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author | Sergio Paracuellos <sergio.paracuellos@gmail.com> | 2019-04-17 13:58:38 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-19 15:01:34 +0200 |
commit | 36d657b011ef49b549aae44d0fe49ce845beb975 (patch) | |
tree | f734ae3dfb2ab48e42b2f19cdf794f09eec403c5 /drivers/staging/mt7621-pci-phy | |
parent | 9445ccb3714c78c26a3a25fafed4d9d965080431 (diff) | |
download | linux-36d657b011ef49b549aae44d0fe49ce845beb975.tar.gz linux-36d657b011ef49b549aae44d0fe49ce845beb975.tar.bz2 linux-36d657b011ef49b549aae44d0fe49ce845beb975.zip |
staging: mt7621-pci-phy: convert driver to use kernel regmap API's
Instead of using writel and readl use regmap API which makes
the driver maintainability easier.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/mt7621-pci-phy')
-rw-r--r-- | drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c | 88 |
1 files changed, 54 insertions, 34 deletions
diff --git a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c index f762369d6792..2576f179e30a 100644 --- a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c +++ b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c @@ -11,6 +11,7 @@ #include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/sys_soc.h> #include <mt7621.h> #include <ralink_regs.h> @@ -95,6 +96,7 @@ struct mt7621_pci_phy_instance { /** * struct mt7621_pci_phy - Mt7621 Pcie PHY core * @dev: pointer to device + * @regmap: kernel regmap pointer * @phys: pointer to Mt7621 PHY device * @nphys: number of PHY devices for this core * @bypass_pipe_rst: mark if 'mt7621_bypass_pipe_rst' @@ -102,20 +104,24 @@ struct mt7621_pci_phy_instance { */ struct mt7621_pci_phy { struct device *dev; + struct regmap *regmap; struct mt7621_pci_phy_instance **phys; int nphys; bool bypass_pipe_rst; }; -static inline u32 phy_read(struct mt7621_pci_phy_instance *instance, u32 reg) +static inline u32 phy_read(struct mt7621_pci_phy *phy, u32 reg) { - return readl(instance->port_base + reg); + u32 val; + + regmap_read(phy->regmap, reg, &val); + + return val; } -static inline void phy_write(struct mt7621_pci_phy_instance *instance, - u32 val, u32 reg) +static inline void phy_write(struct mt7621_pci_phy *phy, u32 val, u32 reg) { - writel(val, instance->port_base + reg); + regmap_write(phy->regmap, reg, val); } static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy, @@ -125,10 +131,10 @@ static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy, RG_PE1_PIPE_REG : RG_PE1_PIPE_REG + RG_P0_TO_P1_WIDTH; u32 reg; - reg = phy_read(instance, offset); + reg = phy_read(phy, offset); reg &= ~(RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC); reg |= (RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC); - phy_write(instance, reg, offset); + phy_write(phy, reg, offset); } static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy, @@ -142,72 +148,72 @@ static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy, reg = (reg >> 6) & 0x7; /* Set PCIe Port PHY to disable SSC */ /* Debug Xtal Type */ - val = phy_read(instance, RG_PE1_FRC_H_XTAL_REG); + val = phy_read(phy, RG_PE1_FRC_H_XTAL_REG); val &= ~(RG_PE1_FRC_H_XTAL_TYPE | RG_PE1_H_XTAL_TYPE); val |= RG_PE1_FRC_H_XTAL_TYPE; val |= RG_PE1_H_XTAL_TYPE_VAL(0x00); - phy_write(instance, val, RG_PE1_FRC_H_XTAL_REG); + phy_write(phy, val, RG_PE1_FRC_H_XTAL_REG); /* disable port */ offset = (instance->index != 1) ? RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH; - val = phy_read(instance, offset); + val = phy_read(phy, offset); val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN); val |= RG_PE1_FRC_PHY_EN; - phy_write(instance, val, offset); + phy_write(phy, val, offset); /* Set Pre-divider ratio (for host mode) */ - val = phy_read(instance, RG_PE1_H_PLL_REG); + val = phy_read(phy, RG_PE1_H_PLL_REG); val &= ~(RG_PE1_H_PLL_PREDIV); if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */ val |= RG_PE1_H_PLL_PREDIV_VAL(0x01); - phy_write(instance, val, RG_PE1_H_PLL_REG); + phy_write(phy, val, RG_PE1_H_PLL_REG); dev_info(dev, "Xtal is 40MHz\n"); } else { /* 25MHz | 20MHz Xtal */ val |= RG_PE1_H_PLL_PREDIV_VAL(0x00); - phy_write(instance, val, RG_PE1_H_PLL_REG); + phy_write(phy, val, RG_PE1_H_PLL_REG); if (reg >= 6) { dev_info(dev, "Xtal is 25MHz\n"); /* Select feedback clock */ - val = phy_read(instance, RG_PE1_H_PLL_FBKSEL_REG); + val = phy_read(phy, RG_PE1_H_PLL_FBKSEL_REG); val &= ~(RG_PE1_H_PLL_FBKSEL); val |= RG_PE1_H_PLL_FBKSEL_VAL(0x01); - phy_write(instance, val, RG_PE1_H_PLL_FBKSEL_REG); + phy_write(phy, val, RG_PE1_H_PLL_FBKSEL_REG); /* DDS NCPO PCW (for host mode) */ - val = phy_read(instance, RG_PE1_H_LCDDS_SSC_PRD_REG); + val = phy_read(phy, RG_PE1_H_LCDDS_SSC_PRD_REG); val &= ~(RG_PE1_H_LCDDS_SSC_PRD); val |= RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18000000); - phy_write(instance, val, RG_PE1_H_LCDDS_SSC_PRD_REG); + phy_write(phy, val, RG_PE1_H_LCDDS_SSC_PRD_REG); /* DDS SSC dither period control */ - val = phy_read(instance, RG_PE1_H_LCDDS_SSC_PRD_REG); + val = phy_read(phy, RG_PE1_H_LCDDS_SSC_PRD_REG); val &= ~(RG_PE1_H_LCDDS_SSC_PRD); val |= RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18d); - phy_write(instance, val, RG_PE1_H_LCDDS_SSC_PRD_REG); + phy_write(phy, val, RG_PE1_H_LCDDS_SSC_PRD_REG); /* DDS SSC dither amplitude control */ - val = phy_read(instance, RG_PE1_H_LCDDS_SSC_DELTA_REG); + val = phy_read(phy, RG_PE1_H_LCDDS_SSC_DELTA_REG); val &= ~(RG_PE1_H_LCDDS_SSC_DELTA | RG_PE1_H_LCDDS_SSC_DELTA1); val |= RG_PE1_H_LCDDS_SSC_DELTA_VAL(0x4a); val |= RG_PE1_H_LCDDS_SSC_DELTA1_VAL(0x4a); - phy_write(instance, val, RG_PE1_H_LCDDS_SSC_DELTA_REG); + phy_write(phy, val, RG_PE1_H_LCDDS_SSC_DELTA_REG); } else { dev_info(dev, "Xtal is 20MHz\n"); } } /* DDS clock inversion */ - val = phy_read(instance, RG_PE1_LCDDS_CLK_PH_INV_REG); + val = phy_read(phy, RG_PE1_LCDDS_CLK_PH_INV_REG); val &= ~(RG_PE1_LCDDS_CLK_PH_INV); val |= RG_PE1_LCDDS_CLK_PH_INV; - phy_write(instance, val, RG_PE1_LCDDS_CLK_PH_INV_REG); + phy_write(phy, val, RG_PE1_LCDDS_CLK_PH_INV_REG); /* Set PLL bits */ - val = phy_read(instance, RG_PE1_H_PLL_REG); + val = phy_read(phy, RG_PE1_H_PLL_REG); val &= ~(RG_PE1_H_PLL_BC | RG_PE1_H_PLL_BP | RG_PE1_H_PLL_IR | RG_PE1_H_PLL_IC | RG_PE1_PLL_DIVEN); val |= RG_PE1_H_PLL_BC_VAL(0x02); @@ -215,19 +221,19 @@ static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy, val |= RG_PE1_H_PLL_IR_VAL(0x02); val |= RG_PE1_H_PLL_IC_VAL(0x01); val |= RG_PE1_PLL_DIVEN_VAL(0x02); - phy_write(instance, val, RG_PE1_H_PLL_REG); + phy_write(phy, val, RG_PE1_H_PLL_REG); - val = phy_read(instance, RG_PE1_H_PLL_BR_REG); + val = phy_read(phy, RG_PE1_H_PLL_BR_REG); val &= ~(RG_PE1_H_PLL_BR); val |= RG_PE1_H_PLL_BR_VAL(0x00); - phy_write(instance, val, RG_PE1_H_PLL_BR_REG); + phy_write(phy, val, RG_PE1_H_PLL_BR_REG); if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */ /* set force mode enable of da_pe1_mstckdiv */ - val = phy_read(instance, RG_PE1_MSTCKDIV_REG); + val = phy_read(phy, RG_PE1_MSTCKDIV_REG); val &= ~(RG_PE1_MSTCKDIV | RG_PE1_FRC_MSTCKDIV); val |= (RG_PE1_MSTCKDIV_VAL(0x01) | RG_PE1_FRC_MSTCKDIV); - phy_write(instance, val, RG_PE1_MSTCKDIV_REG); + phy_write(phy, val, RG_PE1_MSTCKDIV_REG); } } @@ -247,15 +253,16 @@ static int mt7621_pci_phy_init(struct phy *phy) static int mt7621_pci_phy_power_on(struct phy *phy) { struct mt7621_pci_phy_instance *instance = phy_get_drvdata(phy); + struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent); u32 offset = (instance->index != 1) ? RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH; u32 val; /* Enable PHY and disable force mode */ - val = phy_read(instance, offset); + val = phy_read(mphy, offset); val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN); val |= (RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN); - phy_write(instance, val, offset); + phy_write(mphy, val, offset); return 0; } @@ -263,15 +270,16 @@ static int mt7621_pci_phy_power_on(struct phy *phy) static int mt7621_pci_phy_power_off(struct phy *phy) { struct mt7621_pci_phy_instance *instance = phy_get_drvdata(phy); + struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent); u32 offset = (instance->index != 1) ? RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH; u32 val; /* Disable PHY */ - val = phy_read(instance, offset); + val = phy_read(mphy, offset); val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN); val |= RG_PE1_FRC_PHY_EN; - phy_write(instance, val, offset); + phy_write(mphy, val, offset); return 0; } @@ -311,6 +319,13 @@ static const struct soc_device_attribute mt7621_pci_quirks_match[] = { { .soc_id = "mt7621", .revision = "E2" } }; +static const struct regmap_config mt7621_pci_phy_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x700, +}; + static int mt7621_pci_phy_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -350,6 +365,11 @@ static int mt7621_pci_phy_probe(struct platform_device *pdev) return PTR_ERR(port_base); } + phy->regmap = devm_regmap_init_mmio(phy->dev, port_base, + &mt7621_pci_phy_regmap_config); + if (IS_ERR(phy->regmap)) + return PTR_ERR(phy->regmap); + for (port = 0; port < MAX_PHYS; port++) { struct mt7621_pci_phy_instance *instance; struct phy *pphy; |