Messages in this thread Patch in this message | | | From | Stephen Warren <> | Subject | [PATCH V2 2/2] pinctrl: Assume map table entries can't have a NULL name field | Date | Mon, 27 Feb 2012 16:55:09 -0700 |
| |
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> --- v2: Update mach-u300/core.c and sirfsoc_uart.c not to request NULL state names. Use PINCTRL_STATE_DEFAULT from previous patch.
This is now conceptually ack'd by Dong Aisheng, although I didn't actually include the ack above since I've reworked the patch a little since I last posted it (per the v2 changelog above). --- Documentation/pinctrl.txt | 7 +++---- arch/arm/mach-u300/core.c | 8 ++++---- drivers/pinctrl/core.c | 17 +++++------------ drivers/tty/serial/sirfsoc_uart.c | 2 +- 4 files changed, 13 insertions(+), 21 deletions(-)
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt index 6fe3232..558aac5 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 c9050dd..5b37d84 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -1573,9 +1573,9 @@ 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 { @@ -1607,7 +1607,7 @@ 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 f25307b..6af6d8d 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 c1a871e..3cabb65 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; -- 1.7.0.4
| |