Add support for Yoga touch input (rhbz 1275718)

1 files changed, 138 insertions, 0 deletions

diff --git a/0014-mfd-intel-lpss-Pass-SDA-hold-time-to-I2C-host-contro.patch b/0014-mfd-intel-lpss-Pass-SDA-hold-time-to-I2C-host-contro.patch
new file mode 100644
index 000000000..c06105162
--- /dev/null
+++ b/0014-mfd-intel-lpss-Pass-SDA-hold-time-to-I2C-host-contro.patch
@@ -0,0 +1,138 @@
+From 028af5941dd870afd5eb6a95c39f25564dcca79a Mon Sep 17 00:00:00 2001
+From: Mika Westerberg <mika.westerberg@linux.intel.com>
+Date: Mon, 30 Nov 2015 17:11:42 +0200
+Subject: [PATCH 14/16] mfd: intel-lpss: Pass SDA hold time to I2C host
+ controller driver
+
+Intel Skylake the LPSS I2C pad circuit has internal delays that require
+programming non-zero SDA hold time for the I2C host controller. If this is
+not done communication to slave devices may fail with arbitration lost
+errors like the one seen below taken from Lenovo Yoga 900:
+
+  i2c_hid i2c-SYNA2B29:00: Fetching the HID descriptor
+  i2c_hid i2c-SYNA2B29:00: __i2c_hid_command: cmd=20 00
+  i2c_designware i2c_designware.1: i2c_dw_handle_tx_abort: lost arbitration
+
+To fix this we follow what the Windows driver is doing and pass the default
+SDA hold time of 230 ns to all Intel Skylake host controllers. This still
+allows the platform to override these values by passing special ACPI
+methods SSCN and FMCN.
+
+Reported-by: Kevin Fenzi <kevin@scrye.com>
+Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
+Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+---
+ drivers/mfd/intel-lpss-acpi.c | 19 +++++++++++++++++--
+ drivers/mfd/intel-lpss-pci.c  | 31 +++++++++++++++++++++++--------
+ 2 files changed, 40 insertions(+), 10 deletions(-)
+
+diff --git a/drivers/mfd/intel-lpss-acpi.c b/drivers/mfd/intel-lpss-acpi.c
+index b6fd904..06f00d6 100644
+--- a/drivers/mfd/intel-lpss-acpi.c
++++ b/drivers/mfd/intel-lpss-acpi.c
+@@ -18,6 +18,7 @@
+ #include <linux/pm.h>
+ #include <linux/pm_runtime.h>
+ #include <linux/platform_device.h>
++#include <linux/property.h>
+ 
+ #include "intel-lpss.h"
+ 
+@@ -25,6 +26,20 @@ static const struct intel_lpss_platform_info spt_info = {
+ 	.clk_rate = 120000000,
+ };
+ 
++static struct property_entry spt_i2c_properties[] = {
++	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
++	{ },
++};
++
++static struct property_set spt_i2c_pset = {
++	.properties = spt_i2c_properties,
++};
++
++static const struct intel_lpss_platform_info spt_i2c_info = {
++	.clk_rate = 120000000,
++	.pset = &spt_i2c_pset,
++};
++
+ static const struct intel_lpss_platform_info bxt_info = {
+ 	.clk_rate = 100000000,
+ };
+@@ -35,8 +50,8 @@ static const struct intel_lpss_platform_info bxt_i2c_info = {
+ 
+ static const struct acpi_device_id intel_lpss_acpi_ids[] = {
+ 	/* SPT */
+-	{ "INT3446", (kernel_ulong_t)&spt_info },
+-	{ "INT3447", (kernel_ulong_t)&spt_info },
++	{ "INT3446", (kernel_ulong_t)&spt_i2c_info },
++	{ "INT3447", (kernel_ulong_t)&spt_i2c_info },
+ 	/* BXT */
+ 	{ "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
+ 	{ "80860ABC", (kernel_ulong_t)&bxt_info },
+diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c
+index 5bfdfcc..a677480 100644
+--- a/drivers/mfd/intel-lpss-pci.c
++++ b/drivers/mfd/intel-lpss-pci.c
+@@ -17,6 +17,7 @@
+ #include <linux/pci.h>
+ #include <linux/pm.h>
+ #include <linux/pm_runtime.h>
++#include <linux/property.h>
+ 
+ #include "intel-lpss.h"
+ 
+@@ -65,6 +66,20 @@ static const struct intel_lpss_platform_info spt_info = {
+ 	.clk_rate = 120000000,
+ };
+ 
++static struct property_entry spt_i2c_properties[] = {
++	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
++	{ },
++};
++
++static struct property_set spt_i2c_pset = {
++	.properties = spt_i2c_properties,
++};
++
++static const struct intel_lpss_platform_info spt_i2c_info = {
++	.clk_rate = 120000000,
++	.pset = &spt_i2c_pset,
++};
++
+ static const struct intel_lpss_platform_info spt_uart_info = {
+ 	.clk_rate = 120000000,
+ 	.clk_con_id = "baudclk",
+@@ -121,20 +136,20 @@ static const struct pci_device_id intel_lpss_pci_ids[] = {
+ 	{ PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
+ 	{ PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
+ 	{ PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_info },
++	{ PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
+ 	{ PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
+ 	/* SPT-H */
+ 	{ PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
+ 	{ PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
+ 	{ PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
+ 	{ PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_info },
+-	{ PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_info },
++	{ PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
++	{ PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
+ 	{ PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
+ 	{ }
+ };
+-- 
+2.5.0
+