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authorJean-Nicolas Graux <jean-nicolas.graux@stericsson.com>2012-10-15 09:47:05 +0200
committerLinus Walleij <linus.walleij@linaro.org>2012-10-28 21:18:33 +0100
commit2249b19f377f02e1ce9159a42cfcce31ce7cdff5 (patch)
treebf358d218fedb3c7b6fdfff22e9da72d3a65260d /drivers/pinctrl/pinctrl-nomadik.c
parentd3cd8d0caaf86e5d67e13f4a1d8626963ad07161 (diff)
downloadop-kernel-dev-2249b19f377f02e1ce9159a42cfcce31ce7cdff5.zip
op-kernel-dev-2249b19f377f02e1ce9159a42cfcce31ce7cdff5.tar.gz
pinctrl/nomadik: debugfs display of other alternate-C functions
In pinctrl debug pins file, enable display of AltCx functions. Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-nomadik.c')
-rw-r--r--drivers/pinctrl/pinctrl-nomadik.c45
1 files changed, 41 insertions, 4 deletions
diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index 984a2ec..f2fd99b 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -671,6 +671,35 @@ int nmk_gpio_set_mode(int gpio, int gpio_mode)
}
EXPORT_SYMBOL(nmk_gpio_set_mode);
+static int nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev, int gpio)
+{
+ int i;
+ u16 reg;
+ u8 bit;
+ struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
+ const struct prcm_gpiocr_altcx_pin_desc *pin_desc;
+ const u16 *gpiocr_regs;
+
+ for (i = 0; i < npct->soc->npins_altcx; i++) {
+ if (npct->soc->altcx_pins[i].pin == gpio)
+ break;
+ }
+ if (i == npct->soc->npins_altcx)
+ return NMK_GPIO_ALT_C;
+
+ pin_desc = npct->soc->altcx_pins + i;
+ gpiocr_regs = npct->soc->prcm_gpiocr_registers;
+ for (i = 0; i < PRCM_IDX_GPIOCR_ALTC_MAX; i++) {
+ if (pin_desc->altcx[i].used == true) {
+ reg = gpiocr_regs[pin_desc->altcx[i].reg_index];
+ bit = pin_desc->altcx[i].control_bit;
+ if (prcmu_read(reg) & BIT(bit))
+ return NMK_GPIO_ALT_C+i+1;
+ }
+ }
+ return NMK_GPIO_ALT_C;
+}
+
int nmk_gpio_get_mode(int gpio)
{
struct nmk_gpio_chip *nmk_chip;
@@ -1059,8 +1088,9 @@ static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
#include <linux/seq_file.h>
-static void nmk_gpio_dbg_show_one(struct seq_file *s, struct gpio_chip *chip,
- unsigned offset, unsigned gpio)
+static void nmk_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev, struct gpio_chip *chip,
+ unsigned offset, unsigned gpio)
{
const char *label = gpiochip_is_requested(chip, offset);
struct nmk_gpio_chip *nmk_chip =
@@ -1074,12 +1104,18 @@ static void nmk_gpio_dbg_show_one(struct seq_file *s, struct gpio_chip *chip,
[NMK_GPIO_ALT_A] = "altA",
[NMK_GPIO_ALT_B] = "altB",
[NMK_GPIO_ALT_C] = "altC",
+ [NMK_GPIO_ALT_C+1] = "altC1",
+ [NMK_GPIO_ALT_C+2] = "altC2",
+ [NMK_GPIO_ALT_C+3] = "altC3",
+ [NMK_GPIO_ALT_C+4] = "altC4",
};
clk_enable(nmk_chip->clk);
is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & bit);
pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
mode = nmk_gpio_get_mode(gpio);
+ if ((mode == NMK_GPIO_ALT_C) && pctldev)
+ mode = nmk_prcm_gpiocr_get_mode(pctldev, gpio);
seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
gpio, label ?: "(none)",
@@ -1123,13 +1159,14 @@ static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
unsigned gpio = chip->base;
for (i = 0; i < chip->ngpio; i++, gpio++) {
- nmk_gpio_dbg_show_one(s, chip, i, gpio);
+ nmk_gpio_dbg_show_one(s, NULL, chip, i, gpio);
seq_printf(s, "\n");
}
}
#else
static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev,
struct gpio_chip *chip,
unsigned offset, unsigned gpio)
{
@@ -1460,7 +1497,7 @@ static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
return;
}
chip = range->gc;
- nmk_gpio_dbg_show_one(s, chip, offset - chip->base, offset);
+ nmk_gpio_dbg_show_one(s, pctldev, chip, offset - chip->base, offset);
}
static struct pinctrl_ops nmk_pinctrl_ops = {
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