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pinctrl: imx: detect uninitialized pins 

The pinctrl driver initialized the register offsets for the pins
with 0. On Vybrid an offset of 0 is a valid offset for the pinctrl
mux register. So far, this was solved using the ZERO_OFFSET_VALID
flag which allowed offsets of 0. However, this does not allow to
verify whether a pins struct imx_pmx_func was initialized or not.

Use signed offset values for register offsets and initialize those
with -1 in order to detect uninitialized offset values reliable.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stefan Agner 2014-09-06 18:25:04 +02:00 committed by Linus Walleij
parent 3ccc11f6b8
commit 3dac1918a4
3 changed files with 9 additions and 9 deletions
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9
drivers/pinctrl/freescale/pinctrl-imx.c
View File

@ -204,7 +204,7 @@ static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
pin_id = pin->pin;
pin_reg = &info->pin_regs[pin_id];
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->mux_reg) {
if (pin_reg->mux_reg == -1) {
dev_err(ipctl->dev, "Pin(%s) does not support mux function\n",
info->pins[pin_id].name);
return -EINVAL;
@ -308,7 +308,7 @@ static int imx_pinconf_get(struct pinctrl_dev *pctldev,
const struct imx_pinctrl_soc_info *info = ipctl->info;
const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->conf_reg) {
if (pin_reg->conf_reg == -1) {
dev_err(info->dev, "Pin(%s) does not support config function\n",
info->pins[pin_id].name);
return -EINVAL;
@ -331,7 +331,7 @@ static int imx_pinconf_set(struct pinctrl_dev *pctldev,
const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
int i;
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->conf_reg) {
if (pin_reg->conf_reg == -1) {
dev_err(info->dev, "Pin(%s) does not support config function\n",
info->pins[pin_id].name);
return -EINVAL;
@ -586,10 +586,11 @@ int imx_pinctrl_probe(struct platform_device *pdev,
if (!ipctl)
return -ENOMEM;
info->pin_regs = devm_kzalloc(&pdev->dev, sizeof(*info->pin_regs) *
info->pin_regs = devm_kmalloc(&pdev->dev, sizeof(*info->pin_regs) *
info->npins, GFP_KERNEL);
if (!info->pin_regs)
return -ENOMEM;
memset(info->pin_regs, 0xff, sizeof(*info->pin_regs) * info->npins);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ipctl->base = devm_ioremap_resource(&pdev->dev, res);

7
drivers/pinctrl/freescale/pinctrl-imx.h
View File

@ -67,8 +67,8 @@ struct imx_pmx_func {
* @conf_reg: config register offset
*/
struct imx_pin_reg {
u16 mux_reg;
u16 conf_reg;
s16 mux_reg;
s16 conf_reg;
};
struct imx_pinctrl_soc_info {
@ -83,8 +83,7 @@ struct imx_pinctrl_soc_info {
unsigned int flags;
};
#define ZERO_OFFSET_VALID 0x1
#define SHARE_MUX_CONF_REG 0x2
#define SHARE_MUX_CONF_REG 0x1
#define NO_MUX 0x0
#define NO_PAD 0x0

2
drivers/pinctrl/freescale/pinctrl-vf610.c
View File

@ -299,7 +299,7 @@ static const struct pinctrl_pin_desc vf610_pinctrl_pads[] = {
static struct imx_pinctrl_soc_info vf610_pinctrl_info = {
.pins = vf610_pinctrl_pads,
.npins = ARRAY_SIZE(vf610_pinctrl_pads),
.flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
.flags = SHARE_MUX_CONF_REG,
};
static struct of_device_id vf610_pinctrl_of_match[] = {