Messages in this thread | | | From | Grant Likely <> | Date | Thu, 30 Jun 2011 15:01:45 -0600 | Subject | Re: [PATCH] tty/serial: change of_serial to use new of_property_read_u32() api |
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On Thu, Jun 30, 2011 at 2:57 PM, Rob Herring <robherring2@gmail.com> 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 <grant.likely@secretlab.ca> >> --- >> >> 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.
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