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authorVincent Donnefort <vdonnefort@gmail.com>2014-02-14 18:01:58 +0400
committerLee Jones <lee.jones@linaro.org>2014-03-19 12:58:23 +0400
commit3b9231893e5731e2212645a92f1d3d0776c58e1a (patch)
treeb76f357ab5d09156e4ef837cd6f809f4faca2dc2 /drivers/gpio
parente6540f332447b2fe5c2cd8774890c80f29fe5c75 (diff)
downloadlinux-3b9231893e5731e2212645a92f1d3d0776c58e1a.tar.xz
gpio: ich: Add support for Intel Avoton
This patch adds support for Atom C2000 series (Avoton and Rangeley). And has the following options: - New addresses register. - Caching output levels (see Intel external design spec, table 48-29) - No hardware blink. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-ich.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index bfef20f8ab48..e73c6755a5eb 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -1,5 +1,5 @@
/*
- * Intel ICH6-10, Series 5 and 6 GPIO driver
+ * Intel ICH6-10, Series 5 and 6, Atom C2000 (Avoton/Rangeley) GPIO driver
*
* Copyright (C) 2010 Extreme Engineering Solutions.
*
@@ -55,6 +55,16 @@ static const u8 ichx_reglen[3] = {
0x30, 0x10, 0x10,
};
+static const u8 avoton_regs[4][3] = {
+ {0x00, 0x80, 0x00},
+ {0x04, 0x84, 0x00},
+ {0x08, 0x88, 0x00},
+};
+
+static const u8 avoton_reglen[3] = {
+ 0x10, 0x10, 0x00,
+};
+
#define ICHX_WRITE(val, reg, base_res) outl(val, (reg) + (base_res)->start)
#define ICHX_READ(reg, base_res) inl((reg) + (base_res)->start)
@@ -353,6 +363,17 @@ static struct ichx_desc intel5_desc = {
.reglen = ichx_reglen,
};
+/* Avoton */
+static struct ichx_desc avoton_desc = {
+ /* Avoton has only 59 GPIOs, but we assume the first set of register
+ * (Core) has 32 instead of 31 to keep gpio-ich compliance
+ */
+ .ngpio = 60,
+ .regs = avoton_regs,
+ .reglen = avoton_reglen,
+ .use_outlvl_cache = true,
+};
+
static int ichx_gpio_request_regions(struct resource *res_base,
const char *name, u8 use_gpio)
{
@@ -427,6 +448,9 @@ static int ichx_gpio_probe(struct platform_device *pdev)
case ICH_V10CONS_GPIO:
ichx_priv.desc = &ich10_cons_desc;
break;
+ case AVOTON_GPIO:
+ ichx_priv.desc = &avoton_desc;
+ break;
default:
return -ENODEV;
}