[PATCH 1/2] gpio/mxc: get rid of the uses of cpu_is_mx()
Shawn Guo
shawn.guo at freescale.com
Tue Jul 5 02:56:29 EST 2011
On Mon, Jul 04, 2011 at 12:10:28AM -0600, Grant Likely wrote:
> On Sun, Jul 03, 2011 at 04:16:56PM +0800, Shawn Guo wrote:
> > The patch removes all the uses of cpu_is_mx(). Instead, it utilizes
> > platform_device_id to distinguish the gpio differences among SoCs.
> >
> > Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> > Cc: Grant Likely <grant.likely at secretlab.ca>
> > Cc: Sascha Hauer <s.hauer at pengutronix.de>
> > ---
> > arch/arm/mach-imx/mm-imx1.c | 8 +-
> > arch/arm/mach-imx/mm-imx21.c | 12 +-
> > arch/arm/mach-imx/mm-imx25.c | 8 +-
> > arch/arm/mach-imx/mm-imx27.c | 12 +-
> > arch/arm/mach-imx/mm-imx31.c | 6 +-
> > arch/arm/mach-imx/mm-imx35.c | 6 +-
> > arch/arm/mach-mx5/mm-mx50.c | 12 +-
> > arch/arm/mach-mx5/mm.c | 22 ++--
> > arch/arm/plat-mxc/devices/platform-gpio-mxc.c | 4 +-
> > arch/arm/plat-mxc/include/mach/common.h | 2 +-
> > drivers/gpio/gpio-mxc.c | 123 +++++++++++++++++++++----
> > 11 files changed, 151 insertions(+), 64 deletions(-)
> >
> > diff --git a/arch/arm/mach-imx/mm-imx1.c b/arch/arm/mach-imx/mm-imx1.c
> > index f2a6566..2bded59 100644
> > --- a/arch/arm/mach-imx/mm-imx1.c
> > +++ b/arch/arm/mach-imx/mm-imx1.c
> > @@ -50,12 +50,12 @@ void __init mx1_init_irq(void)
> >
> > void __init imx1_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX1_GPIO1_BASE_ADDR, SZ_256,
> > + mxc_register_gpio("imx1-gpio", 0, MX1_GPIO1_BASE_ADDR, SZ_256,
> > MX1_GPIO_INT_PORTA, 0);
> > - mxc_register_gpio(1, MX1_GPIO2_BASE_ADDR, SZ_256,
> > + mxc_register_gpio("imx1-gpio", 1, MX1_GPIO2_BASE_ADDR, SZ_256,
> > MX1_GPIO_INT_PORTB, 0);
> > - mxc_register_gpio(2, MX1_GPIO3_BASE_ADDR, SZ_256,
> > + mxc_register_gpio("imx1-gpio", 2, MX1_GPIO3_BASE_ADDR, SZ_256,
> > MX1_GPIO_INT_PORTC, 0);
> > - mxc_register_gpio(3, MX1_GPIO4_BASE_ADDR, SZ_256,
> > + mxc_register_gpio("imx1-gpio", 3, MX1_GPIO4_BASE_ADDR, SZ_256,
> > MX1_GPIO_INT_PORTD, 0);
> > }
> > diff --git a/arch/arm/mach-imx/mm-imx21.c b/arch/arm/mach-imx/mm-imx21.c
> > index 4f32a8a..d02e20d 100644
> > --- a/arch/arm/mach-imx/mm-imx21.c
> > +++ b/arch/arm/mach-imx/mm-imx21.c
> > @@ -77,12 +77,12 @@ void __init mx21_init_irq(void)
> >
> > void __init imx21_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX21_GPIO1_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > - mxc_register_gpio(1, MX21_GPIO2_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > - mxc_register_gpio(2, MX21_GPIO3_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > - mxc_register_gpio(3, MX21_GPIO4_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > - mxc_register_gpio(4, MX21_GPIO5_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > - mxc_register_gpio(5, MX21_GPIO6_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 0, MX21_GPIO1_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 1, MX21_GPIO2_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 2, MX21_GPIO3_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 3, MX21_GPIO4_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 4, MX21_GPIO5_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 5, MX21_GPIO6_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
> >
> > imx_add_imx_dma();
> > }
> > diff --git a/arch/arm/mach-imx/mm-imx25.c b/arch/arm/mach-imx/mm-imx25.c
> > index 1e0c956..bbe93a5 100644
> > --- a/arch/arm/mach-imx/mm-imx25.c
> > +++ b/arch/arm/mach-imx/mm-imx25.c
> > @@ -86,10 +86,10 @@ static struct sdma_platform_data imx25_sdma_pdata __initdata = {
> >
> > void __init imx25_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX25_GPIO1_BASE_ADDR, SZ_16K, MX25_INT_GPIO1, 0);
> > - mxc_register_gpio(1, MX25_GPIO2_BASE_ADDR, SZ_16K, MX25_INT_GPIO2, 0);
> > - mxc_register_gpio(2, MX25_GPIO3_BASE_ADDR, SZ_16K, MX25_INT_GPIO3, 0);
> > - mxc_register_gpio(3, MX25_GPIO4_BASE_ADDR, SZ_16K, MX25_INT_GPIO4, 0);
> > + mxc_register_gpio("imx-gpio", 0, MX25_GPIO1_BASE_ADDR, SZ_16K, MX25_INT_GPIO1, 0);
> > + mxc_register_gpio("imx-gpio", 1, MX25_GPIO2_BASE_ADDR, SZ_16K, MX25_INT_GPIO2, 0);
> > + mxc_register_gpio("imx-gpio", 2, MX25_GPIO3_BASE_ADDR, SZ_16K, MX25_INT_GPIO3, 0);
> > + mxc_register_gpio("imx-gpio", 3, MX25_GPIO4_BASE_ADDR, SZ_16K, MX25_INT_GPIO4, 0);
> >
> > imx_add_imx_sdma(MX25_SDMA_BASE_ADDR, MX25_INT_SDMA, &imx25_sdma_pdata);
> > }
> > diff --git a/arch/arm/mach-imx/mm-imx27.c b/arch/arm/mach-imx/mm-imx27.c
> > index 944e02d..5a62969 100644
> > --- a/arch/arm/mach-imx/mm-imx27.c
> > +++ b/arch/arm/mach-imx/mm-imx27.c
> > @@ -77,12 +77,12 @@ void __init mx27_init_irq(void)
> >
> > void __init imx27_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX27_GPIO1_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > - mxc_register_gpio(1, MX27_GPIO2_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > - mxc_register_gpio(2, MX27_GPIO3_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > - mxc_register_gpio(3, MX27_GPIO4_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > - mxc_register_gpio(4, MX27_GPIO5_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > - mxc_register_gpio(5, MX27_GPIO6_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 0, MX27_GPIO1_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 1, MX27_GPIO2_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 2, MX27_GPIO3_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 3, MX27_GPIO4_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 4, MX27_GPIO5_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> > + mxc_register_gpio("imx2-gpio", 5, MX27_GPIO6_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
> >
> > imx_add_imx_dma();
> > }
> > diff --git a/arch/arm/mach-imx/mm-imx31.c b/arch/arm/mach-imx/mm-imx31.c
> > index a1ff96f..7017c4a 100644
> > --- a/arch/arm/mach-imx/mm-imx31.c
> > +++ b/arch/arm/mach-imx/mm-imx31.c
> > @@ -78,9 +78,9 @@ void __init imx31_soc_init(void)
> > {
> > int to_version = mx31_revision() >> 4;
> >
> > - mxc_register_gpio(0, MX31_GPIO1_BASE_ADDR, SZ_16K, MX31_INT_GPIO1, 0);
> > - mxc_register_gpio(1, MX31_GPIO2_BASE_ADDR, SZ_16K, MX31_INT_GPIO2, 0);
> > - mxc_register_gpio(2, MX31_GPIO3_BASE_ADDR, SZ_16K, MX31_INT_GPIO3, 0);
> > + mxc_register_gpio("imx-gpio", 0, MX31_GPIO1_BASE_ADDR, SZ_16K, MX31_INT_GPIO1, 0);
> > + mxc_register_gpio("imx-gpio", 1, MX31_GPIO2_BASE_ADDR, SZ_16K, MX31_INT_GPIO2, 0);
> > + mxc_register_gpio("imx-gpio", 2, MX31_GPIO3_BASE_ADDR, SZ_16K, MX31_INT_GPIO3, 0);
> >
> > if (to_version == 1) {
> > strncpy(imx31_sdma_pdata.fw_name, "sdma-imx31-to1.bin",
> > diff --git a/arch/arm/mach-imx/mm-imx35.c b/arch/arm/mach-imx/mm-imx35.c
> > index da530ca..568a5c6 100644
> > --- a/arch/arm/mach-imx/mm-imx35.c
> > +++ b/arch/arm/mach-imx/mm-imx35.c
> > @@ -95,9 +95,9 @@ void __init imx35_soc_init(void)
> > {
> > int to_version = mx35_revision() >> 4;
> >
> > - mxc_register_gpio(0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
> > - mxc_register_gpio(1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);
> > - mxc_register_gpio(2, MX35_GPIO3_BASE_ADDR, SZ_16K, MX35_INT_GPIO3, 0);
> > + mxc_register_gpio("imx-gpio", 0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
> > + mxc_register_gpio("imx-gpio", 1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);
> > + mxc_register_gpio("imx-gpio", 2, MX35_GPIO3_BASE_ADDR, SZ_16K, MX35_INT_GPIO3, 0);
> >
> > if (to_version == 1) {
> > strncpy(imx35_sdma_pdata.fw_name, "sdma-imx35-to1.bin",
> > diff --git a/arch/arm/mach-mx5/mm-mx50.c b/arch/arm/mach-mx5/mm-mx50.c
> > index 28c3f60..39e4a17 100644
> > --- a/arch/arm/mach-mx5/mm-mx50.c
> > +++ b/arch/arm/mach-mx5/mm-mx50.c
> > @@ -62,10 +62,10 @@ void __init mx50_init_irq(void)
> >
> > void __init imx50_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX50_GPIO1_BASE_ADDR, SZ_16K, MX50_INT_GPIO1_LOW, MX50_INT_GPIO1_HIGH);
> > - mxc_register_gpio(1, MX50_GPIO2_BASE_ADDR, SZ_16K, MX50_INT_GPIO2_LOW, MX50_INT_GPIO2_HIGH);
> > - mxc_register_gpio(2, MX50_GPIO3_BASE_ADDR, SZ_16K, MX50_INT_GPIO3_LOW, MX50_INT_GPIO3_HIGH);
> > - mxc_register_gpio(3, MX50_GPIO4_BASE_ADDR, SZ_16K, MX50_INT_GPIO4_LOW, MX50_INT_GPIO4_HIGH);
> > - mxc_register_gpio(4, MX50_GPIO5_BASE_ADDR, SZ_16K, MX50_INT_GPIO5_LOW, MX50_INT_GPIO5_HIGH);
> > - mxc_register_gpio(5, MX50_GPIO6_BASE_ADDR, SZ_16K, MX50_INT_GPIO6_LOW, MX50_INT_GPIO6_HIGH);
> > + mxc_register_gpio("imx-gpio", 0, MX50_GPIO1_BASE_ADDR, SZ_16K, MX50_INT_GPIO1_LOW, MX50_INT_GPIO1_HIGH);
> > + mxc_register_gpio("imx-gpio", 1, MX50_GPIO2_BASE_ADDR, SZ_16K, MX50_INT_GPIO2_LOW, MX50_INT_GPIO2_HIGH);
> > + mxc_register_gpio("imx-gpio", 2, MX50_GPIO3_BASE_ADDR, SZ_16K, MX50_INT_GPIO3_LOW, MX50_INT_GPIO3_HIGH);
> > + mxc_register_gpio("imx-gpio", 3, MX50_GPIO4_BASE_ADDR, SZ_16K, MX50_INT_GPIO4_LOW, MX50_INT_GPIO4_HIGH);
> > + mxc_register_gpio("imx-gpio", 4, MX50_GPIO5_BASE_ADDR, SZ_16K, MX50_INT_GPIO5_LOW, MX50_INT_GPIO5_HIGH);
> > + mxc_register_gpio("imx-gpio", 5, MX50_GPIO6_BASE_ADDR, SZ_16K, MX50_INT_GPIO6_LOW, MX50_INT_GPIO6_HIGH);
> > }
> > diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
> > index 1b7059f..1444140 100644
> > --- a/arch/arm/mach-mx5/mm.c
> > +++ b/arch/arm/mach-mx5/mm.c
> > @@ -142,23 +142,23 @@ static struct sdma_platform_data imx53_sdma_pdata __initdata = {
> >
> > void __init imx51_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX51_GPIO1_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO1_LOW, MX51_MXC_INT_GPIO1_HIGH);
> > - mxc_register_gpio(1, MX51_GPIO2_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO2_LOW, MX51_MXC_INT_GPIO2_HIGH);
> > - mxc_register_gpio(2, MX51_GPIO3_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO3_LOW, MX51_MXC_INT_GPIO3_HIGH);
> > - mxc_register_gpio(3, MX51_GPIO4_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO4_LOW, MX51_MXC_INT_GPIO4_HIGH);
> > + mxc_register_gpio("imx-gpio", 0, MX51_GPIO1_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO1_LOW, MX51_MXC_INT_GPIO1_HIGH);
> > + mxc_register_gpio("imx-gpio", 1, MX51_GPIO2_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO2_LOW, MX51_MXC_INT_GPIO2_HIGH);
> > + mxc_register_gpio("imx-gpio", 2, MX51_GPIO3_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO3_LOW, MX51_MXC_INT_GPIO3_HIGH);
> > + mxc_register_gpio("imx-gpio", 3, MX51_GPIO4_BASE_ADDR, SZ_16K, MX51_MXC_INT_GPIO4_LOW, MX51_MXC_INT_GPIO4_HIGH);
> >
> > imx_add_imx_sdma(MX51_SDMA_BASE_ADDR, MX51_INT_SDMA, &imx51_sdma_pdata);
> > }
> >
> > void __init imx53_soc_init(void)
> > {
> > - mxc_register_gpio(0, MX53_GPIO1_BASE_ADDR, SZ_16K, MX53_INT_GPIO1_LOW, MX53_INT_GPIO1_HIGH);
> > - mxc_register_gpio(1, MX53_GPIO2_BASE_ADDR, SZ_16K, MX53_INT_GPIO2_LOW, MX53_INT_GPIO2_HIGH);
> > - mxc_register_gpio(2, MX53_GPIO3_BASE_ADDR, SZ_16K, MX53_INT_GPIO3_LOW, MX53_INT_GPIO3_HIGH);
> > - mxc_register_gpio(3, MX53_GPIO4_BASE_ADDR, SZ_16K, MX53_INT_GPIO4_LOW, MX53_INT_GPIO4_HIGH);
> > - mxc_register_gpio(4, MX53_GPIO5_BASE_ADDR, SZ_16K, MX53_INT_GPIO5_LOW, MX53_INT_GPIO5_HIGH);
> > - mxc_register_gpio(5, MX53_GPIO6_BASE_ADDR, SZ_16K, MX53_INT_GPIO6_LOW, MX53_INT_GPIO6_HIGH);
> > - mxc_register_gpio(6, MX53_GPIO7_BASE_ADDR, SZ_16K, MX53_INT_GPIO7_LOW, MX53_INT_GPIO7_HIGH);
> > + mxc_register_gpio("imx-gpio", 0, MX53_GPIO1_BASE_ADDR, SZ_16K, MX53_INT_GPIO1_LOW, MX53_INT_GPIO1_HIGH);
> > + mxc_register_gpio("imx-gpio", 1, MX53_GPIO2_BASE_ADDR, SZ_16K, MX53_INT_GPIO2_LOW, MX53_INT_GPIO2_HIGH);
> > + mxc_register_gpio("imx-gpio", 2, MX53_GPIO3_BASE_ADDR, SZ_16K, MX53_INT_GPIO3_LOW, MX53_INT_GPIO3_HIGH);
> > + mxc_register_gpio("imx-gpio", 3, MX53_GPIO4_BASE_ADDR, SZ_16K, MX53_INT_GPIO4_LOW, MX53_INT_GPIO4_HIGH);
> > + mxc_register_gpio("imx-gpio", 4, MX53_GPIO5_BASE_ADDR, SZ_16K, MX53_INT_GPIO5_LOW, MX53_INT_GPIO5_HIGH);
> > + mxc_register_gpio("imx-gpio", 5, MX53_GPIO6_BASE_ADDR, SZ_16K, MX53_INT_GPIO6_LOW, MX53_INT_GPIO6_HIGH);
> > + mxc_register_gpio("imx-gpio", 6, MX53_GPIO7_BASE_ADDR, SZ_16K, MX53_INT_GPIO7_LOW, MX53_INT_GPIO7_HIGH);
> >
> > imx_add_imx_sdma(MX53_SDMA_BASE_ADDR, MX53_INT_SDMA, &imx53_sdma_pdata);
> > }
> > diff --git a/arch/arm/plat-mxc/devices/platform-gpio-mxc.c b/arch/arm/plat-mxc/devices/platform-gpio-mxc.c
> > index cf1b7fd..a7919a2 100644
> > --- a/arch/arm/plat-mxc/devices/platform-gpio-mxc.c
> > +++ b/arch/arm/plat-mxc/devices/platform-gpio-mxc.c
> > @@ -8,7 +8,7 @@
> > */
> > #include <mach/devices-common.h>
> >
> > -struct platform_device *__init mxc_register_gpio(int id,
> > +struct platform_device *__init mxc_register_gpio(char *name, int id,
> > resource_size_t iobase, resource_size_t iosize, int irq, int irq_high)
> > {
> > struct resource res[] = {
> > @@ -28,5 +28,5 @@ struct platform_device *__init mxc_register_gpio(int id,
> > };
> >
> > return platform_device_register_resndata(&mxc_aips_bus,
> > - "gpio-mxc", id, res, ARRAY_SIZE(res), NULL, 0);
> > + name, id, res, ARRAY_SIZE(res), NULL, 0);
> > }
> > diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
> > index 91fa263..4e3d978 100644
> > --- a/arch/arm/plat-mxc/include/mach/common.h
> > +++ b/arch/arm/plat-mxc/include/mach/common.h
> > @@ -64,7 +64,7 @@ extern int mx51_clocks_init(unsigned long ckil, unsigned long osc,
> > unsigned long ckih1, unsigned long ckih2);
> > extern int mx53_clocks_init(unsigned long ckil, unsigned long osc,
> > unsigned long ckih1, unsigned long ckih2);
> > -extern struct platform_device *mxc_register_gpio(int id,
> > +extern struct platform_device *mxc_register_gpio(char *name, int id,
> > resource_size_t iobase, resource_size_t iosize, int irq, int irq_high);
> > extern int mxc_register_device(struct platform_device *pdev, void *data);
> > extern void mxc_set_cpu_type(unsigned int type);
> > diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
> > index 2f6a81b..7ae71d6 100644
> > --- a/drivers/gpio/gpio-mxc.c
> > +++ b/drivers/gpio/gpio-mxc.c
> > @@ -27,9 +27,34 @@
> > #include <linux/platform_device.h>
> > #include <linux/slab.h>
> > #include <linux/basic_mmio_gpio.h>
> > -#include <mach/hardware.h>
> > #include <asm-generic/bug.h>
> >
> > +enum mxc_gpio_type {
> > + IMX1_GPIO,
> > + IMX2_GPIO,
> > + IMX_GPIO,
> > +};
> > +
> > +/* device type dependent stuff */
> > +struct mxc_gpio_hwdata {
> > + unsigned dr_reg;
> > + unsigned gdir_reg;
> > + unsigned psr_reg;
> > + unsigned icr1_reg;
> > + unsigned icr2_reg;
> > + unsigned imr_reg;
> > + unsigned isr_reg;
> > + unsigned low_level;
> > + unsigned high_level;
> > + unsigned rise_edge;
> > + unsigned fall_edge;
> > +};
> > +
> > +struct mxc_gpio_data {
> > + struct mxc_gpio_hwdata *hwdata;
> > + enum mxc_gpio_type devtype;
> > +};
> > +
> > struct mxc_gpio_port {
> > struct list_head node;
> > void __iomem *base;
> > @@ -38,6 +63,82 @@ struct mxc_gpio_port {
> > int virtual_irq_start;
> > struct bgpio_chip bgc;
> > u32 both_edges;
> > + struct mxc_gpio_data *devdata;
> > +};
> > +
> > +#define IS_IMX2_GPIO() (port->devdata->devtype == IMX2_GPIO)
>
> 'tis better to program in C than CPP. :) A static inline would go better
> here.
>
> Also, when you change to using discrete mxc_gpio_hwdata
> instances instead of a single table, you can change this test to be:
>
> static inline int is_imx2_gpio(port) {
> return port->devdata == &imx2_gpio_hwdata;
> }
>
imx1 and imx2 shares the same hwdata, so we can not use the approach
to distinguish imx2 from imx1.
Anyway, I'm killing IS_IMX2_GPIO since it's only used once and does
not deserve a macro or inline function.
> > +
> > +#define GPIO_DR (port->devdata->hwdata->dr_reg)
> > +#define GPIO_GDIR (port->devdata->hwdata->gdir_reg)
> > +#define GPIO_PSR (port->devdata->hwdata->psr_reg)
> > +#define GPIO_ICR1 (port->devdata->hwdata->icr1_reg)
> > +#define GPIO_ICR2 (port->devdata->hwdata->icr2_reg)
> > +#define GPIO_IMR (port->devdata->hwdata->imr_reg)
> > +#define GPIO_ISR (port->devdata->hwdata->isr_reg)
> > +
> > +#define GPIO_INT_LOW_LEV (port->devdata->hwdata->low_level)
> > +#define GPIO_INT_HIGH_LEV (port->devdata->hwdata->high_level)
> > +#define GPIO_INT_RISE_EDGE (port->devdata->hwdata->rise_edge)
> > +#define GPIO_INT_FALL_EDGE (port->devdata->hwdata->fall_edge)
> > +#define GPIO_INT_NONE 0x4
>
> This ends up creating a lot more indirection in the driver which may
> have a measurable have a performance impact. Plus, these new macros
> depend on local context that will break in unexpected ways if someone
> changes the 'port' name.
>
> Unfortunately, to fix this property will require a lot more lines of
> code change because every GPIO_* reference will need to be fixed, but
> I'd rather see that than a set of ugly macros that just happen to be
> convenient in the short term.
>
The comments remind me one fact that these stuff are actually soc
dependent than port, because we can never run on a soc that gets
UART1 as IMX1_GPIO while UART2 as IMX2_GPIO. The fact is if we are
running on IMX1, all UART ports must be IMX1_GPIO, and if on IMX2,
all ports must be IMX2_GPIO. Based on this observation, we can
define global static variables for hwdata and hwtype and get them
set up during probe for only one port, so that your above two concerns
can be address without touch every GPIO_* lines. Here is the patch.
Please let me know what you think.
---8<-----------
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 2f6a81b..19a173c 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -27,9 +27,29 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/basic_mmio_gpio.h>
-#include <mach/hardware.h>
#include <asm-generic/bug.h>
+enum mxc_gpio_hwtype {
+ IMX1_GPIO,
+ IMX2_GPIO,
+ IMX_GPIO,
+};
+
+/* device type dependent stuff */
+struct mxc_gpio_hwdata {
+ unsigned dr_reg;
+ unsigned gdir_reg;
+ unsigned psr_reg;
+ unsigned icr1_reg;
+ unsigned icr2_reg;
+ unsigned imr_reg;
+ unsigned isr_reg;
+ unsigned low_level;
+ unsigned high_level;
+ unsigned rise_edge;
+ unsigned fall_edge;
+};
+
struct mxc_gpio_port {
struct list_head node;
void __iomem *base;
@@ -40,6 +60,72 @@ struct mxc_gpio_port {
u32 both_edges;
};
+static struct mxc_gpio_hwdata imx1_imx2_gpio_hwdata = {
+ .dr_reg = 0x1c,
+ .gdir_reg = 0x00,
+ .psr_reg = 0x24,
+ .icr1_reg = 0x28,
+ .icr2_reg = 0x2c,
+ .imr_reg = 0x30,
+ .isr_reg = 0x34,
+ .low_level = 0x03,
+ .high_level = 0x02,
+ .rise_edge = 0x00,
+ .fall_edge = 0x01,
+};
+
+static struct mxc_gpio_hwdata imx_gpio_hwdata = {
+ .dr_reg = 0x00,
+ .gdir_reg = 0x04,
+ .psr_reg = 0x08,
+ .icr1_reg = 0x0c,
+ .icr2_reg = 0x10,
+ .imr_reg = 0x14,
+ .isr_reg = 0x18,
+ .low_level = 0x00,
+ .high_level = 0x01,
+ .rise_edge = 0x02,
+ .fall_edge = 0x03,
+};
+
+static enum mxc_gpio_hwtype mxs_gpio_hwtype;
+static struct mxc_gpio_hwdata *mxc_gpio_hwdata;
+
+#define GPIO_DR (mxc_gpio_hwdata->dr_reg)
+#define GPIO_GDIR (mxc_gpio_hwdata->gdir_reg)
+#define GPIO_PSR (mxc_gpio_hwdata->psr_reg)
+#define GPIO_ICR1 (mxc_gpio_hwdata->icr1_reg)
+#define GPIO_ICR2 (mxc_gpio_hwdata->icr2_reg)
+#define GPIO_IMR (mxc_gpio_hwdata->imr_reg)
+#define GPIO_ISR (mxc_gpio_hwdata->isr_reg)
+
+#define GPIO_INT_LOW_LEV (mxc_gpio_hwdata->low_level)
+#define GPIO_INT_HIGH_LEV (mxc_gpio_hwdata->high_level)
+#define GPIO_INT_RISE_EDGE (mxc_gpio_hwdata->rise_edge)
+#define GPIO_INT_FALL_EDGE (mxc_gpio_hwdata->fall_edge)
+#define GPIO_INT_NONE 0x4
+
+static struct platform_device_id mxc_gpio_devtype[] = {
+ {
+ .name = "imx1-gpio",
+ .driver_data = IMX1_GPIO,
+ }, {
+ .name = "imx21-gpio",
+ .driver_data = IMX2_GPIO,
+ }, {
+ .name = "imx25-gpio",
+ .driver_data = IMX_GPIO,
+ }, {
+ .name = "imx27-gpio",
+ .driver_data = IMX2_GPIO,
+ }, {
+ .name = "imx-gpio",
+ .driver_data = IMX_GPIO,
+ }, {
+ /* sentinel */
+ }
+};
+
/*
* MX2 has one interrupt *for all* gpio ports. The list is used
* to save the references to all ports, so that mx2_gpio_irq_handler
@@ -47,22 +133,6 @@ struct mxc_gpio_port {
*/
static LIST_HEAD(mxc_gpio_ports);
-#define cpu_is_mx1_mx2() (cpu_is_mx1() || cpu_is_mx2())
-
-#define GPIO_DR (cpu_is_mx1_mx2() ? 0x1c : 0x00)
-#define GPIO_GDIR (cpu_is_mx1_mx2() ? 0x00 : 0x04)
-#define GPIO_PSR (cpu_is_mx1_mx2() ? 0x24 : 0x08)
-#define GPIO_ICR1 (cpu_is_mx1_mx2() ? 0x28 : 0x0C)
-#define GPIO_ICR2 (cpu_is_mx1_mx2() ? 0x2C : 0x10)
-#define GPIO_IMR (cpu_is_mx1_mx2() ? 0x30 : 0x14)
-#define GPIO_ISR (cpu_is_mx1_mx2() ? 0x34 : 0x18)
-
-#define GPIO_INT_LOW_LEV (cpu_is_mx1_mx2() ? 0x3 : 0x0)
-#define GPIO_INT_HIGH_LEV (cpu_is_mx1_mx2() ? 0x2 : 0x1)
-#define GPIO_INT_RISE_EDGE (cpu_is_mx1_mx2() ? 0x0 : 0x2)
-#define GPIO_INT_FALL_EDGE (cpu_is_mx1_mx2() ? 0x1 : 0x3)
-#define GPIO_INT_NONE 0x4
-
/* Note: This driver assumes 32 GPIOs are handled in one register */
static int gpio_set_irq_type(struct irq_data *d, u32 type)
@@ -236,12 +306,27 @@ static void __init mxc_gpio_init_gc(struct mxc_gpio_port *port)
IRQ_NOREQUEST, 0);
}
+static void __devinit mxc_gpio_get_hw(struct platform_device *pdev)
+{
+ if (mxc_gpio_hwdata)
+ return;
+
+ mxs_gpio_hwtype = pdev->id_entry->driver_data;
+
+ if (mxs_gpio_hwtype == IMX1_GPIO || mxs_gpio_hwtype == IMX2_GPIO)
+ mxc_gpio_hwdata = &imx1_imx2_gpio_hwdata;
+ else
+ mxc_gpio_hwdata = &imx_gpio_hwdata;
+}
+
static int __devinit mxc_gpio_probe(struct platform_device *pdev)
{
struct mxc_gpio_port *port;
struct resource *iores;
int err;
+ mxc_gpio_get_hw(pdev);
+
port = kzalloc(sizeof(struct mxc_gpio_port), GFP_KERNEL);
if (!port)
return -ENOMEM;
@@ -280,7 +365,7 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev)
/* gpio-mxc can be a generic irq chip */
mxc_gpio_init_gc(port);
- if (cpu_is_mx2()) {
+ if (mxs_gpio_hwtype == IMX2_GPIO) {
/* setup one handler for all GPIO interrupts */
if (pdev->id == 0)
irq_set_chained_handler(port->irq,
@@ -332,6 +417,7 @@ static struct platform_driver mxc_gpio_driver = {
.owner = THIS_MODULE,
},
.probe = mxc_gpio_probe,
+ .id_table = mxc_gpio_devtype,
};
static int __init gpio_mxc_init(void)
--
1.7.4.1
--
Regards,
Shawn
More information about the devicetree-discuss
mailing list