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staging: mt7621-pci-phy: add quirks for 'E2' revision using 'soc_device_attribute' 

Depending on revision of the chip, 'mt7621_bypass_pipe_rst' function
must be executed. Add better support for this using 'soc_device_match'
in driver probe function.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2019-04-17 13:58:37 +02:00 committed by Greg Kroah-Hartman
parent d43f53c6cc
commit 9445ccb371
1 changed files with 14 additions and 3 deletions
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17
drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
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@ -11,11 +11,11 @@
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/sys_soc.h>
#include <mt7621.h>
#include <ralink_regs.h>
#define RALINK_CLKCFG1 0x30
#define CHIP_REV_MT7621_E2 0x0101
#define PCIE_PORT_CLK_EN(x) BIT(24 + (x))
@ -97,11 +97,14 @@ struct mt7621_pci_phy_instance {
* @dev: pointer to device
* @phys: pointer to Mt7621 PHY device
* @nphys: number of PHY devices for this core
* @bypass_pipe_rst: mark if 'mt7621_bypass_pipe_rst'
* needs to be executed. Depends on chip revision.
*/
struct mt7621_pci_phy {
struct device *dev;
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)
@ -232,9 +235,8 @@ static int mt7621_pci_phy_init(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 chip_rev_id = rt_sysc_r32(SYSC_REG_CHIP_REV);
if ((chip_rev_id & 0xFFFF) == CHIP_REV_MT7621_E2)
if (mphy->bypass_pipe_rst)
mt7621_bypass_pipe_rst(mphy, instance);
mt7621_set_phy_for_ssc(mphy, instance);
@ -305,9 +307,14 @@ static struct phy *mt7621_pcie_phy_of_xlate(struct device *dev,
return mt7621_phy->phys[args->args[0]]->phy;
}
static const struct soc_device_attribute mt7621_pci_quirks_match[] = {
{ .soc_id = "mt7621", .revision = "E2" }
};
static int mt7621_pci_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct soc_device_attribute *attr;
struct phy_provider *provider;
struct mt7621_pci_phy *phy;
struct resource *res;
@ -324,6 +331,10 @@ static int mt7621_pci_phy_probe(struct platform_device *pdev)
if (!phy->phys)
return -ENOMEM;
attr = soc_device_match(mt7621_pci_quirks_match);
if (attr)
phy->bypass_pipe_rst = true;
phy->dev = dev;
platform_set_drvdata(pdev, phy);