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arm, davinci: Add function lpsc_syncreset()
This patch adds a function lpsc_syncreset that allows setting a lpsc module into Sync Reset state. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Heiko Schocher <hs@denx.de> Cc: Paulraj Sandeep <s-paulraj@ti.com> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Acked-by: Heiko Schocher <hs@denx.de> Tested-by: Heiko Schocher <hs@denx.de> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
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2 changed files with 17 additions and 5 deletions
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@ -46,7 +46,7 @@
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*/
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/* Works on Always On power domain only (no PD argument) */
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void lpsc_on(unsigned int id)
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static void lpsc_transition(unsigned int id, unsigned int state)
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{
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dv_reg_p mdstat, mdctl, ptstat, ptcmd;
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#ifdef CONFIG_SOC_DA8XX
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@ -83,10 +83,10 @@ void lpsc_on(unsigned int id)
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while (readl(ptstat) & 0x01)
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continue;
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if ((readl(mdstat) & PSC_MDSTAT_STATE) == 0x03)
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return; /* Already on and enabled */
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if ((readl(mdstat) & PSC_MDSTAT_STATE) == state)
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return; /* Already in that state */
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writel(readl(mdctl) | 0x03, mdctl);
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writel((readl(mdctl) & ~PSC_MDCTL_NEXT) | state, mdctl);
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switch (id) {
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#ifdef CONFIG_SOC_DM644X
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@ -114,10 +114,20 @@ void lpsc_on(unsigned int id)
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while (readl(ptstat) & 0x01)
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continue;
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while ((readl(mdstat) & PSC_MDSTAT_STATE) != 0x03)
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while ((readl(mdstat) & PSC_MDSTAT_STATE) != state)
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continue;
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}
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void lpsc_on(unsigned int id)
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{
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lpsc_transition(id, 0x03);
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}
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void lpsc_syncreset(unsigned int id)
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{
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lpsc_transition(id, 0x01);
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}
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/* Not all DaVinci chips have a DSP power domain. */
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#ifdef CONFIG_SOC_DM644X
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@ -292,6 +292,7 @@ typedef volatile unsigned int * dv_reg_p;
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#endif /* CONFIG_SOC_DA8XX */
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void lpsc_on(unsigned int id);
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void lpsc_syncreset(unsigned int id);
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void dsp_on(void);
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void davinci_enable_uart0(void);
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@ -358,6 +359,7 @@ struct davinci_psc_regs {
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#endif /* CONFIG_SOC_DA8XX */
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#define PSC_MDSTAT_STATE 0x3f
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#define PSC_MDCTL_NEXT 0x07
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#ifndef CONFIG_SOC_DA8XX
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