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Two clk driver fixes

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- Make the regulator state match the GDSC power domain state at boot
    on Qualcomm SoCs so that the regulator isn't turned off
    inadvertently.
 
  - Fix earlycon on i.MX6Q SoCs
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk driver fixes from Stephen Boyd:

 - Make the regulator state match the GDSC power domain state at boot on
   Qualcomm SoCs so that the regulator isn't turned off inadvertently.

 - Fix earlycon on i.MX6Q SoCs

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: qcom: gdsc: Ensure regulator init state matches GDSC state
  clk: imx6q: fix uart earlycon unwork
This commit is contained in:
Linus Torvalds 2021-08-21 11:27:16 -07:00
commit 9ff50bf2f2
2 changed files with 38 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/clk/imx/clk-imx6q.c
View file

@ -974,6 +974,6 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
hws[IMX6QDL_CLK_PLL3_USB_OTG]->clk);
}
imx_register_uart_clocks(1);
imx_register_uart_clocks(2);
}
CLK_OF_DECLARE(imx6q, "fsl,imx6q-ccm", imx6q_clocks_init);

56
drivers/clk/qcom/gdsc.c
View file

@ -357,27 +357,43 @@ static int gdsc_init(struct gdsc *sc)
if (on < 0)
return on;
/*
* Votable GDSCs can be ON due to Vote from other masters.
* If a Votable GDSC is ON, make sure we have a Vote.
*/
if ((sc->flags & VOTABLE) && on)
if (on) {
/* The regulator must be on, sync the kernel state */
if (sc->rsupply) {
ret = regulator_enable(sc->rsupply);
if (ret < 0)
return ret;
}
/*
* Votable GDSCs can be ON due to Vote from other masters.
* If a Votable GDSC is ON, make sure we have a Vote.
*/
if (sc->flags & VOTABLE) {
ret = regmap_update_bits(sc->regmap, sc->gdscr,
SW_COLLAPSE_MASK, val);
if (ret)
return ret;
}
/* Turn on HW trigger mode if supported */
if (sc->flags & HW_CTRL) {
ret = gdsc_hwctrl(sc, true);
if (ret < 0)
return ret;
}
/*
* Make sure the retain bit is set if the GDSC is already on,
* otherwise we end up turning off the GDSC and destroying all
* the register contents that we thought we were saving.
*/
if (sc->flags & RETAIN_FF_ENABLE)
gdsc_retain_ff_on(sc);
} else if (sc->flags & ALWAYS_ON) {
/* If ALWAYS_ON GDSCs are not ON, turn them ON */
gdsc_enable(&sc->pd);
/*
* Make sure the retain bit is set if the GDSC is already on, otherwise
* we end up turning off the GDSC and destroying all the register
* contents that we thought we were saving.
*/
if ((sc->flags & RETAIN_FF_ENABLE) && on)
gdsc_retain_ff_on(sc);
/* If ALWAYS_ON GDSCs are not ON, turn them ON */
if (sc->flags & ALWAYS_ON) {
if (!on)
gdsc_enable(&sc->pd);
on = true;
sc->pd.flags |= GENPD_FLAG_ALWAYS_ON;
}
if (on || (sc->pwrsts & PWRSTS_RET))
@ -385,6 +401,8 @@ static int gdsc_init(struct gdsc *sc)
else
gdsc_clear_mem_on(sc);
if (sc->flags & ALWAYS_ON)
sc->pd.flags |= GENPD_FLAG_ALWAYS_ON;
if (!sc->pd.power_off)
sc->pd.power_off = gdsc_disable;
if (!sc->pd.power_on)