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received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: eYdlKDsmIAyVWdD0I/Oicxxvu0nx8j6XLpUg/zu6sIuggieIrzM5VaSHm7y8MFispXR52oaS8jYaLumGB/XgCePGIOoilwTNwoeqiw+eYICX4FILveKE/543ucFG21r/EyzcJhsPQLmOptumGBGgstEh8TD5uztWUlZrKf3rI7Mc6zbHIB1+fbsM/aUee0e0nwyC3isXwYhbwpJldOHZLaAgQ2AZmweBUhVlCkRqOyiZODCijG50vSPnqvDzyzrgHGcljp0+6eDS+4jXJk8D2b2S126Ug/cw9zIT/8kHEI5hxJGNAqZZNX3mUHSVPFGhxS9d+KxvTQM6CMFLI9JA0DEShrsr5Nc2Gb6CiaPpFONFgTYeliT7726Syltnmzs6qg08FWFZ/ucOrSf3kNuT4adSrweP2NqtSGKN1G3RCHk= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: dba91b8a-da64-4c4d-6f9b-08d69294c74c X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Feb 2019 15:54:57.4531 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR11MB1472 X-OriginatorOrg: microchip.com Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Claudiu Beznea Disable RC oscillator in ULP0 as datasheet specifies. Signed-off-by: Claudiu Beznea --- arch/arm/mach-at91/pm_suspend.S | 39 +++++++++++++++++++++++++++++++++++++= -- 1 file changed, 37 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspen= d.S index 8b18cad1dcf5..5c33023f9129 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -178,11 +178,46 @@ ENDPROC(at91_backup_mode) orr tmp1, tmp1, #AT91_PMC_KEY str tmp1, [pmc, #AT91_CKGR_MOR] =20 + /* Save RC oscillator state */ + ldr tmp1, [pmc, #AT91_PMC_SR] + str tmp1, .saved_osc_status + tst tmp1, #AT91_PMC_MOSCRCS + bne 1f + + /* Turn off RC oscillator */ + ldr tmp1, [pmc, #AT91_CKGR_MOR] + bic tmp1, tmp1, #AT91_PMC_MOSCRCEN + bic tmp1, tmp1, #AT91_PMC_KEY_MASK + orr tmp1, tmp1, #AT91_PMC_KEY + str tmp1, [pmc, #AT91_CKGR_MOR] + + /* Wait main RC disabled done */ +2: ldr tmp1, [pmc, #AT91_PMC_SR] + tst tmp1, #AT91_PMC_MOSCRCS + bne 2b + /* Wait for interrupt */ - at91_cpu_idle +1: at91_cpu_idle =20 - /* Turn on the crystal oscillator */ + /* Restore RC oscillator state */ + ldr tmp1, .saved_osc_status + tst tmp1, #AT91_PMC_MOSCRCS + beq 4f + + /* Turn on RC oscillator */ ldr tmp1, [pmc, #AT91_CKGR_MOR] + orr tmp1, tmp1, #AT91_PMC_MOSCRCEN + bic tmp1, tmp1, #AT91_PMC_KEY_MASK + orr tmp1, tmp1, #AT91_PMC_KEY + str tmp1, [pmc, #AT91_CKGR_MOR] + + /* Wait main RC stabilization */ +3: ldr tmp1, [pmc, #AT91_PMC_SR] + tst tmp1, #AT91_PMC_MOSCRCS + beq 3b + + /* Turn on the crystal oscillator */ +4: ldr tmp1, [pmc, #AT91_CKGR_MOR] orr tmp1, tmp1, #AT91_PMC_MOSCEN orr tmp1, tmp1, #AT91_PMC_KEY str tmp1, [pmc, #AT91_CKGR_MOR] --=20 2.7.4