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Tue, 28 Jun 2022 22:04:36 +0000 (GMT) From: Marek Szyprowski To: linux-pci@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-phy@lists.infradead.org Cc: Marek Szyprowski , Jingoo Han , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Krzysztof Kozlowski , Alim Akhtar , Kishon Vijay Abraham I , Vinod Koul Subject: [PATCH 1/2] phy: samsung: phy-exynos-pcie: sanitize init/power_on callbacks Date: Wed, 29 Jun 2022 00:04:08 +0200 Message-Id: <20220628220409.26545-1-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA0WSa1BMcRjG53/O7jmn1XLajf5EWArNlJCZY1xzGWf4QI3xoYY6OF1oK3va LRkjNtJaizK23Sgq00XZbKm226hoMysSk1uNmBjTZSgJubadxbfnfZ7nN8+Xl0AlZ4UziKiY eFYRw0TLMJGgsuXbA5/PSbV7/DLavame7EqMyj8eSRWOGHCq/a0Wo+r7b+FUsva7kGrLtmLU ueJRAZX5sAGhUn6kCKjSO9049buuGqcsXa3oOjFtMXbj9BWzkjYXp2F0V2cdRvc+0SN0ef5R WldRDGjrsyqE/mT22O4ULFq1j42OUrGKxWvCRJEDneVoXNO0xKL3ZwTJ4KJUA5wISPrDosYc RANEhIQsBLDid5uQP0YArK0aBPzxCcCx0X78L3Jn+KkDKQCwsKUZ/4eUtJ0A9hZGLoGaQQ1m 164kA8tzNai9hJIFKMwrvSC0B1JyJ+zIbJwoCUhPaOgbmoDF5Gr4MzvfMTcbXi+7PQFDspWA VTfTUD7YCGtHrYDXUthnrXAAM6EtQyvQAGJcx8Kfmct4OxF29pc40JWw68EYZq+g5CJoqlnM 2wHw1bGrCE9Ohs8GXew2Oi7TK/Uob4vhqZMSvu0FjdYb/zYb2zscFRoa1IF2W0Lugr3G09g5 4GH8P3UFgGLgxio5eQTLLY1hE3w5Rs4pYyJ898bKzWD8Z2y/rCPVoKBvyLcJIARoApBAZa7i q/cteyTifcyhJFYRG6pQRrNcE3AnBDI38d6oMkZCRjDx7AGWjWMVf1OEcJqRjJw/8eRxhcst 2+t4n0kpN4ryJ1eH5MUe2X9wQPeyMy7B0JzrVZLUor8UINN7e69NCp4bOhUL37pDury8YV3g nJsLRf3C8PSX9VlBzpzJv1SdmrKhF4Z/HPbUpgadcskp29Qb3pFD01NCBi7BrOv1gUjg7vlP X0C/5VFaq/mNOjXxbrdyh236MnyO7YunXv38kXuEYb0uLEERaqIUhZXK9CGpSf7usO4yk9V1 wBKfm5B291prtbP/i57H97xq5N9dfT4Me8jeWA+2q6bMcttY5ZylqvP7mqw2Bl2euwKXpwfU cJptphXu4iPZee8DNuvUqkyPLbJ5nxf0WOrDulWvzo7JBFwks8QbVXDMH/uuzXSiAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrBLMWRmVeSWpSXmKPExsVy+t/xe7pfq3YnGfw5wmPxYN42NoslTRkW K77MZLe48LSHzWLv663sFg09v1ktzs47zmYxYdU3FosZ5/cxWbT8aWGxWHvkLrvF/z072C12 3jnB7MDrsXPWXXaPBZtKPTat6mTzuHNtD5vHkyvTmTw2L6n36NuyitHj+I3tTB6fN8kFcEbp 2RTll5akKmTkF5fYKkUbWhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSWpRbp2yXoZby5tpm5 4JBYxcoXvSwNjNOEuxg5OSQETCSOfLrO1MXIxSEksJRR4uSVg0wQCRmJk9MaWCFsYYk/17rY IIo+MUpc+7MVLMEmYCjR9RYkwckhIpAssfn8D7AiZoH1zBL7r18HmyQsECKxpKeLBcRmEVCV mPnqIyOIzStgK/F33hJ2iA3yEqs3HGCewMizgJFhFaNIamlxbnpusZFecWJucWleul5yfu4m RmCQbzv2c8sOxpWvPuodYmTiYDzEKMHBrCTCu/DMziQh3pTEyqrUovz4otKc1OJDjKZA+yYy S4km5wPjLK8k3tDMwNTQxMzSwNTSzFhJnNezoCNRSCA9sSQ1OzW1ILUIpo+Jg1OqgSniwMNL jwPWT7jOI9d3Lm2XQ4LyvjvBXR0b5D277Pn/2/ytNli4Xf73tWM6N4MW38gPXvPkc65AbZxe c/hXCVelOxEW8xaV5D+pdbct3Pd8u9c0gS0dDqsPdu9klzR6XHBAPT3yQgaLwcSfMXEdnhcv cC0LM668/eCWrQ7/lOmGLBNSHBiCm+cpvCnVOPpt7587XTW/uGuFD8iuSb/o0Syo6hUbYfPi 3MyDbi+mb5yxeep/no0PJuocKXfUNVeW9Whcdc5XZ8aJC6uS1t+deSp378x7zkZpm05w/9zr v/SrQZHsL7tLfoyeqYvcwkx2dbO03EuP8AyQXnco7VBMW2Mne2Ro1fwNjtx7OBLaVimxFGck GmoxFxUnAgCPG9qD+wIAAA== X-CMS-MailID: 20220628220437eucas1p2c478751458323f93a71050c4a949f12e X-Msg-Generator: CA X-RootMTR: 20220628220437eucas1p2c478751458323f93a71050c4a949f12e X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220628220437eucas1p2c478751458323f93a71050c4a949f12e References: X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The exynos-pcie driver called phy_power_on() and then phy_init() for some historical reasons. However the generic PHY framework assumes that the proper sequence is to call phy_init() first, then phy_power_on(). The operations done by both functions should be considered as one action and as such they are called by the exynos-pcie driver (without doing anything between them). The initialization is just a sequence of register writes, which cannot be altered, without breaking the hardware operation. To match the generic PHY framework requirement, simply move all register writes to the phy_init()/phy_exit() and drop power_on()/power_off() callbacks. This way the driver will also work with the old (incorrect) PHY initialization call sequence. Reported-by: Bjorn Helgaas Signed-off-by: Marek Szyprowski Reviewed-by: Chanho Park Acked-by: Krzysztof Kozlowski Acked-By: Vinod Koul --- drivers/phy/samsung/phy-exynos-pcie.c | 25 +++++++++---------------- 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/drivers/phy/samsung/phy-exynos-pcie.c b/drivers/phy/samsung/phy-exynos-pcie.c index 578cfe07d07a..53c9230c2907 100644 --- a/drivers/phy/samsung/phy-exynos-pcie.c +++ b/drivers/phy/samsung/phy-exynos-pcie.c @@ -51,6 +51,13 @@ static int exynos5433_pcie_phy_init(struct phy *phy) { struct exynos_pcie_phy *ep = phy_get_drvdata(phy); + regmap_update_bits(ep->pmureg, EXYNOS5433_PMU_PCIE_PHY_OFFSET, + BIT(0), 1); + regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_GLOBAL_RESET, + PCIE_APP_REQ_EXIT_L1_MODE, 0); + regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_L1SUB_CM_CON, + PCIE_REFCLK_GATING_EN, 0); + regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_COMMON_RESET, PCIE_PHY_RESET, 1); regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_MAC_RESET, @@ -109,20 +116,7 @@ static int exynos5433_pcie_phy_init(struct phy *phy) return 0; } -static int exynos5433_pcie_phy_power_on(struct phy *phy) -{ - struct exynos_pcie_phy *ep = phy_get_drvdata(phy); - - regmap_update_bits(ep->pmureg, EXYNOS5433_PMU_PCIE_PHY_OFFSET, - BIT(0), 1); - regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_GLOBAL_RESET, - PCIE_APP_REQ_EXIT_L1_MODE, 0); - regmap_update_bits(ep->fsysreg, PCIE_EXYNOS5433_PHY_L1SUB_CM_CON, - PCIE_REFCLK_GATING_EN, 0); - return 0; -} - -static int exynos5433_pcie_phy_power_off(struct phy *phy) +static int exynos5433_pcie_phy_exit(struct phy *phy) { struct exynos_pcie_phy *ep = phy_get_drvdata(phy); @@ -135,8 +129,7 @@ static int exynos5433_pcie_phy_power_off(struct phy *phy) static const struct phy_ops exynos5433_phy_ops = { .init = exynos5433_pcie_phy_init, - .power_on = exynos5433_pcie_phy_power_on, - .power_off = exynos5433_pcie_phy_power_off, + .exit = exynos5433_pcie_phy_exit, .owner = THIS_MODULE, };