Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-09-21 07:01:57 +00:00
Code Issues Projects Releases Packages Wiki Activity

phy: stm32-usbphyc: add counter of PLL consumer

Browse source 
Add the counter of the PLL user n_pll_cons managed by the 2 functions
stm32_usbphyc_pll_enable / stm32_usbphyc_pll_disable.

This counter allow to remove the function stm32_usbphyc_is_init
and it is a preliminary step for ck_usbo_48m introduction.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2022-04-26 14:37:47 +02:00
parent 0a1a755636
commit 3c2db62958
1 changed files with 48 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

76
drivers/phy/phy-stm32-usbphyc.c
View file

@ -144,6 +144,7 @@ struct stm32_usbphyc {
bool init;
bool powered;
} phys[MAX_PHYS];
int n_pll_cons;
};
static void stm32_usbphyc_get_pll_params(u32 clk_rate,
@ -203,18 +204,6 @@ static int stm32_usbphyc_pll_init(struct stm32_usbphyc *usbphyc)
return 0;
}
static bool stm32_usbphyc_is_init(struct stm32_usbphyc *usbphyc)
{
int i;
for (i = 0; i < MAX_PHYS; i++) {
if (usbphyc->phys[i].init)
return true;
}
return false;
}
static bool stm32_usbphyc_is_powered(struct stm32_usbphyc *usbphyc)
{
int i;
@ -227,18 +216,17 @@ static bool stm32_usbphyc_is_powered(struct stm32_usbphyc *usbphyc)
return false;
}
static int stm32_usbphyc_phy_init(struct phy *phy)
static int stm32_usbphyc_pll_enable(struct stm32_usbphyc *usbphyc)
{
struct stm32_usbphyc *usbphyc = dev_get_priv(phy->dev);
struct stm32_usbphyc_phy *usbphyc_phy = usbphyc->phys + phy->id;
bool pllen = readl(usbphyc->base + STM32_USBPHYC_PLL) & PLLEN ?
true : false;
int ret;
dev_dbg(phy->dev, "phy ID = %lu\n", phy->id);
/* Check if one phy port has already configured the pll */
if (pllen && stm32_usbphyc_is_init(usbphyc))
goto initialized;
/* Check if one consumer has already configured the pll */
if (pllen && usbphyc->n_pll_cons) {
usbphyc->n_pll_cons++;
return 0;
}
if (usbphyc->vdda1v1) {
ret = regulator_set_enable(usbphyc->vdda1v1, true);
@ -269,23 +257,19 @@ static int stm32_usbphyc_phy_init(struct phy *phy)
if (!(readl(usbphyc->base + STM32_USBPHYC_PLL) & PLLEN))
return -EIO;
initialized:
usbphyc_phy->init = true;
usbphyc->n_pll_cons++;
return 0;
}
static int stm32_usbphyc_phy_exit(struct phy *phy)
static int stm32_usbphyc_pll_disable(struct stm32_usbphyc *usbphyc)
{
struct stm32_usbphyc *usbphyc = dev_get_priv(phy->dev);
struct stm32_usbphyc_phy *usbphyc_phy = usbphyc->phys + phy->id;
int ret;
dev_dbg(phy->dev, "phy ID = %lu\n", phy->id);
usbphyc_phy->init = false;
usbphyc->n_pll_cons--;
/* Check if other phy port requires pllen */
if (stm32_usbphyc_is_init(usbphyc))
/* Check if other consumer requires pllen */
if (usbphyc->n_pll_cons)
return 0;
clrbits_le32(usbphyc->base + STM32_USBPHYC_PLL, PLLEN);
@ -314,6 +298,42 @@ static int stm32_usbphyc_phy_exit(struct phy *phy)
return 0;
}
static int stm32_usbphyc_phy_init(struct phy *phy)
{
struct stm32_usbphyc *usbphyc = dev_get_priv(phy->dev);
struct stm32_usbphyc_phy *usbphyc_phy = usbphyc->phys + phy->id;
int ret;
dev_dbg(phy->dev, "phy ID = %lu\n", phy->id);
if (usbphyc_phy->init)
return 0;
ret = stm32_usbphyc_pll_enable(usbphyc);
if (ret)
return log_ret(ret);
usbphyc_phy->init = true;
return 0;
}
static int stm32_usbphyc_phy_exit(struct phy *phy)
{
struct stm32_usbphyc *usbphyc = dev_get_priv(phy->dev);
struct stm32_usbphyc_phy *usbphyc_phy = usbphyc->phys + phy->id;
int ret;
dev_dbg(phy->dev, "phy ID = %lu\n", phy->id);
if (!usbphyc_phy->init)
return 0;
ret = stm32_usbphyc_pll_disable(usbphyc);
usbphyc_phy->init = false;
return log_ret(ret);
}
static int stm32_usbphyc_phy_power_on(struct phy *phy)
{
struct stm32_usbphyc *usbphyc = dev_get_priv(phy->dev);