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pinctrl: imx: add VF610 support to imx pinctrl framework

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On some platforms such as VF610, offset of mux and pad ctrl register
may be zero, and the mux_mode and config_val are in one 32-bit register.
This patch adds support to imx core pinctrl framework to handle these
cases.

Signed-off-by: Jingchang Lu <b35083@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Jingchang Lu 2013-05-28 17:32:07 +08:00 committed by Linus Walleij
parent 7bbc87b801
commit bf5a530971
2 changed files with 46 additions and 11 deletions
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53
drivers/pinctrl/pinctrl-imx.c
View file

@ -221,13 +221,21 @@ static int imx_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
pin_id = pins[i];
pin_reg = &info->pin_regs[pin_id];
if (!pin_reg->mux_reg) {
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->mux_reg) {
dev_err(ipctl->dev, "Pin(%s) does not support mux function\n",
info->pins[pin_id].name);
return -EINVAL;
}
writel(mux[i], ipctl->base + pin_reg->mux_reg);
if (info->flags & SHARE_MUX_CONF_REG) {
u32 reg;
reg = readl(ipctl->base + pin_reg->mux_reg);
reg &= ~(0x7 << 20);
reg |= (mux[i] << 20);
writel(reg, ipctl->base + pin_reg->mux_reg);
} else {
writel(mux[i], ipctl->base + pin_reg->mux_reg);
}
dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
pin_reg->mux_reg, mux[i]);
@ -287,7 +295,7 @@ 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 (!pin_reg->conf_reg) {
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->conf_reg) {
dev_err(info->dev, "Pin(%s) does not support config function\n",
info->pins[pin_id].name);
return -EINVAL;
@ -295,6 +303,9 @@ static int imx_pinconf_get(struct pinctrl_dev *pctldev,
*config = readl(ipctl->base + pin_reg->conf_reg);
if (info->flags & SHARE_MUX_CONF_REG)
*config &= 0xffff;
return 0;
}
@ -305,7 +316,7 @@ static int imx_pinconf_set(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 (!pin_reg->conf_reg) {
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->conf_reg) {
dev_err(info->dev, "Pin(%s) does not support config function\n",
info->pins[pin_id].name);
return -EINVAL;
@ -314,7 +325,15 @@ static int imx_pinconf_set(struct pinctrl_dev *pctldev,
dev_dbg(ipctl->dev, "pinconf set pin %s\n",
info->pins[pin_id].name);
writel(config, ipctl->base + pin_reg->conf_reg);
if (info->flags & SHARE_MUX_CONF_REG) {
u32 reg;
reg = readl(ipctl->base + pin_reg->conf_reg);
reg &= ~0xffff;
reg |= config;
writel(reg, ipctl->base + pin_reg->conf_reg);
} else {
writel(config, ipctl->base + pin_reg->conf_reg);
}
dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
pin_reg->conf_reg, config);
@ -381,19 +400,24 @@ static struct pinctrl_desc imx_pinctrl_desc = {
* 1 u32 CONFIG, so 24 types in total for each pin.
*/
#define FSL_PIN_SIZE 24
#define SHARE_FSL_PIN_SIZE 20
static int imx_pinctrl_parse_groups(struct device_node *np,
struct imx_pin_group *grp,
struct imx_pinctrl_soc_info *info,
u32 index)
{
int size;
int size, pin_size;
const __be32 *list;
int i;
u32 config;
dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
if (info->flags & SHARE_MUX_CONF_REG)
pin_size = SHARE_FSL_PIN_SIZE;
else
pin_size = FSL_PIN_SIZE;
/* Initialise group */
grp->name = np->name;
@ -403,12 +427,12 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
*/
list = of_get_property(np, "fsl,pins", &size);
/* we do not check return since it's safe node passed down */
if (!size || size % FSL_PIN_SIZE) {
if (!size || size % pin_size) {
dev_err(info->dev, "Invalid fsl,pins property\n");
return -EINVAL;
}
grp->npins = size / FSL_PIN_SIZE;
grp->npins = size / pin_size;
grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
GFP_KERNEL);
grp->mux_mode = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
@ -421,10 +445,17 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
GFP_KERNEL);
for (i = 0; i < grp->npins; i++) {
u32 mux_reg = be32_to_cpu(*list++);
u32 conf_reg = be32_to_cpu(*list++);
unsigned int pin_id = mux_reg ? mux_reg / 4 : conf_reg / 4;
struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
u32 conf_reg;
unsigned int pin_id;
struct imx_pin_reg *pin_reg;
if (info->flags & SHARE_MUX_CONF_REG)
conf_reg = mux_reg;
else
conf_reg = be32_to_cpu(*list++);
pin_id = mux_reg ? mux_reg / 4 : conf_reg / 4;
pin_reg = &info->pin_regs[pin_id];
grp->pins[i] = pin_id;
pin_reg->mux_reg = mux_reg;
pin_reg->conf_reg = conf_reg;

4
drivers/pinctrl/pinctrl-imx.h
View file

@ -74,8 +74,12 @@ struct imx_pinctrl_soc_info {
unsigned int ngroups;
struct imx_pmx_func *functions;
unsigned int nfunctions;
unsigned int flags;
};
#define ZERO_OFFSET_VALID 0x1
#define SHARE_MUX_CONF_REG 0x2
#define NO_MUX 0x0
#define NO_PAD 0x0