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phy: phy-brcm-sata: Allow configuration SATA AFE TX amplitude

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Read the 'brcm,tx-amplitude-millivolt' property from Device Tree and
propagate its value into the appropriate test transmit register to
change the TX amplitude.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20201022205056.233879-3-f.fainelli@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Florian Fainelli 2020-10-22 13:50:56 -07:00 committed by Vinod Koul
parent 6d3b3f8842
commit 839034d8bd
1 changed files with 32 additions and 0 deletions
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32
drivers/phy/broadcom/phy-brcm-sata.c
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@ -65,6 +65,7 @@ struct brcm_sata_port {
bool ssc_en;
enum brcm_sata_phy_rxaeq_mode rxaeq_mode;
u32 rxaeq_val;
u32 tx_amplitude_val;
};
struct brcm_sata_phy {
@ -84,6 +85,10 @@ enum sata_phy_regs {
BLOCK0_SPARE_OOB_CLK_SEL_MASK = 0x3,
BLOCK0_SPARE_OOB_CLK_SEL_REFBY2 = 0x1,
BLOCK1_REG_BANK = 0x10,
BLOCK1_TEST_TX = 0x83,
BLOCK1_TEST_TX_AMP_SHIFT = 12,
PLL_REG_BANK_0 = 0x050,
PLL_REG_BANK_0_PLLCONTROL_0 = 0x81,
PLLCONTROL_0_FREQ_DET_RESTART = BIT(13),
@ -379,6 +384,29 @@ static int brcm_stb_sata_16nm_ssc_init(struct brcm_sata_port *port)
brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
~tmp, RXPMD_MON_CORRECT_EN | value);
tmp = GENMASK(15, 12);
switch (port->tx_amplitude_val) {
case 400:
value = BIT(12) | BIT(13);
break;
case 500:
value = BIT(13);
break;
case 600:
value = BIT(12);
break;
case 800:
value = 0;
break;
default:
value = tmp;
break;
}
if (value != tmp)
brcm_sata_phy_wr(port, BLOCK1_REG_BANK, BLOCK1_TEST_TX, ~tmp,
value);
/* Turn on/off SSC */
brcm_sata_phy_wr(port, TX_REG_BANK, TX_ACTRL5, ~TX_ACTRL5_SSC_EN,
port->ssc_en ? TX_ACTRL5_SSC_EN : 0);
@ -787,6 +815,10 @@ static int brcm_sata_phy_probe(struct platform_device *pdev)
if (port->rxaeq_mode == RXAEQ_MODE_MANUAL)
of_property_read_u32(child, "brcm,rxaeq-value",
&port->rxaeq_val);
of_property_read_u32(child, "brcm,tx-amplitude-millivolt",
&port->tx_amplitude_val);
port->ssc_en = of_property_read_bool(child, "brcm,enable-ssc");
if (IS_ERR(port->phy)) {
dev_err(dev, "failed to create PHY\n");