| Message ID | 1541416443-4321-2-git-send-email-claudiu.beznea@microchip.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | power: reset: at91-poweroff: cleanups | expand |
Hi, On Mon, Nov 05, 2018 at 11:14:23AM +0000, Claudiu.Beznea@microchip.com wrote: > Use only one poweroff function and adapt it to work for both scenarios > (with LPDDR or not). The assignement of pm_power_off was moved at the > end of probe after all initializations are OK. This patch adapt the idea > from commit 4e018c1e9b05 ("power: reset: at91-poweroff: use only one > poweroff function"). > > Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Thanks, queued. -- Sebastian > drivers/power/reset/at91-poweroff.c | 49 ++++++++++++++++++++----------------- > 1 file changed, 27 insertions(+), 22 deletions(-) > > diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c > index fb2fc8f741a1..82533f4c72fc 100644 > --- a/drivers/power/reset/at91-poweroff.c > +++ b/drivers/power/reset/at91-poweroff.c > @@ -76,11 +76,6 @@ static void __init at91_wakeup_status(struct platform_device *pdev) > > static void at91_poweroff(void) > { > - writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, at91_shdwc_base + AT91_SHDW_CR); > -} > - > -static void at91_lpddr_poweroff(void) > -{ > asm volatile( > /* Align to cache lines */ > ".balign 32\n\t" > @@ -89,9 +84,11 @@ static void at91_lpddr_poweroff(void) > " ldr r6, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" > > /* Power down SDRAM0 */ > + " tst %0, #0\n\t" > + " beq 1f\n\t" > " str %1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t" > /* Shutdown CPU */ > - " str %3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" > + "1: str %3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" > > " b .\n\t" > : > @@ -177,34 +174,42 @@ static int __init at91_poweroff_probe(struct platform_device *pdev) > if (pdev->dev.of_node) > at91_poweroff_dt_set_wakeup_mode(pdev); > > - pm_power_off = at91_poweroff; > - > np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc"); > - if (!np) > - return 0; > + if (np) { > + mpddrc_base = of_iomap(np, 0); > + of_node_put(np); > > - mpddrc_base = of_iomap(np, 0); > - of_node_put(np); > + if (!mpddrc_base) { > + ret = -ENOMEM; > + goto clk_disable; > + } > > - if (!mpddrc_base) > - return 0; > + ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & > + AT91_DDRSDRC_MD; > + if (ddr_type != AT91_DDRSDRC_MD_LPDDR2 && > + ddr_type != AT91_DDRSDRC_MD_LPDDR3) { > + iounmap(mpddrc_base); > + mpddrc_base = NULL; > + } > + } > > - ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & AT91_DDRSDRC_MD; > - if ((ddr_type == AT91_DDRSDRC_MD_LPDDR2) || > - (ddr_type == AT91_DDRSDRC_MD_LPDDR3)) > - pm_power_off = at91_lpddr_poweroff; > - else > - iounmap(mpddrc_base); > + pm_power_off = at91_poweroff; > > return 0; > + > +clk_disable: > + clk_disable_unprepare(sclk); > + return ret; > } > > static int __exit at91_poweroff_remove(struct platform_device *pdev) > { > - if (pm_power_off == at91_poweroff || > - pm_power_off == at91_lpddr_poweroff) > + if (pm_power_off == at91_poweroff) > pm_power_off = NULL; > > + if (mpddrc_base) > + iounmap(mpddrc_base); > + > clk_disable_unprepare(sclk); > > return 0; > -- > 2.7.4 >
diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c index fb2fc8f741a1..82533f4c72fc 100644 --- a/drivers/power/reset/at91-poweroff.c +++ b/drivers/power/reset/at91-poweroff.c @@ -76,11 +76,6 @@ static void __init at91_wakeup_status(struct platform_device *pdev) static void at91_poweroff(void) { - writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, at91_shdwc_base + AT91_SHDW_CR); -} - -static void at91_lpddr_poweroff(void) -{ asm volatile( /* Align to cache lines */ ".balign 32\n\t" @@ -89,9 +84,11 @@ static void at91_lpddr_poweroff(void) " ldr r6, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" /* Power down SDRAM0 */ + " tst %0, #0\n\t" + " beq 1f\n\t" " str %1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t" /* Shutdown CPU */ - " str %3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" + "1: str %3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t" " b .\n\t" : @@ -177,34 +174,42 @@ static int __init at91_poweroff_probe(struct platform_device *pdev) if (pdev->dev.of_node) at91_poweroff_dt_set_wakeup_mode(pdev); - pm_power_off = at91_poweroff; - np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc"); - if (!np) - return 0; + if (np) { + mpddrc_base = of_iomap(np, 0); + of_node_put(np); - mpddrc_base = of_iomap(np, 0); - of_node_put(np); + if (!mpddrc_base) { + ret = -ENOMEM; + goto clk_disable; + } - if (!mpddrc_base) - return 0; + ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & + AT91_DDRSDRC_MD; + if (ddr_type != AT91_DDRSDRC_MD_LPDDR2 && + ddr_type != AT91_DDRSDRC_MD_LPDDR3) { + iounmap(mpddrc_base); + mpddrc_base = NULL; + } + } - ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & AT91_DDRSDRC_MD; - if ((ddr_type == AT91_DDRSDRC_MD_LPDDR2) || - (ddr_type == AT91_DDRSDRC_MD_LPDDR3)) - pm_power_off = at91_lpddr_poweroff; - else - iounmap(mpddrc_base); + pm_power_off = at91_poweroff; return 0; + +clk_disable: + clk_disable_unprepare(sclk); + return ret; } static int __exit at91_poweroff_remove(struct platform_device *pdev) { - if (pm_power_off == at91_poweroff || - pm_power_off == at91_lpddr_poweroff) + if (pm_power_off == at91_poweroff) pm_power_off = NULL; + if (mpddrc_base) + iounmap(mpddrc_base); + clk_disable_unprepare(sclk); return 0;
Use only one poweroff function and adapt it to work for both scenarios (with LPDDR or not). The assignement of pm_power_off was moved at the end of probe after all initializations are OK. This patch adapt the idea from commit 4e018c1e9b05 ("power: reset: at91-poweroff: use only one poweroff function"). Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> --- drivers/power/reset/at91-poweroff.c | 49 ++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 22 deletions(-)