linux-kernel - [PATCH] gpio: it87: Add support for IT8613

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Date:   Thu,  9 Aug 2018 01:26:36 +0300
From:   Leonid Bloch <lbloch@...ustech.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-gpio@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Leonid Bloch <lbloch@...ustech.com>
Subject: [PATCH] gpio: it87: Add support for IT8613

This was tested on actual hardware and found to work fine, but currently
the official specifications of this chip could not be obtained to
confirm the numbers.

Signed-off-by: Leonid Bloch <lbloch@...ustech.com>
---
 drivers/gpio/Kconfig     | 3 ++-
 drivers/gpio/gpio-it87.c | 9 +++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 71c0ab46f216..f1179599aa7e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -684,7 +684,8 @@ config GPIO_IT87
 	  Say yes here to support GPIO functionality of IT87xx Super I/O chips.
 
 	  This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
-	  supports the IT8761E, IT8620E and IT8628E Super I/O chip as well.
+	  supports the IT8761E, IT8613, IT8620E, and IT8628E Super I/O chips as
+	  well.
 
 	  To compile this driver as a module, choose M here: the module will
 	  be called gpio_it87
diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c
index 7cad14d3f127..b1fe26927e44 100644
--- a/drivers/gpio/gpio-it87.c
+++ b/drivers/gpio/gpio-it87.c
@@ -35,6 +35,7 @@
 
 /* Chip Id numbers */
 #define NO_DEV_ID	0xffff
+#define IT8613_ID	0x8613
 #define IT8620_ID	0x8620
 #define IT8628_ID	0x8628
 #define IT8728_ID	0x8728
@@ -306,6 +307,14 @@ static int __init it87_gpio_init(void)
 	it87_gpio->chip = it87_template_chip;
 
 	switch (chip_type) {
+	case IT8613_ID:
+		gpio_ba_reg = 0x62;
+		it87_gpio->io_size = 8;  /* it8613 only needs 6, use 8 for alignment */
+		it87_gpio->output_base = 0xc8;
+		it87_gpio->simple_base = 0xc0;
+		it87_gpio->simple_size = 6;
+		it87_gpio->chip.ngpio = 64;  /* has 48, use 64 for convenient calc */
+		break;
 	case IT8620_ID:
 	case IT8628_ID:
 		gpio_ba_reg = 0x62;
-- 
2.17.1