 		.acpi_match_table       = intel_pmc_tio_acpi_match,
@@ -255,5 +270,5 @@ MODULE_AUTHOR("Lakshmi Sowjanya D <lakshmi.sowjanya.d@...el.com>");
 MODULE_AUTHOR("Pandith N <pandith.n@...el.com>");
 MODULE_AUTHOR("Thejesh Reddy T R <thejesh.reddy.t.r@...el.com>");
 MODULE_AUTHOR("Subramanian Mohan <subramanian.mohan@...el.com>");
-MODULE_DESCRIPTION("Intel PMC Time-Aware IO Generator Driver");
+MODULE_DESCRIPTION("Intel Time-Aware IO Generator Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/pps/generators/pps_gen_tio.h b/drivers/pps/generators/pps_gen_tio.h
index 4329b6dbd598..509bd2633dfb 100644
--- a/drivers/pps/generators/pps_gen_tio.h
+++ b/drivers/pps/generators/pps_gen_tio.h
@@ -18,6 +18,11 @@
 
 struct device;
 
+/* EHL PSE Registers */
+#define TIOCTL_PSE			0x00
+#define TIOCOMPV_PSE			0x04
+#define TIOEC_PSE			0x24
+
 /* PMC Registers */
 #define TIOCTL_PMC			0x00
 #define TIOCOMPV_PMC			0x10
-- 
2.34.1