Re: [PATCH V4 5/8] SPEAr13xx: Fixup: Move SPEAr1340 SATA platformcode to phy driver

From: Pratyush Anand
Date: Thu Feb 06 2014 - 03:08:09 EST

On Thu, Feb 06, 2014 at 04:01:25PM +0800, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Thursday 06 February 2014 12:30 PM, Pratyush Anand wrote:
> > On Thu, Feb 06, 2014 at 02:32:42PM +0800, Kishon Vijay Abraham I wrote:
> >> Hi,
> >>
> >> On Thursday 06 February 2014 10:14 AM, Pratyush Anand wrote:
> >>> ahci driver needs some platform specific functions which are called at
> >>> init, exit, suspend and resume conditions. Till now these functions were
> >>> present in a platform driver with a fixme notes.
> >>>
> >>> Similar functions modifying same set of registers will also be needed in
> >>> case of PCIe phy init/exit.
> >>>
> >>> So move all these SATA platform code to phy-miphy40lp driver.
> >>>
> >>> Signed-off-by: Pratyush Anand <pratyush.anand@xxxxxx>
> >>> Tested-by: Mohit Kumar <mohit.kumar@xxxxxx>
> >>> Cc: Viresh Kumar <viresh.linux@xxxxxxxxx>
> >>> Cc: Tejun Heo <tj@xxxxxxxxxx>
> >>> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> >>> Cc: Kishon Vijay Abraham I <kishon@xxxxxx>
> >>> Cc: spear-devel@xxxxxxxxxxx
> >>> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> >>> Cc: devicetree@xxxxxxxxxxxxxxx
> >>> Cc: linux-ide@xxxxxxxxxxxxxxx
> >>> Cc: linux-kernel@xxxxxxxxxxxxxxx
> >>> ---
> >>> .../devicetree/bindings/arm/spear-misc.txt | 4 +
> >>> arch/arm/boot/dts/spear1310-evb.dts | 4 +
> >>> arch/arm/boot/dts/spear1310.dtsi | 39 +++-
> >>> arch/arm/boot/dts/spear1340-evb.dts | 4 +
> >>> arch/arm/boot/dts/spear1340.dtsi | 13 +-
> >>> arch/arm/boot/dts/spear13xx.dtsi | 5 +
> >>> arch/arm/mach-spear/Kconfig | 2 +
> >>> arch/arm/mach-spear/spear1340.c | 127 +------------
> >>> drivers/phy/phy-miphy40lp.c | 204 ++++++++++++++++++++-
> >>
> >> It would be better if you can split this patch. Keep arch/ in separate patch
> >> and drivers/ in separate patch.
> >
> > Code is actually moving from arch to driver. Therefore I kept it in
> > same patch.
> >
> >>> 9 files changed, 266 insertions(+), 136 deletions(-)
> >>> create mode 100644 Documentation/devicetree/bindings/arm/spear-misc.txt
> >>>
> >> .
> >> .
> >> <snip>
> >> .
> >> .
> >>> static const char * const spear1340_dt_board_compat[] = {
> >>> diff --git a/drivers/phy/phy-miphy40lp.c b/drivers/phy/phy-miphy40lp.c
> >>> index d478c14..cc7f45d 100644
> >>> --- a/drivers/phy/phy-miphy40lp.c
> >>> +++ b/drivers/phy/phy-miphy40lp.c
> >>> @@ -8,6 +8,7 @@
> >>> * it under the terms of the GNU General Public License version 2 as
> >>> * published by the Free Software Foundation.
> >>> *
> >>> + * 04/02/2014: Adding support of SATA mode for SPEAr1340.
> >>> */
> >>>
> >>> #include <linux/delay.h>
> >>> @@ -19,6 +20,60 @@
> >>> #include <linux/phy/phy.h>
> >>> #include <linux/regmap.h>
> >>>
> >>> +/* SPEAr1340 Registers */
> >>> +/* Power Management Registers */
> >>> +#define SPEAR1340_PCM_CFG 0x100
> >>> + #define SPEAR1340_PCM_CFG_SATA_POWER_EN 0x800
> >>> +#define SPEAR1340_PCM_WKUP_CFG 0x104
> >>> +#define SPEAR1340_SWITCH_CTR 0x108
> >>> +
> >>> +#define SPEAR1340_PERIP1_SW_RST 0x318
> >>> + #define SPEAR1340_PERIP1_SW_RST_SATA 0x1000
> >>> +#define SPEAR1340_PERIP2_SW_RST 0x31C
> >>> +#define SPEAR1340_PERIP3_SW_RST 0x320
> >>> +
> >>> +/* PCIE - SATA configuration registers */
> >>> +#define SPEAR1340_PCIE_SATA_CFG 0x424
> >>> + /* PCIE CFG MASks */
> >>> + #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11)
> >>
> >> use BIT() wherever possible.
> >
> > OK.
> >
> >>> + #define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10)
> >>> + #define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9)
> >>> + #define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8)
> >>> + #define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4)
> >>> + #define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3)
> >>> + #define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2)
> >>> + #define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1)
> >>> + #define SPEAR1340_PCIE_SATA_SEL_PCIE (0)
> >>> + #define SPEAR1340_PCIE_SATA_SEL_SATA (1)
> >>> + #define SPEAR1340_PCIE_SATA_CFG_MASK 0xF1F
> >>> + #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \
> >>> + SPEAR1340_PCIE_CFG_AUX_CLK_EN | \
> >>> + SPEAR1340_PCIE_CFG_CORE_CLK_EN | \
> >>> + SPEAR1340_PCIE_CFG_POWERUP_RESET | \
> >>> + SPEAR1340_PCIE_CFG_DEVICE_PRESENT)
> >>> + #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \
> >>> + SPEAR1340_SATA_CFG_PM_CLK_EN | \
> >>> + SPEAR1340_SATA_CFG_POWERUP_RESET | \
> >>> + SPEAR1340_SATA_CFG_RX_CLK_EN | \
> >>> + SPEAR1340_SATA_CFG_TX_CLK_EN)
> >>> +
> >>> +#define SPEAR1340_PCIE_MIPHY_CFG 0x428
> >>> + #define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31)
> >>> + #define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27)
> >>> + #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27)
> >>> + #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27)
> >>> + #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0)
> >>> + #define SPEAR1340_PCIE_MIPHY_CFG_MASK 0xF80000FF
> >>> + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \
> >>> + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
> >>> + SPEAR1340_MIPHY_CLK_REF_DIV2 | \
> >>> + SPEAR1340_MIPHY_PLL_RATIO_TOP(60))
> >>> + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \
> >>> + (SPEAR1340_MIPHY_PLL_RATIO_TOP(120))
> >>> + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \
> >>> + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
> >>> + SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
> >>> +
> >>> enum phy_mode {
> >>> SATA,
> >>> PCIE,
> >>> @@ -38,28 +93,145 @@ struct st_miphy40lp_priv {
> >>> u32 id;
> >>> };
> >>>
> >>> +static int spear1340_sata_miphy_init(struct st_miphy40lp_priv *phypriv)
> >>
> >> The function name format here differs from what you have already added. It will
> >> be good to have consistent name in the file.
> >
> > You mean to pass "struct phy *phy" in all the internal functions too?
>
> No. I meant let all the function names begin with miphy40lp_.

okkk.. miphy40lp_spear1340_sata_init looks better :)

Rgds
Pratyush

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