[PATCH v2] mfd: rtsx: fix PM suspend for 5227 & 5249

Lee Jones lee.jones at linaro.org
Fri Oct 10 10:21:04 UTC 2014


On Fri, 10 Oct 2014, micky_ching at realsil.com.cn wrote:

> From: Micky Ching <micky_ching at realsil.com.cn>
> 
> Fix rts5227&5249 failed send buffer cmd after suspend,
> PM_CTRL3 should reset before send any buffer cmd after suspend.
> Otherwise, buffer cmd will failed, this will lead resume fail.
> 
> Signed-off-by: Micky Ching <micky_ching at realsil.com.cn>
> ---
>  drivers/mfd/Makefile         |  2 +-
>  drivers/mfd/rts5227.c        |  6 ++++++
>  drivers/mfd/rts5249.c        |  4 ++++
>  drivers/mfd/rtsx_gops.c      | 37 +++++++++++++++++++++++++++++++++++++
>  drivers/mfd/rtsx_pcr.h       |  3 +++
>  include/linux/mfd/rtsx_pci.h | 28 ++++++++++++++++++++++++++++
>  6 files changed, 79 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/mfd/rtsx_gops.c

[...]

> +static inline int rtsx_pci_update_cfg_byte(struct rtsx_pcr *pcr, int addr,
> +		u8 mask, u8 append)
> +{
> +	int err;
> +	u8 val;
> +
> +	err = pci_read_config_byte(pcr->pci, addr, &val);
> +	if (err < 0)
> +		return err;
> +	return pci_write_config_byte(pcr->pci, addr, (val & mask) | append);
> +}
> +

Why is this in here?  Why not put it in the generic ops file?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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