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phy: ralink: phy-mt7621-pci: use kernel clock APIS 

MT7621 SoC clock driver has already mainlined in
'commit 48df7a26f4 ("clk: ralink: add clock driver for mt7621 SoC")'
This allow us to properly use kernel clock apis to get
the clock frequency needed for the phy configuration
instead of use custom architecture code to do the same.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20210508070930.5290-4-sergio.paracuellos@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sergio Paracuellos 2021-05-08 09:09:27 +02:00 committed by Vinod Koul
parent 77945a345a
commit 60ece833cc
1 changed files with 20 additions and 13 deletions
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33
drivers/phy/ralink/phy-mt7621-pci.c
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@ -5,6 +5,7 @@
*/
#include <dt-bindings/phy/phy.h>
#include <linux/clk.h>
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/module.h>
@ -14,8 +15,6 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/sys_soc.h>
#include <mt7621.h>
#include <ralink_regs.h>
#define RG_PE1_PIPE_REG 0x02c
#define RG_PE1_PIPE_RST BIT(12)
@ -62,8 +61,6 @@
#define RG_PE1_FRC_MSTCKDIV BIT(5)
#define XTAL_MASK GENMASK(8, 6)
#define MAX_PHYS 2
/**
@ -71,6 +68,7 @@
* @dev: pointer to device
* @regmap: kernel regmap pointer
* @phy: pointer to the kernel PHY device
* @sys_clk: pointer to the system XTAL clock
* @port_base: base register
* @has_dual_port: if the phy has dual ports.
* @bypass_pipe_rst: mark if 'mt7621_bypass_pipe_rst'
@ -80,6 +78,7 @@ struct mt7621_pci_phy {
struct device *dev;
struct regmap *regmap;
struct phy *phy;
struct clk *sys_clk;
void __iomem *port_base;
bool has_dual_port;
bool bypass_pipe_rst;
@ -116,12 +115,14 @@ static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy)
}
}
static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
static int mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
{
struct device *dev = phy->dev;
u32 xtal_mode;
unsigned long clk_rate;
xtal_mode = FIELD_GET(XTAL_MASK, rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0));
clk_rate = clk_get_rate(phy->sys_clk);
if (!clk_rate)
return -EINVAL;
/* Set PCIe Port PHY to disable SSC */
/* Debug Xtal Type */
@ -139,13 +140,13 @@ static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
}
if (xtal_mode <= 5 && xtal_mode >= 3) { /* 40MHz Xtal */
if (clk_rate == 40000000) { /* 40MHz Xtal */
/* Set Pre-divider ratio (for host mode) */
mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG, RG_PE1_H_PLL_PREDIV,
FIELD_PREP(RG_PE1_H_PLL_PREDIV, 0x01));
dev_dbg(dev, "Xtal is 40MHz\n");
} else if (xtal_mode >= 6) { /* 25MHz Xal */
} else if (clk_rate == 25000000) { /* 25MHz Xal */
mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG, RG_PE1_H_PLL_PREDIV,
FIELD_PREP(RG_PE1_H_PLL_PREDIV, 0x00));
@ -196,13 +197,15 @@ static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
mt7621_phy_rmw(phy, RG_PE1_H_PLL_BR_REG, RG_PE1_H_PLL_BR,
FIELD_PREP(RG_PE1_H_PLL_BR, 0x00));
if (xtal_mode <= 5 && xtal_mode >= 3) { /* 40MHz Xtal */
if (clk_rate == 40000000) { /* 40MHz Xtal */
/* set force mode enable of da_pe1_mstckdiv */
mt7621_phy_rmw(phy, RG_PE1_MSTCKDIV_REG,
RG_PE1_MSTCKDIV | RG_PE1_FRC_MSTCKDIV,
FIELD_PREP(RG_PE1_MSTCKDIV, 0x01) |
RG_PE1_FRC_MSTCKDIV);
}
return 0;
}
static int mt7621_pci_phy_init(struct phy *phy)
@ -212,9 +215,7 @@ static int mt7621_pci_phy_init(struct phy *phy)
if (mphy->bypass_pipe_rst)
mt7621_bypass_pipe_rst(mphy);
mt7621_set_phy_for_ssc(mphy);
return 0;
return mt7621_set_phy_for_ssc(mphy);
}
static int mt7621_pci_phy_power_on(struct phy *phy)
@ -324,6 +325,12 @@ static int mt7621_pci_phy_probe(struct platform_device *pdev)
return PTR_ERR(phy->phy);
}
phy->sys_clk = devm_clk_get(dev, NULL);
if (IS_ERR(phy->sys_clk)) {
dev_err(dev, "failed to get phy clock\n");
return PTR_ERR(phy->sys_clk);
}
phy_set_drvdata(phy->phy, phy);
provider = devm_of_phy_provider_register(dev, mt7621_pcie_phy_of_xlate);