On Fri, 12 Sep 2014, micky_ching@xxxxxxxxxxxxxx wrote:
> From: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
>
> Fix rts5227 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@xxxxxxxxxxxxxx>
> ---
> drivers/mfd/rts5227.c | 19 +++++++++++++++++++
> include/linux/mfd/rtsx_pci.h | 12 ++++++++++++
> 2 files changed, 31 insertions(+)
>
> diff --git a/drivers/mfd/rts5227.c b/drivers/mfd/rts5227.c
> index 9c8eec8..197f5c1 100644
> --- a/drivers/mfd/rts5227.c
> +++ b/drivers/mfd/rts5227.c
> @@ -128,8 +128,27 @@ static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
> return rtsx_pci_send_cmd(pcr, 100);
> }
>
> +static int rts5227_pm_reset(struct rtsx_pcr *pcr)
> +{
> + int err;
> +
> + /* init aspm */
> + err = rtsx_pci_update_cfg_byte(pcr, LCTLR, 0xFC, 0);
> + if (err < 0)
> + return err;
> +
> + /* reset PM_CTRL3 before send buffer cmd */
> + return rtsx_pci_write_register(pcr, PM_CTRL3, 0x10, 0x00);
> +}
> +
This is exactly the same function as in the other patch. Please place
it somewhere it can be referenced by both drivers.
> static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
> {
> + int err;
> +
> + err = rts5227_pm_reset(pcr);
> + if (err < 0)
> + return err;
> +
> /* Optimize RX sensitivity */
> return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
> }
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 74346d5..b34fec8 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -967,4 +967,16 @@ static inline u8 *rtsx_pci_get_cmd_data(struct rtsx_pcr *pcr)
> return (u8 *)(pcr->host_cmds_ptr);
> }
>
> +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);
> +}
> +
> #endif
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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