Simplifies the code a bit and drops a few lines.
Signed-off-by: Grant Likely <[email protected]>
---
I've only actually build tested this, but this shows some of the cleanup
achieved using the of_property_read_u32() API. If this gets merged in the
v3.1 merge window then it will need to go via the devicetree/next branch.
g.
drivers/tty/serial/of_serial.c | 37 +++++++++++++++----------------------
1 files changed, 15 insertions(+), 22 deletions(-)
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 36038ed..dbfbfda 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -32,17 +32,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
{
struct resource resource;
struct device_node *np = ofdev->dev.of_node;
- const __be32 *clk, *spd;
- const __be32 *prop;
- int ret, prop_size;
+ u32 clk, spd, prop;
+ int ret;
memset(port, 0, sizeof *port);
- spd = of_get_property(np, "current-speed", NULL);
- clk = of_get_property(np, "clock-frequency", NULL);
- if (!clk) {
+ if (of_property_read_u32(np, "clock-frequency", &clk)) {
dev_warn(&ofdev->dev, "no clock-frequency property set\n");
return -ENODEV;
}
+ /* If current-speed was set, then try not to change it. */
+ if (of_property_read_u32(np, "current-speed", &spd) == 0)
+ port->custom_divisor = clk / (16 * spd);
ret = of_address_to_resource(np, 0, &resource);
if (ret) {
@@ -54,20 +54,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
port->mapbase = resource.start;
/* Check for shifted address mapping */
- prop = of_get_property(np, "reg-offset", &prop_size);
- if (prop && (prop_size == sizeof(u32)))
- port->mapbase += be32_to_cpup(prop);
+ if (of_property_read_u32(np, "reg-offset", &prop) == 0)
+ port->mapbase += prop;
/* Check for registers offset within the devices address range */
- prop = of_get_property(np, "reg-shift", &prop_size);
- if (prop && (prop_size == sizeof(u32)))
- port->regshift = be32_to_cpup(prop);
+ if (of_property_read_u32(np, "reg-shift", &prop) == 0)
+ port->regshift = prop;
port->irq = irq_of_parse_and_map(np, 0);
port->iotype = UPIO_MEM;
- prop = of_get_property(np, "reg-io-width", &prop_size);
- if (prop && (prop_size == sizeof(u32))) {
- switch (be32_to_cpup(prop)) {
+ if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
+ switch (prop) {
case 1:
port->iotype = UPIO_MEM;
break;
@@ -75,21 +72,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
port->iotype = UPIO_MEM32;
break;
default:
- dev_warn(&ofdev->dev,
- "unsupported io width (%d bytes)\n",
- be32_to_cpup(prop));
+ dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
+ prop);
return -EINVAL;
}
}
port->type = type;
- port->uartclk = be32_to_cpup(clk);
+ port->uartclk = clk;
port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
| UPF_FIXED_PORT | UPF_FIXED_TYPE;
port->dev = &ofdev->dev;
- /* If current-speed was set, then try not to change it. */
- if (spd)
- port->custom_divisor = be32_to_cpup(clk) / (16 * (be32_to_cpup(spd)));
return 0;
}
Grant,
On 06/30/2011 02:00 PM, Grant Likely wrote:
> Simplifies the code a bit and drops a few lines.
>
> Signed-off-by: Grant Likely <[email protected]>
> ---
>
> I've only actually build tested this, but this shows some of the cleanup
> achieved using the of_property_read_u32() API. If this gets merged in the
> v3.1 merge window then it will need to go via the devicetree/next branch.
>
> g.
You can't give yourself bonus points. ;)
>
> drivers/tty/serial/of_serial.c | 37 +++++++++++++++----------------------
> 1 files changed, 15 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
> index 36038ed..dbfbfda 100644
> --- a/drivers/tty/serial/of_serial.c
> +++ b/drivers/tty/serial/of_serial.c
> @@ -32,17 +32,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
> {
> struct resource resource;
> struct device_node *np = ofdev->dev.of_node;
> - const __be32 *clk, *spd;
> - const __be32 *prop;
> - int ret, prop_size;
> + u32 clk, spd, prop;
> + int ret;
>
> memset(port, 0, sizeof *port);
> - spd = of_get_property(np, "current-speed", NULL);
> - clk = of_get_property(np, "clock-frequency", NULL);
> - if (!clk) {
> + if (of_property_read_u32(np, "clock-frequency", &clk)) {
s/clk/port->uartclk/
And below, then remove clk.
> dev_warn(&ofdev->dev, "no clock-frequency property set\n");
> return -ENODEV;
> }
> + /* If current-speed was set, then try not to change it. */
> + if (of_property_read_u32(np, "current-speed", &spd) == 0)
> + port->custom_divisor = clk / (16 * spd);
>
> ret = of_address_to_resource(np, 0, &resource);
> if (ret) {
> @@ -54,20 +54,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
> port->mapbase = resource.start;
>
> /* Check for shifted address mapping */
> - prop = of_get_property(np, "reg-offset", &prop_size);
> - if (prop && (prop_size == sizeof(u32)))
> - port->mapbase += be32_to_cpup(prop);
> + if (of_property_read_u32(np, "reg-offset", &prop) == 0)
> + port->mapbase += prop;
>
> /* Check for registers offset within the devices address range */
> - prop = of_get_property(np, "reg-shift", &prop_size);
> - if (prop && (prop_size == sizeof(u32)))
> - port->regshift = be32_to_cpup(prop);
> + if (of_property_read_u32(np, "reg-shift", &prop) == 0)
> + port->regshift = prop;
Can be further simplified:
of_property_read_u32(np, "reg-shift", &port->regshift);
Rob
>
> port->irq = irq_of_parse_and_map(np, 0);
> port->iotype = UPIO_MEM;
> - prop = of_get_property(np, "reg-io-width", &prop_size);
> - if (prop && (prop_size == sizeof(u32))) {
> - switch (be32_to_cpup(prop)) {
> + if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
> + switch (prop) {
> case 1:
> port->iotype = UPIO_MEM;
> break;
> @@ -75,21 +72,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
> port->iotype = UPIO_MEM32;
> break;
> default:
> - dev_warn(&ofdev->dev,
> - "unsupported io width (%d bytes)\n",
> - be32_to_cpup(prop));
> + dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
> + prop);
> return -EINVAL;
> }
> }
>
> port->type = type;
> - port->uartclk = be32_to_cpup(clk);
> + port->uartclk = clk;
> port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
> | UPF_FIXED_PORT | UPF_FIXED_TYPE;
> port->dev = &ofdev->dev;
> - /* If current-speed was set, then try not to change it. */
> - if (spd)
> - port->custom_divisor = be32_to_cpup(clk) / (16 * (be32_to_cpup(spd)));
>
> return 0;
> }
>
> _______________________________________________
> devicetree-discuss mailing list
> [email protected]
> https://lists.ozlabs.org/listinfo/devicetree-discuss
On Thu, Jun 30, 2011 at 2:57 PM, Rob Herring <[email protected]> wrote:
> Grant,
>
> On 06/30/2011 02:00 PM, Grant Likely wrote:
>> Simplifies the code a bit and drops a few lines.
>>
>> Signed-off-by: Grant Likely <[email protected]>
>> ---
>>
>> I've only actually build tested this, but this shows some of the cleanup
>> achieved using the of_property_read_u32() API. ?If this gets merged in the
>> v3.1 merge window then it will need to go via the devicetree/next branch.
>>
>> g.
>
> You can't give yourself bonus points. ;)
>
>>
>> ?drivers/tty/serial/of_serial.c | ? 37 +++++++++++++++----------------------
>> ?1 files changed, 15 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
>> index 36038ed..dbfbfda 100644
>> --- a/drivers/tty/serial/of_serial.c
>> +++ b/drivers/tty/serial/of_serial.c
>> @@ -32,17 +32,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
>> ?{
>> ? ? ? struct resource resource;
>> ? ? ? struct device_node *np = ofdev->dev.of_node;
>> - ? ? const __be32 *clk, *spd;
>> - ? ? const __be32 *prop;
>> - ? ? int ret, prop_size;
>> + ? ? u32 clk, spd, prop;
>> + ? ? int ret;
>>
>> ? ? ? memset(port, 0, sizeof *port);
>> - ? ? spd = of_get_property(np, "current-speed", NULL);
>> - ? ? clk = of_get_property(np, "clock-frequency", NULL);
>> - ? ? if (!clk) {
>> + ? ? if (of_property_read_u32(np, "clock-frequency", &clk)) {
>
> s/clk/port->uartclk/
>
> And below, then remove clk.
>
>> ? ? ? ? ? ? ? dev_warn(&ofdev->dev, "no clock-frequency property set\n");
>> ? ? ? ? ? ? ? return -ENODEV;
>> ? ? ? }
>> + ? ? /* If current-speed was set, then try not to change it. */
>> + ? ? if (of_property_read_u32(np, "current-speed", &spd) == 0)
>> + ? ? ? ? ? ? port->custom_divisor = clk / (16 * spd);
>>
>> ? ? ? ret = of_address_to_resource(np, 0, &resource);
>> ? ? ? if (ret) {
>> @@ -54,20 +54,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
>> ? ? ? port->mapbase = resource.start;
>>
>> ? ? ? /* Check for shifted address mapping */
>> - ? ? prop = of_get_property(np, "reg-offset", &prop_size);
>> - ? ? if (prop && (prop_size == sizeof(u32)))
>> - ? ? ? ? ? ? port->mapbase += be32_to_cpup(prop);
>> + ? ? if (of_property_read_u32(np, "reg-offset", &prop) == 0)
>> + ? ? ? ? ? ? port->mapbase += prop;
>>
>> ? ? ? /* Check for registers offset within the devices address range */
>> - ? ? prop = of_get_property(np, "reg-shift", &prop_size);
>> - ? ? if (prop && (prop_size == sizeof(u32)))
>> - ? ? ? ? ? ? port->regshift = be32_to_cpup(prop);
>> + ? ? if (of_property_read_u32(np, "reg-shift", &prop) == 0)
>> + ? ? ? ? ? ? port->regshift = prop;
>
> Can be further simplified:
>
> of_property_read_u32(np, "reg-shift", &port->regshift);
Hey Rob, thanks for the review.
I thought about that, but the new api specifically needs to be passed
a u32 pointer, not an unsigned char pointer which is what is in the
port structure. That goes for the clk value too. Even for unsigned
int values, i need the u32 bounce variable because it would break on
64 bit platforms.
g.