[PATCH v2 6/7] ARM: OMAP3: Use .teardown of twl4030-gpio to clean board requests
Igor Grinberg
grinberg at compulab.co.il
Thu Feb 23 09:55:35 EST 2012
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Hi Rajendra,
On 02/23/12 13:40, Rajendra Nayak wrote:
> All OMAP3 boards which register a .setup function with twl4030
> gpio driver do not seem to have a .teardown hook implemented.
> .setup mainly requests a few gpios and also in most cases
> does a omap_hsmmc_deferred_add(). Have a .teardown do a gpio_free()
> and of the requested gpios and also do a omap_hsmmc_deferred_del().
> This helps in case the twl4030 gpio driver is built as a module and
> added and removed multiple times. Without the .teardown a multiple
> insmod/rmmod can result in gpio request failues and also WARN messages
> stating addition of already registered mmc devices.
>
> Reported-by: Russell King <rmk+kernel at arm.linux.org.uk>
> Signed-off-by: Rajendra Nayak <rnayak at ti.com>
> ---
> arch/arm/mach-omap2/board-3430sdp.c | 10 ++++++++++
> arch/arm/mach-omap2/board-cm-t35.c | 8 ++++++++
> arch/arm/mach-omap2/board-devkit8000.c | 10 ++++++++++
> arch/arm/mach-omap2/board-igep0020.c | 14 ++++++++++++++
> arch/arm/mach-omap2/board-ldp.c | 9 +++++++++
> arch/arm/mach-omap2/board-omap3beagle.c | 12 ++++++++++++
> arch/arm/mach-omap2/board-omap3evm.c | 10 ++++++++++
> arch/arm/mach-omap2/board-omap3pandora.c | 9 +++++++++
> arch/arm/mach-omap2/board-omap3stalker.c | 11 +++++++++++
> arch/arm/mach-omap2/board-omap3touchbook.c | 10 ++++++++++
> arch/arm/mach-omap2/board-overo.c | 8 ++++++++
> arch/arm/mach-omap2/board-rx51-peripherals.c | 8 ++++++++
> arch/arm/mach-omap2/board-zoom-peripherals.c | 9 +++++++++
> arch/arm/mach-omap2/hsmmc.c | 11 +++++++++++
> arch/arm/mach-omap2/hsmmc.h | 4 ++++
> 15 files changed, 143 insertions(+), 0 deletions(-)
[...]
> diff --git a/arch/arm/mach-omap2/board-cm-t35.c b/arch/arm/mach-omap2/board-cm-t35.c
> index 14df109..55e0180 100644
> --- a/arch/arm/mach-omap2/board-cm-t35.c
> +++ b/arch/arm/mach-omap2/board-cm-t35.c
> @@ -475,11 +475,19 @@ static int cm_t35_twl_gpio_setup(struct device *dev, unsigned gpio,
> return 0;
> }
>
> +static int cm_t35_twl_gpio_teardown(struct device *dev, unsigned gpio,
> + unsigned ngpio)
> +{
> + omap_hsmmc_deferred_del(mmc);
> + gpio_free(gpio + 2);
> + return 0;
> +}
Can we have an empty line here?
> static struct twl4030_gpio_platform_data cm_t35_gpio_data = {
> .gpio_base = OMAP_MAX_GPIO_LINES,
> .irq_base = TWL4030_GPIO_IRQ_BASE,
> .irq_end = TWL4030_GPIO_IRQ_END,
> .setup = cm_t35_twl_gpio_setup,
> + .teardown = cm_t35_twl_gpio_teardown,
> };
>
> static struct twl4030_platform_data cm_t35_twldata = {
[...]
> diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
> index 11a6aa4..1d0850f 100644
> --- a/arch/arm/mach-omap2/board-igep0020.c
> +++ b/arch/arm/mach-omap2/board-igep0020.c
> @@ -435,12 +435,26 @@ static int igep_twl_gpio_setup(struct device *dev,
> return 0;
> };
>
> +static int igep_twl_gpio_teardown(struct device *dev,
> + unsigned gpio, unsigned ngpio)
> +{
> + omap_hsmmc_deferred_del(mmc);
> + gpio_free(gpio + TWL4030_GPIO_MAX + 1);
> + if (machine_is_igep0030())
> + return 0;
> +
> + gpio_free(gpio + 1);
> + gpio_free(gpio + TWL4030_GPIO_MAX);
gpio_free_array()?
> + return 0;
> +}
> +
> static struct twl4030_gpio_platform_data igep_twl4030_gpio_pdata = {
> .gpio_base = OMAP_MAX_GPIO_LINES,
> .irq_base = TWL4030_GPIO_IRQ_BASE,
> .irq_end = TWL4030_GPIO_IRQ_END,
> .use_leds = true,
> .setup = igep_twl_gpio_setup,
> + .teardown = igep_twl_gpio_teardown,
> };
>
> static int igep2_enable_dvi(struct omap_dss_device *dssdev)
[...]
> diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
> index 8b6065b..e1f496d 100644
> --- a/arch/arm/mach-omap2/board-overo.c
> +++ b/arch/arm/mach-omap2/board-overo.c
> @@ -419,12 +419,20 @@ static int overo_twl_gpio_setup(struct device *dev,
> return 0;
> }
>
> +static int overo_twl_gpio_teardown(struct device *dev,
> + unsigned gpio, unsigned ngpio)
> +{
> + omap_hsmmc_deferred_del(mmc);
If Overo will not have omap_hsmmc_deferred_add() (as for my comment to
the previous patch), then no need for the omap_hsmmc_deferred_del().
> + return 0;
> +}
> +
> static struct twl4030_gpio_platform_data overo_gpio_data = {
> .gpio_base = OMAP_MAX_GPIO_LINES,
> .irq_base = TWL4030_GPIO_IRQ_BASE,
> .irq_end = TWL4030_GPIO_IRQ_END,
> .use_leds = true,
> .setup = overo_twl_gpio_setup,
> + .teardown = overo_twl_gpio_teardown,
> };
>
> static struct regulator_init_data overo_vmmc1 = {
[...]
> diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
> index 51e3a2d..0f256ca 100644
> --- a/arch/arm/mach-omap2/hsmmc.c
> +++ b/arch/arm/mach-omap2/hsmmc.c
> @@ -541,6 +541,17 @@ void omap_hsmmc_deferred_add(struct omap2_hsmmc_info *controllers)
> }
> }
>
> +void omap_hsmmc_deferred_del(struct omap2_hsmmc_info *controllers)
> +{
> + struct platform_device *pdev;
> + for (; controllers->mmc; controllers++) {
> + if (!controllers->deferred)
> + continue;
> + pdev = controllers->pdev;
> + omap_device_unregister(pdev);
Just:
if (controllers->deferred)
omap_device_unregister(controllers->pdev);
and no need for the for loop brackets?
> + }
> +}
> +
> void omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
> {
> u32 reg;
[...]
- --
Regards,
Igor.
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