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authorRabin Vincent <rabin@rab.in>2015-07-22 16:05:19 +0300
committerLinus Walleij <linus.walleij@linaro.org>2015-07-27 16:02:23 +0300
commitd705073cdafa75286970dd30f722d0df584bae54 (patch)
treeb36f1c8bf1cf60fe916131b0a13d7fbf6ce28601 /drivers/gpio/gpio-etraxfs.c
parent91492a44b998cf762150de8f1b40bda1902e8ea7 (diff)
downloadlinux-d705073cdafa75286970dd30f722d0df584bae54.tar.xz
gpio: etraxfs: add support for ARTPEC-3
Add support for the GIO block in the ARTPEC-3 SoC. The basic functionality is essentialy the same as the version in the ETRAX FS, except for a different set of ports, including a read-only port. Cc: devicetree@vger.kernel.org Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-etraxfs.c')
-rw-r--r--drivers/gpio/gpio-etraxfs.c66
1 files changed, 60 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-etraxfs.c b/drivers/gpio/gpio-etraxfs.c
index 625a9ed411da..27e5d8855205 100644
--- a/drivers/gpio/gpio-etraxfs.c
+++ b/drivers/gpio/gpio-etraxfs.c
@@ -26,6 +26,17 @@
#define ETRAX_FS_r_pe_din 84
#define ETRAX_FS_rw_pe_oe 88
+#define ARTPEC3_r_pa_din 0
+#define ARTPEC3_rw_pa_dout 4
+#define ARTPEC3_rw_pa_oe 8
+#define ARTPEC3_r_pb_din 44
+#define ARTPEC3_rw_pb_dout 48
+#define ARTPEC3_rw_pb_oe 52
+#define ARTPEC3_r_pc_din 88
+#define ARTPEC3_rw_pc_dout 92
+#define ARTPEC3_rw_pc_oe 96
+#define ARTPEC3_r_pd_din 116
+
struct etraxfs_gpio_port {
const char *label;
unsigned int oe;
@@ -82,6 +93,40 @@ static const struct etraxfs_gpio_info etraxfs_gpio_etraxfs = {
.ports = etraxfs_gpio_etraxfs_ports,
};
+static const struct etraxfs_gpio_port etraxfs_gpio_artpec3_ports[] = {
+ {
+ .label = "A",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pa_oe,
+ .dout = ARTPEC3_rw_pa_dout,
+ .din = ARTPEC3_r_pa_din,
+ },
+ {
+ .label = "B",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pb_oe,
+ .dout = ARTPEC3_rw_pb_dout,
+ .din = ARTPEC3_r_pb_din,
+ },
+ {
+ .label = "C",
+ .ngpio = 16,
+ .oe = ARTPEC3_rw_pc_oe,
+ .dout = ARTPEC3_rw_pc_dout,
+ .din = ARTPEC3_r_pc_din,
+ },
+ {
+ .label = "D",
+ .ngpio = 32,
+ .din = ARTPEC3_r_pd_din,
+ },
+};
+
+static const struct etraxfs_gpio_info etraxfs_gpio_artpec3 = {
+ .num_ports = ARRAY_SIZE(etraxfs_gpio_artpec3_ports),
+ .ports = etraxfs_gpio_artpec3_ports,
+};
+
static int etraxfs_gpio_of_xlate(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec,
u32 *flags)
@@ -101,6 +146,10 @@ static const struct of_device_id etraxfs_gpio_of_table[] = {
.compatible = "axis,etraxfs-gio",
.data = &etraxfs_gpio_etraxfs,
},
+ {
+ .compatible = "axis,artpec3-gio",
+ .data = &etraxfs_gpio_artpec3,
+ },
{},
};
@@ -133,14 +182,19 @@ static int etraxfs_gpio_probe(struct platform_device *pdev)
for (i = 0; i < info->num_ports; i++) {
struct bgpio_chip *bgc = &chips[i];
const struct etraxfs_gpio_port *port = &info->ports[i];
+ unsigned long flags = BGPIOF_READ_OUTPUT_REG_SET;
+ void __iomem *dat = regs + port->din;
+ void __iomem *set = regs + port->dout;
+ void __iomem *dirout = regs + port->oe;
+
+ if (dirout == set) {
+ dirout = set = NULL;
+ flags = BGPIOF_NO_OUTPUT;
+ }
ret = bgpio_init(bgc, dev, 4,
- regs + port->din, /* dat */
- regs + port->dout, /* set */
- NULL, /* clr */
- regs + port->oe, /* dirout */
- NULL, /* dirin */
- BGPIOF_READ_OUTPUT_REG_SET);
+ dat, set, NULL, dirout, NULL,
+ flags);
if (ret)
return ret;