summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/spear/pinctrl-spear.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pinctrl/spear/pinctrl-spear.c')
-rw-r--r--drivers/pinctrl/spear/pinctrl-spear.c131
1 files changed, 102 insertions, 29 deletions
diff --git a/drivers/pinctrl/spear/pinctrl-spear.c b/drivers/pinctrl/spear/pinctrl-spear.c
index b1fd6ee33c6c..bf78eb7f85c4 100644
--- a/drivers/pinctrl/spear/pinctrl-spear.c
+++ b/drivers/pinctrl/spear/pinctrl-spear.c
@@ -14,10 +14,10 @@
*/
#include <linux/err.h>
-#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_gpio.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
@@ -28,14 +28,26 @@
#define DRIVER_NAME "spear-pinmux"
-static inline u32 pmx_readl(struct spear_pmx *pmx, u32 reg)
+static void muxregs_endisable(struct spear_pmx *pmx,
+ struct spear_muxreg *muxregs, u8 count, bool enable)
{
- return readl_relaxed(pmx->vbase + reg);
-}
+ struct spear_muxreg *muxreg;
+ u32 val, temp, j;
-static inline void pmx_writel(struct spear_pmx *pmx, u32 val, u32 reg)
-{
- writel_relaxed(val, pmx->vbase + reg);
+ for (j = 0; j < count; j++) {
+ muxreg = &muxregs[j];
+
+ val = pmx_readl(pmx, muxreg->reg);
+ val &= ~muxreg->mask;
+
+ if (enable)
+ temp = muxreg->val;
+ else
+ temp = ~muxreg->val;
+
+ val |= muxreg->mask & temp;
+ pmx_writel(pmx, val, muxreg->reg);
+ }
}
static int set_mode(struct spear_pmx *pmx, int mode)
@@ -70,6 +82,17 @@ static int set_mode(struct spear_pmx *pmx, int mode)
return 0;
}
+void __devinit
+pmx_init_gpio_pingroup_addr(struct spear_gpio_pingroup *gpio_pingroup,
+ unsigned count, u16 reg)
+{
+ int i, j;
+
+ for (i = 0; i < count; i++)
+ for (j = 0; j < gpio_pingroup[i].nmuxregs; j++)
+ gpio_pingroup[i].muxregs[j].reg = reg;
+}
+
void __devinit pmx_init_addr(struct spear_pinctrl_machdata *machdata, u16 reg)
{
struct spear_pingroup *pgroup;
@@ -121,9 +144,10 @@ static void spear_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
seq_printf(s, " " DRIVER_NAME);
}
-int spear_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
- struct device_node *np_config,
- struct pinctrl_map **map, unsigned *num_maps)
+static int spear_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map,
+ unsigned *num_maps)
{
struct spear_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
struct device_node *np;
@@ -168,8 +192,9 @@ int spear_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
return 0;
}
-void spear_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
- struct pinctrl_map *map, unsigned num_maps)
+static void spear_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map,
+ unsigned num_maps)
{
kfree(map);
}
@@ -216,9 +241,7 @@ static int spear_pinctrl_endisable(struct pinctrl_dev *pctldev,
struct spear_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
const struct spear_pingroup *pgroup;
const struct spear_modemux *modemux;
- struct spear_muxreg *muxreg;
- u32 val, temp;
- int i, j;
+ int i;
bool found = false;
pgroup = pmx->machdata->groups[group];
@@ -233,20 +256,8 @@ static int spear_pinctrl_endisable(struct pinctrl_dev *pctldev,
}
found = true;
- for (j = 0; j < modemux->nmuxregs; j++) {
- muxreg = &modemux->muxregs[j];
-
- val = pmx_readl(pmx, muxreg->reg);
- val &= ~muxreg->mask;
-
- if (enable)
- temp = muxreg->val;
- else
- temp = ~muxreg->val;
-
- val |= muxreg->mask & temp;
- pmx_writel(pmx, val, muxreg->reg);
- }
+ muxregs_endisable(pmx, modemux->muxregs, modemux->nmuxregs,
+ enable);
}
if (!found) {
@@ -270,12 +281,74 @@ static void spear_pinctrl_disable(struct pinctrl_dev *pctldev,
spear_pinctrl_endisable(pctldev, function, group, false);
}
+/* gpio with pinmux */
+static struct spear_gpio_pingroup *get_gpio_pingroup(struct spear_pmx *pmx,
+ unsigned pin)
+{
+ struct spear_gpio_pingroup *gpio_pingroup;
+ int i, j;
+
+ if (!pmx->machdata->gpio_pingroups)
+ return NULL;
+
+ for (i = 0; i < pmx->machdata->ngpio_pingroups; i++) {
+ gpio_pingroup = &pmx->machdata->gpio_pingroups[i];
+
+ for (j = 0; j < gpio_pingroup->npins; j++) {
+ if (gpio_pingroup->pins[j] == pin)
+ return gpio_pingroup;
+ }
+ }
+
+ return NULL;
+}
+
+static int gpio_request_endisable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset, bool enable)
+{
+ struct spear_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct spear_pinctrl_machdata *machdata = pmx->machdata;
+ struct spear_gpio_pingroup *gpio_pingroup;
+
+ /*
+ * Some SoC have configuration options applicable to group of pins,
+ * rather than a single pin.
+ */
+ gpio_pingroup = get_gpio_pingroup(pmx, offset);
+ if (gpio_pingroup)
+ muxregs_endisable(pmx, gpio_pingroup->muxregs,
+ gpio_pingroup->nmuxregs, enable);
+
+ /*
+ * SoC may need some extra configurations, or configurations for single
+ * pin
+ */
+ if (machdata->gpio_request_endisable)
+ machdata->gpio_request_endisable(pmx, offset, enable);
+
+ return 0;
+}
+
+static int gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset)
+{
+ return gpio_request_endisable(pctldev, range, offset, true);
+}
+
+static void gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset)
+{
+ gpio_request_endisable(pctldev, range, offset, false);
+}
+
static struct pinmux_ops spear_pinmux_ops = {
.get_functions_count = spear_pinctrl_get_funcs_count,
.get_function_name = spear_pinctrl_get_func_name,
.get_function_groups = spear_pinctrl_get_func_groups,
.enable = spear_pinctrl_enable,
.disable = spear_pinctrl_disable,
+ .gpio_request_enable = gpio_request_enable,
+ .gpio_disable_free = gpio_disable_free,
};
static struct pinctrl_desc spear_pinctrl_desc = {