From mboxrd@z Thu Jan 1 00:00:00 1970 From: narmstrong@baylibre.com (Neil Armstrong) Date: Thu, 7 Dec 2017 16:49:04 +0100 Subject: [PATCH net-next v2 3/8] net: phy: meson-gxl: add read and write helpers for bank registers In-Reply-To: <20171207154610.GG24750@lunn.ch> References: <20171207142715.32578-1-jbrunet@baylibre.com> <20171207142715.32578-4-jbrunet@baylibre.com> <20171207154610.GG24750@lunn.ch> Message-ID: <2d1715d6-5754-0fcd-5810-fbcc6ce307ec@baylibre.com> To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org On 07/12/2017 16:46, Andrew Lunn wrote: > On Thu, Dec 07, 2017 at 03:27:10PM +0100, Jerome Brunet wrote: >> Add read and write helpers to manipulate banked registers on this PHY >> This helps clarify the settings applied to these registers in the init >> function and upcoming changes. >> >> Signed-off-by: Jerome Brunet >> --- >> drivers/net/phy/meson-gxl.c | 103 ++++++++++++++++++++++++++++---------------- >> 1 file changed, 67 insertions(+), 36 deletions(-) >> >> diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c >> index d82aa8cea401..05054770aefb 100644 >> --- a/drivers/net/phy/meson-gxl.c >> +++ b/drivers/net/phy/meson-gxl.c >> @@ -45,11 +45,13 @@ >> #define FR_PLL_DIV0 0x1c >> #define FR_PLL_DIV1 0x1d >> >> -static int meson_gxl_config_init(struct phy_device *phydev) >> +static int meson_gxl_open_banks(struct phy_device *phydev) > > Hi Jerome > > Does the word bank come from the datasheet? Most of the phy drives use > page instead. Yes, it's explicitly described as banks in the datasheet. Neil > > Also, we have discovered a race condition which affects drivers using > pages, which can lead to corruption of registers. At some point, i > expect we will be adding helpers to access paged registers, which do > the right thing with respect to locks. > > So it would be nice if you used the work page, not bank. > > Thanks > > Andrew > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >