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authorStephen Warren <swarren@nvidia.com>2012-03-01 18:48:33 -0700
committerLinus Walleij <linus.walleij@linaro.org>2012-03-02 16:20:54 +0100
commit110e4ec5a1cfe20190e7f8c2b8b4eef369de3c99 (patch)
tree2e20b44478f47069ac19f0ef9f5a92bee7576bdd
parent46919ae63d4820e76724beb655274ce143f0da0b (diff)
downloadlinux-110e4ec5a1cfe20190e7f8c2b8b4eef369de3c99.tar.bz2
pinctrl: assume map table entries can't have a NULL name field
pinctrl_register_mappings() already requires that every mapping table entry have a non-NULL name field. Logically, this makes sense too; drivers should always request a specific named state so they know what they're getting. Relying on getting the first mentioned state in the mapping table is error-prone, and a nasty special case to implement, given that a given the mapping table may define multiple states for a device. Remove a small part of the documentation that talked about optionally requesting a specific state; it's mandatory now. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-rw-r--r--Documentation/pinctrl.txt7
-rw-r--r--arch/arm/mach-u300/core.c8
-rw-r--r--drivers/pinctrl/core.c17
-rw-r--r--drivers/tty/serial/sirfsoc_uart.c2
4 files changed, 13 insertions, 21 deletions
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt
index 6fe3232e798e..558aac554d09 100644
--- a/Documentation/pinctrl.txt
+++ b/Documentation/pinctrl.txt
@@ -782,16 +782,19 @@ spi on the second function mapping:
static const struct pinctrl_map __initdata mapping[] = {
{
.dev_name = "foo-spi.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
},
{
.dev_name = "foo-i2c.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "i2c0",
},
{
.dev_name = "foo-mmc.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
},
@@ -944,10 +947,6 @@ foo_remove()
pinctrl_put(state->p);
}
-If you want to grab a specific control mapping and not just the first one
-found for this device you can specify a specific mapping name, for example in
-the above example the second i2c0 setting: pinctrl_get(&device, "spi0-pos-B");
-
This get/enable/disable/put sequence can just as well be handled by bus drivers
if you don't want each and every driver to handle it and you know the
arrangement on your bus.
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index ea6c79076a91..f29565a10e2e 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -1612,9 +1612,9 @@ static struct pinctrl_map __initdata u300_pinmux_map[] = {
PIN_MAP_SYS_HOG("pinctrl-u300", "emif0"),
PIN_MAP_SYS_HOG("pinctrl-u300", "emif1"),
/* per-device maps for MMC/SD, SPI and UART */
- PIN_MAP("MMCSD", "pinctrl-u300", "mmc0", "mmci"),
- PIN_MAP("SPI", "pinctrl-u300", "spi0", "pl022"),
- PIN_MAP("UART0", "pinctrl-u300", "uart0", "uart0"),
+ PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "mmc0", "mmci"),
+ PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "spi0", "pl022"),
+ PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-u300", "uart0", "uart0"),
};
struct u300_mux_hog {
@@ -1646,7 +1646,7 @@ static int __init u300_pinctrl_fetch(void)
struct pinctrl *p;
int ret;
- p = pinctrl_get(u300_mux_hogs[i].dev, NULL);
+ p = pinctrl_get(u300_mux_hogs[i].dev, PINCTRL_STATE_DEFAULT);
if (IS_ERR(p)) {
pr_err("u300: could not get pinmux hog %s\n",
u300_mux_hogs[i].name);
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index f25307b0e00a..6af6d8d117df 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -461,8 +461,8 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
int i;
struct pinctrl_map const *map;
- /* We must have a dev name */
- if (WARN_ON(!dev))
+ /* We must have both a dev and state name */
+ if (WARN_ON(!dev || !name))
return ERR_PTR(-EINVAL);
devname = dev_name(dev);
@@ -504,16 +504,9 @@ static struct pinctrl *pinctrl_get_locked(struct device *dev, const char *name)
if (strcmp(map->dev_name, devname))
continue;
- /*
- * If we're looking for a specific named map, this must match,
- * else we loop and look for the next.
- */
- if (name != NULL) {
- if (map->name == NULL)
- continue;
- if (strcmp(map->name, name))
- continue;
- }
+ /* State name must be the one we're looking for */
+ if (strcmp(map->name, name))
+ continue;
ret = pinmux_apply_muxmap(pctldev, p, dev, devname, map);
if (ret) {
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index c1a871eac450..3cabb650a1c1 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c
@@ -673,7 +673,7 @@ int sirfsoc_uart_probe(struct platform_device *pdev)
port->irq = res->start;
if (sirfport->hw_flow_ctrl) {
- sirfport->p = pinctrl_get(&pdev->dev, NULL);
+ sirfport->p = pinctrl_get(&pdev->dev, PINCTRL_STATE_DEFAULT);
ret = IS_ERR(sirfport->p);
if (ret)
goto pin_err;