[RFC PATCH 1/2] AHCI Add the AHCI SATA feature on MX53 platforms

[Sascha Hauer]

On Mon, Mar 14, 2011 at 05:55:43PM +0800, Richard Zhu wrote:
> Signed-off-by: Richard Zhu <Hong-Xing.Zhu at freescale.com>
> ---
>  arch/arm/mach-mx5/clock-mx51-mx53.c             |   11 +++++
>  arch/arm/mach-mx5/devices-imx53.h               |    4 ++
>  arch/arm/plat-mxc/devices/Kconfig               |    4 ++
>  arch/arm/plat-mxc/devices/Makefile              |    1 +
>  arch/arm/plat-mxc/devices/platform-ahci-imx.c   |   55 +++++++++++++++++++++++
>  arch/arm/plat-mxc/include/mach/ahci_sata.h      |   51 +++++++++++++++++++++
>  arch/arm/plat-mxc/include/mach/devices-common.h |   10 ++++
>  7 files changed, 136 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/plat-mxc/devices/platform-ahci-imx.c
>  create mode 100644 arch/arm/plat-mxc/include/mach/ahci_sata.h
> 
> diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
> index 652ace4..2b3d27c 100644
> --- a/arch/arm/mach-mx5/clock-mx51-mx53.c
> +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
> @@ -1380,6 +1380,14 @@ static struct clk esdhc4_mx53_clk = {
>  	.secondary = &esdhc4_ipg_clk,
>  };
>  
> +static struct clk sata_clk = {
> +	.parent = &ipg_clk,
> +	.enable = _clk_max_enable,
> +	.enable_reg = MXC_CCM_CCGR4,
> +	.enable_shift = MXC_CCM_CCGRx_CG1_OFFSET,
> +	.disable = _clk_max_disable,
> +};
> +
>  DEFINE_CLOCK(mipi_esc_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG5_OFFSET, NULL, NULL, NULL, &pll2_sw_clk);
>  DEFINE_CLOCK(mipi_hsc2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG4_OFFSET, NULL, NULL, &mipi_esc_clk, &pll2_sw_clk);
>  DEFINE_CLOCK(mipi_hsc1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG3_OFFSET, NULL, NULL, &mipi_hsc2_clk, &pll2_sw_clk);
> @@ -1468,6 +1476,9 @@ static struct clk_lookup mx53_lookups[] = {
>  	_REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk)
>  	_REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)
>  	_REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk)
> +	_REGISTER_CLOCK(NULL, "imx_sata_clk", sata_clk)

help!

The NULL pointer here really should be "ahci" to associate this clock
with the device it is used with. Then think about the "imx_sata_clk" string.
The information "imx" is not relevant. "sata" is redundant as it is
already associated with the ahci device. We are talking about a field
in clocks, so no need for "clk". This should read:

	_REGISTER_CLOCK("ahci", NULL, sata_clk)

> +	_REGISTER_CLOCK(NULL, "usb_phy1", usb_phy1_clk)
> +	_REGISTER_CLOCK(NULL, "ahb_clk", ahb_clk)

no _clk please.

>  };
>  
>  static void clk_tree_init(void)
> diff --git a/arch/arm/mach-mx5/devices-imx53.h b/arch/arm/mach-mx5/devices-imx53.h
> index 9251008..09ebb43 100644
> --- a/arch/arm/mach-mx5/devices-imx53.h
> +++ b/arch/arm/mach-mx5/devices-imx53.h
> @@ -33,3 +33,7 @@ extern const struct imx_spi_imx_data imx53_ecspi_data[] __initconst;
>  extern const struct imx_imx2_wdt_data imx53_imx2_wdt_data[] __initconst;
>  #define imx53_add_imx2_wdt(id, pdata)	\
>  	imx_add_imx2_wdt(&imx53_imx2_wdt_data[id])
> +
> +extern const struct imx_ahci_imx_data imx53_ahci_imx_data[] __initconst;
> +#define imx53_add_ahci_imx(id, pdata)   \
> +	imx_add_ahci_imx(&imx53_ahci_imx_data[id], pdata)
> diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
> index b9ab1d5..087595a 100644
> --- a/arch/arm/plat-mxc/devices/Kconfig
> +++ b/arch/arm/plat-mxc/devices/Kconfig
> @@ -71,3 +71,7 @@ config IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
>  
>  config IMX_HAVE_PLATFORM_SPI_IMX
>  	bool
> +
> +config IMX_HAVE_PLATFORM_SATA_AHCI
> +	bool
> +	default y if SOC_IMX53
> diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
> index 75cd2ec..e0b7fa3 100644
> --- a/arch/arm/plat-mxc/devices/Makefile
> +++ b/arch/arm/plat-mxc/devices/Makefile
> @@ -22,3 +22,4 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_RNGA) += platform-mxc_rnga.o
>  obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_W1) += platform-mxc_w1.o
>  obj-$(CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX) += platform-sdhci-esdhc-imx.o
>  obj-$(CONFIG_IMX_HAVE_PLATFORM_SPI_IMX) +=  platform-spi_imx.o
> +obj-$(CONFIG_IMX_HAVE_PLATFORM_SATA_AHCI) +=  platform-ahci-imx.o
> +
> +#ifdef CONFIG_SOC_IMX53
> +const struct imx_ahci_imx_data imx53_ahci_imx_data __initconst =
> +	imx_ahci_data_entry_single(MX53);
> +#endif
> +
> +struct platform_device *__init imx_add_ahci_imx(
> +		const struct imx_ahci_imx_data *data,
> +		const struct ahci_platform_data *pdata)
> +{
> +	struct resource res[] = {
> +		{
> +			.start = data->iobase,
> +			.end = data->iobase + SZ_4K - 1,
> +			.flags = IORESOURCE_MEM,
> +		}, {
> +			.start = data->irq,
> +			.end = data->irq,
> +			.flags = IORESOURCE_IRQ,
> +		},
> +	};
> +
> +	return imx_add_platform_device_dmamask("ahci", 0 /* -1? */,

I think it doesn't matter much if you use o or -1 here, but please
remove the comment. btw if you keep 0 here you must use "ahci.0" in
registering the clock.


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