[alsa-devel] [PATCH v2 1/3] ARM: mx28evk: add platform data for saif
Uwe Kleine-König
u.kleine-koenig at pengutronix.de
Wed Sep 7 20:18:11 CEST 2011
Hello,
On Wed, Sep 07, 2011 at 09:57:36PM +0800, Dong Aisheng wrote:
> This is for supporting saif record function.
>
> Signed-off-by: Dong Aisheng <b29396 at freescale.com>
> Cc: Sascha Hauer <s.hauer at pengutronix.de>
> Cc: Wolfram Sang <w.sang at pengutronix.de>
> Cc: Mark Brown <broonie at opensource.wolfsonmicro.com>
> Cc: Liam Girdwood <lrg at ti.com>
>
> ---
> changes since v1:
> * move saif clkmux code into mach-specific part
> ---
> arch/arm/mach-mxs/clock-mx28.c | 47 +++++++++++++++++++++++
> arch/arm/mach-mxs/devices-mx28.h | 4 +-
> arch/arm/mach-mxs/devices/platform-mxs-saif.c | 5 +-
> arch/arm/mach-mxs/include/mach/common.h | 2 +
> arch/arm/mach-mxs/include/mach/devices-common.h | 4 +-
> arch/arm/mach-mxs/include/mach/digctl.h | 18 +++++++++
> arch/arm/mach-mxs/mach-mx28evk.c | 15 ++++++-
> 7 files changed, 89 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
> index 7954013..f0c7cb6 100644
> --- a/arch/arm/mach-mxs/clock-mx28.c
> +++ b/arch/arm/mach-mxs/clock-mx28.c
> @@ -29,6 +29,7 @@
> #include <mach/mx28.h>
> #include <mach/common.h>
> #include <mach/clock.h>
> +#include <mach/digctl.h>
>
> #include "regs-clkctrl-mx28.h"
>
> @@ -43,6 +44,52 @@ static struct clk emi_clk;
> static struct clk saif0_clk;
> static struct clk saif1_clk;
> static struct clk clk32k_clk;
> +static unsigned int saif_clkmux;
> +
> +/*
> + * HW_SAIF_CLKMUX_SEL:
> + * DIRECT(0x0): SAIF0 clock pins selected for SAIF0 input clocks, and SAIF1
> + * clock pins selected for SAIF1 input clocks.
> + * CROSSINPUT(0x1): SAIF1 clock inputs selected for SAIF0 input clocks, and
> + * SAIF0 clock inputs selected for SAIF1 input clocks.
> + * EXTMSTR0(0x2): SAIF0 clock pin selected for both SAIF0 and SAIF1 input
> + * clocks.
> + * EXTMSTR1(0x3): SAIF1 clock pin selected for both SAIF0 and SAIF1 input
> + * clocks.
> + */
> +int mxs_saif_clkmux_select(unsigned int clkmux)
> +{
> + if (clkmux > 0x3)
> + return -EINVAL;
> +
> + __raw_writel(clkmux << 10, DIGCTRL_BASE_ADDR + MXS_SET_ADDR);
hmm, in my version of the mx28 reference the module is named DIGCTL?!
shouldn't that be something like:
DIGCTRL_BASE_ADDR + DIGCTRL_CTRL + MXS_SET_ADDR?
and is it intended that if you do:
mxs_saif_clkmux_select(1);
mxs_saif_clkmux_select(2);
the SAIF_CLKMUX_SEL bitfield ends up being 3?
> + saif_clkmux = clkmux;
> + return 0;
> +}
> +
> +int mxs_get_saif_clk_master_id(unsigned int saif_id)
> +{
> + unsigned int master_id;
> +
> + switch (saif_clkmux) {
> + case MXS_DIGCTL_SAIF_CLKMUX_DIRECT:
> + master_id = saif_id;
> + break;
> + case MXS_DIGCTL_SAIF_CLKMUX_CROSSINPUT:
> + master_id = saif_id ? 0 : 1;
> + break;
> + case MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0:
> + master_id = 0;
> + break;
> + case MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR1:
> + master_id = 1;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return master_id;
> +}
These two functions are only supposed to be called by arch code right?
(If not, you might need to export them.)
>
> static int _raw_clk_enable(struct clk *clk)
> {
> diff --git a/arch/arm/mach-mxs/devices-mx28.h b/arch/arm/mach-mxs/devices-mx28.h
> index c888710..40be649 100644
> --- a/arch/arm/mach-mxs/devices-mx28.h
> +++ b/arch/arm/mach-mxs/devices-mx28.h
> @@ -47,6 +47,8 @@ struct platform_device *__init mx28_add_mxsfb(
> const struct mxsfb_platform_data *pdata);
>
> extern const struct mxs_saif_data mx28_saif_data[] __initconst;
> -#define mx28_add_saif(id) mxs_add_saif(&mx28_saif_data[id])
> +#define mx28_add_saif(id, pdata) \
> + mxs_add_saif(&mx28_saif_data[id], pdata)
should it be a seperate patch to add pdata for saif devices?
> +
undesirable empty line.
>
> struct platform_device *__init mx28_add_rtc_stmp3xxx(void);
> diff --git a/arch/arm/mach-mxs/devices/platform-mxs-saif.c b/arch/arm/mach-mxs/devices/platform-mxs-saif.c
> index 1ec965e..f6e3a60 100644
> --- a/arch/arm/mach-mxs/devices/platform-mxs-saif.c
> +++ b/arch/arm/mach-mxs/devices/platform-mxs-saif.c
> @@ -32,7 +32,8 @@ const struct mxs_saif_data mx28_saif_data[] __initconst = {
> };
> #endif
>
> -struct platform_device *__init mxs_add_saif(const struct mxs_saif_data *data)
> +struct platform_device *__init mxs_add_saif(const struct mxs_saif_data *data,
> + const struct mxs_saif_platform_data *pdata)
> {
> struct resource res[] = {
> {
> @@ -56,5 +57,5 @@ struct platform_device *__init mxs_add_saif(const struct mxs_saif_data *data)
> };
>
> return mxs_add_platform_device("mxs-saif", data->id, res,
> - ARRAY_SIZE(res), NULL, 0);
> + ARRAY_SIZE(res), pdata, sizeof(*pdata));
> }
> diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h
> index 635bb5d..bf91a10 100644
> --- a/arch/arm/mach-mxs/include/mach/common.h
> +++ b/arch/arm/mach-mxs/include/mach/common.h
> @@ -29,4 +29,6 @@ extern void mx28_init_irq(void);
>
> extern void icoll_init_irq(void);
>
> +extern int mxs_saif_clkmux_select(unsigned int clkmux);
> +extern int mxs_get_saif_clk_master_id(unsigned int saif_id);
> #endif /* __MACH_MXS_COMMON_H__ */
> diff --git a/arch/arm/mach-mxs/include/mach/devices-common.h b/arch/arm/mach-mxs/include/mach/devices-common.h
> index a8080f4..dc369c1 100644
> --- a/arch/arm/mach-mxs/include/mach/devices-common.h
> +++ b/arch/arm/mach-mxs/include/mach/devices-common.h
> @@ -94,6 +94,7 @@ struct platform_device *__init mxs_add_mxs_pwm(
> resource_size_t iobase, int id);
>
> /* saif */
> +#include <sound/saif.h>
> struct mxs_saif_data {
> int id;
> resource_size_t iobase;
> @@ -103,4 +104,5 @@ struct mxs_saif_data {
> };
>
> struct platform_device *__init mxs_add_saif(
> - const struct mxs_saif_data *data);
> + const struct mxs_saif_data *data,
> + const struct mxs_saif_platform_data *pdata);
> diff --git a/arch/arm/mach-mxs/include/mach/digctl.h b/arch/arm/mach-mxs/include/mach/digctl.h
> new file mode 100644
> index 0000000..6231e10
> --- /dev/null
> +++ b/arch/arm/mach-mxs/include/mach/digctl.h
> @@ -0,0 +1,18 @@
> +/*
> + * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef __MACH_DIGCTL_H__
> +#define __MACH_DIGCTL_H__
> +
> +/* MXS DIGCTL SAIF CLKMUX */
> +#define MXS_DIGCTL_SAIF_CLKMUX_DIRECT 0x0
> +#define MXS_DIGCTL_SAIF_CLKMUX_CROSSINPUT 0x1
> +#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0 0x2
> +#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR1 0x3
> +
> +#endif
> diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
> index 4a3cca3..6affe5d 100644
> --- a/arch/arm/mach-mxs/mach-mx28evk.c
> +++ b/arch/arm/mach-mxs/mach-mx28evk.c
> @@ -28,6 +28,7 @@
>
> #include <mach/common.h>
> #include <mach/iomux-mx28.h>
> +#include <mach/digctl.h>
>
> #include "devices-mx28.h"
>
> @@ -417,6 +418,16 @@ static void __init mx28evk_add_regulators(void)
> static void __init mx28evk_add_regulators(void) {}
> #endif
>
> +static int mx28evk_mxs_saif_pinit(void)
> +{
> + return mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
> +}
> +
> +struct mxs_saif_platform_data mx28evk_mxs_saif_pdata __initdata = {
const + __initconst?
> + .init = mx28evk_mxs_saif_pinit,
> + .get_master_id = mxs_get_saif_clk_master_id,
> +};
> +
> static void __init mx28evk_init(void)
> {
> int ret;
> @@ -457,8 +468,8 @@ static void __init mx28evk_init(void)
>
> mx28_add_mxsfb(&mx28evk_mxsfb_pdata);
>
> - mx28_add_saif(0);
> - mx28_add_saif(1);
> + mx28_add_saif(0, &mx28evk_mxs_saif_pdata);
> + mx28_add_saif(1, &mx28evk_mxs_saif_pdata);
>
> mx28_add_mxs_i2c(0);
> i2c_register_board_info(0, mxs_i2c0_board_info,
> --
> 1.7.0.4
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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